V3 PROTECTIVE RELAY TESTER

RX 4718W
INSTRUCTION MANUALNF Corporation

DA00014257-002

RX 4718W
V3 PROTECTIVE
RELAY TESTER

Instruction Manual
V3 PROTECTIVE RELAY TESTER

------------ Forward------------

Thank you so much for procuring RX4718W V3 PROTECTIVE RELAY TESTER. At theoutset, please take a few minutes to read the Safety Precautions indicated in this manual inorder to use this equipment safely and correctly.
■ Warning and Caution notices
The following Warning and Caution notices appear in this manual. These must be observed in order toprotect both the user from physical harm and the equipment from damage.
！

Warning

Risk of serious and possible fatal physical injury from electric shock or other cause.

！

CautionRisk of damage to the equipment.

■ Manual composition
Please read Section 1 before using the equipment for the first time.
Section 1. Overview
Describes an outline, features, applications, functions and an outline of the principle of ope
ration of the RX4718W.
Section 2. Preparation
Describes required preparatory work before installing and operating the equipment.
Section 3. Description of panel and basic operation
Describes the functions, operations and basic operations of the dials on the panel.
Read while operating the equipment.
Section 4. Practical oparation
Describes further operations.
Section 5. GPIB interface
Describes remote control by the GPIB.
Section 6. RS-232C interface
Describes remote control by the RS-232C.
Section 7. Troubleshooting
Corrective measures when error messages or abnormalities occur.
Section 8. Maintenance
Describes the methods of storage, repacking, transportation and performance test.
Section 9. Specifications
Equipment specifications (functions and performance) are described.

RX4718Wi------------ Safety Precautions------------

Observe the following warnings and cautions in order to use this equipment safely. No responsibility or
warranty is assumed for damages arising from use in a manner contrary to these warnings and cautions.
■ Observe text instructions
This manual has been compiled in order to enable safe operation and use of this equipment. Be sure toread this manual before using the equipment.
Items designated by warning advice of serious physical hazards. Be sure to observe them carefully.
■ Be sure to connect to ground
Since the unit includes a built-in line-filter, there is risk of shock if used without grounding.
To prevent getting an electric shock, securely connect the equipment to a ground providing a resistanceto ground of 100 ohms or less according to the electrical installation technical standard.
Be sure to properly connect the ground. By connecting the 3-conductor power cable to a grounded
3-terminal wall socket, the equipment is automatically grounded.
When using a 3-pole-to-2-pole conversion adapter, be sure to connect the grounding wire (green) of theconversion adapter to the grounding terminal, or connect the [GND] terminal on the left side panel to thegrounding terminal with the wire of 2mm2 or greater.
■ Confirm power supply voltage
This equipment operates at a power supply voltage described in “Grounding and power supply
connection” in this operation manual.
Before connecting this equipment with power line, check that the proper voltage is being supplied to thewall power outlet.
■ Smoke, odor, noiseIn event smoke, peculiar odor or noise is emitted, immediately disconnect the power source and avoid
further operation.
Whenever such an abnormality occurs, prevent the equipment from being used until it is completely
repaired and immediately contact us or our sales agency.
■ Pay special attention when removing covers
This equipment has internal dip switches that allow to prohibit/permit the functions such as “output on
all together” and “waveform-switch +DC/-DC”. When these settings need to be changed, the top coverneeds to be removed. Note that a dip switch on the top of the PCB only is set up at this time.
！

Warning

Disconnect the power cable before removing the top cover.
This equipment contains dangerously high voltages. Do not touch other than the dip switch.

RX4718W

ii

■ Flammable gas
Do not use this equipment in the presence of flammable gas. There is danger of fire and explosion.
■ Do not modify
Do not use parts other than specified by the manufacturer and by no means attempt to modify theequipment.
There is the risk of personnel hazard and damage to the equipment. The manufacturer reserves the optionof refusing service in such cases.
■ Safety related symbols and indications
Following are general definitions of the symbols and indications used on the product.
Operation manual reference symbol！

This symbol appears on advices of possible hazard to the user, as well as the need toconsult this manual when using an operation or function.
CautionSymbol indicating danager of electric shock

High Voltage

This symbol is posted in places posing danger of electric shock in the particularconditions.
Protective grounding terminal symbolThis symbol appears on a terminal that needs to be grounded to prevent electric shock.
Before operating the equipment, be sure to connect this terminal to a ground providing a
resistance to ground for 100 ohms or less.
(Connecting the 3 conductor power cable to a 3-terminal wall socket with grounding
eliminates the need to ground this grounding terminal.)■ Other symbolThis symbol indicates that the external conductor of the connector is connected to thecase.
！

Warning

This equipment is used to measure characteristics of a protective relay, and is intended to
be operated by professional users who are engaged in maintenance work at power stations
or substations, etc. and have a thorough understanding of safety. This equipment istherefore designed giving priority to functionality and operability over safety compared togeneral measuring instruments. When operating, pay special attention to safety to prevent
accidents, etc.
Be extremely careful with the following: The power input terminal on the left side (AC85V-115V, AC180V-240V) is to be used
when the supplied power cable is missing. When using the power input terminal, be
extremely careful not to receive electric shock.
 A voltage of a maximum of 250Vrms is output to the voltage output terminal on the front
panel. When operating the product, be extremely careful to avoid accidents such as
electric shock.

RX4718W

iii

Contents
1.

2.

3.

General Description ........................................................................................................ 1-1
1.1

Overview .................................................................................................................. 1-2

1.2

Features .................................................................................................................. 1-2

1.3

Function list ............................................................................................................. 1-3

1.4

Principle of operation ............................................................................................... 1-6

Preparation before use ................................................................................................... 2-1
2.1

Installation location .................................................................................................. 2-3

2.2

Setting of internal dip switch .................................................................................... 2-4

2.3

Grounding and power supply ................................................................................... 2-5

Description of Panel Controls and Basic Operation ........................................................ 3-1
3.1

Name and function of each part of the panel............................................................ 3-2

3.1.1

Left side panel .................................................................................................. 3-3

3.1.2

Right side panel ................................................................................................ 3-6

3.2

Start ....................................................................................................................... 3-14

3.2.1

Power on......................................................................................................... 3-14

3.2.2

Initial setting .................................................................................................... 3-15

3.3

Operation of amplifier output .................................................................................. 3-18

3.3.1

Setting of output range.................................................................................... 3-18

3.3.2

Output ON/OFF............................................................................................... 3-19

3.3.3

Operation at overload ..................................................................................... 3-19

3.3.4

Output selector ............................................................................................... 3-20

A)

Output to Front terminal .................................................................................. 3-21

B)

Output to Side connecter ................................................................................ 3-21

C)

1-PHASE ........................................................................................................ 3-22

3.4

Output signal setting .............................................................................................. 3-24

3.4.1

Frequency setting ........................................................................................... 3-24

A)

Refernce phase and frequency synchronization signal input/output ................ 3-25

3.4.2

Setting of amplitude and phase ....................................................................... 3-25

A)

Balanced 3-phase and Interlock 3-phase ........................................................ 3-27

B)

2LS setting ...................................................................................................... 3-29

C)

Line voltage calculation function ..................................................................... 3-30

D)

Phase rotation ................................................................................................. 3-31

3.4.3

Waveform selection......................................................................................... 3-32

A)
3.5

Setting of harmonic-1 parameters*1＊１（Japanese model only） ............. 3-33

Operation mode ..................................................................................................... 3-34

3.5.1

Trip input and operation start input .................................................................. 3-35

A)

Setting of [TRIP INPUT] logic .......................................................................... 3-36

RX4718Wi

B)

Setting of trip input chattering correction function ........................................... 3-36

C)

Setting of operation start input logic ................................................................ 3-37

D)

Stop Function of operation start input ............................................................. 3-37

3.5.2

Operation of manual mode .............................................................................. 3-38

3.5.3

Operation of quick change mode .................................................................... 3-38

A)

Timer............................................................................................................... 3-41

B)

Fault duration .................................................................................................. 3-44

C)

Pre-trigger time and fault start phase .............................................................. 3-45

3.5.4

Simultaneous operation/recovery measurement mode ................................... 3-47

3.5.5

Operation of normal sweep ............................................................................. 3-48

A)

Manual sweep ................................................................................................. 3-49

B)

Automatic sweep............................................................................................. 3-50

3.5.6

Operation of Search / DSK-Search sweep ...................................................... 3-51

A)

Search sweep ................................................................................................. 3-53

B)

DSK search sweep ......................................................................................... 3-55

3.5.7

Operation of 95 relay test mode (frequency relay) .......................................... 3-57

3.5.8

Operation of SOR quick change mode (Step-out Relay) ................................. 3-59

3.6

Other basic operation ............................................................................................ 3-60

3.6.1

Other function ................................................................................................. 3-60

A) Beep setting ......................................................................................................... 3-62
3.6.2
4.

Practical operation .......................................................................................................... 4-1
4.1

5.

Panel setting memory ..................................................................................... 3-62

Master/slave function of this series .......................................................................... 4-2

4.1.1

Master/slave setting .......................................................................................... 4-2

4.1.2

Master/slave connection ................................................................................... 4-3

4.1.3

Master/slave operation ...................................................................................... 4-5

A)

Synchronization of operation mode ................................................................... 4-5

B)

Simultaneous setting change ............................................................................ 4-5

C)All outputs on/off ............................................................................................... 4-5

D)

Selector communication function ...................................................................... 4-5

E)

Trip phase selection function ............................................................................ 4-6

4.2

Amplifier input signal selection................................................................................. 4-7

4.3

Operation of extended response input ..................................................................... 4-9

4.4

Operation in combined system with other type of units .......................................... 4-10

4.4.1

Frequency Synchronization ............................................................................. 4-10

4.4.2

Synchronization of quick change operation ..................................................... 4-11

4.4.3

Connection with 4705A ................................................................................... 4-12

A)

Individual setting of pre-trigger time and fault start phase ............................... 4-12

B)

Connection for simultaneous quick change to fault ......................................... 4-14

GPIB interface ................................................................................................................ 5-1
5.1

Overview of GPIB .................................................................................................... 5-2

RX4718W

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5.1.1

GPIB specifications ........................................................................................... 5-2

5.1.2

Signals on bus line and their behavior .............................................................. 5-3

5.1.3

GPIB handshake ............................................................................................... 5-4

5.1.4

Data transmission example ............................................................................... 5-5

5.1.5

Specifications of talker functions ....................................................................... 5-6

5.1.6

Specifications of listener functions .................................................................... 5-6

5.1.7

Multi-line interface messages ............................................................................ 5-6

5.2

5.2.1

Specifications .................................................................................................... 5-8

5.2.2

Notes on handling GPIB.................................................................................. 5-12

5.2.3

Setting of GPIB ............................................................................................... 5-13

5.2.4

Remote/local behavior .................................................................................... 5-14

5.2.5

Setting program codes .................................................................................... 5-15

A)

Setting the basic data on amplitude and phase ............................................... 5-15

B)

Response to query message........................................................................... 5-16

5.3
6.

RX4718W GPIB interface ........................................................................................ 5-8

Program code list ................................................................................................... 5-17

RS-232C interface .......................................................................................................... 6-1
6.1

Overview of RS-232C .............................................................................................. 6-2

6.1.1
6.2

7.

8.

RX-232C interface of RX4718W .............................................................................. 6-5

6.2.1

Specifications .................................................................................................... 6-5

6.2.2

Connector and signal line ................................................................................. 6-6

6.2.3

Connecting connector lines ............................................................................... 6-8

6.2.4

Setting of RS-232C ........................................................................................... 6-9

6.2.5

Setting of program codes ................................................................................ 6-10

Troubleshooting .............................................................................................................. 7-1
7.1

Error message ......................................................................................................... 7-2

7.2

Handling apparent faults .......................................................................................... 7-4

Maintenance ................................................................................................................... 8-1
8.1

Daily cleaning .......................................................................................................... 8-2

8.1.1

9.

Specifications of RS-232C ................................................................................ 6-3

Memory backup battery..................................................................................... 8-2

8.2

Storage･Repacking･Transportation ......................................................................... 8-3

8.3

How to check the version number ............................................................................ 8-3

8.4

Performance test ..................................................................................................... 8-4

8.4.1

Preparation before performance test ................................................................. 8-4

8.4.2

Output amplitude･phase ................................................................................... 8-5

8.4.3

Distortion rate ................................................................................................... 8-6

8.4.4

Frequency accuracy .......................................................................................... 8-6

8.4.5

Timer accuracy ................................................................................................. 8-7

Specification ................................................................................................................... 9-1

RX4718Wiii

9.1

Voltage output rating ................................................................................................ 9-2

9.1.1

AC output .......................................................................................................... 9-2

9.1.2

DC output.......................................................................................................... 9-4

9.2

Signal generator ...................................................................................................... 9-5

9.3

Operation mode ....................................................................................................... 9-6

9.4

Timer ....................................................................................................................... 9-9

9.5

Output selector ...................................................................................................... 9-10

9.6

Master/slave .......................................................................................................... 9-11

9.7

Amplifier input selection ......................................................................................... 9-12

9.8

Other functions ...................................................................................................... 9-13

9.9

Various input/output ............................................................................................... 9-14

9.10

Interface ................................................................................................................ 9-17

9.10.1

GPIB ............................................................................................................... 9-17

9.10.2

RS-232C ......................................................................................................... 9-17

9.11

General .................................................................................................................. 9-18

RX4718W

iv

Figure List
FIGURE 1-1 BLOCK DIAGRAM .................................................................................................... 1-6
FIGURE 2-1 SETTING OF INTERNAL DIP SWITCH .......................................................................... 2-4
FIGURE 2-2 CONNECTION OF POWER CABLE .............................................................................. 2-6
FIGURE 2-3 PIN CONNECTION OF POWER INPUT CONNECTOR AND POWER OUTPUT CONNECTOR .... 2-6
FIGURE 3-1 PIN CONNECTION OF VOLTAGE OUTPUT 1L/2L CONNECTOR AND 3-PHASE 4-WIRE
VOLTAGE OUTPUT CABLE ..................................................................................... 3-20
FIGURE 3-2 CONFIGURATION OF OUTPUT CHANGER ................................................................. 3-20
FIGURE 3-3 OPERATION OF OUTPUT SELECTOR IN 3-PHASE SETTING ....................................... 3-22
FIGURE 3-4 OPERATION OF OUTPUT SELECTOR IN GROUND FAULT SETTING ................................ 3-23
FIGURE 3-5 OPERATION OF OUTPUT SELECTOR IN SHORT CIRCUIT SETTING ................................ 3-23
FIGURE 3-6 OUTPUT WAVEFORM WITH SETTING OF V1: 0 ﾟ, V2: 120 ﾟ AND V3: 240 ﾟ ................ 3-27
FIGURE 3-7 1LG SETTING ...................................................................................................... 3-28
FIGURE 3-8 2LS SETTING ....................................................................................................... 3-29
FIGURE 3-9 OPERATION OF PSW MODE .................................................................................. 3-34
FIGURE 3-10 OPERATION OF CHATTERING CORRECTION FUNCTION .......................................... 3-36
FIGURE 3-11 OPERATION OF HOLD-QUICK-CHANGE WHEN THE AUTO-RETURN OF THE TIMER MENU IS[ON] ................................................................................................................... 3-39
FIGURE 3-12 OPERATION OF HOLD-QUICK-CHANGE WHEN THE AUTO-RETURN OF THE TIMER MENU IS[OFF] ................................................................................................................. 3-39
FIGURE 3-13 OPERATION OF NON-HOLD QUICK-CHANGE ......................................................... 3-40
FIGURE 3-14 MEASUREMENT DETAIL OF INTERVAL, ONE-SHOT AND TRAIN .......................... 3-41
FIGURE 3-15 MEASUREMENT DETAIL OF SEP.TIMER ............................................................... 3-41
FIGURE 3-16 TIMER MEASUREMENT VALUES WHEN THE TRIP INPUT CHATTERING CORRECTIONFUNCTION IS [ON] ................................................................................................. 3-43

FIGURE 3-17 OPERATION OF FAULT-DURATION ......................................................................... 3-44
FIGURE 3-18 TYPICAL QUICK CHANGE START TIMING WHEN PRE-TRIGGER TIME AND FAULT START
PHASE ARE [ON] ................................................................................................... 3-46

FIGURE 3-19 OPERATION OF SIMULTANEOUS OPERATION/RECOVERY MEASUREMENT MODE ......... 3-47
FIGURE 3-20 OPERATION OF SEARCH SWEEP .......................................................................... 3-53
FIGURE 3-21 OPERATION OF DSK SEARCH SWEEP .................................................................. 3-55
FIGURE 3-22 OPERATION OF FREQUENCY RELAY TEST MODE .................................................... 3-57
FIGURE 3-23 SETTING EXAMPLE OF EACH STEP IN SOR TEST MODE (VECTOR DIAGRAM) ............. 3-59
FIGURE 4-1 MASTER/SLAVE POWER CONNECTION ...................................................................... 4-3
FIGURE 4-2 CONNECTION OF A DAISY-CHAIN MASTER/SLAVE CONTROL SIGNAL CABLE ................... 4-4
FIGURE 4-3 PERFORMANCE OF TRIP PHASE SELECTION FUNCTION .............................................. 4-6
FIGURE 4-4 CONNECTION DIAGRAM FOR INDIVIDUAL PRE-TRIGGER TIME AND FAULT START PHASE
SETTING IN 4705A ............................................................................................... 4-12

FIGURE 4-5 OPERATION WHEN THE PRE-TRIGGER TIME AND THE FAULT START PHASE ARE SETINDIVIDUALLY IN 4705A ........................................................................................ 4-13

RX4718Wv

FIGURE 4-6 CONNECTION DIAGRAM FOR SIMULTANEOUS QUICK CHANGE WITH 4705A ................. 4-14
FIGURE 4-7 OPERATION FOR SIMULTANEOUS QUICK CHANGE WITH 4705A ................................. 4-15
FIGURE 5-1 INTERFACE CONNECTOR ......................................................................................... 5-3
FIGURE 5-2 HANDSHAKE TIMING CHART..................................................................................... 5-4
FIGURE 5-3 DATA TRANSMISSION EXAMPLE ................................................................................ 5-5
FIGURE 5-4 SYNTAX OF PROGRAM CODE ................................................................................. 5-10
FIGURE 5-5 STATUS BYTE ...................................................................................................... 5-11
FIGURE 5-6 REMOTE/LOCAL BEHAVIOR .................................................................................... 5-14
FIGURE 6-1 RS-232C CONNECTION .......................................................................................... 6-2
FIGURE 6-2 CONNECTION WITHOUT MODEM ............................................................................... 6-3
FIGURE 6-3 MUTUAL CONNECTION EQUIVALENT CIRCUIT ............................................................. 6-3
FIGURE 6-4 CONNECTOR ON CONNECTION CABLE ...................................................................... 6-6
FIGURE 6-5 CONNECTOR OF DATA CIRCUIT-TERMINATING EQUIPMENT .......................................... 6-6
FIGURE 8-1 CONNECTION OF POWER MULTIMETER (2721) AND LOAD ........................................... 8-5
FIGURE 8-2 CONNECTION OF A DISTORTION RATE METER AND LOAD ............................................. 8-6
FIGURE 8-3 CONNECTION OF A UNIVERSAL TIMER (FREQUENCY ACCURACY) ................................. 8-6
FIGURE 8-4 CONNECTION OF A UNIVERSAL TIMER (TIMER ACCURACY) .......................................... 8-7
FIGURE 9-1 OUTPUT VOLTAGE CHARACTERISTICS IN THE 125V RANGE OF VOLTAGE OUTPUT ......... 9-3
FIGURE 9-2 EXTERNAL DIMENSIONS ........................................................................................ 9-19

RX4718W

vi

Table List
TABLE 2-1 CONFIGURATION ...................................................................................................... 2-2
TABLE 3-1 LIST OF INITIAL VALUES OF PANEL SETTING ............................................................. 3-16
TABLE 3-2 LIST OF VOLTAGE OUTPUT RANGE ............................................................................ 3-18
TABLE 5-1 MULTI-LINE INTERFACE MESSAGES ............................................................................ 5-7
TABLE 5-2 PROGRAM CODE LIST ............................................................................................. 5-17
TABLE 6-1 TYPES AND THEIR EXPLANATION OF RS-232C ............................................................ 6-7
TABLE 7-1 LIST OF ERROR MESSAGES WHEN THE POWER IS TURNED ON ...................................... 7-2
TABLE 7-2 LIST OF ERROR MESSAGES IN NORMAL OPERATION ..................................................... 7-2

RX4718W

vii

1. General Description

1.1
1.2
1.3
1.4

RX4718W

Overview ························································ 1-2
Features ························································· 1-2
Function list ····················································· 1-3
Principle of operation········································· 1-6

1-1

1.1 Overview

1.1

Overview

The “RX4718W

V3 Protective Relay Tester” is the test equipment to test protective relays used in the

power stations and substations, etc.
The RX4718W is a small, light and multi-function protective relay tester combining a digital direct synthesis
type synthesizer, 3-phase constant voltage output amplifier and microcomputer.
Quickly changing or sweeping the output frequency, output amplitude or output phase of a single RX4718W
unit makes it possible to measure its operation time (dynamic characteristics) and operation values (static
characteristics) of a protective relay.
The RX4718W comes with an RS-232C and GPIB allowing a personal computer to externally control themfor automatic measurement of the protective relay.
The power supply voltage is 85V to 115V or 180V to 240V. It also uses a power factor improving circuit ascountermeasures against current harmonics, allowing use of the product with low current consumption.
Our protective relay testers include model name that contains two or three alphabets at the beginning of thename such as REX4707A and RX4717W and those 4707A without alphabets. The model, which contains thesame 4-digit number and one alphabet following the number, has the same specifications.
The following protective relay testers belong to the same RELAY EXPRESS series that allow connection as
master-slave links. They are hereinafter called “this series”.
4707, 4707A, REX4707A, 4708, 4708A, REX4708A, 4709, 4709A, REX4709A, 4710, 4710A, REX4710A,
RX4717W, RX4718W, 4722, REX4722, REX4723, 4741, REX4741, As518
This series also include the following current output amplifiers even though they don't have control function
by master-slave links. 4731, REX4731, As535

1.2

Features

Small (JIS rack size), light (19kg)



3ch voltage-outputs (range of 40V, 125V, 250V respectively) in a single unitA built-in timer allows the single RX4718W unit to measure dynamic characteristics.

High-accuracy panel display of the output amplitude/phase and set-values allows the single RX4718W
unit to measure static characteristics



A built-in 10Hz to 200 Hz synthesizer allows a single RX4718W unit to measure frequency relays.

A built-in synthesizer with harmonic generation capability allows a single RX4718W unit to measureharmonic relays.

Allows operation of Step-Out Relays.



Master/slave connection is possible with a single cable, facilitating multi-phase implementation.



32 settable built-in memories facilitates calling up of set values.

Standard equipment of the GPIB and RS-232C allows control by a computer.



Use of a power factor improving circuit for the power supply reduces current harmonics with low current
consumption.

Allows quick change or operation in synchronization with the 4705A

RX4718W

1-2

1.3 Function list

1.3

Function list

■ Amplifier
Completely isolated (withstand voltage: 500Vrms) 3-phase voltage outputs (3 ranges of 40V, 125V and
250V).
■ Output
Front terminals
Side terminals (3-phase 4-wire connectors for 1L and 2L)
3-phase (1L, 2L), ground fault (voltage 1→1L, voltage 3→2L), short-circuiting (voltage 1→1L, voltage
3→2L)■ Output On/Off
Individual On/Off
All of output On/Off all together(this function is enabled/disabled by the internal dip switch)■ Amplifier input signal selection
Internal
External output(in case that the booster is used for the external output signals.)■ Frequency mode selection
Internal (10.000-200.000Hz), 50Hz fixed, 60Hz fixed, line synchronization, external synchronization■ Waveform selection
Sine wave, harmonic-1 (up to order 25), arbitrary waveform, +DC/-DC (this function is enabled/disabled by
the internal dip switch)■ Amplitude and phase (normal value, fault value, and for SOR quick change mode, step 2 value
and step 3 value are set)
Amplitude setting: voltage: 0.000-250.00V
Phase setting: voltage are set as 0 to 359.9 ﾟ respectively (in case of the negative setting for phase isavailable, -359.9)■ Master/slave
Separate, master, slave
Operate on/off of communication function of changer (synchronization of the output changer atmaster or slave).
Trip phase selection (effective when 4741 is master, select the trip phase in total test mode)

RX4718W

1-3

1.3 Function list

■ Operation mode
Manual mode: (quickly changed by the normal and fault instruction key on the front panel. The timer does
not operate.)
Quick change mode: (quick change control function and timer function is valid.)
Hold quick change: (simulation of permanent fault, the output of fault value is held after quick change.)
Non-hold quick change: (simulation of arc fault, normal⇔fault are occurred always synchronized withtrip signal.)
Simultaneous measurement mode of operation and recovery:(operation/recovery time is measured simultaneously)
Sweep operation: (total of 9 types: 3 modes of normal, 1LG and 2LS, 3 different sweeps modes are available
in each mode)
Sweep: (single sweep, and manual sweep by modify is available.)
Search sweep: (operation points of digital protective relays are measured by plural sweeps.)
DSK search sweep: (operation points of disk protective relays are measured by plural sweeps of thespecified number of times.)
95 test mode: (test of frequency relay)
SOR quick change mode: (test of Step-Out Relay)■ Quick change control function (valid when the operation mode is quick change mode.)
Quick change start phase (quick change occurs at the phase set with respect to internal reference phase).
setting range:

0-359.9 ﾟ,

On/Off of the function is available.

Pre-trigger time (quick change starts after the setting time from quick-change-start-command.)setting range:

10-6000ms,

On/Off of the function is available

Fault duration (forced to normal value after the setting time elapsed from quick change start.)
setting range:

0.001-65.000s,

On/Off of the function is available■ Time function (valid when the operation mode is quick-change mode)
Timer mode
Interval : (measures the time from the start of a quick change to the trip-signal)
One-shot : (measures the operation width of a trip-signal)
Train: (measures the total time of operation width of a trip-signal)
Start measurement: (measures the time from the start signal to the trip-signal)
Timer setting
Timer clear
Auto:(the timer value is automatically cleared when quick change operates.)

Manual:(the timer value is cleared by pressing Clear key.)

AutomaticON:(return to the normal value by the trip signal.)

OFF:(not return to the normal value by the trip signal. The fault value is retained)

RX4718W

1-4

1.3 Function list

■ Trip input
Logic setting of the trip signal is available.
Chatter removal time setting for the trip signal is available.
setting range:

1-100ms,

On/Off of the function is available.

■ Operation start input
Logic setting of the operation start signal is available.
Stop setting (the output is recovered to the normal value with recovery of the operation-start-signal.)
Use/disuse setting of the function is available.
■ Extended external response input
The trip-input can be extended up to 255 channels using the optional expansion box.
54 on the front panel)■ PSW (Push SWitch) mode (function of the fault-command-key of ○Alternate -------(the fault status is retained once it is pressed),
Momentary---- (fault status when pressed, and normal status when released)■ Beep sound setting
On/Off■ Panel-SETTING / DATA memory
Read, write, comment input, readout of 50Hz/60Hz initial value■ Interface
GPIB, RS-232C

RX4718W

1-5

1.4 Principle of operation

1.4

Principle of operation
fault control

GPIB

Quick change command input

RS-232

Quick change command delay output

Quick change

Quick change command direct output

Controller

Pre-trigger output

CPU

Operation start input＆

Trip input

Timer

Key, display

Extended external response input

Master/slave
Control unit

Parallel control signal
Parallel control signal

Oscillator

Freq synch input
Freq synch output

U
Voltage out 1
V

Voltage amplifier 1

Voltage 1
OutputIsolation power source

Output selector
U
Voltage out 2
V

Voltage amplifier 2

Voltage 2
OutputIsolation power source
U
Voltage out 3
V

Voltage amplifier 3

Voltage 3
OutputIsolation power source
To CPU
Main power source
Power ON/OFFA
CommonshortswitchB

RSTN
Voltage out
1L

INPUT SELECTLine filter

AC
OUTLET～LINE

L N GND～LINE

Figure 1-1 Block diagram

RX4718W

1-6

RSTN
Voltage out
2L1.4 Principle of operation■ CPU
CPU controls the overall operation of the RX4718W. In the event of power interruption the RAM retains thecontent with a battery and the values set at the last shutdown are called up when the power is turned on.
■ Quick change controller and timer
A TRIP INPUT signal and START INPUT signal are isolated and applied into the quick change control
where these signals are subjected to normal/fault quick change control.
The timer measures the operation time under the control of the quick change controller.
■ Master/slave control unit
Quick change operation and synchronization of output frequency between the master and slave arecontrolled.
■ Oscillator
The oscillator uses a digital direct combination type synthesizer (DDS). The DDS allows setting the
waveform, amplitude and phase individually, and in the quick change operation the signal waveform withhigh degree of freedom can be created by the settings.
■ Voltage amplifier
The voltage amplifier output is isolated from line input, enclosure, input signal and each other.
■ Output changer
There are output terminals on the front panel and side panel of the unit.
The voltage amplifier output signals are led to output-terminals that are set by output setter.
■ Main power supply
The main power supply supplies the necessary power to the CPU and isolation power supply of each
amplifier. It uses a power factor improving type converter to improve the power factor.

RX4718W

1-7

2. Preparation before use

2.1
2.2
2.3
2.4

RX4718W

Check before use ············································· 2-2
Installation location ··········································· 2-3
Setting of internal dip switch ······························· 2-4
Grounding and power supply ······························ 2-5

2-1

1.4 Principle of operation

Check before use■ Safety check
Read the following items in the operation manual before use to secure the safety of users.


Safety precaution (described in the beginning of this operation manual)

2.3 Grounding and power supply■ Unpacking and repacking
Make sure that there is no damage caused by accidents during transportation.
Check the name and number of accessories listed below before installing the instrument.

Table 2-1 Configuration
Item

Quantity
1
1●RX4718W unit
●Operation manual●Accessories
Power cable (one-end arrow type crimp-style terminal)
Power cable (with one-end 100V receptacle)
3-pin-to-2-pin conversion adapter
Daisy-chain power cable
3-phase 4-wire voltage output cable
Master/slave daisy-chain control signal cable
External signal cable (BNC-banana chip)
Accessory cable bag

1
1
1
1
2
1
3
1

When repacking the equipment for purpose of transportation, make sure to insert the cushioning materials
sufficient to support the weight in the box with the appropriate strength and room in order to protect theequipment sufficiently.

RX4718W

2-2

2.1 Installation location

2.1

Installation location■ Installation location
Place the equipment so that four rubber legs of the bottom or the back are secured on the flat surface such asa table.
The weight of each unit is approximately 19kg. Install it on a strong and flat place bearing the total weight.
！

CautionWhen using two or more of equipment in this series piling one atop another, the structural limit is 4
units or less.

