PROGRAMMABLE AC/DC POWER SOURCE

Three-phase/Single-phase Selectable System(Cabinet Type)

ES 6000W (6 kVA)
ES 12000W (12 kVA)
ES 18000W (18 kVA)
INSTRUCTION MANUALNF Corporation

DA00020743-001

P-STATION/ES Series
Programmable AC/DC Power Source
Three-phase/Single-phase Selectable System(Cabinet Type)
ES 6000W (6 kVA)
ES 12000W (12 kVA)
ES 18000W (18 kVA)

INSTRUCTION MANUAL

---- Preface ---Thank you for purchasing our “P-STATION/ES-series Programmable AC/DC Power Source”.
For safe use of this electrical product, read “Safety Precautions” on the next page before using it.
Warning symbols appearing in this Instruction Manual
The warning symbols shown below are used in this manual. Be sure to follow the warnings
and cautions indicated by these symbols to ensure users' personal safety and protect against
damage to equipment.

！

WARNING

Together with this symbol, information is provided to prevent users from encountering hazards, suchas electric shock, that could result in serious injury or death when they handle the device.

！

CAUTION

Together with this symbol, information is provided in order to prevent damage to equipment whenusers handle the device.



The Instruction Manual consists of the chapters outlined below.
Before using this product for the first time, read this manual, starting with Chapter 1,“Overview.”

1.

Overview
The chapter provides confirmation items that must be made before the device is used.

2.

Part Names
The chapter gives the names and descriptions of parts of each model.

3.

Grounding and Connections
The chapter provides information you should keep in mind during installation and until thedevice is turned on, to prepare the device for use.

4.

Operations
The chapter describes basic operations and advanced functions.

5.

Specifications
The chapter contains specifications (on functions and performance).

6.

MaintenanceThe chapter explains how to perform basic operational tests and describes routine
maintenance.

7.

Troubleshooting
The chapter explains error messages and the phenomena considered to be failures, and it
describes the appropriate action to be taken.

8.

Supplementary Information
The chapter contains supplementary information to provide a better understanding of thedevice.

ES 6000W/12000W/18000Wi---- Safety Precautions ---To use the device safely, be sure to follow the warnings and cautions given below.
NF Corporation takes no responsibility for and does not warranty against damage that may haveoccurred as a result of a failure to comply with these warnings and cautions.
This product is an insulation standard class I device (with protective conductor terminals) as definedby the JIS and IEC standards.
Be sure to follow instructions in the Instruction Manual.
The Instruction Manual provides users with information on the operation and safe use of thisproduct.
Read the manual before using the product.
All warnings in the manual are provided to prevent hazardous situations possibly leading toserious accidents from occurring. Be sure to follow these warnings.

Connect this product to ground.
This product uses a line filter, which may cause electric shock if the product is not grounded.
To prevent such electric shock, be sure to connect the product securely to ground.
Connect the ground terminal on the rear panel to ground with a cable as thick as or thicker
than the power cord.



Check the power supply voltage.
This product operates on the power supply voltage specified in “Grounding and Power
Connections.”
Before connecting the product to a power supply, make sure that the power supply voltage
conforms to the power supply voltage rating of the product.
When this device operates for a long time under a load condition, the exhaust vent on theback of the device becomes hot. Be careful not to touch this part.
To reduce the risk of the device being dropped during handling, do not lift it by its handle.
The device uses dedicated accessories, peripherals, and options. Never use them for a
purpose other than the installation and operation of the device.
To prevent electric shock and failures, do not turn on the device when a cord or unit is
disconnected. Also, do not remove a unit when power is on.
To prevent electric shock and failures, never allow foreign matter or liquid to enter thedevice.
To prevent electric shock and failures, turn off the device before attaching a cable to or
detaching one from the remote sensing terminal. When the cable is attached to the terminal,
make sure that the metal part of the cable is covered.

When a problem may have occurred
If smoke or an abnormal smell or sound is coming from the device, turn off the device
immediately and stop device operations.
In such an event, disable operation of the device until it is repaired, and contact our office oragent who sold you the device.

ES 6000W/12000W/18000Wii



Do not use the device in an environment where an explosive gas (such as
propane or kerosene) is present.
There is a danger of explosion.

Do not remove the covers.
The device contains high-voltage parts. Never remove the covers.
Even when the inside of the device must be checked, only authorized service engineers
should handle the internal parts directly.



Do not retrofit the device.
Never retrofit the device. Otherwise, new and unforeseeable risks may arise, and NF
Corporation may refuse your request for repair.

Safety-related symbols
General definitions of safety-related symbols on the device and in the Instruction Manual are
given below.

Manual reference！

This symbol notifies users of a potential danger, and it appears on
parts that require users to refer to the Instruction Manual.
Danger of electric shock
This symbol appears on parts that could cause electric shock undercertain conditions.
Protective ground terminal
This symbol appears on terminals that must be grounded toprevent electric shock.
Before using the device, be sure to connect such terminals toground.
！

WARNING

Warning
Together with this symbol, information is provided in order toprevent users from encountering hazards, such as electric shock,that could result in serious injury or death.

！

CAUTION

CautionTogether with this symbol, information is provided in order toprevent damage when users handle the device.

Other symbols
This symbol indicates the ON position of a power switch.
This symbol indicates the OFF position of a power switch.
This symbol indicates that the external conductor of a connector is connected to thecase.
This symbol indicates that the external conductor of a connector is connected tosignal ground.

ES 6000W/12000W/18000W

iii

ContentsPage

1. Overview
1.1 Features ............................................................................... 1-1
1.2 Manual Configuration ........................................................... 1-2
1.3 Accessory List Used for Confirmation .................................. 1-3
2. Part Names
2.1 Controller (Common to Each Model) .................................... 2-1
2.1.1
2.1.2

2.2

Front Operation Panels (Common to Each Model) .............. 2-5
2.2.1
2.2.2

2.3

Front section .......................................................................... 2-11
Rear section........................................................................... 2-12
Power supply input/output panel ............................................ 2-13

ES 12000W (12 kVA) ......................................................... 2-14
2.7.1
2.7.2
2.7.3

2.8

Rear signal panel (master) ....................................................... 2-6
Rear signal panel (slave) ......................................................... 2-7

Control Section (Common to Each Model) ........................... 2-9
Rear Subpanel (ES 6000W/ES 12000W) ........................... 2-10
ES 6000W (6 kVA) ............................................................. 2-11
2.6.1
2.6.2
2.6.3

2.7

Power operation panel ............................................................. 2-5
Phase switching panel ............................................................. 2-5

Rear Panels (Common to Each Model) ................................ 2-6
2.3.1
2.3.2

2.4
2.5
2.6

Controller (top) ......................................................................... 2-1
Controller (bottom) ................................................................... 2-3

Front section .......................................................................... 2-14
Rear section........................................................................... 2-15
Power supply input/output panel ............................................ 2-16

ES 18000W (18 kVA) ......................................................... 2-17
2.8.1
2.8.2
2.8.3
2.8.4
2.8.5
2.8.6
2.8.7
2.8.8

Phase L1 (U) and L2 (V) cabinet: Front section ................... 2-17
Phase L1 (U) and L2 (V) cabinet: Rear section ................... 2-18
Phase L3 (W) cabinet: Front section ................................... 2-20
Phase L3 (W) cabinet: Rear section .................................... 2-21
Power supply input/output and relay input panel(Phase L1 (U) and L2 (V) cabinet) ......................................... 2-22
Power supply input and relay output panel(Phase L3 (W) cabinet) .......................................................... 2-23
Rear subpanel (Phase L1 (U) and L2 (V) cabinet) ................. 2-23
Rear subpanel (Phase L3 (W) cabinet) .................................. 2-24

3. Grounding and Connections
3.1 Installation Environment ....................................................... 3-1
3.2 Grounding and Power Connections ..................................... 3-2
3.2.1
3.2.2

3.3

Grounding ................................................................................ 3-2
Power supply ........................................................................... 3-2

Connections to I/O Terminals ............................................... 3-3
3.3.1

Connection to the power input terminal .................................... 3-3

ES 6000W/12000W/18000W

iv

Contents

3.3.2
3.3.3

3.4

Connecting the Control Terminals ........................................ 3-6
3.4.1

3.5
3.6
3.7

Connections to the output terminals ......................................... 3-4
ES 18000W I/O terminal connection diagram .......................... 3-5
Control terminal connection diagram........................................ 3-6

Fuses ................................................................................... 3-7
Checking Connections ......................................................... 3-8
Powering On and Off and Checking Operation .................. 3-10

4. Operations
4.1 Notational Conventions ........................................................ 4-1
4.2 Basic Operations .................................................................. 4-2
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
4.2.7
4.2.8
4.2.9

4.3

Advanced Operations......................................................... 4-10
4.3.1
4.3.2
4.3.3
4.3.4

4.4

4.5.2
4.5.3

Precision and high stability (setting of the compensationmode) .................................................................................... 4-24
Remote sensing AGC (AC output mode) ................................ 4-25
Auto calibration (output voltage calibration function) .............. 4-28

Using External Signals ....................................................... 4-30
4.6.1

4.7

Quick voltage change (with the frequency unchanged) .......... 4-19
Voltage variation (with a frequency variation) ......................... 4-22

Obtaining Precise Output ................................................... 4-24
4.5.1

4.6

Setting limit values ................................................................. 4-10
Line synchronization .............................................................. 4-11
Memory .................................................................................. 4-12
Memory storage and initial settings ........................................ 4-16

Low-frequency Immunity Tests ........................................... 4-18
4.4.1
4.4.2

4.5

Switching between three-phase mode and single-phasemode ........................................................................................ 4-2
Detaching and attaching the controller ..................................... 4-3
Setting the output voltage and output voltage range ................ 4-3
Setting the output frequency .................................................... 4-5
Turning output on and off ......................................................... 4-6
Key lock ................................................................................... 4-6
Switching between DC and AC output modes .......................... 4-6
Measurement function ............................................................. 4-7
Protection function ................................................................... 4-9

External input (factory-installed option) .................................. 4-30

Introduction of Other Products of the Same Family,
Peripherals, and Options.................................................... 4-33
4.7.1
4.7.2
4.7.3

ES 4473 interface board ........................................................ 4-33
ES 4474 remote terminal ....................................................... 4-33
ES 0406E IEC testing software .............................................. 4-34

5. Specifications
5.1 Three-phase/single-phase switching system(cabinet type) ....................................................................... 5-1
5.1.1
5.1.2
5.1.3

Output rating ............................................................................ 5-1
AC output ................................................................................. 5-2
DC output (valid only in single-phase operation) ...................... 5-5

ES 6000W/12000W/18000W

v

Contents

5.1.4 Measurement function ............................................................. 5-7
5.1.5 AGC and remote sensing (AC output mode) ............................ 5-8
5.1.6 Auto calibration (AC output voltage calibration function) .......... 5-9
5.1.7 Memory function ...................................................................... 5-9
5.1.8 Limit value setting .................................................................... 5-9
5.1.9 Key lock ................................................................................... 5-9
5.1.10 Low-frequency immunity tests .................................................. 5-9
5.1.11 Three-phase/single-phase switching ...................................... 5-11
5.1.12 Interface board (option) .......................................................... 5-11
5.1.13 External signal input (AC output mode: factory-supplied
option) .................................................................................... 5-12
5.1.14 Power supply input................................................................. 5-12
5.1.15 Other information ................................................................... 5-13