■ Conditions of installation location


Install where the temperature and humidity meet the following allowable ranges.
・Performance guarantee: +15 to +35℃, 5 to 85%RH (no condensation)
・Operation guarantee : 0 to +40℃, 5 to 85％RH (no condensation)
・Storage condition: -10 to +50℃, 5 to 95％RH (no condensation)

This equipment uses fans for the cooling.
・The air inlets/outlets are located on the right and left sides.
Secure a space by at least 10cm from the wall, etc. for ventilation.
・When you notice that the fans are stopped,
Cut power off immediately and inform us or our distributors. Using the equipment with the fansstopped may worsen the damage to make the repair harder.



Avoid installing the equipment in the following locations.
・Where excessive noise is included in the commercial power source.
If excessive noise is included in the commercial power source, noise is superposed on the output
signals to make the specification less reliable. Use the commercial power source with less noise.
・Where flammable gas exists.
The risk of explosion is involved in such places. Never install or use the equipment in such places.
・Outside, where the equipment is exposed to direct sunlight, and near fire or heating sources.
Installing in such places may deteriorate the performance or cause malfunction of the equipment.
・Where corrosive gas, water, dust, metal powder and salt content exist and the place with highhumidity.
Installing in such places may cause corrosion or malfunction of the equipment.
・Near the source of electromagnetic field, high-voltage equipment, power lines and the source of pulse
noise
Installing in such places may cause malfunction.
・Where vibration frequently occurs
Installing in such a place may cause mal-operation or malfunction.

RX4718W

2-3

2.2 Setting of internal dip switch

2.2

Setting of internal dip switch

This equipment contains the mode that outputs the DC voltage to test the DC relay. It also contains thefunction enabling to turn on and off the all output-signals at once to improve the operation ability.
Such functions can broaden the range of application for this equipment, but some may involve risks
depending on the usage and be unnecessary in many cases. Therefore, enabled/disabled setting of thesefunctions can be selected individually by setting the internal switch.
The factory setting is “disable” for DC output and “enable” for output ON/OFF function.
To change this setting, remove the top cover and change the dip switch setting on the top of the PCB
indicated below.

Warning！

Be sure to remove the power cable when removing the top cover.
This equipment contains some high-voltage parts. Never touch any other parts except forthe dip switch.

The internal dip switch is set as shown below. Change the setting if necessary.

8

7

6

5

4

3

2

1

ON sideOFF side

Front panel

No

Description

1
2

When the equipment is a master, all-output-ON-control-signal
is sent to the slave.
All-output-ON-operation of this equipment

3

Wave select +DC/-DC function

4

When Amplifier output on/off key is OFF, signal amplitude ofexternal signal output terminal set to "0Vrms"
Unused5-8

Setting detail: *indicates thefactory setting.
ON side : (disable)*OFF side : (enable)
ON side : (disable)*OFF side : (enable)*ON side : (disable)
OFF side : (enable)*ON side : (disable)
OFF side : (enable)*OFF

Figure 2-1 Setting of internal dip switch

RX4718W

2-4

2.3 Grounding and power supply

2.3

Grounding and power supply■ Grounding！

Warning

Since the unit includes a built-in power line filter, there is risk of electric shock if usedwithout grounding.
To prevent electric shock, securely connect the equipment to a ground providing a
resistance to ground of 100 ohms or less according to the electrical installation technicalstandard.
 When the supplied power cable with 100V receptacle is used, connect the 3-conductor
power cable to the grounded 3-terminal wall socket.
When the 3-pole-to-2-pole conversion adaptor is used for the 3-terminal wall socket,
connect the grounding wire (green) of the conversion adapter to the grounding terminal
next to the receptacle.
 When the supplied power cable (one-end is arrow type crimping terminal) is used,ground the grounding wire (green).
 Connect the grounding terminal on the left side panel by the wire of 2mm2 or greater.

■ Power supply！

Caution

Before connecting the power supply, check that the line voltage meets the rated power
supply voltage of the equipment.

The power supply specification of the RX4718W is as shown below.
Voltage

AC85V-115V, AC180V-240V

Frequency

48Hz-62Hz

Maximum electric power consumption

800VA

Use the supplied power cable to supply the power to the equipment. Terminals on the left side are provided
for emergency at the site where the equipment is transported and the supplied power cable is not available.
Supplying the power to the terminals can operate the RX4718W. When using this terminals, set aslide-switch position to the terminal position.
！

Warning

Note that this terminal is for emergency use only.
Since there is danger of causing electric shock, etc., avoid using this terminal all the time.

RX4718W

2-5

2.3 Grounding and power supply

Connect the supplied power cable,
set the slide switch to theconnector position.
In case of the one-end arrow typecrimping terminal
White: L
Black: N
Green: Grounding wire
Supplied power cableSet the power slecting slide switch to
the terminal position
when using the terminal.

L
AC100V or 200V
N

Protective earth

Figure 2-2 Connection of power cable
The RX4718W has a power output connector connecting in parallel with the power input. When two or moreunits of this series are used, use the supplied daisy-chain cable and connect the power output connector of
the RX4718W to the power input connector of other equipment.
L

①

②
③

N

②

GND
protective earth～INLET①③

AC OUTLET

Figure 2-3 Pin connection of power input connector and power output connector！

CautionThe maximum current capacities of the power input connector and the power output
connector are 15A. Use under the range of capacity.

RX4718W

2-6

2.3 Grounding and power supply

3. Description of Panel Controls andBasic Operation
3.1
3.1.1
3.1.2
3.2
3.2.1
3.2.2
3.3
3.3.1
3.3.2
3.3.3
3.3.4
3.4
3.4.1
3.4.2
3.4.3
3.5
3.5.1
3.5.2
3.5.3
3.5.4
3.5.5
3.5.6
3.5.7
3.5.8
3.6
3.6.1
3.6.2

RX4718W

Name and function of each part of the panel ···········3-2
Left side panel··················································3-3
Right side panel················································3-6
Start ····························································· 3-14
Power on ······················································ 3-14
Initial setting ·················································· 3-15
Operation of amplifier output ····························· 3-18
Setting of output range ····································· 3-18
Output ON/OFF ·············································· 3-19
Operation at overload ······································ 3-19
Output selector ··············································· 3-20
Output signal setting ········································ 3-24
Frequency setting ··········································· 3-24
Setting of amplitude and phase ·························· 3-25
Waveform selection ········································· 3-32
Operation mode ·············································· 3-34
Trip input and operation start input ····················· 3-35
Operation of manual mode································ 3-38
Operation of quick change mode ························ 3-38
Simultaneous operation/recovery measurementmode ···························································· 3-47
Operation of normal sweep ······························· 3-48
Operation of Search / DSK-Search sweep ··········· 3-51
Operation of 95 relay test mode (frequency relay) · 3-57
Operation of SOR quick change mode
(Step-out Relay) ············································· 3-59
Other basic operation ······································ 3-60
Other function ················································ 3-60
Panel setting memory ······································ 3-62

3-1

3.1 Name and function of each part of the panel

3.1

Name and function of each part of the panel

This manual uses the following indications.
Names on the keys and function names indicated on the key top：

GPIB LOCAL、MEMORY No
Names of the function indicated in orange under the key
OTHER FUNC、READ
Names of LED (excluding the keys with LED) ：<Over>、<Trip signal>
Some names in the fluorescent display ：【SETTING / DATA】、【Operation mode】
Display on the fluorescent display：[ROM CHECK ERROR]、[Sine wave]

RX4718W

3-2：

3.1 Name and function of each part of the panel

3.1.1

Left side panel⑫① ② ③ ④

⑤

⑥

⑦

⑧

①-④ TRIP INPUT(floating)

⑨

⑩

⑬

⑪

“3.5.1 Trip input and operation start input“This terminal receives operation-signal-input of a protective relay.
1 to ○
3 : voltage input, the lower side terminal of ② is
The maximum allowable voltage is +130V DC. (○common) )The withstand voltage to the chassis is 354V peak (250Vrms).
① Threshold voltage of +50V terminal
High level: +50.0V
Low level: +40.0V② Threshold voltage of +8V terminal

High level: +8.0V
Low level: +5.0V③ Threshold voltage of +2.5V terminal

High level: +2.5V
Low level: +1.0V④ are input terminals with the open-circuit voltage of +5V and the short-circuit current of 10mA for acontact.

⑤⑥ START INPUT (floating)“3.5.1 Trip input and operation start input“This terminal receives the signal input to start the quick change/sweep operation externally.
The withstand voltage to the chassis is 354V peak (250Vrms).
⑤ can receive voltage-input with the allowable maximum input voltage of DC+130V.
Threshold voltage
High level: +2.5V
Low level: +1.0V⑥ are input terminals with the open-circuit voltage of +5V and the short-circuit current of 10mA for acontact.
RX4718W

3-3

3.1 Name and function of each part of the panel！

Caution

6 ), or the contact input circuit may be
Don't apply the voltage to the contact input( ④ and ○damaged.

Quick change command (Fault control)⑦ INPUT (Chassis potential)“4.4.2 Synchronization of quick change operation“

These terminals is used for inputting signals to externally control the normal/fault-output of RX4718W.
Although this signal turns the output to normal or fault state, it does not trigger the timer.
The input signal must be a TTL level signal of 0 or 5V.
TTL level signal of 0V turns the output signal to the fault state.
Threshold voltage
High level: +2.5V
Low level: +1.0V
The allowable maximum input voltage
DC+130V⑧ DELAY OUT (Chassis potential)“3.5.3 Operation of quick change mode“

Output signal of TTL level of 0 or 5V is output when the output status of REX4708AW changes quickly.
Output signal becomes Low of logic when the output of REX4708AW is in a fault state.
It is used to control the normal/fault condition of 4705A, etc. simultaneously.

⑨ DIRECT OUT (Chassis potential)“3.5.3 Operation of quick change mode“

5 ,○6 , or command key○54 ) is applied.
This is a signal that changes just after operation command (start-input○
It is a TTL level signal and becomes Low when in a FAULT condition.
9 Direct-out becomes
When the fault delay time (pre-trigger time) and the fault start phase has been set, at first ○Low, and after the fault delay time elapses, amplifier output turns fault state from normal state at the timing of

the fault-start-phase, and ⑧(Quick-change-command-)Delay-output becomes Low.
⑩⑪ PRE-TRIGGER OUT“3.5.3 Operation of quick change mode“

These terminals outputs signal (TTL level, contact) to activate the oscilloscope.
The signal becomes Low on quick change start-command.
The signal returns to High 0.1 second after the output returns to normal state.
⑩ is TTL level signal (chassis potential), and ⑪ is a contact signal (floating).
⑪contact signal has the withstand voltage to the chassis is 354Vpeak (250Vrms).
⑫ GPIB (Chassis potential)“5.1.1 GPIB specifications“This is a connector to control GPIB.
⑬ RS-232C (Chassis potential)“6.2.2 Connector and signal line“This is a connector to control RS-232C.

RX4718W

3-4

3.1 Name and function of each part of the panel⑭⑮⑭ AC OUTLET (floating)⑯⑰⑱“2.3 Grounding and power supply“This is an output connector connected in parallel with the power input of the RX4718W.
The withstand voltage to the chassis is 2121Vpeak (1500Vrms).
When two or more units of this series are used, use the supplied daisy-chain cable to connect with the power
input connector of other equipment.
⑮ ～ LINE (POWER INPUT) (floating)“2.3 Grounding and power supply“This is the connector for power input. The withstand voltage to the chassis is 2121Vpeak (1500Vrms).
The supplied power cable is used. When this connector is used, set the input switching slide switch to thisconnector side.
⑯⑰ ～ LINE (floating)“2.3 Grounding and power supply“

Use this power input terminal when the supplied power cable is missing.
The withstand voltage to the chassis is 2121Vpeak (1500Vrms).
When this terminal is used, set the input switching slide switch to this terminal side.
⑱ GND (grounding terminal)“2.3 Grounding and power supply“This is the protective grounding terminal which is connected to the chassis.
！

Warning

Power input terminals of ⑯ and ⑰ are for emergency. Avoid using them all the times
because of the risk of electric shock.
Always ground to be safe.

RX4718W

3-5

3.1 Name and function of each part of the panel

3.1.2

Right side panel
⑲⑳

39
◯

27 ◯
28 ◯
29
◯

⑲

VOLTAGE OUT 1L (floating)“3.3.4 Output “This is a connector of the voltage output 1L side. When setting of the output selector is 3-phase 1L, the selectedmode becomes 3-phase 4-wire connection.
When setting of the output selector is a single phase, the " voltage-out-1 " is selected.
The withstand voltage to the chassis is 707 Vpeak (500Vrms).
⑳

VOLTAGE OUT 2L (floating)“3.3.4 Output “This is a connector on the voltage output 2L side. When setting of the output selector is 3-phase 2L,
the selected mode becomes 3-phase 4-wire connection.
When setting of the output selector is a single phase, the " voltage-out-3 " is selected.
The withstand voltage to the chassis is 707 Vpeak (500Vrms).
39◯

COMMON SHORT SWITCH“3.3.4 Output “This is a switch connecting the commons of voltage-output-2 and 3 to that of voltage-output-1.
This setting becomes enabled when the front terminal is used, and disabled when the side terminal is used.
Switch A: between voltage-output-2 and 1
27 ◯
28 ◯
29 EXT SIG OUT (chassis potential)◯

Switch B: between voltage-output-3 and 1“4.2 Amplifier input signal selection“"OUTPUT" is the signal output terminal that the internal synthesizer signal is output.
The range full scale output level is 1Vrms.
This signal is used when the amplifier-input-selection is the external output setting to drive the external
amplifier.

RX4718W

3-6

3.1 Name and function of each part of the panel
25 ◯
26
◯

36
◯

37
◯

34
◯

25 ◯
26 PARALLEL CONTROL SIG (chassis potential)◯

35◯“4.1.2 Master/slave connection“

25 and ◯26 are connected in parallel.
This is a connector connected for master/slave operation. ◯36 EXT RESONSE INPUT (floating)◯“4.3 Operation of extended response input“This is the connector connecting the expanded response input box (optional) to expand the trip input up to 255
channels. The input of the expanded response input box must be connected to the trip input of ① to ③
37 threshold voltage. The withstand voltage of the response input terminal is 354Vpeak
according to the ◯(250Vrms) against the chassis. (The logic control terminal is a chassis potential.)
37 THRESHOLD VOLTAGE◯“4.3 Operation of extended response input“

36 expanded external response input.
This is a switch to set the threshold voltage for the response input of ◯34 FREQ SYNC SIG IN (chassis potential)◯“3.4.1 Frequency setting“This is a signal input to bring the frequency of RX4718W into synchronization with the external signal and used
when the frequency mode is the external sync setting.
The falling edge of TTL level signal will have a phase of 0.
The allowable maximum input voltage is DC±30V.
Threshold voltage
High level: +2.5V
Low level: +1.5V
35 FREQ SYNC SIG OUT (Chassis potential)◯“3.4.1 Frequency setting“This outputs the internal frequency of RX4718W.
The falling edge of TTL level signal will have a phase of 0.

RX4718W

3-7

3.1 Name and function of each part of the panel

3.1.3

Front panel

40
◯

41
◯

42
◯

43
◯

44
◯

45
◯

46
◯

47
◯

RX 471740 POWER ON/OFF◯

This is a power supply switch. It also works as a non-fuse breaker (NFB) to shut off the power if too muchcurrent flows, or when the internal temperature extremely rises.
41 SHIFT◯

In order to use the function marked in orange below each button, press this SHIFT key to turn on the LED ofSHIFT key before pressing the button for the desired function.
Example of key input display for SHIFT
42 OUTPUT (selection)◯→

SHIFT+OTHER FUNC

“3.3.4 Output “

FRONTThe amplifier output is output to the output terminal on the front panel.
SIDE
The amplifier output is output to ⑲VOLTAGE OUT 1L and ⑳VOLTAGE OUT 2L on the right side panel,
47 "OUTPUT SELECTOR" key becomes valid.
and ○

！

CAUTION44 ○45 ○46 VOLTAGE OUT can be used as monitor terminal,
For SIDE, the output terminal of ◯but no load can be connected.

RX4718W3-8

3.1 Name and function of each part of the panel
43 ALL OUTPUT◯

This is a key to allow all the amplifier outputs to be turned on and off at once.

44 ◯
45 ◯
46 VOLTAGE OUT◯“3.3.4 Output “
OUT U - V (floating)
These are the amplifier output terminals on the front panel.
The withstand voltage to the chassis is 707Vpeak (500Vrms).
The maximum output voltage is 250V.
Take great care of handling it.
<OVER>“3.3.3 Operation at overload“This LED illuminates when overloading.
OUTPUT ON/OFF
ON/OFF key sets on and off independently.
RANGE

40V、125V、250V<ON> LED lights up when the output is on.
“3.3.1 Setting of output range“

These are the setting keys for the output range.
The LED of the range key selected will be turned up.
47 OUTPUT SELECTOR◯“3.3.4 Output “

GROUND FAULT､SHORT CIRCUIT
When the selector mode is a single phase, push the GROUND FAULT key or SHORT CICUIT key for the
output connection. " Voltage-out-1 " and " Voltage-out-2 " signals are connected to Voltage out 1L and
Voltage out 2L connecter pins respectively according to Ｒ､Ｓ､Ｔ key setting.
See Fig3-4 and Fig3-5.
SHIFT+1L : the Voltage out 1L connecter is available when 3-phase setting..
SHIFT+2L : the Voltage out 2L connecter is available when 3-phase setting.
SHIFT+SELECTOR MODE displays the selector mode on the【SETTING / DATA】display.

RX4718W

3-9

3.1 Name and function of each part of the panel

50
◯

52
◯

51
◯

53
◯

54
◯

55
◯

58
◯

50 (STATUS DISPLAY LED)◯

<HANRMONIC ARBITRARY>This indicates the status of output waveform. It lights up for sine wave and black out for the waveforms otherthan sine wave.
<CHATTERING CORRECT>, <FAULT DURATION>, <PRE-TRIGGER>, <START PHASE>
These light up when the functions are valid.
<TRIP: b>, <START: b>
Logic setting of [TRIP INPUT] and [START INPUT] signal.
This LED lights up when the negative-logic is set.
negative-logic: contact-state is open-circuit / voltage do not be applied
This LED do not light up when the positive-logic is set.
positive-logic: contact-state is short-circuit / voltage is applied<START INPUT>、<TRIP INPUT>
These LED light up when the signal is applied to the input terminal (applying voltage for voltage input,
short-circuit for contact input).
51 TIMER CLEAR◯

This resets the measurement value of the timer counter.
“3.5.3.A Timer“, “3.5.8 Operation of SOR quick change mode (Step-out Relay)“
52 KEY LOCK◯

Pressing this key disables the panel control, and lights up the LED(Except for OUTPUT ALL ON/OFF, each output ON/OFF, GPIB LOCAL, SHIFT+LOCK OFF)SHIFT+LOCK OFF enables the panel control, and lights off the LED.

RX4718W

3-10

3.1 Name and function of each part of the panel
53 PANEL SET◯“3.6.2 Panel setting memory“

MEMORY No
This key specifies the memory number for panel setting. The memory number is displayed on the【 SETTING /DATA】display, and the number can be selected by MODIFY dial.
SHIFT+WRITE, SHIFT+READ
Setting data on the front panel can be stored into the built-in memory, and the stored data in the memory
beforehand is recalled as the panel data.
54 COMMAND key◯“3.5 Operation mode“

NORMAL
This command button is used to set the output signal to normal value.
SWEEP▲
This command button is used to start sweep from the fault value to the normal value when the system is in
sweep mode.
STOP
This command button is used to halt the sweep temporarily when the system is in sweep mode.
SWEEP▼
This command button is used to start sweep from the normal value to the fault value when the system is in
sweep mode.
FAULTThis command button is used to set the output signal to the fault value.
The following operations are available with PSW mode.
MOMENTARY:

returns to the normal value when released.

ALTERNATE:

the fault value remains even when released.
To return to the normal value, press FAULT again or NORMAL.

<ALTERNATE>
This lights up when the PWS mode is ALTERNATE.
55 DATA INPUT◯

Setting select ▲, ▼, ◄, ►This key moves the cursor for selection of item on the fluorescent display.
COARSE◄, FINE►
This key moves the cursor on the digits.
MODIFYThis key increases/decreases numerical value of the digit where the cursor is placed or change the setting.
Numeral buttons ０-９, －,. and CANCELThis key allows direct input of numerical value. Pressing CANCEL cancels the number in the order in which
the number has been input.
ENTER
This key establishes the value input, or the setting has been changed.

RX4718W

3-11

3.1 Name and function of each part of the panel
56 CURSOR ON/OFF◯“4.1.3 B) Simultaneous setting change“This key toggles the indication of the cursor on and off. When the cursor indication is not displayed, the LED
lights up.
60
◯

61
◯

62
◯
60 Upper fluorescent display◯【MODE】The operation mode is displayed. To select the operation mode, use

MODE

62
key of ○【NORMAL FREQ】
The value of the normal frequency is displayed.
【NORMAL VOL 1-3】, 【NORMAL PHASE 1-3】
The normal values of amplitude (upper part), and phase (lower part) are displayed.
【TIMER/SWEEP】
The measurement value of the timer and the sweep position is displayed.
【TIMER MODE/SWEEP TIME】
The timer mode, the timer measurement value and the sweep time are displayed.
61 Lower fluorescent display◯【MASTER/SLAVE】
The status of master/slave function is displayed. Use MASTER / SLAVE
Mode indication: 【MASTER】 【SLAVE】 【SEPARATE】【FAULT FREQ】
The fault frequency is displayed.
【FAULT VOL 1-3】, 【FAULT PHASE 1-3】
The fault values of amplitude (upper part) and phase (lower part) are displayed.
【SETTING / DATA】
This is used to set various functions and display data.

RX4718W

3-12

62 .
key of ○3.1 Name and function of each part of the panel
62 Each setting key◯

GPIB LOCAL“5.2.4 Remote/local behavior“This key cancels the remote condition of GPIB control to enable the panel control when it is a remote control
condition, and the LED lights up.
SHIFT+OTHER FUNC.

“3.6.1 Other function“

In pushing SHIFT+OTHER FUNC

key, the other function is displayed on the【SETTING / DATA】display.

VOL 1“3.5.3.B) Fault duration“Every time this key is pressed, the cursor position shifts as below.
【NORMAL V1】→【NORMAL 1】→【FAULT V1】→【FAULT 1】→【NORMAL V1】SHIFT+FAULT DURATION displays the fault duration on the【SETTING / DATA】display.
VOL 2“3.4.2.0 1LG setting“

Every time this key is pressed, the cursor position shifts as below.
【NORMAL V2】→【NORMAL 2】→【FAULT V2】→【FAULT 2】→【NORMAL V2】.
SHIFT+1LG SETTING displays the 1LG setting on the 【SETTING / DATA】display.
VOL 3“3.4.2. B) 2LS setting“

Every time this key is pressed, the cursor position shifts as below.
【NORMAL V3】→ 【NORMAL 3】→ 【FAULT V3】→ 【FAULT 3】→【NORMAL V3】
SHFT+2LS SETTING displays the 2LS setting on the 【SETTING / DATA】display.
MASTER / SLAVEThis displays the master/slave setting on the 【SETTING / DATA】display.
SHIFT+EXT RESPNS INPUT displays the extended response input on the【SETTING / DATA】display.
“4.1.1 Master/slave setting“, “4.3 Operation of extended response input“
OPERATION MODE

“3.5 Operation mode“, “3.4.1 Frequency setting“This displays the operation mode on the 【SETTING / DATA】display.
SHIFT+FREQ MODE displays the frequency mode on the 【SETTING / DATA】display.
INTERLOCK 3
“3.4.2 A) Balanced 3-phase and Interlock 3-phase “When this key is pressed, the LED lights on and the amplitude or phase of voltage output can be changed in
all three chnnels at the same time using MODIFY. Pressing this key again turns the LED off and cancels thefunction.
SHIFT+ BALANCED 3 allows setting of the balanced three phases, and the phase reference is the output
signal where the cursor is placed.
MANUAL SWEEP
When the operation mode is a "sweep", pressing this key lights the LED on and allows changing the sweep
position manually. Pressing it again turns the LED off and cancels the function.
SHIFT+TRIP INPUT: b selects the trip-input-logic.
“3.5.5 A) Manual sweep“, “3.5.1 A) Setting of [TRIP INPUT] logic“

RX4718W

3-13

3.2 Start

3.2

Start

3.2.1

Power onInstall the RX4718W unit and turn the power on according to 2.1 Installation location and 2.3 Grounding and power
supply.
After turning the power on, the following self-tests are conducted automatically.
Turning on all LED except for <OVER> for testing lamps.
Turning on all of fluorescent display for dot testing.
Software version display
Memory check
If there are no abnormalities, the RX4718W is set to the last settings stored in the memory, because its memory
retains the settings at the last power-off-timing.
Its outputs, however, always stays with off-state for safety reasons.
If RX4718W checks its memory and finds any error, the lower fluorescent display shows either of the following
messages:[ROM CHECK ERROR]This indicates the program memory has error.

[RAM CHECK ERROR]This indicates the RAM has error.

[CHECK SUM ERROR]This indicates the data stored in battery-back upped memory
has error.

[ROM CHECK ERROR] and [RAM CHECK ERROR] means malfunction in RX4718W.
Cut power off immediately, and contact our company or our sales agent.
In the case of check-sum-error, [CHECK SUM ERROR] is displayed for ten seconds or so, then, RX4718W is set toinitial-setting (50Hz) and start to work.
If the battery, which should backup the memory, has been discharged, even then check-sum-error will also occurs.
To fully recharge a completely discharged-battery, it takes about 100-hour energizing.
When the battery is fully charged, the data in memory are retained about 60 days with some variation depending on
the condition of the individual unit and ambient temperature.
A deteriorated battery can retain data for a shorter period.
If the ability of the battery becomes impractical, ask the company for replacement at cost.
If the power is turned off during setting operation, [CHECK SUM ERROR] may occur when the power is turned on
the next time. Therefore, turn off the power one or more seconds after the finish of setting or alternation procedure.
Measures for other errors

RX4718W“7.1Error message“

3-143.2 Start

3.2.2

Initial setting

There are two types of the panel initial setting, which are 50Hz and 60Hz.
The factory setting is 50Hz.

“Table 3-1 List of Initial Values of Panel Setting“This initial setting serves as reset when the current setting is unknown and does not operate well.
The initial setting is established as following.
53 MEMORY No key to display the memory number on the【SETTING / DATA】display.
Press ○
Rotate MODIFY key to set [Memory 32 50Hz INI] or [Memory 33 60Hz INI] on the 【SETTING / DATA】

display.
SETTING/DATA

SETTING/DATAMEMORY 32

MEMORY 33

50Hz INI

60Hz INISETTING/DATA

SETTING/DATA

Press SHIFT+READ key to set the selected initial data.
[MEMORY **] is displayed on the 【SETTING / DATA】display during setting the data.
All outputs of the amplifier are turned off for safety at the time of setting the data.
Memory data of number 32 and 33 cannot be rewritten, but memory data of number 1 to 31 can be rewritten.

RX4718W

3-15

3.2 Start

Table 3-1 List of Initial Values of Panel Setting
Setting parameters
Output range and output control
Output changer mode
Normal / Fault
frequency
Normal / Fault
amplitude
Normal / Fault
phase
Phase setting(＋:lag ,－:lead)

Initial values
40V, OFF
Front terminal
50Hz (memory 32)/60Hz (memory 33)
0V
V1: 0 ﾟV2: 120
V3: 240 ﾟWithout negative sign

Operation mode
Master/slave / Separate
Frequency mode
Waveform selection
Amplifier input signal
Ext-sig-out amplitude

Manual
Separate
50Hz fixed (memory No 32)
60Hz fixed (memory No 33)
Sine wave
Internal,
0V

Output selector single-phase setting
Output selector 3-phase setting

Ground fault,
1L, R

Timer mode
Timer setting: timer clear

Interval
Auto

Timer setting: automatic recovery

ON

Trip input logic
Chattering removal time setting
Expanded response input↑a : RISE
1ms, OFF0

Operation Start signal logic
Stop setting of operation start input↑a : RISE
UnusedFault duration time
Pre-trigger time
Fault start phase1s, OFF
10ms, OFF0°, OFF

Sweep time

100s

RX4718W

3-16

R

3.2 Start

Setting parameters
Operation/recovery fault wait time

0.5s

Initial values

Search / DSK search
Search / DSK search
Search / DSK search
Search / DSK searchnumber of times
judge-time
trip wait time
output cut control

3
0.1s
5.0s
Use

Frequency relay test
Frequency relay test
Frequency relay test
Frequency relay test

cross frequency
sweep rate
hold time
amplitude quickchange control

48.5Hz (memory 32)/58.5Hz (memory 33)
1Hz/s
0.5s
OFF

SOR quick change
SOR quick change
SOR quick change
SOR quick change

step 2, 3 amplitude 0V、0A
step 2, 3 phase0°
step 1 wait time
0.1s
step 2, 3, 4 wait time 0s

Harmonic 1 amplitude
Harmonic 1 phase
Harmonic writing flag

100% (1 degree), 0% (2-25 degrees)0 ﾟ (all degrees)
0 (no computation)

Trip phase selection
Output selection communication

3-phaseOFF

PSW mode

Alternate

Beep sound settingON

RX4718W

3-17

3.3 Operation of amplifier output

3.3

Operation of amplifier output

RX4718W contains 3 voltage-amplifiers which are isolated with the withstand voltage 707Vpeak (500Vrms)
between each output and the chassis.
！

CautionWhen the amplifier outputs are connected in series, make sure that output voltage does not exceed
the withstand voltage to the chassis. When the RX4718W is used with the voltage exceeding thewithstand voltage, malfunction or damage to the equipment may occur.
The RX4718W can be used up to 500Vrms with 2-output series connection but can not used over
500Vrms with 3-output series connection.
Parallel connection is not available for the voltage output. If connection is made accidentally,
malfunction or damage to the equipment may occur.

！

Warning

The maximum output voltage of the voltage amplifier is 250V.
Pay extreme attention to handling the amplifier to avoid the hazard of electric shock.
Always turn the output off when connecting wires to the output terminal.

3.3.1

Setting of output range

The output range includes 40V, 125V and 250V, and the rated load and the preset resolution for each range is asfollows in AC mode (sine wave, harmonic 1 and arbitrary) and DC mode (+DC and –DC).
Table 3-2 List of voltage output range
Range: AC
250V (0.00V-250.00V)
125V (0.00V-125.00V)
40V (0.000V-40.000V)

Rated load:
AC
1250Ω
156Ω
200Ω

Range: ±DC
250V (0.0V-250.0V)
125V (0.0V-125.0V)
40V (0.00V-40.00V)

Rated load:
DC
2500Ω
1250Ω
400Ω

44 ,◯
45 ,○
46 is pressed and the LED of the key lights
The output range is set when a setting key for the output range ◯up. The output range can be set for each output.
When range setting is changed, the amplitude of the amplifier output turns to 0V, and the amplifier output isdisconnected from the output terminals.

RX4718W

3-18

3.3 Operation of amplifier output

3.3.2

Output ON/OFF

Output ON/OFF control has two types:[OUTPUT]

44 /○
45 /○
46 : each outputs turn ON/OFF individually according to the each key
ON/OFF key of ○setting

43 key[ALL OUTPUT] ON/ OFF ○: all outputs turn ON/OFF all together.

44 ○
45 ○
46 ) is lighting.
Output signal go on outputting when <ON> LED (at the left side of ON/OFF key of ○
44 ○
45 ○
46 is pressed during the output-ON-state, the output is turned to OFF-state and theWhen ON/OFF key of ○<ON> LED turns off.

43 [ALL OUTPUT] ON - OFF key-operation may be dangerous if not operated properly, so ○43 [ALL OUTPUT]○

ON - OFF key-operation can be set to be enabled / disabled by the internal dip switch.
“2.2 Setting of internal dip switch“

3.3.3

Operation at overload

44 ○
45 ○
46 <OVER>LED of the output where the overload occurs lights up.
When overload occurs, ○If the overload status lasts for three seconds or longer, buzzer sounds longly and the output is automatically turned

OFF as well as the output amplitude is set to zero for safety.

！

CautionWhen the beep sound setting is OFF, the buzzer does not sound even if the overload
occurs. It is recommended to turn ON the beep sound setting.
“3.6.1. A) Beep setting“

RX4718W

3-19

3.3 Operation of amplifier output

3.3.4

Output selector

The output amplifier 1 to 3 outputs the voltage signals according to the setting of the output selector.
The voltage signals are output to the one of output terminal (at the front panel) or connecters (at the right side).
When the voltage output connecter of [VOLTAGE OUT 1L and 2L] on the right side is used, use the 3-phase 4-wirecable supplied.
V1(R)
V2(S)
V3(T)
COM(N)
3-phase 4-wire cable

② ①
⑤ ④ ③
⑥
Voltage out 1L/2L

Figure 3-1 Pin Connection of Voltage Output 1L/2L Connector and 3-phase 4-wire Voltage Output Cable
Output selector

Front terminal

Amp 1

U
Voltage out 1
V

Amp 2

U
Voltage out
2

Amp 3

U
Voltage out
3

Common Short A
Switch

B
R

S

T

R

S

T

② ①
⑤ ④ ③

② ①
⑤ ④ ③

⑥

⑥

Voltage out 1L

Voltage out 2L

Figure 3-2 Configuration of Output Changer
The output selection mode has front terminal and side terminal (voltage output 1L and 2L), and the side terminal has
3-phase mode and single-phase mode (ground fault, short-circuit).
When the output selection mode is changed, the all of 3ch-outputs are turned off for safety.
！

CautionWhen the output selection mode is set to side terminal, the voltage is output to the front terminal
for monitoring but the load can not be connected to the front terminal.

RX4718W

3-20

3.3 Operation of amplifier output

A) Output to Front terminal
42 FRONT key is
The voltage signals of amplifier 1 to 3 are output to U-V terminal on the front panel, and LED of ○turned on. There are two setting procedures as shown below.


42 FRONT key .
Press ○



41 SHIFT+ ○47 SELECTOR MODE to display the selector mode
Press ○SETTING/DATASELECTORon the【SETTING / DATA】display.

FRONT

55 ENTER.
Rotate MODIFY to select [FRONT] and press ○SETTING/DATA

39 A and B on the right side panel are used to connect the common line of theCommon-connect-switch ○voltage-outputs when the output selector is set to the front terminal. This setting is disabled when the side connecter
is used.
42 SIDE key turns LED on and the 3-phase or
After the selector mode has been set to the front terminal, pressing ○single-phase setting selected previously is recovered.

B) Output to Side connecter
42 SIDE key is turned
The voltage signals of amplifier 1 to 3 are output to connecter of 1L or 2L, and the LED of ○on.
Setting procedure

SETTING/DATA

41 SHIFT+○
47 SELECTOR MODE to display the selector mode
Press ○

SELECTORon the【SETTING / DATA】disply.

3 PHASE

55 ENTER.
Rotate MODIFY to select [3 PHASE] and press ○SETTING/DATA

In 3-PHASE mode, output signals are distributed to either connecter of [ 1L ] or [ 2L ]. If the output connection istoggeled between connecter of [ 1L ] and [ 2L ], the output signal is not turned off.
■ Voltage-out-1L setting
47 1L turns < 1L > on, and voltage signals of the voltage amplifier 1 to 3 are output to each pin ofPressing SHIFT+○
voltage-output-1L connector with the following connections.
Voltage amplifier 1 U――――――――→pin-① of voltage output 1L--- R line
Voltage amplifier 2 U――――――――→pin-③ of voltage output 1L--- S line
Voltage amplifier 3 U――――――――→pin-⑤ of voltage output 1L--- T line
Voltage amplifier 1, 2, 3 V――――――→pin-② of voltage output 1L--- Neutral line
■ Voltage-out-2L setting
47 2L turns < 2L > on, and voltage signals of the voltage amplifier 1 to 3 are output to each pin ofPressing SHIFT+○
the voltage-output-2L with the following connections.
Voltage amplifier 1 U――――――――→pin-① of voltage output 2L--- R line
Voltage amplifier 2 U――――――――→pin-③ of voltage output 2L--- S line
Voltage amplifier 3 U――――――――→pin-⑤ of voltage output 2L--- T line
Voltage amplifier 1, 2, 3 V――――――→pin-② of voltage output 2L--- Neutral line
■ Setting of R, S and T switch
When R , S , T are changed, both of [ 1L ] and [ 2L ] turns the all outputs off, and each voltage amplifier
output 1 to 3 are rotated as below.
outputpin no.
1
35RX4718W

R

S

T

V1
V2
V3
3-21

V2
V3
V1

V3
V1
V2

3.3 Operation of amplifier output
Side terminal

1L
2L

1L

② ①
⑤ ④ ③

2L

⑥

Amp 1

Amp 2

Voltage out 1L
1L
2L

Voltage
Amp 3

② ①
⑤ ④ ③

1L
2L

V
U
Voltageout 1

UV
Voltageout 2⑥
Voltage out 2L

UV
Voltageout 3

Figure 3-3 Operation of output selector in 3-PHASE settingC) 1-PHASE
In 1-phase mode, the voltage-amplifier-1 signal is output to the voltage-output-connector 1L and the
42 SIDE is turned on.
voltage-amplifier-3 signal is output to the voltage-output-connector 2L. The LED of ○

Setting procedure
47 SELECTOR MODE to display the selector mode
Press SHIFT+○SETTING/DATA

on the【SETTING / DATA】display.

SELECTOR

Rotate MODIFY to select [1 PHASE] and press ENTER.

1 PHASESETTING/DATAIn the single-phase setting, the voltage amplifier 2 signal is not used and the setting values for amplitude and phase
are not indicated.

NORMAL V1(V) NORMAL V2 (V) NORMAL V3 (V)63.50-------

63.50

0.0

------

240.0

NORMAL φ1(ﾟ)NORMAL φ2 (ﾟ) NORMAL φ3(ﾟ)The single-phase mode contains the ground-fault mode and short-circuit mode, and selection of R, S, and T isavailable for each mode. In the single-phase setting, the output is not turned off even if this selection is made.

■ Ground fault setting
When GROUND FAULT is pressed, the LED is turned on, and the 3-wire 4-phase mode is made for both output
connection of 1L and 2L.
Ｒ, Ｓ, and Ｔ allows rotation as shown below.
Voltage
amplifier 1
Voltage
amplifier 3

RX4718W

U――――――――→
V――――――――→
U――――――――→
V――――――――→

Ｒ
(①)
(②)
(①)
(②)

3-22

Ｓ
(③)
(②)
(③)
(②)

Ｔ
(⑤)
(②)
(⑤)
(②)

Voltage
output 1L
Voltage
output 2L

3.3 Operation of amplifier output
Side terminal

R
S
T

② ①
⑤ ④ ③

Amp 1

⑥
Amp 2

Voltage out 1L

R
S
T

② ①
⑤ ④ ③

Amp 3

⑥
U
V
Voltageout 1

UV
Voltageout 2

Voltage out 2L

UV
Voltageout 3

Figure 3-4 Operation of output selector in ground fault setting■ Short circuit setting
47 SHORT CIRCUIT and the LED is turned on, and line-to-line voltage connection is made for both output
Press ○
connection of 1L and 2L.
Ｒ, Ｓ, and Ｔ allows switching as shown below.
Voltage
amplifier 1
Voltage
amplifier 3

U――――――――→
V――――――――→
U――――――――→
V――――――――→

Ｒ(R-S)
(①)
(③)
(①)
(③)

Ｓ(S-T)
(③)
(⑤)
(③)
(⑤)

R-S
S-T
T-R
Amp 1

R-S
S-T
T-R

Ｔ(T-R)
(⑤)
(①)
(⑤)
(①)

Voltage
output 1L
Voltage
output 2L

Side terminal

② ①
⑤ ④ ③
⑥
Voltage out 1L

Amp 2

R-S
S-T
T-R

Amp 3

R-S
S-T
T-R
U
V
Voltageout 1

UV
Voltage
out 2

② ①
⑤ ④ ③
⑥
Voltage out 2L

UV
Voltageout 3

Figure 3-5 Operation of output selector in short circuit setting

RX4718W

3-23

3.4 Output signal setting

3.4

Output signal setting

In case of using the internal synthesizer signal, refer to the description of “3.4.1 Setting of frequency“ up to “3.4.3
Waveform selection“

3.4.1

Frequency setting

Frequency mode setting is common to all outputs.


Setting procedure
41 SHIFT+○
62 FREQ MODE key to display the frequency mode
Press ○
on the【SETTING / DATA】display .
Select the frequency mode to be set with MODIFIY dial,
55 ENTER key.
and press ○SETTING/DATAFREQ MODE
LINE
SETTING/DATA■ 50Hz fixed [50Hz FIX]
The normal/fault frequency is 50Hz if [50Hz FIX] is displayed on the display of【NORMAL･FAULT FREQ】.
■ 60Hz fixed [60Hz FIX]
The normal/fault frequency is 60Hz if [60Hz FIX] is displayed on the display of【NORMAL･FAULT FREQ】.
■ Internal [INTERNAL]
The normal/fault frequency is set in the range of 10.000 to 200.000Hz.
Since the normal frequency and the fault frequency can be set individually, the frequency quick change and thefrequency sweep are available.
The following are one setting examples.
MODE
Move the cursor to【NORMAL FREQ】display with ▲, ▼, ◄ and ► and input 50.1 with
MANUALthe numeral buttons,and then press ENTER key.
50.100The normal frequency is set to [50.100].
NORMAL FREQ(
Next, move the cursor to the first decimal point of [50.100] with COARSE◄ and FINE►.
MODE
If the MODIFY is turned to the right, the number will increase to [50.200],
MANUALand if it is turned to the left, the number will decrease to [50.000].
50.000Setting of【FAULT FREQ】is available following the same procedure above.
NORMAL FREQ(■ Line synchronization [LINE]The normal/fault frequency is synchronized with the commercial power supply frequency.
The synchronization frequency range is from 45 to 65Hz.
[LINE] is displayed on the【NORMAL･FAULT FREQ】display.
■ External synchronization [EXTERNAL]

34 [FREQ SYNC SIG IN] terminal.
The normal/fault frequency is synchronized with the signal applied to ○The synchronization frequency range is from 45 to 65Hz.
[EXTERNAL] is displayed on the【NORMAL FREQ】and【FAULT FREQ】display.

RX4718W

3-24

3.4 Output signal settingA) Refernce phase and frequency synchronization signal input/output
All phase difference settings of signals of the RX4718Ｗ (output phase and fault start phase) are the values inrelation to a reference phase.
The following frequency synchronization signal output is used as a reference phase.
35 [FREQ SYNC SIG OUT]◯

(for 4705A,etc):

TTL signal output
The falling edge is the reference phase of 0 ﾟ.

When the frequency mode is set for external synchronization, the following frequency synchronization signal inputs
is used as the reference phase.
34 [FREQ SYNC SIG IN]◯(for 4705A,etc):

TTL signal output
The falling edge is the reference phase of 0 ﾟ.

When the negative-value-phase-setting is enabled, lead/lag-phase-setting is available, and setting range is from
359.9 to +359.9.

All phase settings will take positive (+) value in lag-phase-setting.
Therefore, a setting of " 90 " will produce lag-phase of " 90 " in relation to the reference phase, and a setting of "90 " will produce lead-phase of " 90 " in relation to the reference phase.
RX4718W is designed so that phase setting values are available freely.
In practical use, however, it would be simple and easy to assign phase of " 0 " to the phase of the output that theuser wants to take for the reference.
“Figure 3-6 Output waveform with setting of V1: 0 ﾟ, V2: 120 ﾟ and V3: 240 ﾟ“

3.4.2

Setting of amplitude and phase

The output amplitude setting is limited within the range-setting of the amplifier.
Therefore, set the output amplitude after setting the required range.
When the negative-value-phase-setting is disabled, lag-phase-setting is available, and setting value is from 0 to+359.9.
When the negative-value-phase-setting is enabled, lead/lag-phase-setting is available, and setting value is from
359.9 to +359.9. ("  " means lead-phase)
SETTING/DATA

How to enable the negative value in the phase setting

PHASE MODE

62 OTHER FUNC key and display the other function setting
Press SHIFT+○MINUS off

on the 【SETTING / DATA】display.

SETTING/DATA

Turn MODIFY dial to select [PHASE MODE].

SETTING/DATA

Move the cursor down with ▼.

PHASE MODE

Turn MODIFY dial to select either [MINUS on] or [MINUS off].

MINUS onSETTING/DATA

The amplitude are set respectively on the【NORMAL V1 to V3】and【FAULT V1 to V3】display.
The phase are set respectively on the【NORMAL φ1 toφ3】and 【FAULTφ1 toφ3】display .
62 VOL 1 , VOL 2
The cursor can be moved on the items with ▲, ▼, ◄ and ►, but using ○convenient as shown below.

RX4718W

3-25

and VOL 3 key is3.4 Output signal setting①

First press VOL 1 key to move the cursor to the【NORMAL V1】display.

②

Press VOL 1 key again, and the cursor will be moved to the【NORMAL φ1】display.

③

Press VOL 1 key again, and the cursor will be moved to the【FAULT V1】display.

④

Press VOL 1 key again, and the cursor will be moved to the【FAULT φ1】display.

⑤

Press VOL 1 key again, and the cursor will go back to the【NORMAL V1】display.

The same operation is applied to VOL 2 and VOL 3 key.
①→

NORMAL V1(V)

②

→

③

→

④

→

⑤

NORMAL V1(V)NORMAL V1(V)NORMAL V1(V)NORMAL V1(V)

0.00

0.00

0.00

0.00

0.00

0.0

0.0

0.0

0.0

0.0

NORMALφ1 (ﾟ)NORMALφ1 (ﾟ)NORMALφ1 (ﾟ)NORMALφ1 (ﾟ)NORMALφ1 (ﾟ)FAULT V1(V)

FAULT V1(V)

FAULT V1(V)

FAULT V1(V)

FAULT V1(V)

0.00

0.00

0.00

0.00

0.00

0.0

0.0

0.0

0.0

0.0

FAULTφ1 (ﾟ)FAULTφ1 (ﾟ)FAULTφ1 (ﾟ)FAULTφ1 (ﾟ)FAULTφ1 (ﾟ)When the cursor is on the setting position for the amplitude and phase, the cursor movement by COARSE◄ andFINE► is limited to the last three digits.
Move the cursor to the place you wish to set, and set the amplitude value and phase value with the numericalbuttons or MODIFY dial.
■ Setting example of amplitude and phase
Set the voltage-output-2 to 125V.
Press VOL 2 key to move the cursor to the【NORMAL V2】display. Input 63.5 with the numeral buttons and press
ENTER key, and the normal voltage 2 will be set as 63.5V.
NORMAL V1(V) NORMAL V2(V) NORMAL V3(V)

0.00

63.50

0.00

0.0

0.0

0.0

NORMALφ1(ﾟ) NORMALφ2(ﾟ) NORMALφ3(ﾟ)Then, press VOL 2 to move the cursor to the【NORMAL φ2】display. Input 100 with the numeral buttons and press
ENTER key, and the normal phase 2 will be set as 100 ﾟ.
NORMAL V1(V) NORMAL V2(V) NORMAL V3(V)

0.00

63.50

0.00

0.0

100.0

0.0

NORMAL φ1(ﾟ) NORMAL φ2(ﾟ) NORMAL φ3 (ﾟ)Press COARSE◄ two times, t
hen turn MODIFY dial to the right for two times, and the normal phase 2 will be set as 120 ﾟ.
NORMAL V1(V) NORMAL V2(V) NORMAL V3(V)

0.00

63.50

0.00

0.0

120.0

0.0

NORMAL φ1(ﾟ) NORMAL φ2(ﾟ) NORMAL φ3 (ﾟ)RX4718W

3-26

3.4 Output signal settingA) Balanced 3-phase and Interlock 3-phase
62 BALANCED 3 allows automatic setting of balanced 3-phase with the phase where the cursor is placed
SHIFT+ ○as a standard.

The amplitude value of three outputs are set to the same value of the output where the cursor is placed, and thephase difference is shifted 120 ﾟ in relation to the output where the cursor is placed.


NORMAL V2(V)Setting example
Set【NORMAL V2】to 63.5V and 【NORMAL 2】to 120.0 ﾟ.

63.50

Move the cursor to【NORMAL V2】or【NORMAL 2】.

120.0
NORMAL φ2(ﾟ)62 BALANCED 3, and【NORMAL VOL･PHASE 1-3】 becomes the balanced 3-phase setting
Press SHIFT+○
as below.

NORMAL V1(V) NORMAL V2(V)NORMAL V3(V)

63.50

63.50

63.50

0.0

120.0

240.0

NORMAL φ1(ﾟ)NORMAL φ2(ﾟ) NORMAL φ3(ﾟ)The above procedure is applied to the【FAULT VOL･PHASE 1-3】setting.
If the range setting of voltage-output-1 to 3 is different each other, an error occurs when the amplitude is set bigger
than the range set.
35 frequency sync signal and the normal voltage output 1 to 3
The figure below shows the output waveform of ◯when the normal phase 1 is set to 0 ﾟ, normal phase 2 to 120 ﾟ, normal phase 3 to 240 ﾟ.

Referencephasephase
Reference
35 Frequency sync○
35 Frequency sync○
signal output
signal output

Figure 3-6 Output waveform with setting of V1: 0 ﾟ, V2: 120 ﾟ and V3: 240 ﾟ
The amplitudes or phases of three channels can be changed with MODIFY simultaneously. The LED is turned onwhen the cursor is moved to the value you wish to change and INTERLOCK 3φ is pressed, and the amplitude orphase can be changed in all three channels by rotating MODIFY.
In interlock 3φsetting, the phase can be change regardless of the range setting, but the amplitude can not bechanged and an error occurs when the ranges of voltage output 1 to 3 are different.
RX4718W
3-27

3.4 Output signal setting
1LG settingThis function automatically sets the conditions for single line-to-ground fault (1LG) in a resistance neutral
grounding system by calculation using normal voltages and zero-phase voltage.

Figure 3-7 1LG setting
The normal value must be set to the balanced 3-phase beforehand. The zero-phase voltage (3Vo) should be set to thevalue divided by

3 .

Setting procedure of the phase voltage 63.5V (line-to-line 110V) and the complete ground fault (3 Vo is 110V) of
V1 phase
NORMAL V1(V) NORMAL V2(V) NORMAL V3(V)Set the normal value to 63.5V of the balanced three

63.50

63.50

63.50

phase function.

0.0

120.0

240.0

NORMAL φ1(ﾟ) NORMAL φ2(ﾟ) NORMAL φ3(ﾟ)Press SHIFT+1LG SETTING to display the 1LG setting on

SETTING/DATA【SETTING / DATA】.

V1

Select the ground fault phase with MODIFY. Select [V1] here.

3Vo 0.000V
SETTING/DATA

Move the cursor with ▼ and input 110 with the numeral buttons,

SETTING/DATA

and press ENTER to finalize the value of 3Vo.

V1(The value of 3Vo can be set with MODIFY.)

3Vo 110.0V
SETTING/DATA

When ENTER is pressed in the condition above, the fault value is set to the V1 phase complete ground fault.
FAULT V1(V)

FAULT V2(V)

FAULT V3(V)0.00

110.00110.00 V1

0.0

150.0

210.0

SETTING/DATA

3Vo 110.0V

FAULT φ1(ﾟ) FAULT φ2(ﾟ) FAULT φ3(ﾟ) SETTING/DATA

When the amplitude value calculated from the 3Vo value exceeds the range value, an error occurs and setting can
not be completed. Set it in the necessary range.

RX4718W

3-28

3.4 Output signal settingB) 2LS settingThis function automatically sets the conditions for two-line short circuit (2LS) by calculation using normal voltages
and the line-to-line voltage to be short-circuited.

Figure 3-8 2LS setting
The normal value must be set to the balanced 3-phase beforehand.


Setting procedure of the phase-voltage being 63.5V (line-to-line 110V) and a short circuit made across V2-to-V3(VF of 60V)

NORMAL V1(V) NORMAL V2(V) NORMAL V3(V)Set the normal value to 63.5V of the balanced
3φ.

63.50

63.50

63.50

0.0

120.0

240.0

NORMAL φ1(ﾟ) NORMAL φ2(ﾟ) NORMAL φ3(ﾟ)SETTING/DATA
62 2LS SETTING to display the 2LS setting
Press SHIFT+○

V2-V3

on【SETTING / DATA】.

VF

Select the short circuit line with MODIFY. Select [V2-V3] here.

SETTING/DATA

0.000VSETTING/DATA

Move the cursor with ▼ and input 60 with the numeral buttons,

V2-V3

and press ENTER to finalize the VF value.

VF(The VF value can be set with MODIFY.)

60.00VSETTING/DATA

When ENTER is pressed in the condition above, the fault value is set to the V2-V3 line short circuit fault (VFis 60V).
FAULT V1(V) FAULT V2(V) FAULT V3(V) SETTING/DATA

63.50

43.68

43.68 V2-V3

0.0

136.6

223.4

VF

60.00V

FAULT φ1(ﾟ) FAULT φ2(ﾟ) FAULT φ3(ﾟ) SETTING/DATA

When the amplitude value calculated from the VF value exceeds the range value, an error occurs and setting can not
be completed. Set it in the necessary range.

RX4718W

3-29

3.4 Output signal settingC) Line voltage calculation function
In the 3-phase 4-wire output mode, line-to-line-voltage and zero-phase-voltage are displayed on the【SETTING /DATA】display as the result of calculating from the phase-voltage value and phase value.


Setting procedure

SETTING/DATA

62 OTHER FUNC to display the other function on thePress SHIFT+○

LINEtoLINE【SETTING / DATA】display.
Rotate MODIFY to select [LINEtoLINE].

SETTING/DATA
SETTING/DATA

Press ► to display the line to line voltage on the 【SETTING / DATA】,

NORMAL V1-2

then the calculation result is displayed underneath.

110.0V

Rotate MODIFY , and the following results are displayed.
[NORMAL V1-2] normal voltage between V1 and V2[NORMAL V2-3] normal voltage between V2 and V3[NORMAL V3-1] normal voltage between V3 and V1[FAULT V1-2]
fault voltage between V1 and V2[FAULT V2-3]
fault voltage between V2 and V3[FAULT V3-1]
fault voltage between V3 and V1[NORMAL V0]
normal voltage at zero-phase[FAULTV0]
fault voltage at zero-phase

SETTING/DATA

Press ◄ , and the other function is displayed on the【SETTING / DATA】display again.

RX4718W

3-30

3.4 Output signal settingD) Phase rotation
This function changes the set value of the range and amplitude/phase as follows: V1→V2, V2→V3, V3→V1 or V1←V2, V2←V3, V3←V1. When the signal outputs are rotated, outputs are turned off in all outputs.


Setting procedure
Press SHIFT+OTHER FUNC to display the other function on the【SETTING / DATA】display.
Rotate MODIFY to select [ROTATE PHASE].
MODE

NORMAL V1(V) NORMAL V2(V) NORMAL V3(V)TIMER/SWEEPMANUAL

63.50

63.50

63.50 -----------

50.000

0.0

120.0

240.0

NORMAL FREQ(Hz)NORMALφ1(ﾟ) NORMALφ2(ﾟ) NORMALφ3(ﾟ) TIMER/SWEEP TIMEMASTER/SLAVE FAULT V1(V) FAULT V2(V)FAULT V3(V) SETTING/DATASEPARATE

63.50

43.68

50.0000.0

136.6

FAULT FREQ(Hz)43.68 ROTATE PHASE
223.4 V1←V2←V3

FAULTφ1(ﾟ) FAULTφ2(ﾟ) FAULTφ3(ﾟ) SETTING/DATA

Move the cursor down with ▼ , and turn MODIFY to the right, and [V1→V2→V3] is displayed and thedisplay values are rotated as V1→V2, V2→V3, V3→V1.
MODE NORMAL V1(V)NORMAL V2(V)NORMAL V3(V) TIMER/SWEEPMANUAL

63.50

63.50

63.50 -----------

50.000

240.0

0.0

120.0

NORMAL FREQ(Hz) NORMALφ1(ﾟ) NORMALφ2(ﾟ) NORMALφ3(ﾟ) TIMER/SWEEP TIMEMASTER/SLAVE FAULT V1(V) FAULT V2(V) FAULT V3(V)SEPARATE

43.68

63.50

50.000223.4

0.0

SETTING/DATA

43.68 ROTATE PHASE
136.6 V1→V2→V3

FAULT FREQ(Hz) FAULTφ1 (ﾟ) FAULTφ2(ﾟ) FAULTφ3(ﾟ)SETTING/DATA

Rotate MODIFY once again, then, the values are rotated as V1→V2, V2→V3, and V3→V1.
MODE NORMAL V1(V) NORMAL V2(V)NORMAL V3(V) TIMER/SWEEPMANUAL

63.50

63.50

63.50 -----------

50.000

120.0

240.0

0.0

NORMAL FREQ(Hz)NORMALφ1(ﾟ) NORMALφ2(ﾟ) NORMALφ3(ﾟ) TIMER/SWEEP TIMEMASTER/SLAVE FAULT V1(V) FAULT V2(V) FAULT V3(V) SETTING/DATASEPARATE

43.68

43.68

50.000

136.6

223.4

63.50 ROTATE PHASE
0.0 V1→V2→V3

FAULT FREQ(Hz) FAULTφ1(ﾟ) FAULTφ2(ﾟ) FAULTφ3(ﾟ) SETTING/DATA

If MODIFY is rotated to the left, [V1←V2←V3] is displayed and the values are rotated as V1←V2, V2←V3,
and V3←V1.
MODE NORMAL V1(V) NORMAL V2(V) NORMAL V3(V) TIMER/SWEEPMANUAL

63.50

63.50

63.50 -----------

50.000

240.0

0.0

120.0

NORMAL FREQ(Hz) NORMALφ1(ﾟ) NORMALφ2(ﾟ) NORMALφ3(ﾟ) TIMER/SWEEP TIMEMASTER/SLAVE FAULT V1(V) FAULT V2(V) FAULT V3(V) SETTING/DATASEPARATE

43.68

63.50

50.000223.4

0.0

FAULT FREQ(Hz)RX4718W

43.68 ROTATE PHASE
136.6 V1←V2←V3

FAULTφ1(ﾟ) FAULTφ2(ﾟ) FAULTφ3(ﾟ)3-31

SETTING/DATA

3.4 Output signal setting

3.4.3

Waveform selection

Same waveform is set to all outputs by waveform selection.
A sine wave is set in normal operation, but other waveform may be set in special tests.
When the wave selection is modified, the all outputs will be turned off for safety.


Setting procedure

SETTING/DATA

62 OTHER FUNC to display the wave selection setting
Press SHIFT+○on the【SETTING / DATA】display.

WAVE SELECT

Rotate MODIFY to select [WAVE SELECT].

SETTING/DATA

Move the cursor down with ▼ and select the wave to be changed

WAVE SELECT

by rotating MODIFY, then, press ENTER.

HARMONIC 1

SINE
SETTING/DATA

SETTING/DATA■ Sine wave [SINE]
When [SINE ] is displayed on the【SETTING / DATA】display , sine waves are output.
50 status-display-LED, <HARMONIC ARBITRARY> LED is turned off.
OF ○■ Harmonic 1 [HARMONIC 1]＊1 (Japanese model only)

When [HARMONIC 1] is displayed on the【SETTING / DATA】display, the harmonic-1 are output.
50 status-display-LED, <HARMONIC ARBITRARY>LED is turned on.
OF ○Set the harmonic-1 parameter-data through GPIB or RS-232C in advance.

■ +DC[+DC], -DC[-DC]
This outputs +DC/-DC.
<HARMONIC ARBITRARY>LED is turned on and [+DC MODE] / [-DC MODE] isdisplayed on the【NORMAL FREQ】and【FAULT FREQ】display.
+DC/-DC may be dangerous if handled improperly, and is enabled/disabled by the internal DIP switch.
The menu is not displayed if the internal DIP switch is set to disabled position.
“2.2 Setting of internal dip switch“

RX4718W

3-32

3.4 Output signal settingA) Setting of harmonic-1 parameters*1＊１（Japanese model only）

Harmonic-1 calculates the waveform from the amplitude value and phase value of the selected harmonic and writes
it in the waveform memory to generate the waveform. Therefore, the amplitude and phase of the harmonic can not
be changed with the modify dial when harmonic waveform signal has been ouput.
Harmonic-1 parameters set the normal and fault status of each output individually.
The parameters consist of the percentage of the amplitude from first to 25th order (0.0 to 100.0%) and the phase(0-359 ﾟ). However, if the waveform obtained as a result of calculation exceeds the 100% of wave crest of thefundamental (first order), an error occurs and the parameters will not be set.
When the harmonic-1 is selected, the output will be turned off if the parameters are changed and calculated.


Setting procedure
Press SHIFT+OTHER FUNC to display the other function on the【SETTING / DATA】.
Rotate MODIFY and select [HARMONIC 1].

SETTING/DATAHARMONIC1NORMAL V1
SETTING/DATA

Move the cursor down with ▼ , select one of followings with MODIFY[NORMAL V1] normal voltage 1[NORMAL V2] normal voltage 2[NORMAL V3] normal voltage 3[FAULTV1]
fault voltage 1[FAULTV2]
fault voltage 2[FAULTV3]
fault voltage 3
And then press ►.

NORMAL V1

Then the parameter input is displayed on the【SETTING / DATA】display.

SETTING/DATA(The display shown on the right is the example when [FAULT V1]

SETTING/DATAHARMONIC1SETTING/DATA

FAULT V1 1

is selected.)

100.0%The number on the upper right shows the order of the harmonic,

SETTING/DATA

when [ % ] is displayed, the value displayed is amplitude value, and when [ °] is displayed, the value
displayed is value of the phase.
If the cursor is moved up and MODIFY is rotated, the parameter will change as following.
[1: amplitude]→[1: phase]→[2: amplitude]……[24: phase]→[25: amplitude]→[25: phase]
Move the cursor down and set the parameter value with the numeral buttons or MODIFY.
When the parameter value is changed, [X] is displayed on the right of the unit

SETTING/DATA

to indicate that the parameter value is changed and the calculation is not carried out.

FAULT V1 3
When the change is completed and ENTER is pressed, the calculation is carried out and30ﾟ
X[X] will disappear.
SETTING/DATA
When the parameter is displayed on【SETTING / DATA】,【SETTING / DATA】will return to [HARMONIC 1] of
the other function if ◄ is pressed.