6. Maintenance
6.1 Cleaning the Air Filter ........................................................... 6-1
6.2 Backup Battery ..................................................................... 6-2
6.3 Gain Adjustment ................................................................... 6-3
6.4 Operation Checks ................................................................ 6-4
6.4.1

Check method .......................................................................... 6-4

7. Troubleshooting
7.1 Error Messages .................................................................... 7-1
7.2 When an Error Seems to Have Occurred ............................. 7-2
8. Supplementary Information
8.1 Terminology .......................................................................... 8-1

ES 6000W/12000W/18000W

vi

Figures
Page

Figure 4-1
Figure 4-2
Figure 5-1
Figure 5-2
Figure 5-3
Figure 5-4
Figure 5-5
Figure 5-6
Figure 5-7
Figure 5-8

Detaching the controller ................................................................... 4-3
Fastening the controller while it faces upward ............................... 4-3
Output voltage vs. output current characteristic ............................... 5-3
Output frequency vs. output current characteristic ........................... 5-3
Output frequency vs. minimum load power factor that allows
supply of the maximum output current........................................... 5-4
Load power factor PF vs. output current .......................................... 5-4
Output voltage in DC output mode vs. output current
characteristic ................................................................................. 5-6
Output voltage vs. frequency characteristic.................................... 5-14
Total harmonic distortion ratio vs. frequency characteristic ............ 5-15
Load regulation vs. frequency characteristic .................................. 5-15

ES 6000W/12000W/18000W

vii

Tables
Page

Table 1-1
Table 1-2
Table 1-3
Table 4-1
Table 4-2
Table 4-3
Table 4-4

Packing list for the ES 6000W (6 kVA) ............................................... 1-3
Packing list for the ES 12000W (12 kVA) ........................................... 1-3
Packing list for the ES 18000W (18 kVA) ........................................... 1-3
Setting memory configuration .......................................................... 4-13
Setting memory configuration in external input mode ...................... 4-13
Memory storage and initial settings ................................................. 4-16
Supported standard tests ................................................................. 4-34

ES 6000W/12000W/18000W

viii

1. Overview
1.1
1.2
1.3

ES 6000W/12000W/18000W

Features............................................................................... 1-1
Manual Configuration ........................................................... 1-2
Accessory List Used for Confirmation .................................. 1-3

1.1 Features

1.1

Features
The “P-STATION/ES-series Programmable AC/DC Power Source” products can simulate power
supply environments. Performance, functionality, compact and lightweight, and ease of use areemphasized in this series.
This product allows you to switch between three-phase and single-phase systems. The output powerof each model of this cabinet system is 6 kVA for the ES 6000W, 12 kVA for the ES 12000W, and18 kVA for the ES 18000W.
To switch between three-phase mode and single-phase mode, manually set the switch before turningon the system.
Because the output voltage has low waveform distortion and features a stable voltage level andfrequency, it is suitable for the power supplied in performance testing of electronic devices and EMC
measurements.
The following options are available:
ES 0406E IEC testing software
ES 4153 reference impedance network
ES 4474 remote terminal
ES 4473 interface board
Component type and cabinet type
The “P-STATION/ES-series Programmable AC/DC Power Source” come in two types:
component and cabinet. The component type allows you to use components with output
power of 2 kVA, depending on the output format and power required. With this type, you canchange the output power and output format by adding components or changing the
combination of components. The cabinet type is an integrated product with output power of
6 kVA or higher. In comparison with the component type having the same output power, thecabinet type requires less floor space for installation and I/O cables are easier to connect toit.

Compatibility with P-STATION/series [Q] system AC power sources
The “P-STATION/ES-series Programmable AC/DC Power Source” cannot be used with the
P-STATION/series [Q] 4400-series system AC power sources.

ES 6000W/12000W/18000W

1-1

1.2 Manual Configuration

1.2

Manual Configuration
This Instruction Manual covers the three-phase/single-phase switching system (cabinet type).
Manuals for this system do not provide information about other products.
For information about options and peripherals, see the Instruction Manual supplied with the relevant
product.
Programmable AC/DC Power Source P-STATION/ES-series Instruction Manuals

Single-phase System Instruction Manual
ES 2000S
ES 2000B

Three-phase System Instruction ManualSingle-phase Master
Booster

ES 2000U
ES 2000P
ES 2000B

I/O Unit Instruction Manual

Interface Board Instruction Manual
ES 44734481 Power Supply Input Unit
(6 kVA)
4482 Output Parallel Unit (6 kVA)

Interface Board

Distribution Unit Instruction Manual

IEC testing software
ES 0406E

IEC testing software

ES 4439

Remote Terminal

ES 6000W/12000W/18000W

Distribution Unit
(6 kVA)

Cabinet Instruction Manual

Remote Terminal Instruction Manual
ES 4474

Three-phase MasterThree-phase Slave
Booster*

1-2

Refer to the manual suppliedwith each cabinet.

1.3 Accessory List Used for Confirmation

1.3

Accessory List Used for Confirmation
Before installing the device, check for damage caused by an accident during transport and verify thatthe main units and the correct accessories are all included. If a main unit or accessory is missing,contact the agent who sold you the device.
Table 1-1

Packing list for the ES 6000W (6 kVA)
Item

Quantity

ES 6000W three-phase/single-phase switching system (cabinet type)1

Accessories
1

Instruction Manual (this document)
2Power cable (5.5 mm  4 conductors  5 m, VCT cable)

1

Fuse (normal fusing type, 2 A)

1

Table 1-2

Packing list for the ES 12000W (12 kVA)
Item

Quantity

ES 12000W three-phase/single-phase switching system (cabinet type)1

Accessories
1

Instruction Manual (this document)
2Power cable (22 mm  4 conductors  5 m, VCT cable)

1

Fuse (normal fusing type, 2 A)

1

Table 1-3

Packing list for the ES 18000W (18 kVA)
Item

Quantity

ES 18000W three-phase/single-phase switching system (cabinet type)1

Accessories
1

Instruction Manual (this document)2

Output relay cable (22 mm  3 conductors  2 m, VCT cable)

1

2

1

2

Power cable (22 mm  4 conductors  5 m, VCT cable)

1

Fuse (normal fusing type, 2 A)

1Power cable (5.5 mm  4 conductors  5 m, VCT cable)

1 eachControl cables A,B,C

When repacking the device for transport, use a box that is strong enough and large enough, and placecushioning with sufficient weight tolerance into the box in order to protect the device.

ES 6000W/12000W/18000W

1-3

2. Part Names
2.1

2.2

2.3

2.4
2.5
2.6

2.7

2.8

ES 6000W/12000W/18000W

Controller (Common to Each Model) .................................... 2-1
2.1.1 Controller (top) .......................................................... 2-1
2.1.2 Controller (bottom) .................................................... 2-3
Front Operation Panels (Common to Each Model) ............... 2-5
2.2.1 Power operation panel .............................................. 2-5
2.2.2 Phase switching panel .............................................. 2-5
Rear Panels (Common to Each Model) ................................ 2-6
2.3.1 Rear signal panel (master) ........................................ 2-6
2.3.2 Rear signal panel (slave) .......................................... 2-7
Control Section (Common to Each Model) ........................... 2-9
Rear Subpanel (ES 6000W/ES 12000W) ............................ 2-10
ES 6000W (6 kVA) .............................................................. 2-11
2.6.1 Front section ............................................................ 2-11
2.6.2 Rear section ............................................................ 2-12
2.6.3 Power supply input/output panel .............................. 2-13
ES 12000W (12 kVA) .......................................................... 2-14
2.7.1 Front section ............................................................ 2-14
2.7.2 Rear section ............................................................ 2-15
2.7.3 Power supply input/output panel .............................. 2-16
ES 18000W (18 kVA) .......................................................... 2-17
2.8.1 Phase L1 (U) and L2 (V) cabinet: Front section ..... 2-17
2.8.2 Phase L1 (U) and L2 (V) cabinet: Rear section ..... 2-18
2.8.3 Phase L3 (W) cabinet: Front section ..................... 2-20
2.8.4 Phase L3 (W) cabinet: Rear section ...................... 2-21
2.8.5 Power supply input/output and relay input panel(Phase L1 (U) and L2 (V) cabinet) ........................... 2-22
2.8.6 Power supply input and relay output panel(Phase L3 (W) cabinet) ............................................ 2-23
2.8.7 Rear subpanel(Phase L1 (U) and L2 (V) cabinet) ........................... 2-23
2.8.8 Rear subpanel (Phase L3 (W) cabinet) .................... 2-24

2.1 Controller (Common to Each Model)

2.1

Controller (Common to Each Model)

2.1.1

Controller (top)1

2

OUTPUT RANGEＤＩＳＰＬＡＹ ＭＯＤＥ
SET/
MEAS

SET

100V/
200V

MEAS

ＶＯＬＴＡＧＥ

1

4

V

5

6

7

KEY

LOCK

100V
200V

OUTPUT

ＤＣ
BUSY

ＣＵＲＲＥＮＴ／ＰＨＡＳＥ／ MEM ADRS

peak
rms

8

3

peak
rms

A

deg

OVERLOADOFFON

FREQUENCY/TIME/POWER

PF kVA kW ms s

10

9OFF/ONHz

11

DISPLAY MODE
Sets the display mode to “setting value” or “measurement value.”
4.2.8 Measurement function

2

OUTPUT RANGE
Sets the output voltage range.
4.2.3 Setting the output voltage and output voltage range

3

KEY LOCK
Key lock switch. Setting this switch to the top position activates the lock.
4.2.6 Key lock4DC
Lamp is on when DC output mode is selected.
In the three-phase/single-phase switching system, switching to DC output mode is possible
only in single-phase mode.

5

BUSY
Lamp is on during voltage range switching.
4.2.3 Setting the output voltage and output voltage range

6

OVERLOAD
Lamp is on when an overload is detected.

7

4.2.9 Protection function

OUTPUT OFF/ON
Turns output on and off.

ES 6000W/12000W/18000W

4.2.5 Turning output on and off

2-1

2.1 Controller (Common to Each Model)

8

VOLTAGE
Displays the setting value or measurement value of output voltage.
4.2.8 Measurement function

9

peak/rms
Lamps indicating whether the measurement value is a peak value or effective value.
4.2.8 Measurement function

10

CURRENT/PHASE/MEM ADRS
Displays the measurement value of the output current, quick-change phase, and memory
address.
4.2.8 Measurement function, 4.4.1 Quick voltage change (with the frequency
unchanged), and 4.3.3 Memory

11

FREQUENCY/TIME/POWER
Displays the output frequency, active/reactive power, power factor, quick-change time, andtransition time.
4.2.4 Setting the output frequency, 4.2.8 Measurement function, 4.4.1 Quick
voltage change (with the frequency unchanged), and 4.4.2 Voltage variation (with afrequency variation)

ES 6000W/12000W/18000W

2-2

2.1 Controller (Common to Each Model)

2.1.2

Controller (bottom)
13

16

MEASURE

ENTRY
VOLT

15

14

peak/
rms

FREQ

F/W/
VA/PF

Ｌ１／
Ｌ２／Ｌ３

DIGIT
Ｌ１

Ｌ２

Ｌ３

MODIFYDOWNUP12MEMORYSTO

12QUICK CHANGE

RCL

START

ＭＯＤＥ

GPIB

TRST
TIME

ＡＣ／ＤＣ

ADRS

18

19

ENBL

ＬＩＭＩＴ
SEL

SEL

UPR

ＲＳ－２３２
LCL

SEL

20

17
AUTO
CAL

PRCN

21

22

LINE
SYNC

23

ENTER

24

25

MEMORY
4.3.3 Memory

Stores and recalls settings from memory.
13

LWR

ENTRY
Sets the output voltage and output frequency.
4.2.3 Setting the output voltage and output voltage range and 4.2.4 Setting theoutput frequency

14

MEASURE
4.2.8 Measurement function

Used to select the measurement target.
15

MODIFY
Modify dial. It increases or decreases a setting value.