RX4718W

3-33

3.5 Operation mode

3.5

Operation mode

RX4718W operates in the several modes depending on the setting.
The Operation mode includes the following 15 modes and the selected operation mode is displayed on the【MODE】
60 .
display of ○Manual mode
Quick-change mode
Operation･recovery
simultaneous measurement mode
Normal sweep
Search sweep
DSK search sweep
Frequency relay (95) test mode
SOR quick change mode

[MANUAL][HLD MODE], [NHD MODE][OP:RECOV][SWEEP], [1LG SWEEP], [2LS SWEEP],[SRCH SWP], [1LG SRCH], [2LS SRCH],[DISKSWP], [DISK 1LG SRCH], [DISK 2LS SWP],[FREQ RLY]
[SOR MODE]

When the operation mode is changed, the all outputs are turned off for safety.


Setting procedure
62 , and the operation mode is displayed on thePress MODE key of ○【SETTING / DATA】display.

MODE

Select the operation mode you wish to set with MODIFY dial.

HLD MODESETTING/DATA

SETTING/DATA
55 .
and press ENTER key of ○NORMAL key sets the amplitude output to normal value and FAULT key sets it to fault value.

SWEEP▲, STOP, SWEEP▼ starts and stops sweeping the output value.
54 .
The status of the output is confirmed by the LEDs of these operation command keys of ○FAULT key function can be set to either Alternate or Momentary mode by PSW mode setting.

■ Setting procedure of PSW mode
62 , the other function is displayed
Press SHIFT+OTHER FUNC key of ○on the【SETTING / DATA】display.

Turn MODIFY dial, and display [PSW MODE] on the【SETTING / DATA】display.
SETTING/DATA

Move the cursor down with ▼.

PSW

Turn MODIFY dial, and display [MOMENTARY] or [ALTERNATE]

MODE

ALTERNATE

on the【SETTING / DATA】display.

SETTING/DATA

54 lights up when the PSW mode is [ALTERNATE].
<ALTERNATE>LED of ○54 does not light up when the PSW mode is [MOMENTARY].
<ALTERNATE>LED of ○When the PSW mode is the Alternate mode, the outputs turn to fault value if FAULT key is pressed.
And the fault value is kept on even if FAULT key is released.
In order to return the output to normal value, press FAULT key again or press NORMAL key.

When the PSW mode is Momentary mode, the outputs turn to fault value if FAULT key is pressed,
but the output value returns to normal value as soon as FAULT key is released.
FAULT key

FAULT key

ReleasePress
ReleaseNormal

PSW mode is Alternate mode

PSW mode is Momentary mode

Press

Amplifier output

RX4718WNORMAL key or
FAULT key

Fault

NormalFigure 3-9 Operation of PSW mode
3-34

3.5 Operation mode

3.5.1

Trip input and operation start input■ Operation of [TRIP INPUT]
1 to○
4 ).
The operation-signal from a protective relay is applied to the [Trip-Input] terminal (○The input signal of the [Trip-Input] controls operation as below according to the Operation Mode.
Manual modeno useQuick change mode
timer measurement and control of normal/fault state
Operation･Recovery simultaneous measurement mode
timer measurement
Normal sweep
stop of sweep (measurement of Operation･Recovery value)
Search sweep
stop of sweep (measurement of Operation･Recovery value)
DSK search sweep
stop of sweep (measurement of Operation･Recovery value)
Frequency relay(95) test mode Operation･Recovery frequency and timer measurement
SOR quick-change modemonitor of trip signal ON/OFF■ Operation of [START INPUT]
In order to externally start the Quick Change/Sweep, the start signal is applied to the [START INPUT]
5 or ○
6.
terminals○
The input signal of the [START INPUT] controls operation as below according to the Operation Mode.
Manual modeno useQuick change mode
control of Start/Stop of operation
Operation･Recovery simultaneous measurement mode
control of Start/Stop of operation
Normal sweep
start of operation only
Search sweep
no useDSK search sweep
no useFrequency relay (95) test mode start of operation only
SOR quick-change mode
start of operation only！

CautionWhen the Operation Mode is set for quick change mode and Operation/Recovery
simultaneous measurement mode:
Quick change starts with the [START INPUT] signal (level-low), and the Fault output
value returns to Normal value with [START INPUT] signal recovery (level-high).
Therefore, when the [START INPUT] signal contains chattering, as the signal isconsidered to be removed instantly, the output value (Fault value) returns to Normal
value immediately. No chattering shall be contained in the operation [START INPUT]
signal.
If chattering cannot be removed, recovery function of the operation [START INPUT] signal
can be set to disable.
“3.5.1.D) Stop Function of operation start input “This setting prohibits returning output value (Fault value) to Normal value with chattering,so, the following procedure is necessary for returning to Normal value.
When PSW mode is the Alternate mode,press NORMAL or FAULT key.
When PSW mode is Momentary mode, release
FAULT key.

RX4718W

3-35

3.5 Operation modeA) Setting of [TRIP INPUT] logic
In standard operation, RX4718W takes a trip-signal of Voltage-Apply (or short-contact = "a" contact) as a
trip-operation, and a trip-signal of Voltage-Remove (or open-contact = "b" contact) as a trip-recovery.
The standard setting is [↑a : RISE] and the reverse setting is [↓b : FALL].
The setting procedure is as follows.
62 TRIP :b can change [↑a :RISE] and [↓b : FALL] alternatively.
SHIFT+○
50 <TRIP: b>LED on the front panel is turned off.
When [↑a : RISE] is selected, ○50 <TRIP: b> LED on the front panel is turned on.
When [↓b : FALL] is selected, ○

Setting procedure

62 TRIP:b key alternates [↑a :RISE] and [↓b : FALL] setting.
○
50 <TRIP: b>
62 on the front panel will be turned off.
With [↑a : RISE] setting, the ○and TRIP: b of ○50 <TRIP: b>
62 on the front panel will be turned on.
With [↓b : FALL] setting, the ○and TRIP: b of ○Confirm your setting according to the following principles:
When the protective relay operates and a signal is produced (the voltage changes from Low to High or the
50 < TRIP: b > LED turns
contact changes from short-circuit to open), [↑a : RISE] setting is selected and the ○off.
When the protective relay operates and the signal is removed (the voltage changes from High to Low or thecontact changes from short-circuited to opened), [↓b : FALL] is selected and the [TRIP: b] LED turns on.
50 <TRIP INPUT> of character indication LED on the front panel lights up whenever voltage is applied○(contact is short-circuited) regardless of setting.

B) Setting of trip input chattering correction function
In case of testing a mechanical protective relay, chattering may be contained on a contact changing occasion,
which makes it difficult to determine the trip-operation point.
Therefore, RX4718W is provided with chattering correction function to ease determination of thetrip-operation point. If a value is set in the chattering correction function, the system concludes that the signal
is changed when no chattering has been found for the set time period after the signal change.
When the chattering correction function is turned [on], the timer measurement value is corrected by thechattering correct time.
“3.5.3.A) Timer“openTrip input
short
open
Trip input, internal recognition
short

Chattering correction time

Figure 3-10 Operation of Chattering Correction Function

Setting procedure

SETTING/DATA

62 and display the other function on thePress SHIFT+OTHER FUNC key of ○【SETTING / DATA】display.

CHATTERING
off

Rotate MODIFY dial and select [CHATTERING].

SETTING/DATA

Move the cursor down with ▼, and rotate MODFIY dial to select [on]SETTING/DATA[off]: (<CHATTERING> of ○ on the front panel will light off),[on]

50 on the front panel will light on) and press ►.
:(<CHATTERING> of ○50

CHATTERING
12ms

Set the chattering correction time with the numeral buttons or MODIFY dial. (1-100ms) SETTING/DATA

RX4718W

3-36

3.5 Operation modeC) Setting of operation start input logic
In standard operation, RX4718W takes an operation start input of voltage application (or contact short-contact)
as a start trigger signal, and an operation start input of voltage removal (or open-contact) as a trip-recovery.
A sign of [ a : RISE] indicates voltage application (or contact short-contact) as a start operation.
A sign of [↓b : FALL] indicates voltage removal (or open-contact) as a trip-recovery.
Standard setting displays [a : RISE], and inverted setting displays [↓b : FALL].


Setting procedure
62 to display the other function on the【SETTING / DATA】display.
Press SHIFT+OTHER FUNC of ○Rotate MODIFY and select [START INPUT].
Move the cursor down with ▼ and turn MODIFY to selectSETTING/DATA

50 on the front panel will light off),[a : RISE] (<START: b> LED of ○START INPUT

50 on the front panel will light on).
[↓b :FALL] (<START: b> LED of ○↑a RISESETTING/DATA

50 on the front panel lights up whenever voltage is applied (contact is< START INPUT> LED of ○short-circuited) regardless of setting.

D) Stop Function of operation start input
In standard operation, output signal of RX4718W are changed to the fault state by the operation start input ofvoltage application (or contact short-contact).
Recovery to the normal state of output signal of RX4718W by the voltage removal (or open-contact) of an
operation start input can be set to enable/disable.
Select " on " when the user wishes to use the Stop-Function, and selects " off " when not to use theStop-Function.
Setting procedure
62 , and the other function is displayed on thePress SHIFT+OTHER FUNC key of ○【SETTING / DATA】

display.
Rotate MODIFY dial to select [STOP FUNC].
Move the cursor down with ▼, and turn MODIFY dial,and select [on] or [off].

SETTING/DATASTOP FUNC
off
SETTING/DATA■ [ on ]When the Stop-Function is [on], if an operation start input turns to voltage removal (or open-contact),
the Stop-Function is carried out. And the output signal will return to normal state from fault state.
This is available when the operation mode is as follows.
Quick change mode
Simultaneous operation/recovery measurement mode
When the operation mode is neither of the above mode, the Stop-Function is not available even if [ on ] is set■ [ off ]When the Stop-Function is [off], even if an operation start input turns to voltage removal (or open-contact),
the Stop-Function is not carried out. And the output will not return to normal state.
When the Stop-Function is [off], in order to return to normal state, perform the following procedure.
When PSW mode is alternate, press NORMAL or FAULT key.
When PSW mode is momentary, release FAULT key.

RX4718W

3-37

3.5 Operation mode

3.5.2

Operation of manual mode

Use manual mode to check general operation of a protective relay. This is not affected by the trip input or
operation start input. In addition, the timer does not work. However NORMAL and FAULT key control allow
setting the amplifier output for normal and fault state.
In manual mode, trip-input or operation start input does not affect the operation. However, the LED of <TRIP
INPUT> and <START INPUT> on the panel can be used to monitor the input signal status.
Therefore, the operation/recovery point of a protective relay can be measured by changing the settings whileobserving the LED on the panel.

3.5.3

Operation of quick change mode

Quick-change mode is used to measure the operation time (dynamic characteristics) of a protective relay. The
response time of trip signal is measured by quickly changing the RX4718W output from the normal to fault
values.
The quick-change mode includes the hold quick change [HLD MODE] and non-hold quick change [NHD
MODE].
The functions of fault duration, pre-trigger time and fault start phase are effective in this mode only.
54 or Operation start input signal○
5 ,○6 .
Start-command will be triggered by pressing FAULT key of ○54 (depending on the PSW
Recovery-command will be triggered by pressing NORMAL, FAULT key of ○5 ,○6 (when the Stop-Function is " on ") and Fault duration (when themode setting), Operation start input○function is " on ").
■ Hold quick change[HLD MODE]: This simulates a permanent fault ("HLD" stands for "hold")
54 key, or Operation-start-input○
5 ,○6 ) causes the Amplifier output to quickly
Start-command (FAULT ○change to the Fault state.
↓
When Auto-Recovery of the timer setting is " ON ", and the timer mode is [INTERVAL] or[SEP.TIMER], Fault-state returns to normal state at the timing of the first rising edge of trip signal (one
1 to○
4 ).
of ○

When Auto- Recovery of the timer setting is "ON", and the timer mode is [ONE-SHOT], fault state
1 to○
4 ).
returns to normal state at the timing of the first falling edge of trip signal (one of ○When Auto-Recovery of the timer setting is " OFF ",even if the trip signal is applied, Fault-state does
not return to normal state.
↓
14 ) does not change the normal state of the
Thereafter, any change of trip signal (one of ○to ○amplifier output.
↓
Recovery-command only can turn fault state of amplifier output to normal state, and thereafter
amplifier-output can not be changed by change of trip signal.

RX4718W

3-38

3.5 Operation mode

When Start-command is FAULT and Stop-command is FAULT (PSW mode is momentary)

FAULT

Release(OFF)Press(ON)
Quick-change command-Direct output

Waiting time of the pre-trigger
time or fault start phase

Approx. 0.1s

When the pre-trigger time andthe fault start phase are [off]Quick-change command-Delay output
Pre-trigger output[INTERVAL] [SEP.TIMER]
Trip-input

Amplifier output[ONE-SHOT]
NormalFault

NormalFigure 3-11 Operation of Hold-Quick-change when the Auto-return of the timer menu is [ON]When Start-command is Operation-start-input (Stop-setting is ON) and Fault-state returns toNormal-state by Return-command
Start-command
Quick-change command
Direct output
Quick-change command
Delay output

Waiting time of the pre-trigger
time or fault start phase

Approx. 0.1s

When the pre-trigger time andthe fault start phase are [off]Pre-trigger output
Trip input
Amplifier-output

NormalFault

NormalFigure 3-12 Operation of Hold-Quick-change when the Auto-return of the timer menu is [OFF]RX4718W

3-39

3.5 Operation mode

■ Non-hold quick change[NHD MODE]: This simulates Arc-fault (NHD stands for non-hold).
54 key, or operation start input ○5 ,○6 ) causes the amplifier output to quickly
Start-command (FAULT ○change to the fault state.
↓
1 to○4 ) turns to "ON", fault state returns to normal state.
When trip signal (one of ○↓1 to○4 ) returns to "OFF", normal state turns to fault state again.
When trip signal (one of ○↓Just like the above mentioned, amplifier output alternates normal state and fault state according to trip
signal state of "ON/OFF".
↓
With an operation stop command, the output becomes normal, and thereafter, any change in the trip
signal does not change the output.
Return-command only can turn fault state of amplifier output to normal state, and thereafter amplifier
output can not be changed by change of trip-signal.
When Start-command is Operation-start-input (Stop-setting is OFF) and the Fault-state returns toNormal-state by NORMAL key
Operation-start-input
NORMAL ; Release(OFF)Press(ON)
Waiting time of the pre-trigger
time or fault start phase

Quick-change command
Direct output

Approx. 0.1s

When the pre-trigger time andthe fault start phase are [off]Quick-change command
Delay output
Pre-trigger output

Trip input
Amplifier-output

NormalFault

NormalFigure 3-13 Operation of Non-Hold Quick-change

RX4718W

3-40

Fault

Normal3.5 Operation modeA) TimerIn quick change mode, the timer is used to measure operation-time of protective relay.
There are several timer-measurement modes in [HLD MODE] and [NHD MODE].
In [HLD MODE] : [INTERVAL], [ONE-SHOT] and [SEP.TIMER]
In [NHD MODE] : [INTERVAL] and [TRAIN]

Setting procedure
62 key,【SETTING / DATA】display is set to [Operation-Mode].
By MODE ○TIMER/SWEEP

By MODIFY key, set【SETTING / DATA】display to [HLD MODE] ,0.0ms

and Timer-mode is displayed on【TIMER/SWEEP】display.

INTERVAL

60 display with ▲、▼、◄、►
Move the cursor to【TIMER/SWEEP】○

TIMER/SWEEP

and turn MODIFY to set Timer-measurement mode.
Measurements of INTERVAL, ONE-SHOT and TRAIN are as follows.
A: [INTERVAL], duration-time from fault Quick-change to Trip-input-operation
B: [ONE-SHOT], duration-time from Trip-input-operation(ON) to Trip-input-recovery(OFF)
B+C+D+E…: [TRAIN], a total of Trip-input-operation-time
A

B

C

D

E

Trip Input
Amplifier output

NormalFault

Figure 3-14 Measurement detail of INTERVAL, ONE-SHOT and TRAIN
Start-measure [SEP. TIMER] measures the time from the operation start input to the trip input.
54 key to Trip-input
Start-measure [SEP. TIMER] is defined by the duration from the point of pressing FAULT ○ON.
A: Start measurement[SEP TIMER]

Operation-start-input

A

Trip Input

Figure 3-15 Measurement detail of SEP.TIMER
In Start-measure [SEP. TIMER], only pressing FAULT key is available as the operation start command.
5 ,○6 is not available as the operation start command.
The "start input" signal○

RX4718W

3-41

3.5 Operation mode

■ Auto-reset setting by timer menu
Auto-reset to normal state of amplifier output is available only in the mode of [HLD MODE].
Press SHIFT+OTHER FUNC key, and display the other function on the

TIMER MENU

【SETTING / DATA】display.
Rotate MODIFY dial and select [TIMER MENU].
Move the cursor down with ▼ ,and turn MODIFY dial to select [AUTO RESET], then, press ►.
Select [on] or [off] with MODIFY.
SETTING/DATA

AUTO RESETSETTING/DATA
SETTING/DATA

AUTO RESETon
SETTING/DATA

When [AUTO RESET] is selected, if Trip-input is turned to " ON "-state, amplifier output turns to normal
state from fault state. Auto-reset of [ on ] is selected usually.

When Auto-reset of [off] is selected, ON/OFF-state of the trip-input does not turn amplifier output tonormal state, and amplifier output keeps on fault state
Recovery-command (operation stop command: refer to 3-5-3) only can turn the amplifier output to normal
state. Use this setting if the user wants to prevent the output from changing to normal state in measurementof a Fluctuation-range relay■ Timer measurement value
60【TIMER/SWEEP】
display. The timer automatically selects one
A timer measurement value is displayed on ○of the following three ranges depending on the measurement time.

TIMER/SWEEP(If 999.99s is exceeded, measurement becomes disabled, showing an error message.)

12.136s

0.0-9999.9ms

INTERVAL

10.000-99.999s

TIMER/SWEEP

100.00-999.99s
To clear the timer measurement value, [AUTO] and [MAMUAL] CLEAR are available.
51 key.
[MAMUAL]: The timer is reset by pressing TIMER CLR ○[AUTO]: The timer is reset automatically by every Start-command input in setting [TIMER CLR] [AUTO] on the【SETTING / DATA】display.

[AUTO] can work in the following timer modes.
In [HLD MODE]:[INTERVAL] and [SEP.TIMER]

In [NHD MODE]:[INTERVAL]

In the following timer modes, Timer is reset by only TIMER CLR key even if [AUTO] is set.



In [HLD MODE]:[ONE-SHOT]

In [NHD MODE]:[TRAIN]

Setting procedure for TIMER CLEAR in TIMER MENUSETTING/DATA

TIMER
MENU
Press SHIFT+OTHER FUNC key to display the other function on 【SETTING/
DATA】display.

TIMER CLR

Rotate MODIFY to select [TIMER MENU].

SETTING/DATA

Move the cursor down with ▼ and turn MODIFY
to select [TIMER CLR], then, press ►.
[AUTO] or [MANUAL] is selected by MODIFY.

RX4718W

SETTING/DATATIMER CLR

3-42

AUTO
SETTING/DATA

3.5 Operation mode

■ Correction of timer measurement value using the trip input chattering correction function [ON]When the chattering correction function is "OFF", timer measurement starts to count at the first change of trip
input signal chattering.
If the user wishes to start timer measurement after the trip input signal change becomes stable,
set the chattering correction function "ON].
“3.5.1.B) Setting of trip input chattering correction function“
When the chattering correction function is turned "ON", the measurement value is corrected as below, and thecorrected value is displayed as a timer measurement value.
A: Corrected timer measurement value in [INTERVAL] or [SEP.TIMER] setting
B: Corrected timer measurement value in [ONE-SHOT] setting
Amplifier output

Normal

Fault
AInternal recognitionof trip input

B

Trip Input
Chattering correction time
Timer measurement values are not corrected in [TRAIN] setting.

Figure 3-16 Timer measurement values when the trip input chattering correction function is [on]RX4718W

3-43

3.5 Operation modeB) Fault duration
When fault duration is set to "ON", amplifier output is forced to return to normal state from fault state after the
set-time goes byThis function is used when the user does not want to leave amplifier output fault state for a long time.
Setting procedure
62 to display the fault duration on the【SETTING / DATA】display.
Press SHIFT+DURATION key of ○SETTING/DATA

Rotate MODIFY dial and select [on] or [off] of the function.

DURATIONoff

When the function is turned [on],1.000s50 LED on the front panel will light on.
<FAULT DURATION>○SETTING/DATA

Move the cursor down with ▼ , and use the numeral buttons

SETTING/DATA

or MODIFY dial to set the fault duration time.

DURATION on(0.001-65.000s)

5.000sSETTING/DATA

Only when operation mode is quick change mode, the fault duration function works well,and <FAULT DURATION> LED will light on.
Set the fault duration time a little longer than the expected measurement time. Even if the measurement does
not come to an end, the amplifier output returns to normal state from fault state when the fault duration timegoes by.

Quick-change command
Direct output

Approx.0.1s
Pre-trigger time or waiting time offault start phase

Quick-change command
Delay output

Fault duration

Pre-trigger output

Trip-input
Amplifier-output

NormalFault

Figure 3-17 Operation of Fault-duration

RX4718W

3-44

Normal3.5 Operation modeC) Pre-trigger time and fault start phase
Pre-trigger time (fault delay time) sets the delay time from fault-start-command to an actual quick change ofthe amplifier output.
This function is useful in setting paper feeding time of the mechanical oscilloscope recorder, or in adjustingtransfer-time of the Opposed-test.


Setting procedure of pre-trigger time
62 to display the pre-trigger time on the 【SETTING / DATA】
Press SHIFT+OTHER FUNC key of ○display.

SETTING/DATA

Rotate MODIFY dial and select [PRETRIG] of the function.

PRETRIG on

Move the cursor down with ▼ and select [on] or [off] of the function by

10ms
SETTING/DATA

rotating MODIFY.
When the function is turned [on], <PRETRIG> on the front panel lights on.

SETTING/DATAPRETRIG on

Press ► and use the numeral buttons or MODIFY to set the
pre-trigger time.(10～6000ms)

10ms
SETTING/DATA

A fault-start-phase is the phase value when the amplifier-output quickly changes to fault state after thefault-start-command input. The setting value is set as the phase-delay in relation to the reference phase.
“3.4.1.A) Refernce phase and frequency synchronization signal input/output“Setting procedure of Fault-start-phase
Press SHIFT+OTHER FUNC to display the other function on the【SETTING / DATA】.
Rotate MODIFY to select [START PHASE].

SETTING/DATA

Move the cursor down with ▼ and turn MODIFYSTART PHASE

to select [on] or [off] of the function.

on

50 on theWhen the function is turned [on], <START PHASE>LED of ○SETTING/DATA

front panel will light on.

SETTING/DATA

START PHASE

Press ► and select the fault-start-phasewith the numeral buttons or MODIFY. (0.0-359.9 ﾟ)

0.0ﾟ
SETTING/DATA

Only in quick-change-mode, both function of pre-trigger time and fault-start-phase are available.
When other mode but quick-change-mode is set, <PRETRIG> and <START PHASE>LED on the front panel
will light off, both function of pre-trigger time and fault-start-phase does not work.
The delay of fault-quick-change (quick-change-command delay output) in relation to the fault-start-command(quick-change-command direct output) is different each other according to setting of [on] or [off] of the
pre-trigger function and fault-start-phase function.
Both [off]no delay

Pre-trigger only [on]quick-change occurs after the pre-trigger-time elapses.

Fault-start-phase only [on]quick-change occurs at the fault-start-phase timing.

Both [off]quick-change both function of pre-trigger time and fault-start-phaseoccurs at the fault-start-phase timing after the pre-trigger-time elapses.

RX4718W

3-45

3.5 Operation modeQuick-change timing for Pre-trigger time of [on] 45ms and Fault-start-phase of [on] 270.0 ﾟ
MODE

NORMAL V1(V) NORMAL V2(V) NORMAL V3(V) TIMER/SWEEPHLD MODE

100.00100.00100.000.0ms

50.000

120.0

240.0

0.0

INTERVALNORMAL FREQ(Hz) NORMALφ1(ﾟ) NORMALφ2(ﾟ) NORMALφ3(ﾟ) TIMER/SWEEPMASTER/SLAVE FAULT V1(V) FAULT V2(V) FAULT V3(V) SETTING/DATASEPARATE

50.00

50.00

50.00 START PHASE

50.000

120.0

240.0

0.0

270.0ﾟ

FAULT FREQ(Hz) FAULTφ1(ﾟ) FAULTφ2(ﾟ) FAULTφ3(ﾟ)SETTING/DATA

Quick change command
Direct output
Quick change command
Delay output

Pre-trigger time 45ms

Fault start phase
Waiting time

33 Frequency Sync◯

signal output

Figure 3-18 Typical quick change start timing when pre-trigger time and fault start phase are [on]When the pre-trigger time and fault-start-phase are both set to [on], quick-change takes place when theinternal reference phase comes to 270 after 45ms of pre-trigger time setting of the fault-command.
Therefore, the time period from the fault-start-command to quick-change occurrence varies within the
maximum of one waveform (0 to 20ms for 50Hz) depending on the timing between the fault-command andinternal reference-phase.
The set value of V1 phase is 120 ﾟ and the quick change occurs the V1 phase id 150 ﾟ. Similarly, V2 is 30 ﾟand V3 is 270 ﾟ.

RX4718W

3-46

3.5 Operation mode

3.5.4

Simultaneous operation/recovery measurement mode

The simultaneous Operation/Recovery measurement mode allows the user to measure the operation-time andthe recovery-time by a single try.
54 FAULT key or [START INPUT] input of ○5 ○6 .
The operation-start-command is triggered by ○54 NORMAL or ○54 FAULTThe operation-stop-command is given by ○key (depending on the PSW mode

5 ○
6 (when Stop-setting is "ON").
setting) or Start-input○

Operationcommand

start
stop

Quick change command
Delay/direct output

Approx.0.1s

Pre-trigger output
A

CB

Trip input
Amplifier output

NormalFault

NormalFigure 3-19 Operation of simultaneous operation/recovery measurement mode
Amplifier-output is turned to fault-state from normal-state with operation-start-command, andoperation-time is defined as duration time from operation-start-command point to trip-input.
" A " described in Fig 3-16 is operation-time.
↓" B " described in Fig 3-16 is fault wait time set in advance.
Fault state of amplifier output goes on till elapse of the fault wait time " B " in order to make the relay
completely trip-status.
↓
Just after the fault wait time " B " has passed, amplifier-output is turned to normal-state from fault-state,recovery-time of trip-input (=Protection-relay-recovery-time) is measured.
" C " described in Fig 3-16 is recovery-time.
Setting procedure of fault-wait-time
62
When the simultaneous Operation/Recovery-measurement mode is selected, or SHIFT+WAIT TIME ○key is pressed, fault-wait-time can be set on the【SETTING / DATA】display.
Move the cursor down with ▼ and set fault-wait-time

SETTING/DATAWAITING TIME
0.01s

with the numeral buttons or MODIFY. (0.01-9.99s)

SETTING/DATA

In simultaneous Operation/Recovery-measurement mode, only [INTERVAL] measure is available for the timer
mode.
Since the measurement value is reset at every operation-command input, you can try to operate next
measurement without pressing TIMER CLR key.
The measurement result is displayed on the【SETTING / DATA】display.
SETTING/DATA

TS:1252.2m←Operation time(ms or s)

TR:10.759s←Recovery time(ms or s)

SETTING/DATA

RX4718W

3-47

3.5 Operation mode

3.5.5

Operation of normal sweep

The normal sweep is used to measure the operation-value (static characteristics) of a protective relay.
The amplifier-output changes continuously from the normal value to the fault value (trip-operation value
measurement) and from the fault value to the normal value (recovery-operation value measurement).


Items subject to sweep
Three parameters of Frequency, Amplitude and Phase can be swept.
But if the same value is set for normal-state and fault-state, amplifier output value of the items does notchange.
The fault value must be set to the more/less value that protective relay works well completely.
Normal sweep includes three operation modes described below.
[SWEEP]sweeps the sweep item linearly.

[1LG SWP]

sweeps keeping the 1LG setting of the amplitude value and phase value.
“3.4.2 0 1LG setting“

Make the fault value 1LG setting beforehand.
[2LS SWP]

sweeps keeping the 2LS setting of the amplitude value and phase value.
Make the fault value 2LS setting.

“3.4.2 B) 2LS setting“

Setting of sweep time
When the operation-mode is normal-sweep, the sweep-time is displayed on the【TIMER MODE/SWEEP TIME】display.

TIMER/SWEEP

0.00s

Move the cursor to the【TIMER MODE/SWEEP TIME】display

100.0 swith ▲, ▼,◄ and ► ,TIMER MODE/SWEEP

and set the sweep-time with numeral buttons or MODIFY. (1.0-1000.0s)
The elapsed time of sweep is displayed on the【TIMER/SWEEP】display.
For the manual sweep mode, set the elapsed time of sweep here.
When [100.0s] is set as sweep time on the【TIMER/SWEEP】display, the relationship between the displayed
time and the output value is as follows.
[

0.00s]: normal value[ 50.00s]: middle value of normal value and fault value[100.00s]: fault value
The output value is displayed on【NORMAL FREQ】【NORMAL VOL･PHASE 1-3】.
The following example is a display at the elapsed time of 50sec. when the normal frequency is 50.000Hz, thenormal voltages 1-3 are 100.00V and the normal phase 1-3 difference are 0.0°.
MODE

NORMAL V1(V) NORMAL V2(V) NORMAL V3(V) TIMER/SWEEP

SWEEP

50.00

50.00

50.00

50.00s50.000

45.0

-45.0

135.0

100.0 sNORMAL FREQ(Hz)NORMALφ1(ﾟ) NORMALφ2(ﾟ) NORMALφ3(ﾟ) TIMER/SWEEPMASTER/SLAVE FAULT V1(V) FAULT V2(V) FAULT V3(V) SETTING/DATASEPARATE

0.00

0.00

50.000

90.0

-90.0

0.00 MODE
270.0

SWEEP

FAULT FREQ(Hz) FAULTφ1(ﾟ) FAULTφ2(ﾟ) FAULTφ3(ﾟ) SETTING/DATA

The phase sweeps in the delay-direction when the fault value of phase is bigger than the normal value of phase,and in the lead-direction when smaller.
RX4718W

3-48

3.5 Operation mode

In Normal-sweep, Automatic-sweep and Manual-sweep are available.

TIMER/SWEEPIn Manual-sweep, " M " is displayed on the【TIMER/SWEEP】display.

M

0.00s
100.0 s

How to set either Automatic-sweep or Manual-sweep

TIMER MODE/SWEEP TIME

When automatic sweep is set, the LED of MANUAL SWEEP is turned off. To change the setting fromthe manual sweep to automatic sweep, press MANUAL SWEEP.
When manual sweep is set, the LED of MANUAL SWEEP is turned on and " M " is displayed in the line
head of the sweep position. Press MANUAL SWEEP to change the setting from the automatic sweep tomanual sweep.
How to set either Automatic-sweep or Manual-sweep
Press SHIFT+OTHER FUNC key to display the other function on the【SETTING / DATA】display.

SETTING/DATAMAN SWEEP

Rotate MODIFY and select [MAN SWEEP].
Move the cursor down with ▼ and turn MODIFY
to select [off] / [on].
[off]: Automatic-sweep[on]: Manual-sweep

off
SETTING/DATA

A) Manual sweep
In Manual-sweep, if the elapsed time of sweep is set at the【TIMER/SWEEP】display,
Amplifier-output values of parameters (Frequency, Amplitude, phase) are output in proportion to the elapsed
time setting.
60 .
And Amplifier-output values is also displayed on the Upper-display○

In order to set elapsed time,
move the cursor to 【TIMER/SWEEP】 with▲, ▼, ◄ and ► ,and set elapsed time with the numeral buttons or MODIFY dial.

TIMER/SWEEP

M

12.34s100.0 sTIMER MODE/SWEEPIn the Manual-sweep, Operation-command and Operation-start-input is not valid, but the Trip-input state canbe monitored with the <TRIP INPUT>LED on the front panel.
Therefore, the Operation/Recovery values of protective relay can be measured by monitoring the <TRIP
INPUT>LED.

RX4718W

3-49

3.5 Operation modeB) Automatic sweep
In Automatic-sweep, Sweep-time is the time that is necessary to sweep from normal-state value to fault-statevalue or from fault-state value to normal-state value.
54 or [START INPUT]○
5 ○6 .
An Sweep-start-command is given by SWEEP▲/SWEEP▼ ○An Sweep-stop-command is given by NORMAL, FAULT and STOP key.

■ Sweep operation example from the normal value to the fault value
The sweep from normal-state value to fault-state value is used to find trip-operation point of the protective
relay, so the trip-input signal needs to be in the normal status when the sweep starts.
54 NORMAL key to make Amplifier-output value to normal-state value.
Press ○
1 to○
4 needs to be in the normal-status at this time.
Trip-input of ○

54 SWEEP▼ or perform the ○5 ○6 Operation-start input, and Amplifier-output value sweeps fromPress ○
54 SWEEP▼ will light on.)normal to fault. (LED of ○

54 STOP , and the sweep will stop, and LED of STOP will light on.
Press ○And Amplifier-output value is the then value.



5 ○6 Operation-start input to sweep to fault-state value
Press SWEEP▼ again or perform ○direction. ( LED of SWEEP▼ will light on.)When [TRIP INPUT] signal turns "ON", the sweep stops (LED of STOP key will light on).



60 Upper-fluorescent-display at this time is an
The Amplifier-output value displayed on the ○Operation-value of the protective relay.

■ Sweep operation example from the fault value to the normal value
The sweep from fault-state value to normal-state value is used to find Recovery-point of the protective relay, so
the Trip-input needs to be in the operation-status ("ON") when the sweep starts.


Set PSW mode for [ALTERNATE], and press FAULT key to set Amplifier-output value to Fault-statevalue. Trip-input is turned "ON" at this time

54 SWEEP▲
Press ○

5 ○6 Operation-start input, and Amplifier-output value sweeps
or perform the ○54 will light on.)from Fault to Normal. (LED of SWEEP▲ ○When Trip-input turns to normal-status ("OFF"), the sweep stops (LED of STOP will light on).
60 Upper-fluorescent-display at this time is a
The Amplifier-output value displayed on the ○Recovery-value of the protective relay.

RX4718W

3-50

3.5 Operation mode

3.5.6

Operation of Search / DSK-Search sweep

In normal sweep mode, if the sweep rate is too fast, the measurement result of Operation/Recovery time ofprotective relay may have a large margin of error.
In order to assure more correct measurement, Search/DSK-search sweep modes can be available to cover theabove drawback.
The sweep parameters (Frequency, Amplitude, Phase), the sweep-time and the sweep-direction of the phase aresame as those described in “3.5.5 Operation of normal sweep“.
Search sweep mode is used to measure a protective relay with fast operation time. It includes three operation
modes described below.
[SRCH SWP] sweeps the sweeping items linearly.
[1LG SRCH]
sweeps keeping the 1LG setting of the amplitude value and phase value.
[2LS SRCH]
sweeps keeping the 2LS setting of the amplitude value and phase value.
DSK search sweep is used to measure a protective relay with slow operation time such as a disk type. It
includes three operation modes described below.
[DSK SWP]
sweeps the sweeping items linearly.
[DSK 1LG SRCH]
sweeps keeping the 1LG setting of the amplitude value and phase value.
[DSK 2LS SRCH]
sweeps keeping the 2LS setting of the amplitude value and phase value.
Set the fault values to 1LG setting for [1LG SRCH] and [DSK 1LG SRCH] , and to 2LS setting for [2LS
SRCH] and [DSK 2LS SRCH].

“3.4.2 0 1LG setting“, “3.4.2 B) 2LS setting“

The operation modes above are operated by each parameter of the search/DSK search sweep menu in the otherfunction.


How to set Search/DSK-search sweep menu
When the operation mode is set for Search/ DSK-search-sweep
62 MODEby ○key and MODIFY key,

the Search/DSK-search-sweep menu is displayed
61 【SETTING / DATA】 .
on the ○SETTING/DATASEARCH M
ENU

Alternatively, press SHIFT+OTHER FUC

SETTING/DATA

and MODIFY to select [SEARCH MENU].

SETTING/DATA

Move the cursor down with ▼ and turn MODIFYSWP TIMES
3

to select the sweep times [SWP TIMES].
Press ► and use the numeral buttons and MODIFYSETTING/DATA

to select the sweep times (1-10).
Press ◄ to return to the [SEARCH MENU] of the other function.

SETTING/DATA

Rotate MODIFY to select the judge time [JUDGE TIME].

JUDGE TIM

Press ► and use the numeral buttons and MODIFY

E

to select the judge time. (0.1-10.0s)
Set the trip-wait-time [TRP WAIT] following the same procedure.

SETTING/DATA
SETTING/DATA

TRP WAIT
0.1s(0.1-10.0s)[OUTPUT CUT] "ON/OFF" setting is available.

SETTING/DATA
SETTING/DATA

on:

Amplifier-output is turned off after measurement.

OUTPUT C

off:

Amplifier-output is not turned off after measurement.

UT
SETTING/DATA

RX4718W

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3.5 Operation mode

Note: The trip-wait-time is a parameter available in the DSK search sweep only.
■ Recommended settings
The following setting would assure correct measurement depending on the type of the protective relay.
Normal value:
about 70/130 % of expected Operation/Recovery value
Fault value:
about 130/70 % of expected Operation/Recovery value
Sweep time:
5 sec.
Sweep times:
3
Judgment time: 0.1 sec.

RX4718W

3-52

3.5 Operation modeA) Search sweep
When a sweep starts from the normal value to the fault value and Trip-input signal turns to ON-state, the sweep
is suspended.
When the judge time has passed, the Trip-input signal ON/OFF-state is checked again, and the sweep will beresumed in the opposite direction if the Trip-input signal remains ON-state, and in the same direction if the
Trip-input signal is OFF-state.
As the first ON-state of Trip-signal can be seem to be attributed to chattering if the Trip-signal is recovered to
OFF-state during the judge time span, then the sweep will be resumed in the same direction.
Since the sweep time increases twofold at every resuming, that is, the sweep runs at slower rate, a moreaccurate measurement can be obtained in a shorter time.
The user can select either Operation-value or Recovery-value according to selecting SWEEP▼ / SWEEP▲
key for sweep start trigger.
SWEEP▼ : Operation-value detection
SWEEP▲ : Recovery-value detection
Fault value
×2

×8

×4
A
Normal value

①

②

A

A

③

④

⑤

×16

A

⑥

A: Judge time⑦

Trip signal input

ON-state

OFF-state
Figure 3-20 Operation of search sweep①When SWEEP▼ is pressed, the sweep will start from the normal value to fault value
in the set sweep time.
[OPRATE VAL] and [1 TIMES] are displayed on the 【SETTING / DATA】.
②When a trip-signal operates(ON), the sweep is suspended.

SETTING/DATAOPRATE VA
L
SETTING/DATA③When the set judge time has passed, the sweep is resumed toward the normal value if the trip-signal remains
ON-state, and toward the fault value again if the trip-signal returns to OFF-state.
The sweep time is two times the first time.
④At the next trip-signal change, the sweep will be suspended.
⑤When the judge time has passed, the sweep is run in the opposite direction if the trip-signal remains as in (4)above, and in the same direction if it is changed. The sweep time is two times the previous time (i.e., fourtimes the first or the set time). The indication of the sweep run changes to [2 TIMES], then to [3 TIMES] andso on at every sweep from normal value to fault value.
⑥The above steps are repeated while the sweep time doubled at each run.
⑦When the set times of fault-direction-sweep-run have been performed, the test is finished and the LED of the
STOP lights up. Now the output is turned off if the output-cut is set for [on].
Since the test ends with the last sweep run in the fault direction in the above procedure, this is operation
RX4718W

3-53

3.5 Operation mode

value detection.
If the test is started with a press on the SWEEP▲, then the test ends after execution of set times ofnormal-direction sweep run, this is recovery value detection.
[RECOVE VAL] is displayed on the 【SETTING / DATA】.
If the system fails to detect any operation or recovery value, [ERR] will beshown to finish the measurement.

RX4718W

3-54

SETTING/DATARECOVE VAL
1 TIMESSETTING/DATA

3.5 Operation modeB) DSK search sweep
Disk type protective relays have longer operation-time, which makes it takes much time to measure Operation/Recovery-value. Therefore, the test begins with a Quick-change to the fault-state value, then, after confirming
Trip-input operation (On-state), a sweep starts from fault value to normal value.
Fault value
A: Judge time
×4

×2

×8

×32
×16

Trip waiting
time

A
Normal value

①

②

③

A

A

④

⑤

⑥

A

A

⑦

⑧

Trip input

ON-state

OFF-state

Figure 3-21 Operation of DSK search sweep①

Press the SWEEP▼, and a quick-change to the fault value occurs.
Indication of [OPRATE VAL] and [1 TIMES] are shown.

SETTING/DATAOPRATE VAL
1 TIMESSETTING/DATA②

When the set judge-time has passed, and if the trip-input signal is keeping
ON-state, the sweep is started from the fault value to the normal value in the set
sweep rate.

③

When the trip-input signal returns to OFF-state, the sweep is suspended.

④

When the set judge-time has passed, the sweep is resumed toward the fault value if the trip-input signal
remains OFF-state, and toward the normal value if the trip-input signal is ON-state.
The sweep time becomes two times the first time.

⑤

At the next trip signal change, the sweep is suspended.

⑥

When the judge-time has passed, the sweep is run in the opposite direction if the trip-input remains as in
the previous run, and in the same direction if it is changed. The sweep time is two times the previous time(i.e., four times the first or the set time). Every time the sweep is run in the fault direction, theSweep-times displayed increases such as [2 TIMES] and [3 TIMES].

⑦

The above steps are repeated while the sweep time is doubled at each run.

⑧

When the set Sweep-times of fault-direction-sweep-run have been performed, the test is finished and the
LED of the STOP lights up.
Now the Amplifier-output is turned off if the output-cut is set for [on].
Since the procedure ends with the last sweep run in the fault direction in the above procedure,
this is Operation-value detection.

RX4718W

3-55

3.5 Operation mode

If the test is started with pressing SWEEP▲ key, then the test comes to an end after execution of set
SETTING/DATA

Sweep-times of normal-direction-sweep-run.

RECOVE VAL

This is recovery value detection.

1 TIMES[RECOVE VAL] is displayed on the 【SETTING / DATA】.
If the system fails to detect any Operation/Recovery-value, [ERR] will be shownand the measurement will be finished.

RX4718W

3-56

SETTING/DATA

3.5 Operation mode

3.5.7

Operation of 95 relay test mode (frequency relay)

In the Frequency-relay (95 relay) test mode, the following four data can be obtained by single operation.
trip-operation frequency, recovery frequency, operation time and recovery time.
54 key or an Operation-start-input○
5 ○6 .
An operation start command is given by FAULT, SWEEP▼ ○54 key.
An operation stop command is given by NORMAL and STOP ○When the frequency relay test mode is set, the frequency setting is automatically set for [INTERNAL].
In frequency relay test mode, several parameters must be set in the frequency relay test menu.


Setting procedure of the frequency relay test menu
When frequency relay test mode is selected for the operation mode, the frequency relay test menu isdisplayed on the【SETTING / DATA】. [FREQ RELAY] can be also selected by pressing
SHIFT+OTHER FUNC and rotating MODIFY.

SETTING/DATAFREQ RELAY
SETTING/DATA

Move the cursor down with ▼ and rotate MODIFY to select the

CROSS FREQCROSS FREQ

cross frequency [CROSS FREQ].

SETTING/DATA

48.500Press ► and use the numeral buttons or MODIFY to set theSETTING/DATA

cross frequency. (10.000～200.000Hz)

SETTING/DATA

Press ◄ to return to [FREQ RELAY].

SWEEP RATE

Rotate MODIFY to select the sweep rate [SWEEP RATE].

1.000 H/s

Press ► and set the sweep rate

SETTING/DATA

with the numeral buttons or MODIFY. (0.001-9.999Hz/s)

SETTING/DATAHOLD TIME

0.01 sSETTING/DATA

The hold time is set by the same procedure. (0.01-650.0s)

SETTING/DATAAMP QC[on] / [off] of the Amplitude-Quick-Change is also set by the same procedure.

on
SETTING/DATA

stop

start

Operation command
start/stop
Quick-change command
Delay/direct output

Approx.0.1

Approx.0.1s

Pre-trigger output
Normal frequency(Start frequency)
Operation frequency
Cross frequency

Recoveryfrequency

Hold time
Recoverytime

Fault frequency(Hold frequency)

Trip input

Operation
time

Figure 3-22 Operation of frequency relay test mode

RX4718W

3-57

3.5 Operation mode

■ Amplitude quick change
In the frequency relay test mode, the output amplitude can be quickly changed just before the frequency starts
to sweep.
If the amplitude quick change setting in the frequency relay test menu is turned [on], the amplitude fault value
setting is available. The frequency sweep starts just after the amplitude output is quickly changed to the fault
value.
When the frequency sweep is over, the amplitude output returns to the normal value.
When the amplitude quick change setting is [off], the amplitude fault value setting is not available.

■ Display of measurement data
The measurement results are displayed on the【TIMER/SWEEP】,【TIMER MODE/SWEEP TIME】and【SETTING / DATA】.
TIMER/SWEEP

FS:

53.965←Operation frequency(Hz)TS:

966.3m←Operation time(ms or s)

TIMER/SWEEPSETTING/DATA

FR:

52.615←Recovery frequency(Hz)TR:

383.1m←Recovery time(ms or s)

SETTING/DATA

When the measurement fails, the result is displayed as [----------].

RX4718W

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3.5 Operation mode

3.5.8

Operation of SOR quick change mode (Step-out Relay)

SOR quick mode is a mode to check the operation of a Step-out Relay.
An operation start command is given by FAULT or operation start input.
An operation stop command is given by NORMAL and FAULT.
SOR quick change mode allows to shift four preset status, STEP1 (normal value), STEP 2, STEP 3 and STEP 4(fault value) in a preset dwell time.
Dwell time of STEP 1

T1 (0.010-9.999s, resolution of 1ms)

Dwell time of STEP 2

T2 (0 and 0.010-9.999s, resolution of 1ms)

Dwell time of STEP 3

T3 (0 and 0.010-9.999s, resolution of 1ms)

Dwell time of STEP 4

T4 (0 and 0.010-9.999s, resolution of 1ms)

Press SHIFT+DISPLAY SW to set STEP 2 and STEP 3 and T1 through T4.
MODE NORMAL V1(V) NORMAL V2(V) NORMAL V3(V) TIMER/SWEEP

SOR

0.00

0.00

0.00

T1:0.010s

STEP2

0.0

0.0

0.0

T2:0.000s

NORMAL FREQ(Hz) NORMALφ1(ﾟ)NORMALφ2(ﾟ) NORMALφ3(ﾟ) TIMER/SWEEP TIMEMASTER/SLAVE FAULT V1(V) FAULT V2(V) FAULT V3(V) SETTING/DATA

SOR

0.00

0.00

0.00

STEP3

0.0

0.0

0.0

FAULT FREQ(Hz) FAULTφ1(ﾟ) FAULTφ2(ﾟ) FAULTφ3(ﾟ)T3:0.000s
T4:0.000s
SETTING/DATA

The normal side is STEP 2 and the fault side is STEP 4. Move the cursor with ▲, ▼, ◄ and ► , and set with
the numeral buttons and MODIFY. The previous display will be brought back by pressing SHIFT+DISPLAY
SW again.
When the operation starts, the output shifts by the preset dwell time of each step in order of STEP 1, STEP 2,
STEP 3 and STEP 4.
STEP 4

STEP 3

STEP 2STE

φ1: STEP 1 phase

Figure 3-23 Setting example of each step in SOR test mode (vector diagram)
When the dwell time of STEP 4 has passed, the output returns to STEP 1.
If some change occurs in trip input during the shift, [TRIP CHANGE] is displayed on the 【SETTING / DATA】,
and if no change occurs, [NO TRIP CHANGE] is displayed.
When T2, T3 or T4 is set to " 0 ", the output can be stopped (fixed) with the step setting. To return to STEP 1 at
this time, press NORMAL (operation stop command).

RX4718W

3-59

3.6 Other basic operation

3.6

Other basic operation

Other function, panel setting memory function and control power output operation are described here.

3.6.1

Other function

Other functions include rarely used function and function which operation mistake needs to be avoided.
To set the other function, press SHIFT+OTHER FUNC
to display the other function which the user wish to use on the【SETTING /DATA】using MODIFY.

SETTING/DATAWAITING TIME
0.01s
SETTING/DATA

The following is a list of other functions.
Fault waiting time

[OP:RECOV]“3.5.4 Simultaneous operation/recovery measurement
mode“

Freq test relay[FREQ RELAY]“3.5.7 Operation of 95 relay test mode (frequency
relay)“

Pre-trigger time

[PRETRIG TIME]“3.5.3.C) Pre-trigger time and fault start phase“

Fault start phase[START PHASE]“3.5.3.C) Pre-trigger time and fault start phase“Line calculation[LINE CALCULATION]“3.4.2 C) Line voltage calculation function“

Amplifier input selection [INPUT SEL]

“4.2 Amplifier input signal selection“

Chattering correct“3.5.1.B) Setting of trip input chattering correction[CHATTERING]

function“
Waveform selection[WAVE SELECT]“3.4.3 Waveform selection“

Harmonic 1[HARMONIC 1]“3.4.3.A)

RX4718W

3-60

3.6 Other basic operation

Setting of harmonic-1 parameters“
Phase setting[PHASE MODE]“3.4.2 Setting of amplitude and phase“

Search･DSK menu

[SEARCH MENU]“3.5.6 Operation of Search / DSK-Search sweep“Timer setting[TIMER MENU]“3.5.3.A) Timer“

Stop setting[STOP FUNC]“3.5.1.D) Stop Function of operation start input “Start input[START INPUT]“3.5.1.C) Setting of operation start input logic“

Phase rotation[Rotate Phase]“3.4.2 D) Phase rotation“

Trip phase select[TRIP PHASE]“4.1.3 E) Trip phase selection function“

Switch control[SW CTRL]“4.1.3.D) Selector communication function“

PSW mode[PSW MODE]“3.5 Operation mode“

Beep setting[BEEP]“3.6.1. A) Beep setting“

GPIB setting[GPIB]“5.2.3 Setting of GPIB“

RS-232C setting[RS-232C]“6.2.4 Setting of RS-232C“RX4718W

3-61

3.6 Other basic operationA) Beep settingThis function turns on and off the beep sound when buttons are pressed and when error occurs. Note that the
beep does not sound at overload when it is turned off.
Press SHIFT+OTHER FUNC to display the other function on the【SETTING / DATA】.
Rotate MODIFY and select [BEEP].

SETTING/DATA

Move the cursor down with ▼ and turn MODIFY to select [on] or [off].

BEEP
on

3.6.2

Panel setting memory

SETTING/DATA

This function allows writing and reading of the memory number from 0 to 31 on the panel. The setting
parameters for writing and reading is the same as “Table 3-1 List of Initial Values of Panel Setting “.
(Memory No. 32 is a default value for 50Hz and No. 33 is a default value for 60Hz and read only.)
Once test conditions have been set and written into the memory, they can be retrieved on the next test occasion,
the user does not need setting them again.
In addition, the user can add comment when writing. Comment can be written within ten characters including
numbers, [] and []. (Also alphabets can be used in GPIB and RS-232C.)
The written memory data of No 1 to 31 can be cleared.
Memory write, read and comment input
53 to display the panel setting memory on the【SETTING / DATA】.
Press MEMORY NO ○SETTING/DATA

Rotate MODIFY to select the memory to be operated

MEMORY 12

from [MEMORY 0] to [MEMORY 31].


Write

SETTING/DATA

53 to write in the selected memory.
Press SHIFT+WRITE ○[NOW WRITING] is displayed during writing.


SETTING/DATAMEMORY 12
NOW WRITING

Memory reading

SETTING/DATA

Press SHIFT+READ ○53 to read the selected memory. [NOW READING] is displayed during reading.

When memory reading is executed, the output turns off in all outputs for safety.
Comment input
Move the cursor down with ▼ and input the comment with numeral buttons, then set with ENTER.
SETTING/DATA■ All memory clear

53 to display the panel setting memory on the【SETTING / DATA】.
Press MEMORY No ○Rotate MODIFY to select [MEMORY CLR] and move the cursor down with ▼,then, clear the memory with ENTER key.

RX4718W

3-62

MEMORY CLR
EXE

SETTING/DATA

4. Practical operation

4.1
4.1.1
4.1.2
4.1.3
4.2
4.3
4.4
4.4.1
4.4.2
4.4.3

RX4718W

Master/slave function of this series ······················· 4-2
Master/slave setting ·········································· 4-2
Master/slave connection ···································· 4-3
Master/slave operation ······································ 4-5
Amplifier input selection ····································· 4-6
Operation of extended response input ··················· 4-9
Operation in combined system with other type ofunits····························································· 4-10
Synchronization of output frequency ··················· 4-10
Synchronization of quick change operation ·········· 4-11
Connection with 4705A ···································· 4-12

4-1

4.1 Master/slave function of this series

4.1

Master/slave function of this series

Units in this series allow to be combined into a multi-phase system by connecting them one to others with asupplied daisy-chain control signal cable to make a master/slave configuration.
In a master/slave configuration, performance will be as follows:

The frequency of all slave devices that are connected will be synchronized with that of the master device,and the phase of the master device will be the standard phase. Frequency can not be set from a slave device.

Phase setting in any of master device or slave devices can be used in the same way as the use in a single
unit.



Operation in the master device causes a simultaneous quick change in all devices connected in themaster/slave system. The timing of quick change is dominated by the master device.

4.1.1

Master/slave setting

Master/slave configuration includes [SEPARATE], [MASTER] and [SLAVE].
The setting item is displayed on the【SETTING / DATA】.
When the master/slave setting is changed, the output is turned off in all outputs for safety.


Setting procedure
62 to display【MASTER / SLAVE / SEPARATE】
Press MASTER/SLAVE ○SETTING/DATA

on the【SETTING / DATA】.
Select the setting with MODIFY and press ENTER.

MASTER SLAVESEPARATE
SETTING/DATA■ [SEPARATE]
RX4718W operates separately. Use this setting when RX4718W is used as a single unit.
When RX4718W is used as a single unit, remove the daisy-chain master/slave control signal cable.
■ [MASTER]
This makes RX4718W a master device. The other devices connected to master devoice with a daisy-chain
master/slave control signal cable (excluding 4741) will be destined for slaves (max. 3 devices).
■ [SLAVE]
This makes RX4718W a slave device. When the other device connected to slave devices with a daisy-chain
master/slave control signal cable becomes a master device, this device will be destined for a slave.
【NORMAL･FAULT FREQ】on the slave device displays [-------].

MASTER/SLAVESLAVE------FAULT FREQ

RX4718W

4-2

4.1 Master/slave function of this series

4.1.2

Master/slave connectionTurn off the power of all devices, and pile up devices (max. 4).

Connect the supplied power cable to the power input of the bottom device.

Use supplied daisy-chain power cables and connect the device to the upper device in turn.
“2.3 Grounding and power supply“
RX4718W has 15A of a maximum usable current capacity.
Avoid exceeding this value in useConnect a supplied daisy-chain control signal cable across the connectors of the parallel control signal inorder. (These connectors and the cable do not distinguish between input and output.)Trip and operation start signals must be connected to the master device.
Do not connect them to any slave devices.

Figure 4-1 Master/slave power connection

RX4718W

4-3

4.1 Master/slave function of this series

Figure 4-2 Connection of a daisy-chain master/slave control signal cable

RX4718W

4-4

4.1 Master/slave function of this series

4.1.3

Master/slave operation

A) Synchronization of operation mode
When the operation mode of a master device is changed, the operation mode of a slave device willautomatically change to the same mode as the master device.
The slave device will operate according to the operation command of the master device.
When the operation mode is different between the master device and the slave device, they do not operateproperly.
When the operation mode of the master device does not exist in the slave device, an error occurs. In this series,
the following operation modes exist in the RX4718W only.
[1LG SWEEP], [2LS SWEEP], [1LG SRCH], [2LS SRCH], [DSK 1LG SRCH], [DSK 2LS SRCH]
In the sweep operation mode, the parameters of the slave devices must be set to the same parameters of themaster device.
When the settings are different between master device and slave devices, the operation does not work well.
Normal sweep[SWEEP], [1LG SWEEP], [2LS SWEEP]
Search sweep[SRCH SWEEP], [1LG SRCH], [2LS SRCH],DSK search sweep[DSK SWEEP], [DSK 1LG SRCH], [DSK 2LS SRCH]
Frequency relay test mode
[FREQ RLY]

B) Simultaneous setting change
If a master device changes amplitude and phase value with MODIFY dial when the cursor of a slave device ison the setting position for amplitude and phase, the value where the cursor is on the setting position of theslave device changes simultaneously. (Three phases at once is available too.)In order to disable this function, press CURSOR ON/OFF of the slave device. The cursor of the slave device isdisappeared. (LED of CURSOR ON/OFF lights on.)Press CURSOR ON/OFF again, and the cursor of the slave device will appear to enable the function. (LED of
CURSOR ON/OFF lights off.)C) All outputs on/off
If ALL OUTPUT key of a master device is pressed, all outputs of slave devices also turn on/off.
However, since all-outputs-on function can be risky, the internal dip switch can disable all-outputs-on functionof the slave device.
“2.2 Setting of internal dip switch“
All-outputs on /off command can be received by 4717W, 4718W and 4723 only.

D) Selector communication function
This function allows turning ON and OFF the synchronization of R, S, and T between the devices of this series
equipped with an output selector for master/slave operation.
Setting procedure
Press SHIFT+OTHER FUNC to display the other function on the【SETTING / DATA】.
Rotate MODIFY and select [SW CTRL].

SETTING/DATA

Move the cursor down with ▼ and turn MODIFYSW CTRL

to select [ON] or [OFF].

on
SETTING/DATA

RX4718W

4-5

4.1 Master/slave function of this seriesE) Trip phase selection function
This function is available when this series 4741 is the following version.
Japanese version 1.32, 1.34, 1.42
English version

1.33, 1.35, 1.43

When 4741 is a master device, and test mode is total test mode or line PD, output amplitude of RX4718W will
be set to " 0V " (trip status) during the " OFF state " of trip-signal according to output-channel setting.



Setting procedure
Press SHIFT+OTHER FUNC to display the other function on the 【SETTING / DATA】.
Rotate MODIFY and select [TRIP PHASE].

SETTING/DATA

Move the cursor down with ▼ and turn MODIFYTRIP PHASE

select a trip phase, and press ENTER.

3PHASESETTING/DATA[3 PHASE]
[R]
[S]
[T]
[R-S]
[S-T]
[T-R]

All phases are tripped.
V1 only is tripped.
V2 only is tripped.
V3 only is tripped.
V1 and V2 are tripped.
V2 and V3 are tripped.
V3 and V1 are tripped.

The following figure shows the performance of RX4718W when the trip phase is set as [R-S].
Setting of 4741

[MASTER], [TOTAL TEST], [RETRIP], [3 PHASE SIMUL]

Setting of 4718

[SLAVE], [R-S]

4741 Start-up/Start-up delay

Trip input signal

Trip

RetripRecloseVoltage output V1 (R) Normal

Fault

Zero

Fault

Zero

NormalVoltage output V2 (S) Normal

Fault

Zero

Fault

Zero

NormalVoltage output V3 (T) Normal

Fault

Normal

Fault

Zero

NormalFigure 4-3 Performance of trip phase selection function

RX4718W

4-6

4.2 Amplifier input signal selection

4.2

Amplifier input signal selection

The internal synthesizer signal set in “3.4.1 Frequency setting“ through “3.4.3 Waveform selection“ is output to27 ○28 with a range full-scale of 1 Vrms. This output is used to monitor the internal
the external signal output○

synthesizer signals and as a signal source of an external booster. The external signal output can be set whether
to set the amplitude for 0 when the amplifier output is turned off. This setting can be done by an internal dip
switch.
“2.2 Setting of internal dip switch“■ Internal [INTERNAL]
The amplifier input signal is set to the internal synthesizer signal. This is a usual setting.

RX4718W

4-7

4.2 Amplifier input signal selection■ External output [EXT OUT]
The external signal output drives an external booster amplifier. All LEDs of the range keys of the output
selected are turned off.
When the external signal output is 1 Vrms, the output amplitude of the external booster will be set as below.
Rotate MODIFY to select the external output [EXT OUT] and press ENTER,
then, the external booster amplitude is displayed on the 【SETTING / DATA】.

SETTING/DATA

Set the amplitude with the numeral buttons or MODIFY.
Setting range of voltage output

V3

0.0-999.99V

100.0VEXT OUTSETTING/DATA

When the external booster amplitude is [100.0V] and 【NORMAL･FAULT VOLTAGE】indicates [50.0V], theexternal signal output amplitude is 0.5Vrms.

NORMAL V3(V)

50.00
0.0

External current

NORMALφ3 (ﾟ)booster

NORMAL V3(V)

Output of 0.5Vrms

50.00

Output of 50V

100V/1Vrms

30.0
FAULTφ3 (ﾟ)27 ○28Depending on OUTPUT-ON/OFF-SW of this amplifier, the output amplitude of the external signal output○

is turns on/off according to the internal dip switch setting.
DIP-SW is not in 0-setting
error will occur.
<ON> LED stays off, and the amplifier output of the unit will not be output.
DIP-SW is in 0-setting<ON> LED will be turned on and off, but the amplifier output of the unit will not be output.
27 ,○28 becomes and the external booster output also becomes " 0 V ".
The amplitude of external output ○“2.2 Setting of internal dip switch“

RX4718W4-8

4.3 Operation of extended response input

4.3

Operation of extended response input

The extended response input function can extend the trip input up to 255 channels by connecting an optional
expansion box for response signal to the extended external response input.
Setting procedure
Press SHIFT+EXT RES INPUT to display the extended response input on the 【SETTING / DATA】.
SETTING/DATA

Use the numeral buttons or MODIFY to set the channel of trip input. (0～255) EXT RESPNS0
SETTING/DATA" 0 " setting is for a trip input of RX4718W and " 1 through 255 " setting are for the response input of an
expansion box for response signal.
！

CautionTrip input of RX4718W always operates when signal input occurs regardless of the channel setting of
the trip input.
When the optional expansion box for response signal is connected to the expanded external response
input and the channel is set to the response input of the expansion box (1 to 255), connect nothing to
the trip input of RX4718W.
If connection is made by mistake, it is dangerous because the trip input is connected in parallel to the
response input of the expansion box inside of RX4718W.