16

DIGIT
Moves the cursor in a setting to the left or right, and the digit value can be increased anddecreased by the modify dial.

17

ENTER
Ends the input of a setting.

18

TRST TIME
Sets the transition time.

19

4.4.2 Voltage variation (with a frequency variation)

AC/DC
Toggles between AC output mode and DC output mode.
In the three-phase/single-phase switching system, switching to DC output mode is possible
only in single-phase mode.

ES 6000W/12000W/18000W

2-3

2.1 Controller (Common to Each Model)

20

GPIB/RS-232
Used to specify interface-related settings. This is effective only when the ES 4473 interface
board is used.
4.7.1 ES 4473 interface board

21

QUICK CHANGE
Used to specify settings for quick-change tests on output voltage.
4.4.1 Quick voltage change (with the frequency unchanged)

22

PRCN
Changes the compensation mode.
4.5.1 Precision and high stability (setting of the compensation mode)

23

AUTO CAL
Performs auto calibration.
4.5.3 Auto calibration (output voltage calibration function)

24

LINE SYNC
Causes entry into the line synchronization state.

25

LIMIT
Sets limit values.

ES 6000W/12000W/18000W

4.3.1 Setting limit values

2-4

4.3.2 Line synchronization

2.2 Front Operation Panels (Common to Each Model)

2.2

Front Operation Panels (Common to Each Model)

2.2.1

Power operation panel
26

27

LINE

26

OFF

POWER

ON

LINE
Power lamp. It goes on when power is supplied to the power input terminal.

27

POWER
Power switch

2.2.2

Phase switching panel
28

ＳＩＮＧＬＥ ＰＨＡＳＥ

29

30

ＳＹＳＴＥＭ

ＴＨＲＥＥ ＰＨＡＳＥ

１φ

３φ
ＳＹＳＴＥＭ ＳＥＬＥＣＴＯＲ

28

SINGLE PHASE
Light that is on during operation in single-phase mode

29

SYSTEM
Used to switch between three-phase mode and single-phase mode. The switch setting is readat power-on time.

30

THREE PHASE
Light that is on during operation in three-phase mode

ES 6000W/12000W/18000W

2-5

2.3 Rear Panels (Common to Each Model)

2.3

Rear Panels (Common to Each Model)

2.3.1

Rear signal panel (master)
36

35

32

33

34

ＴＨＲＥＥ ＰＨＡＳＥ ＣＯＮＴＲＯＬ
Ｌ２ Ｌ３
(20R)

Ｌ２

AGC SENS
ON EXT

Ｌ３

Hi Lo

(20R)
OFF
QUICK CHANGE
SYNC OUTPUT

ＳＩＧＮＡＬ ＩＮＰＵＴ
SEL

EXT

INT

ＤＣ ＭＯＤＥＯＦＦＳＥＴ

INT

BOOSTER CONTROL

GAIN
TTL

±５Ｖ ＭＡＸ

ＥＳ ２０００Ｕ

37

31

38

39

40

41

42

Switches and connectors related to remote sensing AGC
4.5.2 Remote sensing AGC (AC output mode)

32

AGC
Sets AGC operation.

33

4.5.2 Remote sensing AGC (AC output mode)

SENS
Used to select the detection point for output voltage.
4.5.2 Remote sensing AGC (AC output mode)

34

Hi Lo
Terminals used for external detection of phase L1 (U) voltage.
4.5.2 Remote sensing AGC (AC output mode)

35

THREE PHASE CONTROL - L3
Connector for a connection to the ES 2000P three-phase slave.
Connect this terminal to the rear signal panel for phase L3 (W).
Be careful not to detach the connected cable.
3.4.1 Control terminal connection diagram

36

THREE PHASE CONTROL - L2
Connector for a connection to the ES 2000P three-phase slave.
Connect this terminal to the rear signal panel for phase L2 (V).
Be careful not to detach the connected cable.
3.4.1 Control terminal connection diagram

37

SIGNAL INPUT connector
Connector used for the input of external signals.
4.6.1 External input (factory-installed option)

ES 6000W/12000W/18000W

2-6

31

2.3 Rear Panels (Common to Each Model)

38

SEL
4.6.1 External input (factory-installed option)

Switch for selecting an input signal.
39

GAIN
6.3 Gain Adjustment

Adjusts the gain of the internal amplifier.
40

QUICK CHANGE SYNC OUTPUT
Connector from which a synchronous signal is output during a quick-change operation.
4.4.1 Quick voltage change (with the frequency unchanged)

41

DC MODE OFFSET
Adjusts the offset voltage in DC output mode.
The three-phase/single-phase switching system operates only in DC output mode.

42

BOOSTER CONTROL
Used for parallel connection using ES 2000B boosters.
Be careful not to detach the connected connector.

2.3.2

Rear signal panel (slave)
45

43

46

47
44

Ｔ ＨＲＥＥ ＰＨＡ ＳＥ Ｃ ＯＮＴ ＲＯＬ
AG C

SENS

ON

EXT

O FF

INT

Hi

(20R)

Q UICK CHANG E
SYNC O UTPUTＳＩ ＧＮＡＬ ＩＮＰ ＵＴBO OSTER CO NTRO L

G AIN
EXT

TTL

±５Ｖ ＭＡＸ

ＥＳ ２０００Ｐ

48

43

49

50

51

THREE PHASE CONTROL
Connector for a connection to the ES 2000U three-phase master.
Be careful not to detach the connected cable.
3.4.1 Control terminal connection diagram

44

Switches and connectors related to remote sensing AGC
4.5.2 Remote sensing AGC (AC output mode)

45

AGC
Sets AGC operation.
4.5.2 Remote sensing AGC (AC output mode)

46

SENS
Used to select the detection point for output voltage.
4.5.2 Remote sensing AGC (AC output mode)

ES 6000W/12000W/18000W

2-7

Lo

2.3 Rear Panels (Common to Each Model)

47

Hi Lo
Terminals used for external detection of phase L2 (V) or L3 (W) voltage.
4.5.2 Remote sensing AGC (AC output mode)48

SIGNAL INPUT
Used for the input of external signals.
4.6.1 External input (factory-installed option)

49

GAIN
6.3 Gain Adjustment

Adjusts the gain of the internal amplifier.
50

QUICK CHANGE SYNC OUTPUT
Connector from which a synchronous signal is output during a quick-change operation.
4.4.1 Quick voltage change (with the frequency unchanged)

51

BOOSTER CONTROL
Used for parallel connection using ES 2000B boosters.
Be careful not to detach the connected connector.

ES 6000W/12000W/18000W

2-8

2.4 Control Section (Common to Each Model)

2.4

Control Section (Common to Each Model)
53

52
BOOSTER OUTPUT CONTROL
L1(U)
L2(V)
L3(W)

52

54

CONTROL
DISTR UNIT
SYS SEL

BOOSTER OUTPUT CONTROL
Terminals for connections to the three-phase master and three-phase slaves, using threecontrol cables C.
Be careful not to detach the connected cables.
3.4.1 Control terminal connection diagram

53

DISTR UNIT
Terminal connected to the output switching relay inside the cabinet.
Be careful not to detach the connected cable.

54

SYS SEL
Terminal connected to the phase switching panel.
Be careful not to detach the connected cable.

ES 6000W/12000W/18000W

2-9

2.5 Rear Subpanel (ES 6000W/ES 12000W)

2.5

Rear Subpanel (ES 6000W/ES 12000W)
FEEDBACK
L1

55

L2

L3

FEED BACK L1/L2/L3
Connectors provided for expandability. Leave them unconnected.

ES 6000W/12000W/18000W

2-10

55

2.6 ES 6000W (6 kVA)

2.6

ES 6000W (6 kVA)

2.6.1

Front section
56
57

59

60
58

56

Phase switching panel
Used to switch between three-phase mode and single-phase mode.

57

Power supply panel
Provides a power switch and power lamp.

58

Intake ventOpening through which air used for cooling enters the device. Be careful not to block airfrom entering the device.

59

Controller
Can be detached for use.

60

Front cover
Do not remove the cover except when replacing the air filter.

ES 6000W/12000W/18000W

2-11

2.6 ES 6000W (6 kVA)

2.6.2

Rear section

61

63

66

64

62

65

61

Master panel
Rear signal panel with an external input terminal.
2.3.1 Rear signal panel (master)

62

Slave panel
Rear signal panel with an external input terminal.
2.3.2 Rear signal panel (slave)

63

Blank panel
Provided for expandability.

64

Exhaust ventOpening through which air is blown out. Be careful not to block air from being blown out ofthe device.

ES 6000W/12000W/18000W

2-12

2.6 ES 6000W (6 kVA)

65

Power supply input/output panel-

Power supply input
Connect this to a three-phase, 200-V distribution panel. Be sure to connect theprotective ground terminal.

-

OutputThree- and single-phase non-grounded output terminals. Use cables having a sufficientmargin for output current.

66

Rear subpanel
2.5 Rear Subpanel (ES 6000W/ES 12000W)

2.6.3

Power supply input/output panel

67
67

68

69

70

71

72

Fuse for low-power circuits
If this fuse blows, the device cannot be turned on.

68

Power supply input terminal
Connect this to a three-phase, 200-V power supply. Before connecting it, check the current
capacity of the distribution panel.
The screws of the terminal block are M6.

69

Protective ground terminal
Be sure to connect it. The screw of the terminal block is M6.

70

Three-phase output terminal
Connect this securely to a load with a cable having a sufficient margin for the current
capacity.
The screws of the terminal block are M5.

71

Frame ground terminals
Connect them as necessary.

72

Single-phase output terminal
Connect this securely to a load with a cable having a sufficient margin for the current
capacity.
The screws of the terminal block are M6.

ES 6000W/12000W/18000W

2-13

2.7 ES 12000W (12 kVA)

2.7

ES 12000W (12 kVA)

2.7.1

Front section
73
74

76

75

77

73

Phase switching panel
Used to switch between three-phase mode and single-phase mode.

74

Power supply panel
Provides a power switch and power lamp.

75

Intake ventOpening through which air used for cooling enters the device. Be careful not to block airfrom entering the device.

76

Controller
Can be detached for use.

77

Front cover
Do not remove the cover except when replacing the air filter.

ES 6000W/12000W/18000W

2-14

2.7 ES 12000W (12 kVA)

2.7.2

Rear section

78

79

80

81

83

82

78

Master panel
Rear signal panel with an external input terminal.
2.3.1 Rear signal panel (master)

79

Slave panel
Rear signal panel with an external input terminal.
2.3.2 Rear signal panel (slave)

80

Blank panel
Provided for expandability.

81

Exhaust ventOpening through which air is blown out. Be careful not to block air from being blown out ofthe device.

ES 6000W/12000W/18000W

2-15

2.7 ES 12000W (12 kVA)

82

Power supply input/output panel-

Power supply input
Connect this to a three-phase, 200-V distribution panel. Be sure to connect theprotective ground terminal.

-

OutputThree- and single-phase non-grounded output terminals. Use cables having a sufficientmargin for output current.

83

Rear subpanel
2.5 Rear Subpanel (ES 6000W/ES 12000W)

2.7.3

Power supply input/output panel

84
84

85

87

86

88

89

Fuse for low-power circuits
If this fuse blows, the device cannot be turned on.