Expansion box
Response input Response input

16～31

1～15

Expansion box
voltageconta

Channel setting 1 - 31

Response input Response input

48～63

32～47

voltagecontacChannel setting 32 - 63
To Channel setting
64 - 255

The response input of an expansion box for response signal selects the voltage input and the contact input witha toggle switch of the expansion box.
When the voltage input is selected, the threshold voltage will be set as +2.5V, +8V and +50V by a slide switchof the judge voltage.

RX4718W

4-9

4.4 Operation in combined system with other type of units

4.4

Operation in combined system with other type of units

RX4718W operates together with other type of units because of having operation of frequency synchronizationand simultaneous quick change.
The frequency synchronization signal terminals and quick change signal terminal are on the right and left sidepanel.

4.4.1

Frequency Synchronization

When the frequency synchronization signal input/output is used, it will take about 1 second until thesynchronization becomes stable.
Therefore, this disables the functions of frequency sweep and frequency quick change.
To synchronize the frequency of RX4718W with other systems, connect the synchronization signal of othersystem to the frequency synchronization signal input of RX4718W and select the external synchronization for“3.4.1 Frequency setting“

the frequency mode of RX4718W.

To synchronize the frequency of other systems with RX4718W, connect the frequency synchronization signal
output of RX4718W to the frequency input of other system.

The frequency synchronization input/output signal of RX4718W contains two types: one for 4705A (a binding
post terminal)
35 freq sync sig out (for 4705A)◯:

Logic signal,

falling edge is phase of " 0 ﾟ"

34 freq sync sig in (for 4705A)◯:

Logic signal,

falling edge is phase of " 0 ﾟ"

34
Threshold voltage of ◯RX4718W

High level: +2.5V
Low level: +1.5V

4-10

4.4 Operation in combined system with other type of units

4.4.2

Synchronization of quick change operation

For synchronizing the quick change operation, select the quick change mode for the operation mode ofRX4718W and use each quick change signal terminal.
“3.5 Operation mode “, “3.5.3 Operation of quick change mode“
Quick change signal terminals of RX4718W have two types: one for 4705A (a binding post terminal).
Signal output of RX4718W to synchronize the quick change operation of RX4718W with other system
Quick change command direct output (for 4705A)
This is a logic signal and turns to Low when RX4718W is in operation.
In the quick change mode, when this signal changes to Low, the output of RX4718W quickly changes tofault after the pre-trigger time and the fault start phase.
“3.5.3. C) Pre-trigger time and fault start phase“Quick change command delay output (for 4705A)
This is a logic signal which changes when the output of RX4718W quickly changes.
It turns to Low when fault is output.

■ Signal input of RX4718W to synchronize the quick change operation of other system with
RX4718W


Operation start input (for 4705A)
This is a signal input to start the quick change of RX4718W externally. The signal input includes a contact
input and a voltage input. When this signal operates, the output of RX4718W quickly changes after the
pre-trigger time and the fault start phase.
Voltage input threshold voltage

High level: +2.5V
Low level: +1.0V

Quick change command input (for 4705A)
This is a logic signal and RX4718W outputs the fault when it is Low.
Threshold voltage

RX4718W

High level: +2.5V
Low level: +1.0V

4-11

4.4 Operation in combined system with other type of units

4.4.3

Connection with 4705AA) Individual setting of pre-trigger time and fault start phase
The following connection allows setting the pre-trigger time and the fault start phase of RX4718W and 4705A
individually and causing simultaneous quick change. RX4718W starts operation.

RX4718W

RX4718W: FREQ SYNC SIG OUT↓
4705A:SYNC INPUT
Select [EXT] for the frequency key of
4705A
4705A

RX4718W

RX4718W: FAULT CONTROLDIRECT OUT↓
4705A :REMOTE INPUT
4705A

Power
sourceAC200V

Figure 4-4 Connection diagram for individual pre-trigger time and fault start phase setting in 4705A

RX4718W

4-12

4.4 Operation in combined system with other type of units

Operation mode : [HLD MODE],
FAULT

ReleasePress

Timer mode : [INTERVAL],

Timer Automatic Recovery:[on](PSW mode is [ALTERNATE])

Quick change commanddirect output
Quick change commanddelay output

Approx. 0.1s
Delay by the pre-trigger time andthe fault start phase of RX4717
RX4718W

Pre-trigger output

Trip input
Amplifier output

NormalFault

Normal

PRE TRIGOUT
Delay by the pre-trigger time andthe fault start phase of 4705A

FALT OUT

Amplifier output

Approx. 0.1s
Normal

Fault

4705A

NormalFigure 4-5 Operation when the pre-trigger time and the fault start phase are set individually in
4705A

RX4718W

4-13

4.4 Operation in combined system with other type of unitsB) Connection for simultaneous quick change to fault
To quickly change RX4718W and 4705A to fault simultaneously, make either of the following
connections/settings.
When the quick change command delay output of RX4718W is connected to REMOTE INPUT of 4705A,
turn off the pre-trigger time and the fault start phase of 4705A.



When the quick change control signal output or quick change command delay output of RX4718W isconnected to FAULT CONTROL INPUT of 4705A, the pre-trigger time and the fault start phase of 4705A
does not available.

RX4718W

RX4718W: FREQ SYNC SIG OUT↓
4705A:SYNC INPUT
Select [EXT] for the frequency keyof 4705A

4705A

RX4718W : QUICK CHANGE
CONT SIG OUT↓
4705A: FALT CONTROL INPUT

RX4718W

4705A

Power
sourceAC200V

Figure 4-6 Connection diagram for simultaneous quick change with 4705A

RX4718W

4-14

4.4 Operation in combined system with other type of units

Operation mode [HLD MODE], Timer mode [INTERVAL], Timer automatic recovery [on]FAULT

Releasepress(PSW mode is [ALTERNATE])

Quick change commanddirect output
Quick change commanddelay output

Approx. 0.1s
Delay by the pre-trigger time and thefault start phase of RX4718W
RX4718W

Pre-trigger output

Trip input
Amplifier output

NormalFault

Normal

FALT
OUT
4705A
Amplifier output

NormalFault

NormalFigure 4-7 Operation for simultaneous quick change with 4705A

RX4718W

4-15

5. GPIB interface

5.1
5.1.1
5.1.2
5.1.3
5.1.4
5.1.5
5.1.6
5.1.7
5.2
5.2.1
5.2.2
5.2.3
5.2.4
5.2.5
5.3

RX4718W

Overview of GPIB ············································· 5-2
GPIB specifications ··········································· 5-2
Signals on bus line and their behavior ··················· 5-3
GPIB handshake ·············································· 5-4
Data transmission example ································· 5-5
Specifications of talker functions ·························· 5-6
Specifications of listener functions ························ 5-6
Multi-line interface messages ······························ 5-6
RX4718W GPIB interface ··································· 5-8
Specifications ·················································· 5-8
Notes on handling GPIB ··································· 5-12
Setting of GPIB ·············································· 5-13
Remote/local behavior ····································· 5-14
Setting program codes ····································· 5-15
Program code list ··········································· 5-17

5-1

5.1 Overview of GPIB

5.1

Overview of GPIB

GPIB is a general-purpose interface bus system for digital devices. It was approved by Instituteof Electrical and Electronics Engineers (IEEE) in 1975 and is used to standardize the remotecontrollers of the instrumentation and peripheral devices and data I/O transfer.
By embedding the interface that matches the GPIB standard in each controller and peripheraldevices, the devices can be compatible through the interface connectors.
This interface bus can connect the maximum of 15 devices on a bus. Data can be transferred inaccordance with the three-line handshake method, enabling the secure data transmission even if thesending side and the receiving side use different transfer speed devices.
GPIB has many names, such as IEEE-IB, IEEE-488 bus, HP-IB, standard interface bus, or byte
serial bus. The official name of GIPB is “IEEE Std. 488-1978: IEEE Standard Digital Interface for
Programmable Instrumentation”.
GPIB bus and IEC bus are the same standard with the exception of the connector. Using the conversion
connector can connect the two.

5.1.1

GPIB specifications(1)

Total cable length･･･････････････････････････････････････20m or less(2)

Cable length between devices(3)

Number of connectable devices (including controllers)(4)

Transfer method(5)Transfer speed(6)

Data transfer･･････････････････････････････････････

8-bit parallel(7)

Signal lines

・Data bus

8･･････････････････････････ 4m or less･･････15units or less･･･････････････････････････････････････Three-line handshake････････････････････････････････････････1M bytes/second (maximum)････････････････････････････・Control bus･･････････････････････

8

Handshake bus (DAV, NRFD, NDAC)
Control bus (ATN, REN, IFC, SRQ, EOI)・Signal/system ground(8)

Signal logic

RX4718W

8･･･････････････････････････････････････････････････

Negative logic

・True ：

Low･･････････････ ･･･････ ･･･

0.8V or less・False ：High･････････････････

2.0V or more

5-2･･･････

5.1 Overview of GPIB
(9) Interface connector

Figure 5-1 Interface connector

5.1.2

Signals on bus line and their behavior

GPIB bus line consists of 24 lines. They are eight data lines, eight control lines, and 8 signal/system
ground lines■ Data bus (DIO1 to DI08)
Data bus is I/O line that are used to input and output address and command information. They are
distinguished by ATN lines. DI01 is used as LSB.
■ Handshake bus (DAV, NRFD, and NDAC)
The three line handshakes each other to perform secure data transmission.
DAV(Data Valid)
It indicates that the signal sent from a talker or controller to a DI0 line is effective.



NRFD(Not ready for data)
It indicates that the listener is ready to receive a signal from a DI0 line.



NDAC(Not data accepted)
It indicates that the listener has finished data reception.

RX4718W

5-3

5.1 Overview of GPIB
■ Management bus (ATN, REN, IFC, SRQ, and EOI)ATN(Attention)
It is a line sent from a controller that indicates which the signal sent from a DI0 carries data, address,
or command.



REN(Remote enable)
It is a line sent from a controller that switches between remote control and local control.

IFC(Interface clear)
It is a line sent from a controller that initializes the interface of each device.



SRQ(Service request)
It is a management line that invokes a controller from a talker or listener. When the controller
detects this signal, it starts performing serial polling or parallel polling.

EOI(End or identify)
It is used as an identification signal line for data end signal line or parallel polling sent from atalker.

5.1.3

GPIB handshake

This section explains GPIB handshake using data transfer as an example. The handshake is also
performed when addresses or commands are transferred.
When GPIB handshake takes place, the state of every listener is checked. Until all listeners finish datatransfer, talkers do not transfer new data, enabling secure data transfer even if the low speed device isused. The handshake behavior is decided by the state of the following signals:
NRFD ＝High

All listeners are ready for data reception.

DAV

A talker transmits effective data on the data bus.

＝Low

NDAC ＝High

All listeners finished data receptions.

The handshake timing chart is shown below.
Waiting data
Processing data

(Listener)

Ineffective data

(Talker)

Effective data
End data reception
Not received data yet(Listener)(receiving data)
Data bus
signalEffective data

Figure 5-2 Handshake timing chart

RX4718W

5-4

5.1 Overview of GPIB
1.

All listeners are ready for data reception.

2.

The talker outputs data to a data line. (This can be performed before step 1.)

3.

The talker checks NRFD. If NRFD is set to High, the talker sets DAV to Low to notify the listenerthat the data is efficient.

4.

When DAV is changed to Low, the listener starts reading data, sets NRFD to Low to notify thetalker that data is being processed. When data input is finished, each listener set NDAC to High.
NDAC on the bus is the OR of listeners’ NDAC.

5.

When all listeners finish data reception, NDAC is changed to High (the result of OR output) toindicate the talker of the end of the data reception.

6.

The talker sets DAV to High to notify the listener that the data on the data bus is not effective.

7.

The listener checks DAV is changed to High, set NDAC to Low, and finishes handshake with data
reception uncompleted.

8.

All the listeners finish data processing and indicate that they are ready for data reception.

5.1.4

Data transmission example

Shown below is an example of three-line handshake data transmission.
Data “ABC” is transmitted with delimiter “CR/LF”.

Figure 5-3 Data transmission example

RX4718W

5-5

5.1 Overview of GPIB

5.1.5

Specifications of talker functions



The number of talkers that can be used simultaneously on GPIB is one.



When ATN signal of a controller is “H”, the talker transmits data to the listener.

When data is being transmitted, handshake (source handshake) is performed automatically.



The talker sends a service request (SRQ) to a controller.



A talker can be used either in the local mode or the remote mode.



Talker functions should be disabled under the following conditions:
When the talker address of another device is received.
When the talker is specified as a listener.
When an untalk (UNT) is received.
When IFC is received.

5.1.6

Specifications of listener functions



Two or more listeners can be placed on GPIB.

When ATN signal of a controller is High, the listener receives data from the talker.

When data is being received, handshake (accept handshake) is performed.



Listener functions should be disabled under the following conditions:
When the listener is specified as a talker.
When an unlisten (UNL) is received.
When IFC is received.

5.1.7

Multi-line interface messages

The multi-line interface messages are output from the controller when the ATN signal is set to Low.
The list of the multi-line interface messages are shown in “Table 5-1 Multi-line interface messages.“

RX4718W

5-6

5.1 Overview of GPIB

ColumnLow(1) MSG is an interface message.
(2) b1=DI01 ...... b7=DI07, DI08 are not used.
(3) It carries the secondary command.
(4) Backlash (＼) is used in IEC standard andyen mark (¥) is used in JIS standard.
GTL .... Go to Local
SDC ... Selected Device Clear
PPC ... Parallel Poll Configure
GET ... Group Execute Trigger

5-7

Secondary commandgroup (SCG)

TCT.... Take Control
LLO .... Local Lockout
DCL ... Device Clear
PPU ... Parallel Poll Unconfigure
SPE ... Serial Poll Enable
SPD ... Serial Poll Disable
UNL ... Unlisten
UNT ... Untalk

Table 5-1 Multi-line interface messages

RX4718W

The meanings are defined by PCG

Talkercommand
group
(TAG)

Primary command group (PCG)

Notes：The meanings are defined by PCG

Listenercommand
group
(LAG)

The talker addresses that are designated to each device

Universal
command
group
(UCG)

The talker addresses that are designated to each device

The listener addresses that are designated to each device

The listener addresses that are designated to each device

Addresscommand
group
(ACG)

5.2 RX4718W GPIB interface

5.2

RX4718W GPIB interface

For RX4718W GPIB interface, the parameters that can be set on the panel can also be set remotely.
Because SETTING / DATA and setting status can be transferred to outer devices, you can constructsophisticated auto instrumental system easily.
The instructions that set RX4718W are called program codes. Each program code consists of threealphabets and numeral letters that follows ISO 8-bit code characters specifications.
ASCII character strings are used to output measurement data such as timer to the controller.
ISO 8-bit code character string or binary data can be used for arbitrary wave data. Using binar
y data shorten the data transmission time.
Note that RX4718W GPIB interface and RS-232C can not be used simultaneously. In addition, thefollowing settings can not be used with the GPIB interface.
Power on/off
GPIB setting (addresses, delimiters)
RS-232C setting (Baud rate, stop bit length, parity)
Operation of MODIFY

5.2.1

Specifications■ Interface functions
Function
Source handshake
Acceptor handshake
TalkerSubsetSH1
AH1
T5

Listener

L4

Service request
Remote/local
Parallel poll
Device clear
Device trigger
Controller

SR1
RL1
PP0
DC1
DT0
C0

■ Bus driver function
DIO1-8
NDAC
NRFD
SRQ
DAV
EOI

RX4718W

Explanation
All send handshake functions are available.
All reception handshake functions are available.
Basic talker function, serial poll, talk-only
mode, talker disabler with MLA.
Basic listener function, listener disabler withMTA.
All service request functions are available.
All remote/local functions are available.
No parallel polling functions are available.
All device clear functions are available.
No device trigger functions are available.
No controller functions are available.

Open collector
3-state5-8

5.2 RX4718W GPIB interface■ Codes used
The program codes used for RX4718W setting are written in ISO 7-bit codes (ASCII). For thecomments on panel setting memory, ISO 8-bit codes can be used.
Alphabetic characters are case-independence. Both uppercase and lowercase characters are translated
and executed without any differences.

■ Address and delimiter“5.2.3 Setting of GPIB“

The address and delimiter (for talker) of RX4718W is set on the other function and the set values arebacked up with batteries while the power is turned off.
The range of address is a number between 1 and 30.
“CR” or “CR/LF” is selected and EOI signal is also sent with the delimiter at the same time.
The delimiter is one of “CR”, “LF” and “EOI”, or any combination of them for the listener.

■ Responses against interface messages
It initializes GPIB interface and releases the specified
IFC
listener and talker.

LLO

It clears the I/O buffer for GPIB and error status, stops
SRQ transmission, and resets SRQ factor. (The functionsof the main unit do not change.)
It disables the GPIB LOCAL key on the panel.

GTL

It changes the status to Local.

DCL and SDC■ Program codes
The program codes used for RX4718W setting are put in the input buffer at first. When a delimiter isreceived, the buffer is translated and executed at the sequence order.
The size of the input buffer is 1024 characters (1k bytes), and delimiters are not put into the input
buffer.
If the input buffer receives more than 1k bytes of program codes, it overflows. The input buffer iscleared, and the program code is not executed.
If the program code contains a header or parameters that do not match the rule, the following data
including the program code will be cleared and not be executed.
When the translation and execution finish, the input buffer is cleared and the next program code can be
put into the buffer.
The program code is divided into a header and a parameter. If the size of the program code is less than
the input buffer size, the next program code can be put into the buffer. Shown below is the syntax of the
program code to be transmitted.

RX4718W

5-9

5.2 RX4718W GPIB interface

HeaderParameter

Delimiters: Space codes: Semicolon

Figure 5-4 Syntax of program code
When you transmit multiple program codes continuously, you can place a space or a semicolon (;)
between program codes for legible purpose. Because spaces and semicolons are also put into the buffer,using less spaces and semicolons enables efficient use of the buffer.
RX4718W program codes can be categorized into setting messages that set parameters or behavior andquery messages that ask the status or setting.
The format of the basic setting message is shown below.


Setting message (turning the fault start phase function on and setting it as 123.4゜)
０ ；
ＦＰＨ
１２３．４
ＦＰＣ
a
b c d eabｃQuery message (query on the fault start phase)？ＦＰＨaa: Header. It is case-independence.
b: Space. Any number of spaces can be placed for legible purpose. If you do not need a space, you do
not have to put it.
c: Parameter. A parameter consists of polarity (+ or ) and a number. If the parameter size is bigger
than the specified size, it is not set. If the parameter has a polarity but does not have it, the parameteris treated as it has plus polarity.
d: Semicolon. Any number of semicolons can be placed for legible purpose. If you do not need asemicolon, you do not have to put it.
Query messages correspond to setting messages with some exceptions. A question mark (?) is placed
before the header of the setting message. A query message does not have a parameter. Only one query
message can be sent per transmission. Once RX4718W receives a query message, the next time it isdesignated as a talker, the response data will be sent. If multiple query messages are sent continuously,
only the last one is effective.
The program codes are listed in “Table 5-2 Program code list.“

RX4718W

5-10

5.2 RX4718W GPIB interface■ Response message
１２３．４
ＦＰＨ
a
b
c
a: Header. It consists of all uppercase characters. If the header is turned off (“HDR0”), it is not sent.
b: Space. If the header is turned off (“HDR0”), it is not sent.
c: Parameter. It is a value of floating-point parameter. Only minus (-) is specified for polarity.

■ Service request
A service request (SRQ) is a function that issues a interrupt to the controller when RX4718W is under
the following conditions, and it sets SRQ signal line of the bus line to Low.
SRQ factors are as follows.
An error occurs.
Amplifier output is over.
Timer measurement is finished.
Sweep is finished.
When the controller detects SRQ from RX4718W and serial poll is performed, RX4718W transmits thefollowing status byte to the controller and sets SRQ signal line back to High.
Status byte

1 when sweep finishes.
1 when timer measurement finishes.
Not used
1 when current output amplifier is over
1 when voltage output amplifier is over.
1 when an error occurs.
1 when SRQ occurs.
Not used.

Figure 5-5 Status Byte

RX4718W

5-11

5.2 RX4718W GPIB interface
Service requests are selectable. To disable a service request, mask it by setting the bit for it to one. The
header of the mask is [MSK] and decimal numbers should be used to set parameters.
1

If you want to use “Timer measurement finishes” and “Voltage output 1 amplifier is over”, set 2 and
4

0

2

3

5

2 to 0 and set the other bits to 1. So the value of the bytes is “MSK 45 (2 +2 +2 +2 = 45)”.
Service requests are released under the following conditions:
After the status byte is issued with serial poll
Device clear (SDC or DCL) is received.
Mask takes place with “MSK” of the appropriate factor.

■ Error codes“7.1Error message“

When an error occurs, issue query command “?ERR” and an error code is sent back.

5.2.2


Notes on handling GPIB

The number of devices that can be connected to GPIB in the system is 15 including a controller.
The cable length has the following limitations:・The total length of cables must be 2m multiplied by the number of devices or 20m,
whichever the shorter.
・The length of a cable must be 4m or less.



Before detaching GPIB connector, turn RX4718W off. If other devices are connected to the bus,
turn them off, too.

When you use GPIB, turn all devices connected to the GPIB bus on.

Attention should be paid to set GPIB addresses. If one talk address is assigned to multiple devices,
they may be damaged.



Attention should be paid to specify a delimiter. Inconsistent delimiter will cause a trouble.



If the header of the program code sent to RX4718W has an error, the whole program code string
will not be executed. If the parameter has an error, the program code will not be executed.



If you specify RX4718W as a talker without an output request (without issuing a query message),the GPIB bus may be locked.

Because the GPIB interface is assumed to be used in good conditions, avoid using it where thepower swing is wide or lots of noises are generated.

RX4718W

5-12

5.2 RX4718W GPIB interface

5.2.3

Setting of GPIB

RX4718W has GPIB and RX-232C interfaces, but they cannot be used simultaneously. So when you
use RX4718W, you must set GPIB or RS-232C interface.
Whether you use GPIB or not, parameters including addresses can be set on the other function. The
values you wet will be backed up with batteries while the power is turned off.
If you want to use GPIB, set GPIB to on. When GPIB is set to on, RS-232C is automatically disabled.
When GPIB is set to off, RS-232C is automatically enabled.
The address of GPIB is a number between 0 and 30. Usually address zero is assigned to the controller,
so you may use a number between 1 and 30. The default value is 2.
Delimiters are used when RX4718W transmits data. Choose “CR” or “CR/LF”. Any delimiters carry“EOI” with them.


Setting procedure
Press SHIFT+OTHER FUNC to display the other function on the【SETTING / DATA】.
Rotate MODIFY and select [GPIB].

SETTING/DATA

Move the cursor down with ▼ and turn MODIFY

GPIB

to select [on].

on
SETTING/DATA
SETTING/DATA

Move the cursor up with ▲ and press ►.

GPIB

Move the cursor with ▲ (up to address) and ▼ (down to delimiter)and set the address (0 to 30) and delimiter [CR] or [CR LF] with MODIFY.

RX4718W

5-13

2

CR LF
SETTING/DATA

5.2 RX4718W GPIB interface

5.2.4

Remote/local behavior

The remote/local status of GPIB shows whether peripheral devices are controlled by the controller ornot.
If RX4718W is set to the remote status by the controller, LED of the GPIB LOCAL is lit off andRX4718W cannot be controlled on the front panel.
To return RX4718W to the local status, press the GPIB LOCAL. When RX4718W returns to the local
status, GPIB LOCAL on the front panel is lit and RX4718W can be controlled on the front panel.
When you use the controller to set RX4718W to LLO (local lockout), GPIB LOCAL key is disabled,
meaning that the controller controls the remote/local status of RX4718W. To exit from the local lockout,
set uni-line message REN to High (False).
The behavior of remote/local is shown below.
Note that the talker does not have remote or local status.

［Local status］［Remote status］

Power on
Address is specified with REN=Low (True)
GTL command

Local（Not LLO）

REN=High (False)

Remote（Not LLO）

[LOCAL] key

LLO command

LLO command

Address is specified with REN=Low (True)

Local (LLO)

GTL command

Remote (LLO)[Local lockout (LLO) status]
Panel cannot be used to control RX4717W

Panel can be used to control RX4717W

Figure 5-6 Remote/local behavior

RX4718W

5-14

5.2 RX4718W GPIB interface

5.2.5

Setting program codesA) Setting the basic data on amplitude and phase
RX4718W has two types of amplitudes and phases. They are normal/fault and voltage output 1-3. You
should specify the status and phase before setting amplitudes and phases.
For example, you should set below values to set the following status:
NormalFault
Voltage
Voltage
Voltage
Voltage
output 1
output 3
output 1
output 3
Amplitude
63.5V
10V
32.8V
20V
Phase
0.0 ﾟ
90.0 ﾟ
30.0 ﾟ
120.0 ﾟ
Transmission of program code
CES0 CEP0 RNG1 AMP63.5 PHS0 CEP1 RNG0 AMP1 PHS90 CES1 CEP0 AMP32.8 PHS30
①
②
③
④
⑤
⑥
⑦
⑧
⑨
⑩
⑪
⑫
⑬
OUC1 CEP1 AMP2 PHS120 OUC1 “CR/LF”
⑭
⑮
⑯
⑰
⑱
⑲

Firstly, send CES0 (①) to transmit normal setting value, declaring the following data is normal setting
values. Data from ② to ⑨ is treated as normal setting values.
Send CEP0 (②) to declare that the following data represents voltage output 1. Data items from ③ to
⑤ are interpreted as the setting value for voltage output 1.
RNG1:

The voltage output 1 range is set to 125V. (Irrespective of normal or fault.)

AMP63.5:

The normal voltage 1 amplitude is set to 63.5V.

PHS0

:

The normal voltage 1 phase is set to 0゜.

Send CEP2 (⑥) to declare the following data represents voltage output 3. Data items from ⑦ to ⑨
are interpreted as the setting value for the voltage output 3.
RNG0:

The voltage output 3 range is set to 40V. (Irrespective of normal or fault)

AMP1

:

The normal voltage 3 amplitude is set to 10V.

PHS90

:

The normal voltage 3 phase is set to 90゜.

Next send CES1 (⑩) to declare the following data represents the error values. Data items from ⑪ to
⑱ are interpreted as the error values. Error values are set respectively.
When ③ and ⑦ are used to set the range, the output is turned off automatically. Therefore, use ⑭
to turn the voltage output 1 on and ⑱ to turn the voltage output 3 on.
“CR/LF” (⑲) means the end of the data transmission. The actual setting of RX4718W starts at thispoint.

RX4718W

5-15

5.2 RX4718W GPIB interface

B) Response to query message
The following is the example of query message about the operational point when the operation mode isnormal sweep [SWEEP].
HDR1 CES2 CEP0 ?AMP “CR/LF”(program code transmission 1)
The header is on, the status specification is sweep output, the phase specification is voltage andthe query is on the amplitude.



AMP 50.63 ”CR/LF”(response message reception 1)
The voltage amplitude of sweep output is 50.63V.



HDR0 ?PHS “CR/LF”(program code transmission 2)
The header is off and the query is on the phase.



-150.2 “CR/LF”(response message reception 2)
The voltage phase of sweep output is -150.2 ﾟ.

RX4718W

5-16

5.3 Program code list

5.3

Program code list
Table 5-2 Program code list

Function

HeaderMaster/slave

GRP

Operation modeMOD

Operation command

OST

PSW mode

PSW

Frequency mode

FMD

Frequency (internal)

FRQ

Function and range
0: Separate
1: Master
2: Slave
0: Manual
1: HLD mode
2: NHD mode
3: Sweep
4: 1LG SWEEP
5: 2LS SWEEP
6: Operation･recovery time
7: 95 test
8: Search sweep
9: DSK search sweep
11: SOR quick change
13: 1LG search sweep
14: 2LS search sweep
15: 1LGDSK search sweep
16: 2LSDSK search sweep
0: Normal
1: Fault
2: Fault direction sweep
3: Normal direction sweep
4: Sweep stop
0: Alternate
1: Momentary
0: Internal
1: 50Hz fixed
2: 60Hz fixed
3: Line
4: External signal synchronization
10.000-200.000Hz

Query

Phase
specificat
ion

Statusspecificat
ion

ExampleAvailable

Not
neededNotneededGRP1

Available

Not
neededNotneeded

MOD1

Available

Not
neededNotneededOST2

Available

Not
neededNotneededPSW1

Available

Not
neededNotneededFMD1

Available

Not
neededNotneeded

FRQ50.5

Available

Not
neededNotneededFNC0

0: Sine1: Harmonic 1
2: Arbitrary
Waveform selection

RX4718W

FNC

6: +DC
7: -DCWhen internal DIP SW does notallow selecting DC waveform, +DC
and –DC setting will be disabled.

5-17

5.3 Program code list

Function

HeaderFunction and range
0: voltage out 1
1: voltage out 2
2: voltage out 3This command is used to assign
setting values to each electric
voltage out when electric voltage
and phases are set. This command isalso used to ask SETTING / DATA.
0: Normal (SOR step 1)
1: Fault (SOR step 4)
2: Sweep output
12: SOR step 2
13: SOR step 3This command is used to assign
setting values to each status whenelectric voltage and phases are set.
This command is also used to ask
SETTING / DATA.

Query

Phase
specificat
ion

Statusspecificat
ion

ExampleAvailable＊＊

NeededCEP0

Available

Needed＊＊CES1

Code setting phase
specification

CEP

Code setting statusspecification

CES

Function

HeaderFunction and range

Query

Phase
specificat
ion

Statusspecificat
ion

ExampleAmplitude

AMP

Voltage (except for +DC and -DC)
40V, 0.000 - 40.000V
125V, 0.00 - 125.00V
250V, 0.00 - 250.00V
Voltage(except for +DC and -DC)
40V, 0.00 - 40.00V
125V, 0.0 - 125.0V
250V, 0.0 - 250.0V

Available

NeededNeeded

AMP
12.34

Phase
Phase setting range
switchPHS

Available

NeededNotneededNeededNotneededAvailable

NeededNotneededISC0

Available

NeededNotneeded

EMA20

Amplifier input
selection
External output
amplitude range

RX4718W

PLS-359.9 - 359.9 ﾟ
0: Minus On
1: Minus Off
0: Internal

Available

ISC

EMA

2: External output
Voltage: 0.00-999.99V
When a device such as a booster
is used externally, the setting value
is used as a full-scale value.

5-18

PHS120PLS0

5.3 Program code list

Function

HeaderBalanced 3-phase

PBL

1LG grounding
phase specification

LGP

1LG fault zerovoltage

LGV

1LG calculation

LGE

2LS short-circuit
phase specification

LSP

2LS fault line
voltage

LSV

2LS calculation

LSE

Line to line voltage
calculation

LVL

Phase change

PSH

RX4718W

Function and range
Setting of the output and status
being a standard.
0: Normal V1
1: Normal V2
2: Normal V3
3: Fault V1
4: Fault V2
5: Fault V3
0:V1
1:V2
2:V3
0.000～999.99V
The upper value is limited with therange and factor.
No parameters
The calculation is executed with
1LG parameters that are set at thereception of this command.
0:V1-V2
1:V2-V3
2:V3-V1
0.000～1732.0V
The upper value is limited with therange and factor.
Query only
0: Normal V1-V2
1: Normal V2-V3
2: Normal V3-V1
3: Fault V1-V2
4: Fault V2-V3
5: Fault V3-V1
6: Normal Vo
7: Fault Vo
0:V1>V2>V3 direction
1:V1<V2<V3 direction
Phases are changed with thedirection set with the parameter.

5-19

Query

Phase
specificat
ion

Statusspecificat
ion

ExampleNotavailable

Not
neededNotneededPBL2

Available

Not
neededNotneededLGP1

Available

Not
neededNotneeded

LGV12.3

Notavailable

Not
neededNotneededLGE

Available

Not
neededNotneededLSP2

Available

Not
neededNotneededLSV23.4

Notavailable

Not
neededNotneededLSE

Available

Not
neededNotneeded

LVL4

Notavailable

Not
neededNotneeded

PSH1

5.3 Program code list

Function
Output range
Output phase
ON/OFF
Output at once
ON/OFF

HeaderRNG
OUC
OTC

Function and range
0: 40V
1:125V
2:250V
0:OFF
1:ON
0:OFF
1:ON
0: Side terminal 1 phase
1: Side terminal 3 phases
2: front terminal

Query

Phase
specificat
ion

Statusspecificat
ion

ExampleAvailable

NeededNeededRNG1

Available

NeededAvailable

Not
neededNotneededNotneededAvailable

Not
neededNotneeded

SCM2

OUC1
OTC1

Output selector
mode

SCM

Output selector 1
phase
Groundfault/short-circuit

SCG

0: Ground fault
1: Short circuit

Available

Not
neededNotneededSCG1SCP0: R(ground fault),
R-S(short circuit)
1: S(ground fault),
S-T(short circuit)
2: T(ground fault),
T-R(short circuit)

Available

Not
neededNotneeded

SCP0

SRL

0:1L
1:2L

Available

Not
neededNotneeded

SRL1

SCR

0:R
1:S
2:T

Available

Not
neededNotneeded

SCP0

GSC

0:OFF
1:ON

Available

Not
neededNotneeded

GSC0

Output selector 1
phase
Phase selection
Output selector 3
phase
Output selection
Output selector 3
phase
Phase rotation phaseselection
Selector
communication
function

RX4718W

5-20

5.3 Program code list

Function

HeaderOperation start input
logic

STL

Operation start input
statusSTR

Operation start stop
setting

SPS

Trip input logic

TRL

Trip input status

TRP

Chattering time

CHT

0.001 - 0.100s

Available

Chattering time
control

CHC

0:OFF
1:ON

Available

Fault duration

FLT

0.001 - 65.000s

Available

Fault duration
control

FLC

0:OFF
1:ON

Available

Pre-trigger time

PTT

0.010 - 6.000s

Available

Pre-trigger time
control

PTC

0:OFF
1:ON

Available

Fault start phaseFPH

0.0 - 359.9 ﾟ

Available

Fault start phase
control

FPC

0:OFF
1:ON

Available

RX4718W

Function and range

Query0:↑a RISE
1:↓b FALL
Query only
0: Recovery
1: Operation
0: unused
1: used0:↑a RISE
1:↓b FALL
Query only
0: Recovery
1: Operation

Available
Available
Available
Available
Available

5-21

Phase
specificat
ion
Not
neededStatusspecificat
ion
Not
neededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededExample
STL0
?STR
SPS0
TRL0
?TRP
CHT0.05
CHC1
FLT1.23
FLC0
PTT0.123
PTC1
FPH90
FPC0

5.3 Program code list

HeaderFunction and range

Query

Phase
specificat
ion

Statusspecificat
ion

ExampleTimer mode

CNT

0: Interval
1: One-shot
2: Train
3: Start measurement

Available

Not
neededNotneededCNT0Timer clear

CCL

No parameters

Notavailable

Not
neededNotneededNotneededNotneededNotneededNotneededAvailable

Not
neededNotneeded?CMV

Available

Not
neededNotneeded?RTD

NotneededNotneededFTW0.5Phase
specificat
ion
Not
neededStatusspecificat
ion
Not
neededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededPhase
specificat
ion
Not
neededNotneededNotneededStatusspecificat
ion
Not
neededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededNotneededFunction

Timer setting timer
clear
Timer setting
automatic recovery

CRS
ART

0: Automatic
1: Manual
0:OFF
1:ON
Used for query of the operation timemeasurement value.
Data range 0.0001 - 999.99s
Use for query of the recovery timemeasurement value
Data range 0.0001 - 999.99s

Available
Available

Operation timemeasurement value

CMV

Recovery timemeasurement value

RTD

Fault waiting time

FTW

0.00 - 9.99s

Available

Function

HeaderOperation and range

Query

Sweep timeSTM

1.0-1000.0s

Available

Seep position

MSP

Manual sweep

MSC

Search･DSK sweep
times
Search ･DSK
sweep judge time
DSK sweep trip
wait time
Search･DSK sweep
output cut

Function
95 test
Crossover frequency
95 testSweep speed
95 testHold time
95 test
Amplitude quickchange control
95 testOperation frequency
95 testOperation time
95 testRecovery frequency
95 testRecovery time

RX4718W

SWT

0.00 - sweep time sThis command is issued to move toan arbitrary sweep position.
0:OFF
1:ON
Set sweep times
2 - 10Available
Available
Available

JTM

0.1 - 10.0s

Available

TTM

0.1 - 10.0s

Available

SOC

0: Unused
1: UsedAvailable

HeaderFunction and range

Query

FCF

10.000 - 200.000Hz

Available

FSS

0.001 - 9.999Hz/s

Available

FRW

0.01 - 9.99s

Available

FAQ

0:OFF
1:ON

Available

FAF
FAT
FRF
FRT

Query only
10.000 - 200.000Hz
Query only
0.0001 - 999.99s
Query only
10.000 - 200.000Hz
Query only
0.0001 - 999.99s

Available
Available
Available
Available

5-22

CCL
CRS1
ART0

ExampleSTM123
MSP
12.34
MSC1
SWT3
JTM5.0
TTM3.0
SOC1

ExampleFCF48.5
FSS1.23
FRW3.45
FAQ0
?FAF
?FAT
?FRF
?FRT

5.3 Program code list

Function

Measurement status
read

RX4718W

HeaderOperation and range

Query

Phase
specificat
ion

Statusspecificat
ion

ExampleMST

Query onlyThis is a status to show thatthe measurement ends correctly.
When it ends correctly, 0 isshown. When no measurement
value is obtained, the following
values are used.
Normal sweep
1
1LG sweep22LS sweep
4
95 test8
Search sweep
16
DSK search sweep
32
HLD mode64
NHD mode128
Simultaneous operation･recovery measurement256
SOR mode512
1LG search sweep
1024
2LG search sweep
2048
1LGDSK search sweep
4096
2LSDSK search sweep
8192

Available

Not
neededNotneeded?MST

5-23

5.3 Program code list

Function

Harmonic wave 1
amplitude

Harmonic wave 1
phase

Header

HAM

HPH

Operation and range

Query

First parameter
Harmonic wave degree: 1 to 25
Second parameter
Harmonic wave amplitude: 0.0 to
100.0%In this example, the third
amplitude is set to 8.5%.
Specify the degree of the harmonic
wave to ask the values. In thisexample, the third harmonic wave
amplitude is asked.
First parameter
Harmonic wave degree: 1 to 25
Second parameter
Harmonic wave phase: 0 to 359 ﾟ
In this example, the third phase is
set to 120 degrees.

Phase
specificat
ion

Statusspecificat
ion

HAM
3,8.5
Available

NeededNeeded

?HAM3

HPH
3,120
Available

NeededNeededSpecify the degree of the harmonic
wave to ask the values. In thisexample, the third harmonic wave
phase is asked.
Harmonic wave 1
calculation

RX4718W

HCL

No parameters
When the waveform obtained fromthe calculation exceeds the peak ofsine wave in the full-scale range,
an error will be displayed.

5-24

Example?HPH3

Notavailable

NeededNeededHCL

5.3 Program code list

HeaderOperation and range

Query

Phase
specificat
ion

Statusspecificat
ion

ExampleArbitrary waveform
data format

FMT

0: ASCII format (ASCII)
1: Binary format (BINARY)
When RS-232C is used, only
ASCII data is accepted. If binary
format is specified, an error will
occur.

Available

NeededNeededFMT1

Arbitrary waveform
starting address

STT

0 to 4095

Available

NeededNeeded

STT1000

WDN

1 to 4096
Because the data buffer cancontain up to 1024 bytes of data,delimiters should be used toprevent buffer overflow.

Available

NeededNeededWDN512SET

No parameters

Available

Not
neededNotneededSET

BLK

1 to 4096

Available

NeededNeeded

BLK512OUT

No parameters

Notavailable

NeededNeededOUT

Function

HeaderOperation and range

Query

Beep setting

BEP

0: OFF
1: ON

Available

Expanded external
response input

SRI

0 to 255

Available

Phase
specificat
ion
Not
neededNotneededStatusspecificat
ion
Not
neededNotneededAvailable

Not
neededNotneeded

STO0,
Reset

Not
available

Not
neededNotneeded

RCL10

Phase
specificat
ion
Not
neededStatusspecificat
ion
Not
neededFunction

Number of arbitrary
waveformtransmission data
items
Start writing ofarbitrary waveform
data
Read block lengthof arbitrary
waveform data
Start reading ofarbitrary waveform
dataFirst parameter
Memory number: 0 to 31
Second parameter
Comment
Comment is asked.
In this example, current setting
value and comment “reset” areput in memory 0.
0 to 33
When an attempt is made to readan unrecorded memory number, anerror occurs.

Writing of panelsetting memory

STO

Reading of panelsetting memory

RCL

Function

HeaderOperation and range

Query

Header ON/OFF

HDR

0: OFF
1: ON

Available

RX4718W

5-25

Example
BEP0
SRI3

Example5.3 Program code list

SRQ mask

MSK

Status byte

STS

Error code

ERR

Machine type

IDT

Version

VER

RX4718W

0 to 63
This mask is used to select SRQ
signaling factors. Selectappropriate factors out of thefollowing list and add up thecorresponding numbers. The
resulting number will make amask. After the number is set,
SRQ will be prohibited. To release
all the prohibitions, zero should be
set. When MSK60 is set, SRQ will
occur at the completion of timer
measurement or stopping of
sweep.
32
Error occurrence
V output overload
16
occurrence
I output overload
8
occurrence
4
UnusedCompletion of timer
2
measurement
1
Stop of sweep
Query only.
This query command is issued tocheck the status shown below. The
numbers corresponding to eachoccurrence factor are added up andreturned.
64
SRQ occurrence
32
Error occurrence
V output overload
16
occurrence
I output overload
8
occurrence
4
UnusedCompletion of timer
2
measurement
1
Stop of sweep
Query onlyThis command is issued to ask
error status. An error number isreturned.
“7.1Error message“Query onlyThis command is issued to ask
machine type. [IDT 4718] isreturned.
Query onlyThis command is issued to ask thesoftware version of RX4718W. A
character string like [VER 3.00] isreturned.

5-26

Available

Not
neededNotneeded

MSK60

Available

Not
neededNotneeded?STS

Available

Not
neededNotneeded?ERR

Available

Not
neededNotneeded?IDT

Available

Not
neededNotneeded?VER

6. RS-232C interface

6.1
6.1.1
6.2
6.2.1
6.2.2
6.2.3
6.2.4
6.2.5

RX4718W

Overview of RS-232C ········································ 6-2
Specifications of RS-232C ·································· 6-3
RX-232C interface of RX4718W ·························· 6-5
Specifications ·················································· 6-5
Connector and signal line ··································· 6-6
Connecting connector lines ································· 6-8
Setting of RS-232C ··········································· 6-9
Setting of program codes ································· 6-10

6-1

6.1 Overview of RS-232C

6.1

Overview of RS-232C

RS-232C is an interface standard that is used between data communications equipment andcomputers or data terminal equipment. This interface is established JIS X 5101“INTERFACEBETWEEN DATA CIRCUIT-TERMINATING EQUIPMENT (DCE) AND DATATERMINAL EQUIPMENT (DTE)” and American EIA.
Serial data transmission is used and developed in communications area. If data should betransmitted from a distance, signals are modulated and sent, then they are demodulated andreceived by a modem. This is the most popular method for long distance communications.
RS-232C is a interface standard of modems. Data terminal equipment and modems have theappropriate specifications. The connection between the two is shown in “Figure 6-1 RS-232C
connection.“
The RS-232C interface is used to connect personal computers. As the interface develops,
RS-232C is gradually employed for instrumentation connection. When connecting a computerwith an instrument through RS-232C interface, you can connect them without a modem
because the distance between the two is short. In this case, the RS-232C interface is not used
for original purpose, each side has two roles, a computer and data terminal equipment, causing
an interface trouble. To avoid this trouble, the one side is used as a modem or a cross cablethat connects input of one side to output of the other side and output of one side to input of theother side is used. An example of a cross cable connection is shown in “Figure 6-2 Connection
without modem.“Compare to GPIB, RS-232C is used irregularly, so you should check the specifications of thedevices to be connected carefully, use appropriate cables, and make appropriate programs thatmatch the system.
Computer or other devices

Modem

Modem

Carrier
control

Carrier
control

Modulation

Modulation

DemodulationDemodulationData terminal equipment orother devices

Figure 6-1 RS-232C connection

RX4718W

6-2

6.1 Overview of RS-232C

Computers or other devices

Data terminal equipment orother devices

Cross cable

Abbreviations
CD ：Carrier

Detect

RTS：Request

To

Data

CTS：Clear

To

Send

RxD：Received

DSR：Data

Set

Ready

TxD：Transmitted

DTR：Data

Terminal

Send

Data

Ready

Figure 6-2 Connection without modem

6.1.1

Specifications of RS-232C■ Mutual connection equivalent circuit
VO :Open circuit voltage

RO :Internal direct current resistance in circuit

CO :Total practical capacity meaured at connection
point including cable

V:

Voltage at mutual pointC L:

Practical load capacity measured at connection
point

R L:

Terminal direct current resistance

EL:

Open circuit voltage of load

Figure 6-3 Mutual connection equivalent circuit

RX4718W

6-3

6.1 Overview of RS-232C■ Receiver
Input impedance (RL):

3kΩ-7kΩ (at the applied voltage of 3 to 25V)

Practical local capacity (CL):

2500pF or less

Signal identification voltage “1” :“0” :Open circuit voltage (EL):

-3V or less
+3V or more
2V or less

■ DriverMaximum open circuit voltage (Vo):±25V or lessMaximum current at short-circuit:±0.5A or less

Logic output level “1”:-15 to -5V“0”:+15 to +5V

Output impedance (Ro):300Ω or less■ Connector
The connector on the data terminal equipment is shown in “Figure 6-4 Connector on connection cable.“RX4718W

6-4

6.2 RX-232C interface of RX4718W

6.2

RX-232C interface of RX4718W

The RS-232C interface of RX4718W has almost the same functions as GPIB of RX4718W. Parametersetting, parameter transmission, and data transmission can be performed.
The RX-232C interface can not be used with GPIB simultaneously. The following settings are notavailable for RS-232C.
Power ON/OFF
Setting of GPIB (addresses and delimiters)
Setting of RS-232C (baud rate, stop bit length, parity)
Operation of MODIFY
Comparing to GPIB, RS-232C has the following disadvantages. GPIB will enable quicker and moresophisticated control.


Because RX4718W and a computer are connected one to one, one computer cannot control multiple
devices. When you want to use multiple RX4718W to construct multiple phase protection relay
testers with master/slave connection and to control them by a computer, you should use GPIB.



Because data is transmitted through serial line, the transmission speed is slower than GPIB thatuses 8-bit parallel line.

Because interrupts corresponding to SRQ of GPIB cannot be used, efficient program cannot be
made.

6.2.1

Specifications

RX4718W RS-232C uses the specifications of the data terminal equipment that are based upon “JIS C
6361 LOW-SPEED ASYNCHRONOUS MODEM INTERFACE.”
Communication mode:

Asynchronous

Baud rate:

300, 600, 1.2k, 2.4k, 4.8k, or 9.6k

Data bit length:

8 bitsStop bit length:

1 bit or 2 bit

Parity:EVEN, ODD or NONE

Output signal:±12V, equivalent for driver SN75188N

Input signal:

Maximum of ±30V, equivalent for receiver SN75189AN

Input and output operations cannot be conducted simultaneously.

RX4718W

6-5

6.2 RX-232C interface of RX4718W

6.2.2

Connector and signal line

The pin numbers of the connector are shown in “Figure 6-5 Connector of data circuit-terminating
equipment.“
Connector fixing screws are M2.6.

39.09 (Maximum)(unit: mm)

38.84 (Minimum)

8.48 (Maximum)
8.23 (Minimum)
4-R
Shell

Pin (male)

2.69 (Maximum)
2.59 (Minimum)

5.99 (Minimum
5.69 (Minimum)

Figure 6-4 Connector on connection cable47.17 (Maximum)(unit: mm)

46.91 (Minimum)
8.03 (Maximum)
7.77 (Minimum)
4-R
Pin (female)

2.62 (Maximum)
2.46 (Minimum)

Shell
6.30 (Maximum)
6.05 (Minimum)()

38.51 (Maximum)
38.25 (Minimum)

Figure 6-5 Connector of data circuit-terminating equipment

RX4718W

6-6

6.2 RX-232C interface of RX4718W

Table 6-1 Types and their explanation of RS-232C
Pin number
1
2
3

Name
Frame Ground
Transmitted Data
Received Data

Abbreviation
FG
TxD
RxD

4

Request to Send

RTS

5

Clear To Send

CTS

6

Data Set Ready

DSR

7Signal GroundSG

20

Data Terminal Ready

DTR

RX4718W

Explanation
Data output signal line from RX4718W.
Data input signal line to RX4718W.
“H” when data output from RX4718W starts.
“L” when data output ends.
“H” to enable data output from RX4718W.
Originally modem returns “H” to CTS in
response to RTS. When response from thereceiving side is not necessary, connect CTS to
RTS directly. This pin can be used as BUSY forreceiving side.
“H” to enable data output from RX4718W.
When DSR is set to “L” and RX4718W is put
into output status, it becomes “Er6.” If thissignal input is not necessary connect DSR to
DTR directly.
“H” when RX4718W is in RS-232C mode.
“L” when RX4718W is in GPIB mode.

6-7

Direction
OutputInput
Output

Input

Input

Output6.2 RX-232C interface of RX4718W

6.2.3

Connecting connector lines

Because no standard cables are produced unlike GPIB, lines should be connected to match thespecifications of the equipment to be used through RS-232C interface without a modem.
An example of line connection between RX4718W (data terminal equipment) and the other data
terminal equipment is shown below. Study the specifications of equipment to be connected before
actual connection.
■ Minimum connection
Frame ground 1 is not separated from signal ground 7 in this equipment.
RX4718W

Pin NoPin NoFrame grand1

1

Frame ground

Transmitted data

2

2

Transmitted data

Received data

3

3

Received data

RTS

4

4

RTS

CTS

5

5

CTS

6

DSR

Note

Host computer

DSR

6Signal ground7

7

Signal ground

DTR

20

20

DTR

Note: Actual line connection should be done with careful study of the specifications of the equipment or programs.

■ When checking mutual connection
Frame ground 1 is not separated from signal ground 7 in this equipment.
RX4718W

Pin NoPin NoFrame ground

1

1

Frame ground

Transmitted data

2

2

Transmitted data

Received data

3

3

Received data

RTS

4

4

RTS

CTS

5

5

CTS

DSR

6

6

DSR

Signal ground7

7

Signal ground

Unused

8

8

CD

DTR

20

20

DTR

RX4718W

6-8

Host computer6.2 RX-232C interface of RX4718W

6.2.4

Setting of RS-232C

RX4718W contains two interfaces, GPIB and RS-232C. Since they can not be used simultaneously, oneof them needs to be set.
Use of RS-232C, setting of baud rate and each parameter are done by the other function and the set
values are backed up with batteries if the power is turned off.
To use RS-232C, turn the RS-232C on. When RS-232C is turned on, GPIB will be automatically turned
off. On the contrary, when RS-232C is turned off, GPIB will be automatically turned on.
The setting parameters of RS-232C are as follows.



Use of RS-232C:

ON/OFF

Baud rate:

300, 600, 1.2k, 2.4k, 4.8k, or 9.6k

Stop bit length:

1 bit or 2 bit

Parity:EVEN, ODD, or NONE

Setting procedure
Press SHIFT+OTHER FUNC to display the other function on the 【SETTING / DATA】.
Rotate MODIFY and select [RS-232C].
Move the cursor with ▼ and turn MODIFY
to select [on].

SETTING/DATA

RS-232Con
SETTING/DATA

Move the cursor up with ▲ and press ►.

SETTING/DATA

Rotate MODIFY and the following parameters are selected.
Baud rate[BAUD RATE]
Stop bit length[STOP BIT]
Parity[PARITY]
Move the cursor down with ▼ to select each parameter with MODIFY.

RX4718W

6-9

Baud rate
9600bps
SETTING/DATA

6.2 RX-232C interface of RX4718W

6.2.5

Setting of program codes

The program codes of RX4718W RS-232C interface are the same as those of GPIB.
Because RS-232C does not have handshake function unlike GPIB, you should append a query
message to a program code to control RX4718W. You should advance to the next step after receiving a
response from RX4718W. This secures the reliable operation. Changing of the range and turning on or
off are time-consuming transactions, but they should be checked carefully in every step.

■ Setting example
Controller
The controller sends “?IDT”
to check RX4717W behavior
and waits for machine typeRX4717W (header on)?IDT

Because the controller
receives the machine namedata, it decides that RX4717W
is in the working MODE. It
sends a program code tochange the MODE to the HLD
MODE with a query command
to check the setting.

IDT 4717

MOD1 ?MOD

Because the controller
receives the response
message that indicates the
MODE is changed to the HLD
MODE, it decides that thesetting is done normally andadvances to the next step.

RX4718W

Because RX4717W receives
a query command that asks
the machine name, it sends
machine name data.

MOD 1

6-10

Because RX4717W receives
a command that changes the
MODE to the HLD MODE, itchanges the modes. Because
RX4717W receives a querycommand that asks the
MODE status, it sends a
response message thatindicates the MODE ischanged to the HLD MODE.

7. Troubleshooting

7.1
7.2

RX4718W

Error message ················································· 7-2
Handling apparent faults ···································· 7-4

7-1

7.1 Error message

7.1

Error message

If abnormality is detected at the self test when the power is turned on, the error message is shown on thelower fluorescent display.
The following table shows the error messages. Please contact us or our sales agency if the error
message occurs.
Table 7-1 List of error messages when the power is turned on
No
1
2
3

Message
ROM CHECKERRORRAM CHECKERRORCHECK SUM
ERROR

Error content
An error occurred in the ROM used in the RX4718W. RX4718W fault.
An error occurred in the RAM used in the RX4718W. RX4718W fault.
The batteries used for memory backup was discharged and the data could not be retained.

SETTING/DATA

When an error occurred in the normal operation, the error number

ERR 10and error message are displayed on the 【SETTING / DATA】

OVER RANGESETTING/DATA

and a long beep sounds if the beep setting is on.

The display of the error number and error message will disappear with the press of keys other than
NORMAL (operation by the press of key is not effective at this time) and the normal operation will be
returned.
The following table shows the error contents.
Table 7-2 List of error messages in normal operation
No.
10
11
12
13

Message
OVER RANGEV1AMP OVERV2AMP OVERV3AMP OVER

14NO DATA

15
16

INPUT ERRTIMER OVER

20

SWEEP ERR21

RANGE ERR

23

HARM ERR

24

PARAMET ERR

25

NOW EXT OUT

27

NOW F SWEEPIN

The set value entered by the numeral buttons was outside the range.
3 sec or more have elapsed after the voltage amplifier 1 was overloaded.
3 sec or more have elapsed after the voltage amplifier 2 was overloaded.
3 sec or more have elapsed after the voltage amplifier 3 was overloaded.
The panel setting memory with no data stored in was tried to read. Or the panelsetting memory content disappeared because the battery which backs up thememory was over discharged.
Data was entered in unspecified format from the numeral buttons.
The timer value exceeded its maximum value (9999.9 sec.).
The set value of each amplitude phase during a sweep of 1LG or 2LS is not
appropriate as the set value of 1LG or 2LS.
Ranges are not the same when three phases are set at once.
The sum total of amplitude percentages of harmonic 1 is too large to fit
in waveform memory.
An error occurred in calculation of 1LG and 2LS.
The range was set or ON/OFF setting was selected when the amplifier
input selection is “external output”.
In 95 test mode, frequency mode was set in other than “Internal”.

No.

Message

Error content

30

HEADER ERR

31

SYNTAX ERR

RX4718W

Error content

A header not found in the specification was set when a program code was set by
GPIB/RS-232C.
The parameters set by the GPIB/RS-232C do not conform to the specified

7-2

7.1 Error message

35

FRQMODE ERR

36

NOW SWEEPINX

37

CHARACT OVER

38

INTERVALFIX

40
41
42

PARITY ERROVER RUNFRAMING ERR

43

BUFFER OVER

44

FORMAT ERR

RX4718W

format.
A frequency was set while no frequency mode was internally set by the
GPIB/RS-232C.
A command other than “?STS” and “OST” was sent by the GPIB/RS-232C
during a sweep.
10 or more characters were set in a comment in the panel setting memory
by the GPIB/RS-232C.
An item other than interval was set by a GPIB/RS-232C command in simu
ltaneous operation/recovery measurement mode.
A parity error occurred in RS-232C transfer data.
An overrun error occurred in RS-232C transfer data.
The RS-232C transfer data stop bit mismatched.
Data of 1025 or more characters was transferred at a time when a progra
m code was set using the GPIB/RS-232C.
A format error occurred when a program code was set using the GPIB/RS232C.

7-3

7.2 Handling apparent faults

7.2

Handling apparent faults

When using the RX4718W, if an apparent fault phenomenon occurs although there is no error indication,
make sure that there is no error in the operation, usage and connections with reference to the following.
If none of them is applicable, it may be a fault. Leaving the problem unattended may lead to asecondary fault and is dangerous. Prevent the power from being turned ON and contact NF
CORPORATION or our sales agent.

■ The voltage amplitude set value does not match the output value.


A waveform other than a sine wave is set in the waveform selection.
Set the sine wave in the waveform selection.
“3.4.3 Waveform selection“The load connection is not correct.
The voltage amplifier selects the output according to the setting of the output selector. Make sure
to connect the load connection correctly.
“3.3.4 Output “■ A trip signal operates incorrectly, preventing measurement of the operation time.
The trip signal voltage is not appropriate.
When the trip signal is a voltage signal, the threshold voltage of RX4718W is selected from +50V,+8V and +2.5V. Select a value with a sufficient margin with respect to the trip signal voltage ofthe protective relay measured.
“3.1.1 Left side panel“
Due to a high leakage current of a trip signal, the non-operation voltage of some protective relay
when connected to the RX4718W, exceeds +50V.
In such a case, connect a resistor with a few k in parallel to the trip signal input terminal so thatthe non-operation voltage may be low enough compared to 50V.



The trip signal contains chattering.
When the timer mode is ONE-SHOT, the width of chattering will be measured if the trip signal
contains chattering.
Use the trip input chattering correct function to remove the chattering.
“3.5.1.B) Setting of trip input chattering correction function“

RX4718W

7-4

7.2 Handling apparent faults■ It does not quickly change to fault/ sweep does not operate.


The trip input logic setting is not correct.
In standard setting, the trip input operates when the voltage is applied (or the contact isshort-circuited) and returns when the voltage is removed (or the contact is opened). However,some protective relays have the opposite logic and the trip input logic setting can reverse thesignal input logic.
If this setting is not correct, quick change to fault does not occur in the quick change mode andsweeping does not occur in the sweep mode.
Set the trip input logic setting correctly.
“3.5.1.A) Setting of [TRIP INPUT] logic“

The operation start input logic setting is not correct.
When the operation start command is given by the operation start input, the operation does notstart if the input logic setting is not correct.
Set the operation start input logic setting correctly.
“3.5.1.C) Setting of operation start input logic“■ The timer does not operate even if a quick change is made by an external signal.
The external signal is not connected to the operation start input.
The quick change command input and quick change control signal input of RX4718W are to
make the RX4718W in the normal/fault status directly and the timer does not operate.
The operation start input of the RX4718W is an operation start command for each operation
mode. To operate the timer, make the quick change with the operation start input.
“4.4.2 Synchronization of quick change operation“The operation start input signal contains chattering.
When the quick change is occurred by the operation start input, set the stop setting to [off] if thesignal contains chattering.
When the stop setting is [on], it may returns to normal immediately or fault may occurs again if
the input signal contains chattering and the timer does not operate properly.
“3.5.1.D) Stop Function of operation start input “■ A quick-change operation causes the hang-up or the RX4718W not to operate.
The power supply capacity is not sufficient.
Using a table tap or cable reel causes high impedance of the power supply line. When theRX4718W is quickly changed and the electric power consumption is increased rapidly, this
impedance reduces the power supply voltage, which may prevent normal operation of thisequipment.
Supply the power to the RX4718W by directly plugging the power cable to the receptacle.

RX4718W

7-5

7.2 Handling apparent faults■ Key operation does not work.
Key lock or cursor off setting is selected.
This problem occurs when LED of KEY LOCK or CURSOR ON/OFF is turned on.
In case of KEY LOCK, pressing SHIFT+LOCK OFF turns LED off and the key lock is canceled.
In case of CURSOR OFF, press CURSOR ON/OFF to turn the LED off and turn on the cursor.



GPIB is a remote setting.
In remote setting, LED of GPIB LOCAL is turned off. Press GPIB LOCAL (LED will be lit on)
to make it the local setting.
“5.2.4 Remote/local behavior“■ GPIB and RS-232C do not operate properly.


GPIB setting and RS-232C setting are not correct.
RX4718W is equipped with two interfaces, GPIB and RX-232C but they can not be used at thesame time.
To use GPIB, set it correctly. The redundancy of GPIB address between devices or the wrong
address often causes the error.
“5.2.3 Setting of GPIB“
To use RS-232C, set it correctly.
“6.2.4 Setting of RS-232C“The operating environment is not good such as presence of external noise.
GPIB and RS-232C are the interfaces which should be used in the good operating environment.
Avoid using them in the operating environment where external noise is present.