85

Power supply input terminal
Connect this to a three-phase, 200-V power supply. Before connecting it, check the current
capacity of the distribution panel.
The screws of the terminal block are M6.

86

Protective ground terminal
Be sure to connect it. The screw of the terminal block is M6.

87

Three-phase output terminal
Connect this securely to a load with a cable having a sufficient margin for the current
capacity.
The screws of the terminal block are M5.

88

Single-phase output terminal
Connect this securely to a load with a cable having a sufficient margin for the current
capacity.
The screws of the terminal block are M10.

89

Frame ground terminals
Connect them as necessary.

ES 6000W/12000W/18000W

2-16

2.8 ES 18000W (18 kVA)

2.8

ES 18000W (18 kVA)

2.8.1

Phase L1 (U) and L2 (V) cabinet:

Front section

90
91

93

92

94

90

Phase switching panel
Used to switch between three-phase mode and single-phase mode.

91

Power supply panel
Provides a power switch and power lamp.

92

Intake ventOpening through which air used for cooling enters the device. Be careful not to block airfrom entering the device.

93

Controller
Can be detached for use.

94

Front cover
Do not remove the cover except when replacing the air filter.

ES 6000W/12000W/18000W

2-17

2.8 ES 18000W (18 kVA)

2.8.2

Phase L1 (U) and L2 (V) cabinet:
95

Rear section
96

97
101

98

99

100

95

Master panel
Rear signal panel with an external input terminal.
2.3.1 Rear signal panel (master)

96

Slave panel
Rear signal panel with an external input terminal.
2.3.2 Rear signal panel (slave)

97

Blank panel
Provided for expandability.

98

Exhaust ventOpening through which air is blown out. Be careful not to block air from being blown out ofthe device.

99

Rear subpanel
2.8.7 Rear subpanel (Phase L1 (U) and L2 (V) cabinet)

ES 6000W/12000W/18000W

2-18

2.8 ES 18000W (18 kVA)

100

Power supply input/output and relay input panel-

Power supply input
Connect this to a three-phase, 200-V distribution panel. Be sure to connect theprotective ground terminal.

-

OutputThree- and single-phase non-grounded output terminals. Use cables having a sufficientmargin for output current.

-

Relay input
Connect this terminal to output on the phase L3 (W) cabinet.

101

Switching controller panel
Controls switching between three-mode and single-phase mode.
Be careful not to detach the connected cables.

ES 6000W/12000W/18000W

2-19

2.8 ES 18000W (18 kVA)

2.8.3

Phase L3 (W) cabinet:

Front section

102

104
103

102

Power supply panel
Provides a power switch and power lamp.

103

Intake ventOpening through which air used for cooling enters the device. Be careful not to block airfrom entering the device.

104

Front cover
Do not remove the cover except when replacing the air filter.

ES 6000W/12000W/18000W

2-20

2.8 ES 18000W (18 kVA)

2.8.4

Phase L3 (W) cabinet:

Rear section
105

106

108

107

105

Slave panel
Rear signal panel with an external input terminal.
2.3.2 Rear signal panel (slave)

106

Exhaust ventOpening through which air is blown out. Be careful not to block air from being blown out ofthe device.

107

Power supply input and relay output panel-

Power supply input
Connect this to a three-phase, 200-V distribution panel. Be sure to connect theprotective ground terminal.

-

Relay output
Output of phase L3 (W). Connect this terminal to the phase L1 (U) and L2 (V) cabinet,
using the supplied output relay cable.

108

Rear subpanel
2.8.8 Rear subpanel (Phase L3 (W) cabinet)

ES 6000W/12000W/18000W

2-21

2.8 ES 18000W (18 kVA)

2.8.5

Power supply input/output and relay input panel(Phase L1 (U) and L2 (V) cabinet)

109

109

110

111

112

113

115

114

Fuse for low-power circuits
If this fuse blows, the device cannot be turned on.

110

Power supply input terminal
Connect this to a three-phase, 200-V power supply. Before connecting it, check the current
capacity of the distribution panel.
The screws of the terminal block are M6.

111

Protective ground terminal
Be sure to connect it. The screw of the terminal block is M6.

112

Relay input terminal
Connect this to the relay output terminal on the phase L3 (W) cabinet. The screws of theterminal block are M6.

113

Three-phase output terminal
Connect this securely to a load with a cable having a sufficient margin for the current
capacity.
The screws of the terminal block are M6.

114

Single-phase output terminal
Connect this securely to a load with a cable having a sufficient margin for the current
capacity.
The screws of the terminal block are M10.

115

Frame ground terminals
Connect them as necessary.

ES 6000W/12000W/18000W

2-22

2.8 ES 18000W (18 kVA)

2.8.6

Power supply input and relay output panel(Phase L3 (W) cabinet)ＬＩＮＥ ＩＮＰＵＴＯＵＴＰＵＴ

１１．４ｋＶＡ

Ｌ３

ＴＨＲＥＥ ＰＨＡＳＥ
１７０Ｖ－２２０Ｖ ５０Ｈｚ／６０Ｈｚ
２Ａ／２５０Ｖ

Ｌ１

116
116

Ｌ２

117

Ｌ３

Ｈｉ

118

Ｌｏ

119

Fuse for low-power circuits
If this fuse blows, the device cannot be turned on.

117

Power supply input terminal
Connect this to a three-phase, 200-V power supply. Before connecting it, check the current
capacity of the distribution panel.
The screws of the terminal block are M6.

118

Protective ground terminal
Be sure to connect it.

119

Relay output terminal
Connect this to the relay input terminal on the phase L1 (U) and L2 (V) cabinet.
The screws of the terminal block are M6.

2.8.7

Rear subpanel (Phase L1 (U) and L2 (V) cabinet)
FEEDBACK
L1

L2

120

120

FEED BACK L1/L2
Connectors provided for expandability. Leave them unconnected.

ES 6000W/12000W/18000W

2-23

2.8 ES 18000W (18 kVA)

2.8.8

Rear subpanel (Phase L3 (W) cabinet)
FEEDBACK
L3

121

BOOSTER OUTPUT
CONTROL

122

121

FEED BACK L3Connector provided for expandability. Leave it unconnected.

122

BOOSTER OUTPUT CONTROL
Connect this terminal to the phase L1 (U) and L2 (V) cabinet, using the supplied control
cable C.

ES 6000W/12000W/18000W

2-24

3. Grounding and Connections
3.1
3.2

3.3

3.4
3.5
3.6
3.7

ES 6000W/12000W/18000W

Installation Environment ....................................................... 3-1
Grounding and Power Connections...................................... 3-2
3.2.1 Grounding ................................................................. 3-2
3.2.2 Power supply ............................................................ 3-2
Connections to I/O Terminals ............................................... 3-3
3.3.1 Connection to the power input terminal ..................... 3-3
3.3.2 Connections to the output terminals .......................... 3-4
3.3.3 ES 18000W I/O terminal connection diagram ........... 3-5
Connecting the Control Terminals ........................................ 3-6
3.4.1 Control terminal connection diagram......................... 3-6
Fuses ................................................................................... 3-7
Checking Connections ......................................................... 3-8
Powering On and Off and Checking Operation ................... 3-10

3.1 Installation Environment

3.1

Installation Environment
For safe use of the device and to maintain reliability, take the following into consideration:

To prevent the device from toppling over, install it on a level floor that is vibration-free andcan support its weight (approximately 48 kg per unit).



Use the device within the following ambient temperature and humidity ranges:
Guaranteedperformance+5 to +35°C

5% to 80%RH
The absolute humidity range is 1 to 25 g/m3.
No condensation is allowed.

Guaranteed
operation

0 to +40°C

5% to 80%RH
The absolute humidity range is 1 to 25 g/m3.
No condensation is allowed.

Storageconditions–10 to +50°C

5% to 95%RH
The absolute humidity range is 1 to 29 g/m3.
No condensation is allowed.

In an environment with an extremely high temperature or humidity, the operation of thedevice becomes less reliable. A temperature of around 25°C and a relative humidity of 50%
are recommended for the operating environment of the device.
To get the full benefits of the forced air cooling function, install the device so that the intake
vent (in the front section) and the exhaust vent (in the rear section) are at least 50 cm apartfrom walls and other obstructions, thereby ensuring sufficient air ventilation.



Never install the device at the following locations:Outdoors
Place exposed to direct sunlight
Small area with poor ventilation
Humid place at which condensation forms easily
Dusty area
Place at which corrosive, explosive, or flammable gas is present
Place at which the device is likely to come in contact with fire or water！

CAUTION

In the event of a sudden change in the ambient temperature or humidity, such as during transport inwinter, condensation may form inside the device.
In such cases, leave the device as is until the condensation evaporates, before connecting it to a
power supply.

ES 6000W/12000W/18000W

3-1

3.2 Grounding and Power Connections

3.2

Grounding and Power Connections

3.2.1

Grounding！

WARNING

This product uses a line filter, which may cause electric shock if the product is not grounded.
) securely to
To prevent electric shock, be sure to connect the protective ground terminal (ground.

3.2.2

Power supply！

CAUTION

Before connecting the product to a power supply, make sure that the power supply voltage conforms
to the rated supply voltage of the product.
The power requirements of the product are as follows:
Voltage:Three-phase, 170 to 220 V

Frequency:

48 Hz to 62 HzFor a connection to the power supply, use the supplied power cable or an equivalent cable
whose thickness is the same or greater.

When tightening screws and pulling cables, be very careful not to allow the power cable toloosen or detach from the terminal.

ES 6000W/12000W/18000W

3-2

3.3 Connections to I/O Terminals

3.3

Connections to I/O Terminals
Before starting connection work, be sure to disconnect the power supply from the distribution panel
to prevent electric shock.

3.3.1

Connection to the power input terminal

Use the supplied power cable to connect the power input terminal (section to a three-phase 200-V power supply on the distribution panel.

LINE INPUT) on the rear

To ensure safety, be sure to disconnect the power supply from the distribution panel before cabling.

The input terminal section of the device is labeled (L1

L2

L3). Connect “” toprotective ground.
Cabling requires a Phillips screwdriver (+) used to turn the terminal block screws (M6).
Remove the safety cover of the terminal block, and remove the screws. Pass the screws through theterminal of the supplied power cable, re-insert the screws into the terminal block, and tighten thescrews securely with the screwdriver.
Be sure to perform cabling for the protective ground terminal too. After completing cabling, be sure
to mount the protective cover.
Model

Voltage range

Frequency
range

Power factor

ES 6000W(6 kVA)ES 12000W(12 kVA)

Terminalscrew

Approximately
11.4 kVA
Three-phase:
170 Vrms to
220 Vrms

48 Hz to 62 Hz

ES 18000W(18 kVA)！

Power
consumption

90% or more
(97% typ. at
rated output)

Approximately
22.8 kVA

M6

Approximately
34.2 kVAWARNINGTo ensure safety, be sure to disconnect the power supply from the distribution panel before cabling.

ES 6000W/12000W/18000W

3-3

3.3 Connections to I/O Terminals

3.3.2

Connections to the output terminals

Output is insulated from power input. All output terminals (“Hi” and “Lo” for the single-phase mode,and “L1,” “L2,” “L3,” and “N” for the three-phase mode) are insulated from the housing. Only the“Lo” and “N” terminals can be connected to the housing.
Nothing is output from the “Hi” and “Lo” single-phase output terminals during operation inthree-phase mode, and nothing is output from the “L1,” “L2,” “L3,” and “N” three-phase output
terminals during operation in single-phase mode.
The single-phase output terminal “Lo” and three-phase output terminal “N” are connected internallyat all times, so careful about short circuits and electric shock involving output from the “N” terminalin single-phase mode or the “Lo” terminal in three-phase mode.
The terminal sections differ according to the model and operation mode. Similarly, the sizes ofapplicable cables differ. With consideration of the output current, check the table below, and connecta cable with a sufficiently large sectional area. Use the proper torque for tightening.
Model
ES 6000W(6 kVA)ES 12000W(12 kVA)
ES 18000W(18 kVA)！

Output mode

Applicable cable

Single phase
Three phase
Single phase
Three phase
Single phase
Three phase

Terminal screw

22 mm

2

M6

8 mm

2

M5

38 mm

2

M10

14 mm

2

M5

60 mm

2

M10

22 mm

2

M6

CAUTION

Before connecting a cable to the power supply, check the power capacitance of the distribution panel.
Power consumption at rated output is approximately 11.4 kVA for the 6-kVA model (ES 6000W),
approximately 22.8 kVA for the 12-kVA model (ES 12000W), and approximately 34.2 kVA for the
18-kVA model (ES 18000W). For 170 V, which is the lowest power supply voltage, prepare a
distribution panel as follows: the panel for the 6-kVA model (ES 6000W) must be capable of at least
approximately 40 Arms, the one for the 12-kVA model (ES 12000W) at least approximately 80 Arms,
and the one for the 16-kVA model (ES 18000W) at least approximately 120 Arms.

！

WARNINGThe power input part of this product has an internal line filter. For this reason, if the product is
not grounded, anyone touching the housing could receive an electric shock. Before connecting
the power supply, be sure to connect the protective ground terminal.



To ensure safety, be sure to disconnect the power supply from the distribution panel before
cabling.

To ensure safety, be sure to turn off the device before connecting output.

ES 6000W/12000W/18000W

3-4

3.3 Connections to I/O Terminals

3.3.3

ES 18000W I/O terminal connection diagram

ES 6000W/12000W/18000W

3-5

3.4 Connecting the Control Terminals

3.4

Connecting the Control Terminals
Connect the phase L1 (U) and L2 (V) cabinet to the phase L3 (W) cabinet, using the supplied control
cables A/B and C.

3.4.1

Control terminal connection diagram
Control cable A (phase L3 (W))
Cable with round connectors

Control cable A (phase L2 (V))
Cable with round connectors

Control cable B (phase L2 (V))
Cable with 10-pin nylon connectors
Control cable B (phase L3 (W))
Cable with 10-pin nylon connectors

Control cable C
Cable with 6-pin nylon connectors
S cabinet

ES 6000W/12000W/18000W

L cabinet

3-6

3.5 Fuses

3.5

Fuses
The device uses normal 2 A/250 V (5.2 mm in diameter  20 mm) fusing-type fuses. These fuses
provide protection for low-power circuits. If either of the following events occurs, check for a blown
fuse:

！



The power lamp (LINE) on the power operation panel does not go on when power is
supplied to the device.

The device cannot be turned on. (The system does not operate when the power switch on the
power operation panel is turned on.)WARNINGTo ensure safety, be sure to disconnect the power supply from the distribution panel before
replacing the fuse.

Use only fuses with the specified rating.

！

CAUTION

Fuse replacement (removing the fuse holder): Push the catch in the fuse socket in the direction
indicated by the arrow (on the fuse holder). The holder becomes detached from the socket. Replace
the fuse, then push the holder into the socket until it clicks.

ES 6000W/12000W/18000W

3-7

3.6 Checking Connections

3.6

Checking Connections
Before turning on the device, verify the connections again.
(1) Connecting the power supply
See “Connection to the power input terminal,” and connect cables securely.
3.3.1 Connection to the power input terminal(2) Connecting output to a load
See “Connections to the output terminals,” and connect cables securely.
3.3.2 Connections to the output terminal！

WARNINGTo ensure safety, be sure to disconnect the power supply from the distribution panel before
cabling.

To ensure safety, be sure to disconnect the power supply from the distribution panel before
replacing a fuse.

An internal circuit of the device monitors voltage on the output terminals in the rear section andcontrols the voltage to keep it constant.
Therefore, if output current has a large peak value, or if the output frequency is high, load
regulation degrades because of the effect of impedance caused by cables to the load. Examples
of such impedance are those from cables and terminals. For this reason, avoid using a cable thatis unnecessarily long to connect the output terminal and load, fasten the terminal screws so that
there is no looseness, and use an output cable as thick as or thicker than the applicable cable.

！

CAUTION

Select cables properly by referring to the following, which shows the relationship between cables andallowable current:

ES 6000W/12000W/18000W

3-8

3.6 Checking Connections

Allowable current of 2-conductor vinyl cabtire cables (JIS C 3312 VCT cables)
Ambient temperature of 30C or less
Allowable
Nominal
Number ofcurrent
cross-sectional area
conductors
(A)
(mm2)
2
22
3.5
32
5.5
42
8
51
Two
conductors
14
71
22
95
38
130
60
170
Single60
225
conductor

Ambient
temperature (C)

Allowable current
derating factor

30
35
40
45
50

1.00
0.91
0.82
0.71
0.58
(As per JEAC 8001-1986)* Multiply the allowable current in theleft table by the derating factor in theabove table.

Relationship between cable length and voltage drop (JIS C 3307 IV cables)

Cable length (m)Ambient temperature exceeding 30C

Current (Arms)

ES 6000W/12000W/18000W

3-9*

Cable length showing a voltage dropof 0.5 V caused by electric wire
resistance*indicates a
In the graph,conductor cross-sectional area.

3.7 Powering On and Off and Checking Operation

3.7

Powering On and Off and Checking Operation
After cables are connected, check operation. Power on by following the procedure below.
(1) When External Input Option is installed, confirm that the SIGNAL INPUT switch on the rear
panel is set to INT.

(2) Verify that the cables are connected correctly according to the instructions given in theprevious sections.
(3) Turn on power. The LINE lamp goes on.
LINE(4) Check the setting of the SYSTEM switch. The operation mode is determined according to thesetting at the power-on time. After power-on, changing the switch setting does not change theoperation mode.
SYSTEM
SINGLE

PHASE

THREE

1 φ

PHASE

3 φ

(In this figure, three-phase mode is set).

(5) Turn on the power switch. The system is turned on, and operation starts.
This is indicated on the controller.

POWER
OFF
ON

POWER
OFF

ON

(6) Immediately after the power-on sequence, the settings stored at memory address 1 are used.
When the device is turned on for the first time after its purchase, preset defaults are used.
4.3.3 Memory
Each output terminal is dedicated for three-phase or single-phase mode. Nothing is output
from the single-phase output terminals in three-phase mode, and nothing is output from thethree-phase output terminals in single-phase mode.

ES 6000W/12000W/18000W

3-10

3.7 Powering On and Off and Checking Operation(7) To turn off the system, press the “OFF” switch.
The supply of power is stopped, and the device is turned off.
POWER
OFF
ON

POWER
OFF
ON

(8) Before powering on again, wait about 10 seconds after operation stops.

！

CAUTION

Connect cables securely. An improper connection may result in a malfunction.

Immediately after the power-on sequence, thecircuit operation stabilizes.

ES 6000W/12000W/18000W

OVERLOAD

3-11

lamp may go and remain on until internal

4. Operations
4.1
4.2

4.3

4.4

4.5

4.6
4.7

ES 6000W/12000W/18000W

Notational Conventions ........................................................ 4-1
Basic Operations .................................................................. 4-2
4.2.1 Switching between three-phase mode andsingle-phase mode.................................................... 4-2
4.2.2 Detaching and attaching the controller ...................... 4-3
4.2.3 Setting the output voltage and output voltage
range ........................................................................ 4-3
4.2.4 Setting the output frequency ..................................... 4-5
4.2.5 Turning output on and off .......................................... 4-6
4.2.6 Key lock .................................................................... 4-6
4.2.7 Switching between DC and AC output modes ........... 4-6
4.2.8 Measurement function .............................................. 4-7
4.2.9 Protection function .................................................... 4-9
Advanced Operations.......................................................... 4-10
4.3.1 Setting limit values ................................................... 4-10
4.3.2 Line synchronization ................................................ 4-11
4.3.3 Memory .................................................................... 4-12
4.3.4 Memory storage and initial settings .......................... 4-16
Low-frequency Immunity Tests ............................................ 4-18
4.4.1 Quick voltage change(with the frequency unchanged) ............................... 4-19
4.4.2 Voltage variation (with a frequency variation) ........... 4-22
Obtaining Precise Output .................................................... 4-24
4.5.1 Precision and high stability (setting of thecompensation mode) ............................................... 4-24
4.5.2 Remote sensing AGC (AC output mode) .................. 4-25
4.5.3 Auto calibration(output voltage calibration function) ......................... 4-28
Using External Signals ........................................................ 4-30
4.6.1 External input (factory-installed option) .................... 4-30
Introduction of Other Products of the Same Family,
Peripherals, and Options..................................................... 4-33
4.7.1 ES 4473 interface board .......................................... 4-33
4.7.2 ES 4474 remote terminal ......................................... 4-33
4.7.3 ES 0406 low-frequency immunity test program ........ 4-34

4.1 Notational Conventions

4.1

Notational Conventions
This section explains the notations used to explain device operations.
(1) Notations of indications
VOLT

100V

VOLT

200V

A lamp is off.

A lamp is on.
A lamp or indicator is blinking. The arrow indicates
which digit on the display is blinking.

VOLT(2) Notations of operations
This indicates the pressing of a key.

VOLT

You need not hold down the key.

DOWN

MODIFYUP

This indicates the turning of a dial.
The figure shows that the dial is turned clockwise.

！

CAUTION

To better understand the methods of use, operate the device as you read this section.

ES 6000W/12000W/18000W

4-1

4.2 Basic Operations

4.2

Basic Operations

4.2.1

Switching between three-phase mode and single-phasemode

The operation mode is determined according to the setting of the phase switch at power-on time.
Before turning on the device, set the switch.
To change the operation mode, turn off the system, set the phase switch, and turn on the systemagain.


Operating procedure
Before turning on the device, set the SYSTEM switch to the position for the desired
operation mode.
After setting the switch, turn on the power switch. An indication is displayed on thecontroller, and at the same time, the relevant operation mode lamp goes on to indicate theoperation status. (In the figure below, three-phase mode is set.)
SYSTEM
SINGLE

PHASE

THREE

1 φ

PHASE

3 φ

To change the operation mode, turn off the power switch, set the phase switch, and turn on
the power switch.

！

CAUTION

Each output terminal is dedicated for three-phase or single-phase mode. Nothing is output fromthe single-phase output terminals in three-phase mode, and nothing is output from thethree-phase output terminals in single-phase mode.

After power-on, changing the switch setting does not change the operation mode.

To change the operation mode, turn off the power switch, set the phase switch, and turn on the
power switch.

ES 6000W/12000W/18000W

4-2

4.2 Basic Operations

4.2.2

Detaching and attaching the controller

You can detach the controller from the main unit and then use it. Choose the desired mode of use
according to your purposes.
To detach the controller, first pull the bottom of the controller. Then, raise the bottom edge, and pullout the controller from the socket located behind it to separate the controller from the main unit. Twoother sockets are provided so that you can mount and fasten the controller while it faces slightly
upward.

(1) Pull the bottom of thecontroller to detach it fromthe retaining magnets.
(2) When the controller isdetached from the retaining
magnets, raise the bottomedge to detach the controller
from the main unit.