■ The power is not turned on.
The setting of the power supply input selector switch is not correct.
Set it correctly.
“2.3 Grounding and power supply“■ LED of FAULT remains on.


Master/slave setting is not correct.
RX4718W remains the LED of FAULT on if it is set to slave when the supplied master/slave
control daisy-chain cable is not connected to the parallel control signal.
Set it to “Separate” if the RX4718W is used as a single unit.
“4.1.1 Master/slave setting“

RX4718W

7-6

8. Maintenance

8.1
8.1.1
8.2
8.3
8.4
8.4.1
8.4.2
8.4.3
8.4.4
8.4.5

RX4718W

Daily cleaning ·················································· 8-2
Memory backup battery······································ 8-2
Storage･Repacking･Transportation ······················ 8-3
How to check the version number ························ 8-3
Performance test ·············································· 8-4
Preparation before performance test ····················· 8-4
Output amplitude･phase ···································· 8-5
Distortion rate ·················································· 8-6
Frequency accuracy ·········································· 8-6
Timer accuracy ················································ 8-7

8-1

8.1 Daily cleaning

8.1

Daily cleaning■ When the panel or case is dirty
Wipe it with a soft cloth. When the stain is hard to remove, use the cloth dipped in the neutral detergent.
Never use volatile solvent like thinner or benzene or a wipe because it may degenerate the panel/case ordamage the coating.
■ Removal of dust inside
RX4718W uses air cooling with blower to make it light and small. If it is used in the dusty environment,
dust may enter inside resulting in the insulation failure and contact failure.
We clean the inside of the RX4718W when calibration is performed. Regular calibration isrecommended.

8.1.1

Memory backup battery

While the RX4718W is connected to the power, the battery used for backup is charged with a low
current.
A memory backup period when the battery is fully charged is about 60 days but it varies depending on
the product and also varies depending on the ambient temperature.
It takes approximately 100 hours to charge the battery from a fully discharged condition to a fully
charged condition. Then, if the battery is kept charged for over 200 hours a week, it keeps a fully
charged condition. Continuous charging will not cause overcharging.
When the battery deteriorates, its backup period becomes shorter. If it comes to a point where thebattery is no longer useful, our company will replace it with a new one at cost to customer.
Since the useful life of the battery greatly changes according to the operating conditions (charging state,ambient temperature, ambient humidity), it is meaningless to generalize, but if the battery maintains its
fully charged condition, it is expected to take 3 to 5 years until the battery capacity reduces by half.
Storing the battery without charging for 6 months or more may drastically shorten the useful life of thebattery, and therefore it is recommended to sometimes connect the power to the RX4718W.

RX4718W

8-2

8.2 Storage･Repacking･Transportation

8.2

Storage･Repacking･Transportation■ Storage when RX4718W is not used for a long termDisconnect the power cable from the receptacle and the RX4718W.
Store the RX4718W on the shelf or rack to avoid any falling objects and dust.



Put the cloth or plastic cover on the RX4718W if dust may be accumulated.



The temperature range for storage is from –10 to +50℃ and the relative humidity range is from 5
to 95％RH. Avoid the place where radical temperature change may occur or the direct sunlight andstore the RX4718W at room temperature.

■ Cautions for repacking and transportation


Cover the RX4718W with a plastic bag or sheet.

Prepare a cardboard box which tolerates the weight of the RX4718W with a sufficient room. Whenpacking, protect the RX4718W by placing the cushioning materials into its six sides.



For transportation, instruct the transportation company that the RX4718W is a precision instrument.

8.3

How to check the version number

When the power of RX4718W is turned on, the version number of the built-in software is displayed on
the 【SETTING / DATA】.

SETTING/DATA

4717
Ver X.XX
SETTING/DATA

In addition, the version number can be inquired using “?VER” command of GPIB and RS-232C.

RX4718W

8-3

8.4 Performance test

8.4

Performance test

To guarantee the performance of RX4718W, calibration needs to be performed by us. Regularcalibration is recommended to guarantee the performance.
This chapter describes the items tested without using special tools or measurement instruments among
key items. If the test result shows that some items do not satisfy the specification, calibration or repair
will be needed.
Ask us for the detail of tests, calibration or repair.

8.4.1

Preparation before performance test

Check the following items before performance test.
That the power line voltage is within the rating (AC 85 to 115V or 180 to 240V).
That the ambient temperature is within the range of +15 to +35℃.
That the ambient humidity is within the range of 5 to 85％RH.
Prepare the measurement instrument and load non-inductive resistance equivalent to the followings.
Power multimeter (2721)

volts alternating current･alternating current: within ±0.1%,

phase: within ±0.1 ﾟ
Universal timer

accuracy 1×10-6 or more

Distortion rate meter

full scale 0.1% or less

Voltage load

200Ω

20W

156Ω

200W 125V range

40V range

1250Ω 100W 250V range

RX4718W

8-4

8.4 Performance test

8.4.2

Output amplitude･phase
Power multimeter (2721)

Load

Load

Load

Figure 8-1 Connection of power multimeter (2721) and load

■ Amplitude accuracy
The load is opened.
Set each range to its full-scale value and check that the accuracy is within the following range.
Amplitude accuracy: within ±0.5% of the full-scale value for each range (±0.2% typ.)■ Phase accuracy
The load is opened.
The phase accuracy of the voltage 2 and 3 is calculated with 63.5V in 125V range of voltage 1 as areference, and the phase accuracy of the voltage 1 is with 63.5V in 125V of voltage 3 as a reference.
Set each range to its full-scale value and check that the accuracy is within the following range.
Phase accuracy: within ±0.3°■ Load regulation
The load regulation is calculated from the measurement value when the rated load is connected withthe load open (no load) as a reference
Set at the full-scale values for each range and check that each load regulation meets the following
range.
Load regulation of amplitude: within ±0.2% (when the rated output amplitude･loadvariation is 100%.)
Load regulation of phase: within ±0.2° (when the rated output amplitude･load variatio
n is 100%.)

RX4718W

8-5

8.4 Performance test

8.4.3

Distortion rate

Lo
ad
負

Distortion
Lo
ad

rate
meter

Lo
ad

Figure 8-2 Connection of a distortion rate meter and load
Connect the rated load. Set each range to its full-scale value and check that the distortion rate of eachload is within the following range.
Distortion rate: within 0.5％ (at pure resistance rated load･rated voltage)

8.4.4

Frequency accuracy

Universal
timer

Figure 8-3 Connection of a universal timer (frequency accuracy)
Set the frequency mode to 50Hz FIX and 60Hz FIX. Check that the frequency accuracy meets thefollowing range.
Frequency accuracy: within ±30ppm

RX4718W

8-6

8.4 Performance test

8.4.5

Timer accuracy

Universal
timer

Figure 8-4 Connection of a universal timer (timer accuracy)
Set the operation mode to [HOLD MODE] and the timer mode to [INTERVAL].
Set the universal timer to the mode which measures the time from fall to rise.
Turn the fault duration function on and initiate the quick change to fault with the fault duration settingof 100ms, 1s, and 10s. After the fault duration has elapsed, the system returns to normal and the timer
stops.
With a measurement value of the universal timer as a standard, check that the accuracy of the timer
value of RX4718W meets the following range.
Timer accuracy: within ±(0.01%+1digit)
Note: The fault duration fluctuates about ±10ms.

RX4718W

8-7

9. Specification

9.1
9.1.1
9.1.2
9.2
9.3
9.4
9.5
9.6
9.7
9.8
9.9
9.10
9.10.19.10.2
9.11

RX4718W

Voltage･Current output rating ······························ 9-2
AC output························································ 9-2
DC output ······················································· 9-4
Signal generator ··············································· 9-5
Operation mode ··············································· 9-6
Timer ····························································· 9-9
Output selector ·············································· 9-10
Master/slave ·················································· 9-11
Amplifier input selection ··································· 9-12
Other functions ·············································· 9-13
Various input/output ········································ 9-13
Interface ······················································· 9-17
GPIB ···························································· 9-17
RS-232C ······················································· 9-17
General ························································ 9-18

9-1

9.1 Voltage output rating

9.1

Voltage output rating

9.1.1

AC output
Voltage output three phases

Rated output range

40V

125V

250V

AC output voltage
range

0 to 40V

0 to 125V

0 to 250V

AC output current
range

0 to 0.2A

0 to 0.8A

Note 1

Allowable load power
factor

0.7-1.0 (delay)

Rated load Note 2

200Ω

156Ω

Amplitude accuracy

Within ±0.5％ of each range full scale (±0.2％ typ.)Phase setting range-359.9° to +359.9°(delay setting)Phase accuracySetresolution
LoadregulationLine
regulation

0 to 0.2A

1250Ω

Within ±0.3°

Amplit
ude

1mV

0.01V

Phase

0.01V

0.1°

Amplitude

Within ±0.2％ (with rated output amplitude, load variation 100％)Phase

Within ±0.2°(with rated output amplitude･load variation 100％)

Amplitude

Within ±0.1％ (with rated output amplitude･power variation ±10％)

Phase

Within ±0.1°(with rated output amplitude･power variation ±10％)

Distortion rate

Within 0.5％ (with pure resistance rated load･rated output)

The unit is effective value (rms) unless specified otherwise.
The rating above applies when the output frequency is 48Hz to 62Hz and is a sine wave.
The rating above applies when the ambient temperature is +15 to +35℃ and the ambient
humidity is 5 to 85%RH.
The output voltage is specified by the output terminal. The phase is specified by a relative value ateach output.
Quick changes and sweeps are only possible within the same range.
Note 1: The output current available becomes smaller when the voltage output is 63.5V or less“Figure 9-1 Output voltage characteristics in the 125V range of voltage
output“
Note 2: The rated voltage output load has the minimum available resistance at the maximum v
oltage output.

RX4718W

9-2

9.1 Voltage output rating

125

出力電圧[V]

Output voltage [V]100
Output available range

75
63.5
50
25
0
0

0.2

0.4

0.6

0.8

1

Output出力電流[A]current [A]Figure 9-1 Output voltage characteristics in the 125V range of voltage output

RX4718W

9-3

9.1 Voltage output rating

9.1.2

DC output
Voltage output three phases

Rated output range
DC output
voltagerange
DC output
current
range

DC+
setting
DC-setting
DC+setting
DCsetting

125V

0 to +40V

0 to +125V

0 to +250V

0 to -40V

0 to -125V

0 to -250V

0 to -0.1A
400Ω

Rated load

1250Ω

2500Ω

Within ±1.0％ of each range full scale (±0.5％ typ.)

DC offset

Within ±0.5％ of each range full scale

Set resolution



250V

0 to +0.1A

Note 1

Amplitude accuracy

40V

10mV

0.1V

0.1V

Load regulation

Within ±0.5％ (with rated output amplitude･load variation 100％)

Line regulation

Within ±0.1％ (with rated output amplitude･power variation ±10％)

The rating above applies when the ambient temperature is +15 to +35℃ and the ambient humidity
is 5 to 85%RH.

The output voltage is specified by the output terminal. The phase is specified by a relative value ateach output.



Quick changes and sweeps are only possible within the same range.

Note 1: The rated voltage output load has the minimum available resistance at the maximum
voltage output.

RX4718W

9-4

9.2 Signal generator

9.2

Signal generator■ Number of output
3 channels:

voltage out■ Frequency mode
50Hz fixed, 60Hz fixed and internal (variable frequency)
Accuracy

within ±30ppm

Internal variable range 10.000 to 200.000Hz, 1mHz of resolution
External synchronization and line synchronization
External synchronization frequency range
Synchronization settling time

RX4718W

45 to 65Hz
within9-5

1s

9.3 Operation mode

9.3

Operation mode

The RX4718W has the following operation modes to facilitate performing various tests.
■ Manual mode
Allows a normal/fault state to be output freely according to the panel setting without affecting theoperations of a start signal or trip signal. The built-in timer does not operate.
The level of a trip input can be monitored from the LED on the front panel, making it possible tooperate frequencies, amplitudes, phases and waveforms while checking the relay operation.
■ Hold (HLD) quick change modeThis is a fault mode simulating the permanent fault. When the trip input operates, the amplifier output
returns to normal and remains unchanged if the trip input changes afterwards.
It quickly changes normal/fault states for each of elements such as frequency, amplitude, phase andwaveform and measures the relay operation/recovery time using the built-in timer through changes of atrip input.
Elements whose normal value matches the fault value are not quickly changed.
The following quick change control function is available in this mode.
Fault start phase

0 to 359.9°, resolution of 0.1° and function off

Quickly changes to fault when the setting phase is generated by quick change start command.
Pre-trigger time

10 to 6000ms, resolution of 1ms and function off

Quickly changes to fault when the setting time elapses after the quick change start command isgiven.
Fault duration

0.001 to 65.000s, resolution of 1ms and function off

If a trip input does not change within a set time, it is forcibly returned to a normal state.
■ Non-hold (NHD) quick change modeThis is a fault mode simulating the arc fault. The first trip input makes the amplifier output normal andwhen the trip input recovers, the amplifier output becomes fault, then quickly changes by the trip signal.
It quickly changes normal/fault states for each of elements such as frequency, amplitude, phase andwaveform and measures the relay operation/recovery time using the built-in timer through changes of atrip input.
When the normal command is received, the output becomes normal and the test ends. The amplifier
output remains normal even if the trip signal changes.
Elements whose normal value matches the fault value are not quickly changed.
The quick change control function is available in this mode as in the hold quick change mode.
■ Simultaneous operation/recovery measurement mode
In this mode, operation time and recovery time are measured simultaneously by one quick change.
Fault waiting time

0.01 - 9.99s, resolution of 10ms

This sets the time until the output recovers to a normal state after the operation time is measured.

RX4718W

9-6

9.3 Operation mode

■ Normal sweep
This performs a sweep between normal and fault values for each of elements such as frequency,
amplitude and phase. No sweep is applicable for elements whose normal value and fault value are thesame. There are two types of sweep: manual sweep and automatic sweep.
Automatic sweep automatically stops the sweep through a change of the trip input and allows
measurement of the operation value and recovery value of the protective relay from the panel display atthat time. During a fault direction sweep, the sweep is stopped through trip input operation and during anormal direction sweep, the sweep is stopped through recovery of the trip input.
Manual sweep needs input of the sweep position using keys such as MODIFY. The trip input state has
no effects on the sweep.
Mode

3 types of linear sweep, 1LG sweep (1-wire ground fault), 2LS sweep (2-wireshort-circuit)
Sweep operation

2-direction sweep from normal to fault and from fault to normal.

Manual sweep

ON/OFF (When this is turned off, automatic sweep is on.)Sweep time

1.0 - 1000.0s, resolution of 0.1s

■ Search sweep
This mode repeats sweeps between a normal value and fault value while slowing down the speed tomeasure more accurate operation time.
No sweep is applicable for elements whose normal value and fault value are the same.
Mode

3 types of linear sweep, 1LG sweep (1-wire ground fault), 2LS sweep (2-wireshort-circuit)
Sweep operation

sweeps for detecting the operating value and for detecting the recovery value.

Judge time

0.1s to 10.0s(Also used for DSK search sweep)

Setting of the time required for judging that the trip input change is determined.
Number of sweeps

1 to 10 times(Also used for DSK search sweep)

Setting of the number of sweeps repeatedOutput cut

on/off(Also used for DSK search sweep)

Setting of turning the output on (used) or off (unused) after measurement■ DSK search sweep
Operates a disk type protective relay with slow operation first, then carries out a search sweep andmeasures more accurate operating values and recovery values in a short time.
No sweep is applicable for elements whose normal value and fault value are the same.
Mode

3 types of linear sweep, 1LG sweep (1-wire ground fault), 2LS sweep (2-wireshort-circuit)
Sweep operation

sweeps for detecting the operating value and for detecting the recovery value.

Judge time

0.1s to 10.0s(Also used for search sweep)

Setting of the time required for judging that the trip input change is determined.
Number of sweeps

1 to 10 times(Also used for search sweep)

Setting of the number of sweeps repeatedOutput cut
RX4718W

on/off(Also used for search sweep)
9-7

9.3 Operation mode
Setting of turning the output on (used) or off (unused) after measurement
Trip waiting time

0.1 to 10.0s

Setting of the waiting time from the quick change caused by the operation start to change of thetrip.
■ Frequency sweep modeThis is a dedicated frequency relay measurement mode. It measures operation frequency, operation time,
recovery frequency and recovery time with a single sweep.
Sweep speed

0.001 to 9.999Hz/s, resolution of 1mHz/s

Setting of the frequency sweep speed
Crossover frequency 10.000 to 200.000Hz, resolution of 1mHz
Setting of the crossover frequency to measure the operation/recovery time.
Frequency hold time 0.01 to 650.00s, resolution of 0.01s
Setting of the holding time until the frequency sweep starts in the direction from the normal tofault.
Amplitude quick change ON/OFF
Setting whether to have quick change of the output amplitude and phase (on/off) when themeasurement starts.

RX4718W

9-8

9.4 Timer

9.4

Timer

This timer is used for a quick change operation. Connecting a trip signal from the protective relay
allows measurement of operation time (dynamic characteristic) of the protective relay.
■ Timer mode
Interval

Measures the time from the start of a quick change to the first trip input
operation point.

One-shotMeasures the time of operation width of the first trip input operation.

Train

Measures the total time of operation width of the trip input.

Start measurement

Measures the time from the operation start input to the trip input■ Measurement range
3 ranges of 0 to 9999.9ms, 10.000 to 99.999s and 100.00s to 999.99s
Automatic range switching■ Measurement accuracy
Within ± (0.01%+1 digit)■ Timer setting
Timer clear
Automatic

Automatic clear of the timer value when quick change operates.

ManualClear of the timer value by clear key operation.

Automatic recoveryONrecovers to normal with the trip input operation in the hold quick change
mode.

OFF

does not recover to normal and remains fault with the trip input operation in
the hold quick change mode.

RX4718W

9-9

9.5 Output selector

9.5

Output selector

Switch the voltage output to the front terminal or side terminal.
The side terminal is 2-system (1L/2L) 3-phase 4-wire output, and ground fault and short circuit (line toline) of 3-phase or 1-phase can be selected.
For 3-phase, the voltage 1 to 3 are connected to the 3-phase 4-wire connector and 1L or 2L output isselected. Phase selection of R, S and T switches the output value of the voltage output 1 to 3 to theadjacent phase.
For 1-phase, the voltage output 1 outputs 1L and the voltage output 3 outputs 2L but the voltage output
2 does not output. Phase selection of R, S and T allows selecting one interphase or line.
■ Setting of output selector
Front terminal

All three phases are output to the front terminal.

Side terminal 3-phase
Connect voltage 1 to 3 to a 3-phase 4-wire cable and select 1L or 2L output.
Selection from R to S, S to T, T to R: voltage output 1→2, 2→3, 3→1
Selection from R to T, S to R, T to S: voltage output 1→3, 2→1, 3→2Side terminal single-phase
Voltage output 1 output to 1L and voltage 3 to 2L but voltage 2 does not output.
Ground fault

selects between R and N, S and N or T and N by phase selection.

Short circuit

selects between R and S, S and T or T and R by phase selection.

■ Voltage output 1L, 2L (side terminal)
Output format

floating, withstand voltage between chassisesAC500Vrms 1min,
SNS type metal connector with 6 pins (manufactured by Sanwa Denki Kogyo

Co., Ltd.)Pin connection

RX4718W①-R, ③-S, ⑤-T, ②-N

9-10

9.6 Master/slave

9.6

Master/slave

It is possible to connect 2 to 4 RX4718W units and use them as a multi-phase protective relay tester bymaking daisy-chain connections of accessory parallel control cables one by one to the parallel control
signal connectors.
Through operations of the master unit only, it is possible, to synchronize frequencies with the master
unit, make phase setting between the units possible and perform simultaneous operations of quickchanges and sweeps.
■ Master/slave setting
Master

RX4718W becomes a master unit.

Separate

RX4718W is used as a single unit.

Slave

RX4718W becomes a slave unit.

■ Selector communication function ON/OFF
This function turns the synchronization of R, S, ant T states on/off between the devices equipped withthe output selector of this series when the master/slave operation is on.
■ Trip phase selection function
This function is available when this series 4741 is the following version.
Japanese version 1.32, 1.34, 1.42
English version

1.33, 1.35, 1.43

When 4741 is a master device, total test mode, and line PD, the trip phase of RX4718W (the amplitude
is 0) is set if the fault sequence is trip.
Three phases (all phases), R (V1), S (V2), T (V3), R-S (V1 and V2), S-T (V2 and V3), T-R (V3 and V1)■ Parallel control signal
This is a connector to make daisy-chain connections of supplied parallel control cables in themaster/slave function.
FormatRX4718W

chassis potential in the common side, 36-pin multi-connector

9-119.7 Amplifier input selection

9.7

Amplifier input selection

This function drives the amplifier of RX4718W with external signals using the external signal
input/output and drives the external booster using the internal synthesizer signal of RX4718W.
■ Setting of input selection
Internal
The amplifier output signal is an internal synthesizer signal.
External output
The external signal output drives the external booster. The output amplitude of the externalbooster is set as follows.
Voltage output setting range:

0.0 to 999.99V■ External signal output
This is a synthesizer output inside the RX4718W and used to drive the external amplifier.
Number of output phases

3 phases of voltage three phases

Output format

Unbalanced, common side: chassis potential, BND receptacle.

Output voltage

1Vrms (when rated value is set for each range)

Output phase

In phase to voltage output terminal

Output impedance

10Ω or less

RX4718W

9-12

9.8 Other functions

9.8

Other functions■ Amplifier output on/off control
On/off for each phase, on/off for all phases (ON is enabled/disabled by the internal dip switch.)■ PSW mode (setting of the fault command key operation on the front panel.)
Alternate (fault is retained once pressed), momentary (fault when pressed, normal when released)■ Phase setting minus on/off■ Interlock 3φThis allows changing the set values of three phases (amplitude or phase) simultaneously.
■ Balanced 3φ
This allows setting of balanced 3-phase state with the output where the cursor is placed as areference.
■ 1LG settingThis sets up 1LG (1-wire ground fault in the resistance ground system) fault setting. Setting thezero phase voltage at fault calculates each voltage set value for 1LG fault setting and completes thesetting automatically.
Ground fault phase selection V1, V2, V3
Zero phase voltage 0.000～999.99V■ 2LS settingThis sets up 2LS (2-wire short circuit) fault setting. Setting the line to line voltage at fault
calculates each voltage set value for 2LS fault setting and completes the setting automatically.
Short-circuit phase selection

V1-V2, V2-V3, V3-V1

Line to line voltage 0.000～1732.0V■ Line to line voltage calculation
Setting of 3-phase amplitude and phase calculates the normal/fault zero phase voltage and line toline voltage.
■ Phase rotation
This rotates the value of voltage output 1 to 3 from V1, V2 to V3 and from V3, V2 and V1.
■ Beep setting on/off■ Panel setting memory
Read, write, comment input, 50Hz/60Hz initial value read, all memory clear.
■ Internal dip switch setting
Description
When RX4718W is a master, all output ON is sent to the slave.
All output ON of RX4718W
Wave select +DC/-DC function
When the external signal output is off, the signal amplitude is 0.

RX4718W

9-13

Setting detail: *indicates thefactory setting.
ON(disable)/*OFF(enable)
ON(disable)/*OFF(enable)*ON(disable)/OFF(enable)*ON(disable)/OFF(enable)

9.9 Various input/output

9.9

Various input/output■ Operation start inputThis is the input signal to start a quick-change or sweep operation by an external signal. It has the input
logic setting and stop setting function.
When the stop setting is turned on, the quick-change or sweep operation can be stopped by removing
the signal.
Input format

voltage and contact, binding post

Voltage input

floating, withstand voltage between chassises AC250Vrms 1 min

Voltage input range

0 to +130V

Input impedance

20kΩ

Threshold voltage
Contact input

High level: +2.5V
Low level: +1.0V
floating, withstand voltage between chassises AC250Vrms 1 min

Open voltage+5V

Short-circuit current

10mA

Logic setting

apply a、remove b

Stop setting

ON/OFF■ Trip inputThis is the operation-signal-input terminal of the protective relay. This is used to control the timer andnormal/fault and to automatically stop the sweep operation. It has the input logic setting and chatteringcorrection function.
Input format

voltage and contact, binding post

Voltage input

floating, withstand voltage between chassises AC250Vrms 1 min

Voltage input range

0 to +130V

Input impedance

20kΩ

Threshold voltage of +2.5V terminal

High level: +2.5V
Low level: +1.0V

Threshold voltage of +8V terminal

High level: +8.0V
Low level: +5.0V

Threshold voltage of +50V terminal
Contact input

High level: +50.0V
Low level: +40.0V
floating, withstand voltage between chassises AC250Vrms 1 min

Open voltage+5V

Short-circuit current

10mA

Logic setting

apply a、remove b

Chattering correction time

1 to 100ms, resolution of 1ms and function off

RX4718W

9-14

9.9 Various input/output■ Quick change command inputThis is the external signal input to directly control the output of the RX4718W from a normal to fault
state. When High, it is in a normal state and when Low, a fault state.
It is mainly used to perform simultaneous quick-change control in combination with out 4705A and tocontrol the RX4718W by a command of the 4705A (REMOTE OUTPUT).
Input format

logic signal, chassis potential: common side, binding post

Voltage input range

0 to +130V

Input impedance

10kΩ

Threshold voltage

High level: +2.5V
Low level: +1.0V■ Quick change command delay output
This is the signal that changes when the output of the RX4718W quickly changes. When the RX4718W
is in a fault state, it becomes Low.
It is mainly used to perform simultaneous quick-change control in combination with out 4705A and tocontrol the RX4718W by a command of the 4705A (REMOTE INPUT).
Output format

logic signal, chassis potential: common side, binding post

Voltage output range 0 to +5V■ Quick change command direct output
This is the signal that changes when the RX4718W start operating. It is Low when the RX4718W is inoperation.
It is mainly used to perform simultaneous quick-change control in combination with out 4705A and tocontrol the RX4718W by a command of the 4705A (REMOTE INPUT).
Output format

logic signal, chassis potential: common side, binding post

Voltage output range 0 to +5V■ Pre-trigger output
This is the signal to start the oscillator.
When the RX4718W starts operation, the voltage output becomes Low and the contact output becomesshort-circuit. It recovers in approx. 0.1 sec after the quick change command direct output recovers.
Output format

Voltage and contact, binding post

Voltage output

Chassis potential: common side

Voltage output range
Contact output

0 to +5V

floating, withstand voltage between chassises AC250Vrms 1 min

Contact capacity

AC30V/0.1A, DC30V/0.2A■ Frequency synchronization signal output
This is the output signal synchronized with the output frequency of the RX4718W. The falling edge ofthe signal is phase 0 degrees.
Mainly used connected with our 4705A(SYNC INPUT).
Output format

logic signal, chassis potential: common side, binding post

Voltage output range 0 to +5V

RX4718W

9-15

9.9 Various input/output■ Expanded external response inputThis is a connector connected to the expanded response input box (optional) to expand the trip input up
to 255 channels.
Output format

50-pin multi-connector

Signal format

response signal input: floating, withstand voltage between chassises

AC250Vrms 1 min, control output for signal selection: chassis potential
Selected address

0 to 255

Simultaneous selection disabling signal
Power supply output

RX4718W

1 bit+24V, 100mA

9-16

9.10 Interface

9.10

Interface

9.10.1 GPIB
The GPIB cannot be used simultaneously with the RS-232C.
■ Setting items

All front panel settings except power switch, GPIB address and RS-232C parameters
Arbitrary waveform data
■ Code used
ISO 8-bit codes, alphabet upper/lower case-insensitive■ SRQ factors
Output overload, timer measurement end, sweep end, error generation■ SRQ mask
Individually maskable■ Interface function
SH1, AH1, T5, L4, SR1, RL1, PP0, DC1, DT0, C0

9.10.2 RS-232C
The RS-232C cannot be used simultaneously with the GPIB.
■ Setting items

All front panel settings except power switch, GPIB address and RS-232C parameters
Arbitrary waveform data
■ Baud rate
Switching of 6 points; 300, 600, 1.2k, 2.4k, 4.8k and 9.6k
■ Data bit length
8 bits■ Stop bit length
1 bit or 2 bits
■ Parity
NONE, EVEN or ODD

RX4718W

9-17

9.11 General

9.11

General■ Power supply
48Hz-62Hz

AC85V-115V, AC180V-240V■ Maximum power consumption
800VA■ Withstand voltage
Between total power input and chassis

AC 1500V, one minuteBetween total voltage output and chassis

AC 500V, one minuteBetween total current output and chassis

AC 500V, one minuteBetween trip input and chassis

AC 250V, one minuteBetween operation start input and chassis

AC 250V, one minuteBetween pre-trigger contact output and chassis

AC 250V, one minuteBetween control power output and chassis

AC 250V, one minute■ Performance guarantee temperature and humidity+15 to +35℃, 5 to 85%RH

No condensation■ Operation guarantee temperature and humidity
0 to +40℃, 5 to 85%RH

No condensation■ Storage temperature and humidity-10 to +50℃, 5 to 95%RH

No condensation■ External dimensions
430(W)×249(H)×469(D)mm

not including protrusions｢Figure 9-2 External dimensions｣■ Weight
19kg

RX4718W

9-18

RX4718W

Figure 9-2 External dimensions

9-19

Surface treatment
Front panel: painting munsell 5Y8.5/1 semi-gloss
Side panel: painting munsell 5Y6.5/1 leather tone
Cover: painting munsell 5Y6.5/1 leather tone

Front view

Top view (with cover)

Right side view

Left side view

9.11 General

WARRANTYNF Corporation certifies that this instrument was thoroughly tested and inspected andfound to meet its published specifications when it was shipped from our factory.
All NF products are warranted against defects in materials and workmanship for a periodof one year from the date of shipment. During the warranty period of, NF will, at its option,either will repair the defective product without any charge for the parts and labor, or either
repair or replace products which prove to be defective. For repair service under warranty, theproduct must be returned to a service center designated by NF. Purchaser shall prepay all
shipping cost, duties, and taxes for the product to NF from another country, and NF shall pay
shipping charge to return the product to purchaser.
This warranty shall not apply to any defect, failure or damage caused by improper use,
improper or inadequate maintenance and care or modified by purchaser or personnel otherthan NF representatives.

NF Corporation

If there are any misplaced or missing pages, we will replace the manual.
Contact the sales representative.

NOTES:
 Reproduction of the contents of this manual is forbidden by applicable laws.
 The contents of this manual may be revised without notice.
 Information provided in this manual is intended to be accurate and reliable. However,
we assume no responsibility for any damage regarding the contents of this manual.
 We assume no responsibility for influences resulting from the operations in thismanual.
Copyright 2008, NF Corporation

RX4718W Protective Relay Tester Instruction Manual

NF Corporation
3-20 Tsunashima Higashi 6-chome, Kohoku-ku. Yokohama-shi
223-8508, JAPAN
Phone: 81-45-545-8128 Fax: 81-45-545-8187

http://www.nfcorp.co.jp/

NF Corporation
6-3-20, Tsunashima-higashi, Kohoku-ku, Yokohama 223-8508 JAPAN