(2)

(2)
(1)

(1) Place the controller inthe rear socket, andposition it so that it
faces slightly upward.
(2) Insert the controller
into the other sockets,and fasten it in place.

(1)

Mounting sockets(one each on
right and left)

Figure 4-1

Detaching the controller！

Figure 4-2

Fastening the controller while
it faces upward

CAUTION

To prevent the cable from breaking, do not pull the cable with excessive force.

When detaching or attaching the controller, be careful not to drop it.

Attach the controller securely, and be careful not to drop the controller during transport.

4.2.3

Setting the output voltage and output voltage range

After setting an appropriate output voltage range for a target output voltage, place the device
in the voltage setting state, and set the voltage by turning the modify dial.

The upper limit of output voltage depends on the output voltage range setting and limit
setting.



The voltage setting steps of the dial depend on whether the mode is setting mode orandmeasurement mode. In setting mode, you can change the step by pressing thekeys, but in measurement mode, the step is always set to 0.1 V.

ES 6000W/12000W/18000W

4-3

4.2 Basic Operations



Operating procedure
100V/
200V

Press thekey to set the output voltage range to the desired range. Each time the key

is pressed, the range setting toggles between the two ranges. During the switching operation,
BUSY remains on.
OUTPUT RANGE
100V/
200V

OUTPUT RANGE
BUSY

100V

100V/
200V

200V

Press the

VOLT

100V
200V

Outputmode
AC output
DC output

Setting range
100-V range 200-V range
0 to 150.0V
0 to 300.0V
0 to 203.0V
0 to 406.0V

key to place the device in the voltage setting state. The lamp goes on.

－ENTRY－－ENTRY－

VOLT

VOLT

FREQ

FREQ

Turn the modify dial to set a voltage. The output voltage value changes together with thedisplayed value.
In setting mode, the value indicated by the blinking digit changes; in measurement mode, thevalue indicated by the 0.1-V digit changes.
VOLTAGE

Peak
rms

DOWN

MODIFYUPVOLTAGE

Peak
rms

Ｖ

To end this setting operation, press the

ENTER

Ｖ

key. The lamp goes out, and the voltage

setting state ends.
ENTER

！

VOLT

ENTER

CAUTION

The maximum output current depends on the output voltage range. Select an appropriate range
according to the load current.

In three-phase mode, this setting is possible only for phase voltage.
line-to-line voltage.

ES 6000W/12000W/18000W

4-4

It is not possible for4.2 Basic Operations

4.2.4

Setting the output frequency

Place the device in the frequency setting state, and set the frequency by turning the modify
dial.



The maximum frequency range is 5 to 1100 Hz, but if limit values are set(
4.3.1 Setting limit values), the upper and lower limits are determined according tothose settings.

Operating procedure
SET/

Press the MEAS

key to set the display mode to setting mode. SETDISPLAY MODE
SET/
MEAS

goes on.

DISPLAY MODE

SET

SET/
MEAS

MEAS

SET
MEAS

key to place the device in the frequency setting state. Its lamp goes on.

Press the FREQ－ENTRY－－ENTRY－

VOLT

VOLT

FREQ

FREQ

Turning the modify dial changes the value indicated by the blinking digit. The cursororkey is pressed. The
indicated by the blinking digit is moved when the
output frequency changes together with the displayed value.
MODIFYFREQUENCY/TIME/POWER

PF

kVA

kW

ms

s

FREQUENCY/TIME/POWER

UP

DOWN

Hz

PF

To end this setting operation, press the

ENTER

kVA

kW

ms

s

key. The lamp goes out, and the voltage

setting state ends.
ENTER

！

FREQ

ENTER

CAUTION

When setting a frequency, be sure to note the allowable frequency range of the connected load.

When line synchronization is set to on, the frequency cannot be set. Before attempting to set thefrequency, turn off line synchronization.
4.3.2 Line synchronization

ES 6000W/12000W/18000W

4-5

Hz

4.2 Basic Operations

4.2.5

Turning output on and off

Output can be turned on and off.
Operating procedure
Press theoff.

OFF/ON

key. Each time the key is pressed, output is alternately turned on and

OUTPUT
OFF

4.2.6

ON

OUTPUT
OFF

OFF/ONON

OFF/ONKey lock

When the key lock switch is slid to the top position, the switch knob is activated and the key lockstate is entered. In this state, key input from the front panel is not accepted.
KEY
LOCK Key lock off

KEY
LOCK Key lock on(Operation enabled)

4.2.7(Operation disabled)

Switching between DC and AC output modes

The three-phase system can operate only in AC output mode. You cannot switch to DC output mode.
To toggle between DC and AC output modes, press the AC/DC key on the control panel.
When AC output mode is set,DCgoes out.

Operating procedure
Each time the AC/DC key is pressed, DC output mode or AC output mode is alternately set.
When the associated lamp is on, it indicates the DC output mode, and when off, it indicates
the AC output mode.
(Off)

(On)

DC

DC

AC/DC

AC/DC

AC output mode

DC output mode

ES 6000W/12000W/18000W

4-6

4.2 Basic Operations
In DC output mode, “dc” is displayed for the frequency indication; in AC output mode, theset frequency is displayed.
FREQUENCY/TIME/POWER

PF

kVA

kW

FREQUENCY/TIME/POWER

ms

s

Hz

PF

kVA

kW

ms

s

Hz

When the output voltage is set to 0 V in DC output mode, adjust the offset voltage by using
OFFSET on the rear panel.
2.3 Rear Panels (Common to Each Model)！

CAUTION

Neither DC output in AC output mode nor AC output in DC output mode is possible.



Switching from DC output mode to AC output mode is not possible unless the voltage is 150 V
or less for the 100-V range or 300 V or less for the 200-V range.

When the device is placed in the line synchronization state in AC output mode, switching to DC
output mode is not possible. In DC output mode, the line synchronization state cannot beentered.



Toggling between DC and AC output modes is not possible under any of the following
conditions:-

CF ON state(Control is possible from an external computer and when the ES 4474 remote terminal isused.)-QC ENABLE state-

When output is on-

During a sweep operation-

During a QC operation-

During a range change operation

4.2.8

Measurement functionThe effective values and peak values of voltage and current, active power, apparent power,
and the power factor can be measured.



Output voltage can be changed while the measurement display mode is maintained.



4.2.3 Setting the output voltage and output voltage range
Operating procedure
SET/

Press the MEASDISPLAY MODE
SET/
MEAS

SET
MEAS

ES 6000W/12000W/18000W

key to set the display mode to measurement mode. MEAS goes on.
DISPLAY MODE
SET/
MEAS

SET
MEAS

4-7

4.2 Basic Operations<<Displaying the effective values and peak values of voltage and current>>
Press the

Peak/
rms

key. When the lamp is on, a peak value is displayed; when off, aneffective value is displayed.
Peak/
rms

Peak
rms

Indicates effective
values are displayed

Peak
rms

Indicates peakvalues are displayed<<Displaying active power, apparent power, and the power factor>>
F/W/

Press the VA/PF

key. Each time the key is pressed, the value of a different

measurement is displayed. The display sequence is as follows: frequency (Hz) →active power (kW) → apparent power (kVA) → power factor → frequency (Hz)
→ .…
Hz

F/W/
VA/PF

kW

Hz

F/W/
VA/PF

…

F/W/
VA/PF

kVA

F/W/
VA/PF

F/W/
VA/PF

PF

FREQUENCY/TIME/POWER

PF

kVA

kW

ms

s

Hz

<<Selecting the measurement phase>>
Press the

L1/
L2/L3

key. Each time the key is pressed, the selected measurement phase ischanged. The sequence of the change is as follows:

Phase voltage L3
Phase current L3
Phase L3 power

L1

L2

L3

Line-to-line voltage
L1-L2
Phase current L1
Total power for threephases

L1

L2

L3

Phase voltage L1
Phase current L1
Phase L1 power

Phase voltage L2
Phase current L2
Phase L2 power

L1

L1

L2

L3

L3

Line-to-line voltage
L2-L3
Phase current L2
Total power for threephasesLine-to-line voltage
L3-L1
Phase current L3
Total power for threephasesPhase voltage L1
Phase current L1
Phase L1 power

L1

L1

L1

L2

L3

L2

L3

The indicated L1, L2, and L3 phases correspond to U, V, and W, respectively.

ES 6000W/12000W/18000W

L2

4-8

L2

L3

…

4.2 Basic Operations！

CAUTION

Measured frequency values are not displayed. (Only the setting is displayed.)Operations with the

Peak/
rms

and

F/W/
VA/PF

keys cannot be accepted while the display mode is set

to setting mode ( SET is on). When either of these keys is pressed, it may take several seconds
until stable values are displayed.


L1/
L2/L3

4.2.9

is valid only in three-phase mode. It cannot be used in single-phase mode.

Protection function

The device provides the protection function explained below.
OVER-

When output is restricted, the overload state is entered, and LOAD

Protection
factorgoes on.

Protection status
Outputrestriction

Power
disconnection

Outline of operation

Outputovercurrent

Yes

Yes

At the same time that the peak value ofcurrent is detected and restricted, the meanvalue is detected and restricted by a decreasein the input voltage.

Output element
loss

Yes

Yes

If semiconductor loss in the output stage
exceeds a specified value, it is restricted by adecrease in the input voltage.

Output elementin safeoperation area

Yes

Yes

If the safe operation area of a semiconductorin the output stage exceeds a specified value,
output voltage and current are restricted.

Heat in internal
elements

No

Yes

A protective operation takes place when theambient environment or a fan failure causes a
detected decline in cooling capability.

！

CAUTION

In a protective operation for restricting output, the device is placed in the overload protection state,
and OVERgoes on. When the cause of the restriction (e.g., overload or short-circuit) is corrected,
LOAD
self-restoration to the normal state is performed, but depending on the degree or time of theprotection state, power is sometimes turned off.
Primarily during remote sensing AGC (4.5.2 Remote sensing AGC (AC output mode)), if
the external sensing terminal becomes available with output left on or if output exceeds the voltage
compensation range, the protection function turns off the compensation operation and turns on
OVERLOAD . This state continues until output is turned off.
Also, the lamp may go on for a short time when the voltage range is changed.

ES 6000W/12000W/18000W

4-9

4.3 Advanced Operations

4.3

Advanced Operations

4.3.1

Setting limit values

By setting limit values set, the setting ranges of output voltage and output frequency can be
restricted. If you set appropriate limit values for the allowable input range of the connectedload in advance, you can prevent load failures, such as those resulting from applying
overvoltage.



Three types of limits can be set:frequency limit.

The setting of the quick-change voltage is restricted by the set limit values.

upper voltage limit, upper frequency limit, and lower

4.4.1 Quick voltage change (with the frequency unchanged)
Operating procedure
Press the

SET/
MEAS

key to set the display mode to setting mode.

4.2.8 Measurement function
Pressing the SEL key displays the three limit values that are currently set.
In the value displayed, one digit is indicated by the cursor. Each time the SEL key ispressed, the cursor moves to the next value displayed. The display sequence is as follows:
upper voltage limit (V) → upper frequency limit (Hz) → lower frequency limit (Hz) →upper voltage limit (V) → .… Move the cursor to the limit setting you want to set.
－LIMIT－SELUPR LWR－LIMIT－SEL

VOLTAGEUPR LWR

Peak
rms－LIMIT－SELＶFREQUENCY/TIME/POWER

UPR LWRPF－LIMIT－
SEL

kW

ms

s

Hz

ms

s

Hz

FREQUENCY/TIME/POWER

UPR LWRPF

ES 6000W/12000W/18000W

kVA

4-10

kVA

kW

4.3 Advanced Operations
Specify a limit value by turning the modify dial. You can move the cursor by pressing the
and
keys.
VOLTAGE

Peak
rms

DOWN

VOLTAGE

Peak
rms

Ｖ

After specifying a value, press theto the SEL

MODIFY
UP

ENTER

Ｖ

key. The basic display state that was set prior

key being pressed is restored, and the setting operation ends.

To check the set value, press the SEL key again to enter the setting state.
To specify a value for another limit setting, repeat the procedure from the beginning.

CAUTION！

A value less than the currently set values of output voltage and quick-change voltage cannot be set as
the voltage limit value.
Similarly, values exceeding the currently set frequency range cannot be set as the upper and lower
frequency limit values.

4.3.2

Line synchronization

This function synchronizes the output frequency with the frequency of the AC current line.
Synchronization is possible with power line frequencies ranging from 48 to 62 Hz.
Operating procedure
Turn off output. When output is on, line synchronization cannot be turned on or off.
OUTPUT
OFF/ON

Press

LINE
SYNC

OFF

ON

OFF/ON. After waiting for stabilization (approximately 100 ms), the frequency display

changes to “LInE”, and output is synchronized.
FREQUENCY/TIME/POWER
LINE
SYNC

LINE
SYNC

PF

ES 6000W/12000W/18000W

4-11

kVA

kW

ms

s

Hz

4.3 Advanced Operations

To turn off line synchronization, turn off output, then press the

LINE
SYNC

key.

While line synchronization is turned off, the output frequency is always set to 55 Hz.
OUTPUTOFF

ON

FREQUENCY/TIME/POWER

OFF/ON

LINE
SYNC

！

PF

kVA

kW

ms

s

Hz

CAUTION

The frequency range that can be used for line synchronization is from 48 to 62 Hz, which is the sameas the rated frequency range of the device. Use frequencies within this range.
When output is on, line synchronization cannot be turned on or off. Before setting a value, turn off
output.
While line synchronization is turned off, the output frequency is always set to 55 Hz.
If the allowable frequency setting range determined by set frequency limit values
4.3.1 Setting limit values) does not include 55 Hz, line synchronization cannot be turned on.
(

4.3.3

Memory

Setting values and states can be stored in backup memory supported by an internal battery, sothey can later be recalled from memory.



There are 121 memory addresses, from 0 to 120. Initial values are stored at address 0 and can
only be recalled from memory. Any state can be stored at the remaining 120 addresses.



During the power-on sequence, the contents of address 1 are set. If you store a frequently
used state at address 1, you do not need to specify settings each time you use the device.



Using the state settings stored in memory enables the quick output change operation thatchanges output quickly between the states before and after a recall operation. Furthermore,setting a transition time (4.4.2 Voltage variation (with a frequency variation))enables a sweep operation that changes the voltage or frequency of output for the set time,
between the states before and after the recall operation. For details, see “Low-frequency
immunity test.”
4.4 Low-frequency Immunity Test

ES 6000W/12000W/18000W

4-12

4.3 Advanced Operations
In the settings stored at address 1 to 120, settings for three- or single-phase mode can be mixed.
For example, you can store settings for three-phase mode at address 2 and settings for single-phasemode at address 3. When you press the RCL key and select any of the addresses, MEASURE
L1 , L2 , and L3 go on if settings for three-phase mode are stored at that address, orgoes on if settings for single-phase mode are stored there.

If you select a memory address where no data is stored,

L1 ,

L2 , and

L3

L1

do not go on.

You cannot recall contents from any memory address where phase mode settings are stored that are
not for an operating phase mode.
You can store settings for single-phase mode, for three-phase mode, and for external input mode
(option) at address 1.

Table 4-1
Address01
1
2:

Description
Initial value
Setting values to be set during power-on insingle-phase mode
Setting values to be set during power-on inthree-phase mode
Memory address for settings common to the three- andsingle-phase modes
Three-phase mode:

120

Table 4-2

Setting memory configuration

L1 ,L2 , and

L3

on.
Single-phase mode:

L1

goes on.

Setting memory configuration in external input mode

Address

Description

0

Initial value

1

Setting values to be set during power-on

ES 6000W/12000W/18000W

4-13

go

4.3 Advanced Operations！

①

CAUTION

In a memory recall operation with output turned on, the device operates as follows so as not to
mistakenly supply output to the load:With “output off” set as the state to be entered after the memory recall
After the memory recall, “output off” is always set.

With “output on” set as the state to be entered after the memory recall
If any of the state settings listed below has a different value before the memory recall thanthat after the memory recall, “output off” is set to ensure reliable operation.
If the state settings remain the same, however, output remains on.
-

Line synchronization on/off-

Quick-change enable mode-

Output voltage range 100 V/200 V-

Precision/high stability-

Output mode AC/DC-

Crest factor function enabled/disabled (If is enabled, the CF value must be the same
before and after the memory recall.)②

Although the contents of address 1 are recalled during the power-on sequence, output is always
turned off regardless of the stored contents so as not to mistakenly supply output to the load.

③

When a sweep is not to be used, check whether the transition time would be set to 0 at the timeof the save operation to make sure that the sweep operation is not performed by mistake.
4.4.2 Voltage variation (with a frequency variation)④

The interface-related settings used when the optional ES 4473 interface board is installed are notstored in memory and cannot be recalled from memory. For details, see the ES 4473 Interface
Board Instruction Manual.

⑤

When the optional ES 4474 remote terminal is used, additional states can be stored in andrecalled from memory. For details, see the ES 4474 Remote Terminal Instruction Manual.

⑥

When the output sweep operation is not to be used, set the transition time to 0.
4.4.2 Voltage variation (with a frequency variation)

Operating procedure:

Memory storage

Press the STO key. The lamp blinks, a memory address is displayed, and the device enters
the setting state.
－MEMORY－STO

RCL

CURRENT/PHASE/MEM ADRS

STO
Peak
rms

ES 6000W/12000W/18000W

4-14

deg

A

4.3 Advanced Operations
Select a memory address by turning the modify dial. Address 0 is used only for memory
recall, so it cannot be set for the save operation.
CURRENT/PHASE/MEM ADRS

Peak
rms

deg

DOWN

MODIFYUP

CURRENT/PHASE/MEM ADRS

Peak
rms

A

deg

A

After selecting the desired address for the save operation, press the ENTER key.
The states at this point in time are saved, the lamp goes out, and the setting state ends.

STO

ENTER



Operating procedure:

ENTER

Memory recall

Press the RCL key. The lamp goes on, a memory address is displayed, and the device
enters the setting state. The output voltage or frequency value stored at that address is thendisplayed, which can help you select the address whose contents are to be recalled.
－MEMORY－STO

VOLTAGERCL

CURRENT/PHASE/MEM ADRS

RCL
Peak
rms

Peak
rms

Ｖ

deg

A

Select a memory address by turning the modify dial.
CURRENT/PHASE/MEM ADRS

Peak
rms

deg

DOWN

MODIFYUP

CURRENT/PHASE/MEM ADRS

Peak
rms

A

deg

A

After selecting the address whose contents you want to recall, press the ENTER key. The
lamp goes out, the memory contents are recalled, a state change occurs, and the setting state
ends.
ENTER

ES 6000W/12000W/18000W

RCL

ENTER

4-15

4.3 Advanced Operations

4.3.4

Memory storage and initial settings
Table 4-3

Memory storage and initial settings

Setting
Output mode
Output voltage
Output voltage range
Output frequency
Output on/off
Key lock
Measurement function
Upper voltage limit
Limit values
Upper frequency limit
Lower frequency limit
Line synchronization
Quick-change enable mode
Quick voltage
QC level A
change(frequency
QC start phaseunchanged)
QC timeVoltage variation (with a frequency variation)
Transition time
Precision/high-stability mode
Remote sensing AGC
Auto calibration (start)
External input

Memory storage
enabled
Yes
Yes
Yes
Yes
(*1)

Initial setting(recalled from address 0)AC
0.0 V
100-V range
50.00 Hz
Off
No

Yes
Yes
Yes

(*2)

300.0 V
1100.00 Hz
5.00 Hz
Off
Canceled
0.0 V
0 deg.
0.1 ms

Yes

0.0ｓ

Yes

Precision mode
No

(*2)

*1: Output is always turned off during the power-on sequence even if the state of output on isstored at memory address 1. In the case of a recall operation that causes a voltage variation(with a frequency variation), if the settings listed below are different before and after the
memory recall, output is turned off even if the state of output on is stored in memory.
The values of the following settings before a memory recall must be the same after the
memory recall:
4.2.7 Switching between DC and AC output modes-

Output mode AC/DC-

Crest factor function enabled/disabled (If the function is enabled, the CF value
must be the same before and after the memory recall.)）-Line synchronization on/off-

Output voltage range 100 V/200 V
4.2.3 Setting the output voltage and output voltage range-

Precision/high stability
4.5.1 Precision and high stability (setting of the compensation mode)

4.3.2 Line synchronization

Before and after a memory recall, the quick-change enable mode must not be set.
4.4.1 Quick voltage change (with the frequency unchanged)*2: These setting states are not subject to the memory store and recall operations.
Switches must be used to specify the settings necessary.

ES 6000W/12000W/18000W

4-16

4.3 Advanced Operations！

CAUTION

If settings for a function available only with an option (ES 4474 remote terminal or ES 4473
interface board) are stored in memory, an unpredictable operation may occur during a recall
operation or quick-change operation with the option removed. This is because the contents ofmemory have been left unchanged.
Before using an option such as the remote terminal after it has been used and removed, restoring
the initial state by recalling the contents of address 0 is recommended.

When the settings are initialized by recalling the contents of address 0, the settings of functions
available only with options (ES 4474 remote terminal and ES 4473 interface board) are
initialized as well as the settings listed on the previous page (Table 4-3 Memory storage andinitial settings).
Note that the GPIB address and other settings required for use of the ES 4473 interface board are
initialized at the same time.
Before using these options, read the ES 4474 Remote Terminal/ES 4473 Interface Board
Instruction Manual thoroughly.

ES 6000W/12000W/18000W

4-17

4.4 Low-frequency Immunity Tests

4.4

Low-frequency Immunity Tests
Low-frequency immunity tests check the robustness (immunity) of the tested unit against a variety ofabnormal phenomena that occur on power lines, by generating these phenomena quantitatively.
The tests are also called power supply environment tests for which different rules are defined in theinternational IEC Standards.
Recently, demand for higher robustness against external abnormalities and noise is increasing, notonly in order to comply with regulations on noise generated from equipment, which include radiationnoise regulations (FCC, VDE, and VCCI) and harmonics regulations (IEC61000-3-2) but also to
improve equipment reliability and safety. Low-frequency immunity tests have become indispensablein efforts to meet this demand.
The device can generate the following abnormal power supply phenomena:
Phenomenon

Description

Quick voltage change(with the frequency unchanged)

Power supply is momentarily interrupted or its voltage decreases
or increases momentarily before the original voltage is restored
within a certain period.
The frequency does not change.

Voltage variation(with a frequency variation)！

The power supply voltage and frequency change momentarily or
within a certain period.
(Either the voltage and frequency change at the same time or only
one of them changes.)

CAUTION

A momentary change in the power supply status is called a “quick change” (QC), such as a quick
voltage change and quick frequency change. In contrast, a change made within a certain period
is called a “sweep,” such as a voltage sweep and frequency sweep.
The device employs a linear sweep in which values change linearly over time.
The ES 4474 remote terminal and ES 0406E IEC testing software are provided as options for thedevice, and they enable simulation of a variety of abnormal power supply phenomena in addition
to the phenomena described above.
4.7.3 ES 0406E IEC testing softwareA quick change and a sweep are performed for three phases at the same time. You cannot set
parameters for each phase.

ES 6000W/12000W/18000W

4-18

4.4 Low-frequency Immunity Tests

4.4.1

Quick voltage change (with the frequency unchanged)The output voltage quick-change function cuts off power, decreases the voltage, or increases
the voltage momentarily, and within a certain period, it restores the voltage state set prior tothis quick change. You can set only phase L1 (U) as the quick-change start phase. Phases L2(V) and L3 (W) change at the same time as phase L1 (U) changesBefore testing, set a quick-change voltage, quick-change phase, and quick-change time.
After setting them, set the quick-change enable mode, and start the test by pressing thequick-change start key. The following figure shows the output observed during such a test:

Output(phase U)
Synchronous signal output(QC SYNC OUT)
+5V
0V



Operating procedure:
Press theENBL

Parameter setting and preparations

key to turn off the lamp and cancel the quick-change enable mode so thatquick-change parameters can be set. Each time theENBL

key is pressed, the mode isalternately set or canceled.
－ QUICK CHANGE－－ QUICK CHANGE－

START

START

ENBL

SEL

ENBL

SEL

Pressing the SEL key displays the currently set values for three parameters:
quick-change voltage, quick-change time, and quick-change phase.
In the value displayed, one digit is indicated by the cursor. Each time the SEL key ispressed, the cursor moves to the next parameter in the following sequence: quick-change
voltage (V) → quick-change phase (deg.) → quick-change time (ms) → quick-change
voltage → .… Move the cursor to the parameter you want to set.

ES 6000W/12000W/18000W

4-19

4.4 Low-frequency Immunity Tests－ QUICK CHANGE－－ QUICK CHANGE－

START

START

ENBL

SEL

ENBL

VOLTAGE

SEL
Peak
rms

－ QUICK CHANGE－

START

ENBL

Ｖ

CURRENT/PHASE/MEM ADRS

SEL
Peak
rms

－ QUICK CHANGE－

START

ENBL

deg

A

FREQUENCY/TIME/POWER

SEL
PF

kVA

kW

ms

s

Hz

Specify a parameter value by turning the modify dial. You can move the cursor by pressing
the

and

keys.

VOLTAGE
DOWN
Peak
rms

MODIFY
UP

Peak
rms

Ｖ

After setting the parameter, press the ENTER
SEL

VOLTAGE

Ｖ

key. The basic display state prior to the

key being pressed is restored, and the setting operation ends.

To confirm a set value or to set another parameter value, press the SEL
the setting state.
ENTER

ES 6000W/12000W/18000W

SEL

ENTER

4-20

key again to enter4.4 Low-frequency Immunity Tests

Operating procedure:

Performing the test

After setting parameter values, press the

ENBL

key to set the quick-change enable mode.

The lamp goes on, and the device is ready for the quick-change operation.
－ QUICK CHANGE－－ QUICK CHANGE－

START

START

ENBL

SEL

ENBL

SEL

Press the START key. The output changes quickly according to the set parameter values.
During the operation, the lamp is on, and after the operation ends, the lamp goes out.
A synchronous signal is output from the QC SYNC OUT terminal at the rear, and it can beused as the trigger signal for the oscilloscope used for observation.
－ QUICK CHANGE－

START

ENBL

SEL

－ QUICK CHANGE－

START

START

ENBL

SEL

(Quick change in progress)

To forcibly stop the quick-change operation in progress and restore the original state, press
the ENBL key. The original output voltage is restored, and the quick-change enable modeis forcibly canceled.
Even during the operation, output can be turned off by pressing the－ QUICK CHANGE－－ QUICK CHANGE－

START

START

ENBL

SEL

(Quick change in progress)

ES 6000W/12000W/18000W

ENBL

OFF/ON

SEL(Restores voltage to its value measured
prior to start of quick change)

4-21

key.

4.4 Low-frequency Immunity Tests

4.4.2

Voltage variation (with a frequency variation)



The memory function and the transition time setting are used to perform a sweep operation inwhich the output voltage or frequency changes linearly within the set time. If the transition
time is set to 0, a quick-change operation can also be performed.
4.3.3 MemoryVoltage and frequency can be changed independently and at the same time. The following
figure shows an example of output during such an operation.

！

CAUTION

Unlike a quick voltage change (with the frequency unchanged), this operation can change thefrequency but cannot cause a restoration (restoring the value set prior to the quick change).

More complicated sweep operations (for voltage only) are possible if the optional ES 4474
remote terminal is used, or an external computer connected via the ES 4473 interface board isused for control.



Operating procedure:

Parameter setting and preparations

Set the output voltage and frequency to the states to be used following a change, and savethese states at any memory address.
See the explanation on how to set values in the memory storage operation.
4.3.3 Memory

TRST
TIME

Press thekey. The lamp goes on, the set transition time is displayed, and the device

enters the setting state.
TRST
TIME

TRST
TIME

Set the transition time by turning the modify dial. To perform a quick change, set 0. To
perform a sweep, set the desired sweep time.
FREQUENCY/TIME/POWER

DOWN

PF

kVA

kW

ES 6000W/12000W/18000W

mss

MODIFYUPHzFREQUENCY/TIME/POWER

PF

4-22

kVA

kW

ms

s

Hz

4.4 Low-frequency Immunity Tests

After setting the transition time, press thestate ends.
TRST
TIME

ENTER



Operating procedure:

ENTER

key. The lamp goes out, and the setting

ENTER

Performing the test

Set the output voltage and frequency to their values set prior to the change, then recall thecontents of the address used for the previous memory storage operation.
At the same time as the recall operation, the output starts to change. See the description of
the memory recall method.
4.3.3 Memory
ENTER

RCL

RCL

ENTER

(During transition)！

CAUTION

During a memory recall, the states before and after the memory recall are compared with each other.
Then, if the conditions listed below are not met, a quick change takes place instead of a sweep. To
enable this operation, settings must be specified so that the following conditions are satisfied:
Conditions for a sweepThe following settings must be the same before and after a memory recall:
4.3.2 Line synchronization-

Line synchronization on/off-

Output voltage range 100 V/200 V
4.2.3 Setting the output voltage and output voltage range-

Output mode AC/DC-

Crest factor function enabled/disabled (if the function is enabled, the CF value must be thesame before and after the memory recall.)-Precision/high stability
4.5.1 Precision and high stability (setting of the compensation mode)

Before and after a memory recall, the quick-change enable mode must not be set.
4.4.1 Quick voltage change (with the frequency unchanged)

A quick change and a sweep are performed for three phases at the same time.
A common quick-change phase voltage is set for the phases. You cannot set a line-to-line voltage.
A quick-change phase is set for phase L1 (U). Phases L2 (V) and L3 (W) change at the same time asphase L1 (U) changes.
You cannot set parameters for each phase separately.

ES 6000W/12000W/18000W

4-23

4.5 Obtaining Precise Output

4.5

Obtaining Precise Output

4.5.1

Precision and high stability (setting of the compensation
mode)



This function switches between the high and low levels of compensation sensitivity to keep
output voltage at a constant level without regard to load current and its variations.



If high sensitivity (precision mode) is set, the high-precision state can be entered in which
variations in output voltage resulted from variations in load current are suppressed. Though apeak current as high as 3.5 times the rated current can be output in this mode, operation to acapacitive load with a large value tends to become unstable.
In contrast, if the sensitivity is set to a low level (high-stability mode), variations in output
voltage become slightly large, but excellent stability for a capacitive load can be obtained.



Operating procedure
Press the PRCN key to toggle between the modes. When the lamp is on, the precisionmode is set; when off, the high-stability mode is set.
PRCN

PRCN

High-stability mode

Precision mode！

CAUTION

Stability for capacitive loads:
In precision mode, the upper limit of capacitive loads for stable operation is about 20F; inhigh-stability mode, stable operation is possible for up to about 1000F. Depending on the
output voltage and frequency settings, however, an overcurrent may flow, resulting in an
overload.

In DC output mode, high-stability mode is always set, so high stability can be obtained for thecapacitive load.

ES 6000W/12000W/18000W

4-24

4.5 Obtaining Precise Output

4.5.2

！

Remote sensing AGC (AC output mode)The remote sensing AGC function monitors output voltage at an arbitrarily defined position
away from the main unit (remote sensing) and provides control to keep the voltage constant(AGC).
It eliminates voltage drops through the output cable and stabilizes the voltage between bothends of a load.



The rear panel has a terminal for connection and a switch for cabling to the detection point,
and the switch is used to set a function. Power must be off when connections are made andwhen switching is performed.



You can set this function for each of phases L1 (U), L2 (V), and L3 (W).



AGC is enabled when output voltage on the output terminal of the device is in a range of 50
V to 300 V.

When output voltage is changed quickly, the waveform is clipped.



Load resistance element R, which includes the output cable and capacitance element C, mustsatisfy the following: RC1500[F･] (where C1000F, and high-stability mode is set)

WARNINGThe voltage on the connected terminal is the same as output voltage.
To ensure safety, be sure to turn off power before connecting cables.

！

CAUTION

Connect the terminal to output detection point securely with a cable with a thickness of 0.3 to
1.25-mm2. If the connection is broken or the cable becomes damaged during remote sensing
AGC, excessive voltage may be generated in the output, leading to possible damage to the load.
In such cases, the overload state is entered, and the generated overvoltage is lowered to about thenormal voltage level, but the device cannot be recovered from the overload state until the cause
4.2.9 Protection functionof the abnormality is correct and output is turned off once.

Connect the terminal to the output detection point with the correct polarity.



Operating procedure:

Performing the test

Connect the detection cable to the SENS terminal. Connect the cable so that the Hi/Lo
indication on the SENS terminal matches the indication on the output terminal.
To ensure safety, be sure to turn off power before connecting the cable.
AGC
ON

SENS
EXT

OFF

INT

ES 6000W/12000W/18000W

Hi

Lo

Slot used for
attachment anddetachment
Cable opening

4-25

Strip off part of the detection
cable jacket, Then, whilepressing theattachment/detachment slotwith a flatheadscrewdriver, insert thecable into the cable opening.
After inserting the cable, stoppressing with the screwdriver.

4.5 Obtaining Precise Output
Set the SENS INT/EXT switch to EXT.
If remote sensing AGC is not to be used, set the switch to INT.
To ensure safety, set the switch while power is off.
SENS
EXT

SENS
EXT

INT

INT

Set the AGC ON/OFF switch to ON. If remote sensing AGC is not to be used, set the switch
to OFF. To ensure safety, set the switch while power is off.
AGC
ON

AGC
ON

OFF

OFF

Turn on the device, and confirm that output control works normally.
In three-phase mode
For phase
L1 (U)

For phase
L2 (V)

Hi

Hi

Lo

L1

L2

In single-phase mode
For phase
L3 (W)Lo

Hi

L3

ES 6000W/12000W/18000W

For phase
L1 (U)

Lo

Hi

N

Lo

For phase
L2 (V)
Hi

Hi

4-26

For phase
L3 (W)

Lo

Hi

Lo

Lo

4.5 Obtaining Precise Output



AGC switch and SENS (sensing switching) switch settings
The AGC function detects the average of absolute output voltage values and provides control
to compensate for variations in load and maintain stability at high voltages.
Generally, the voltage between the both ends of a load is monitored and used to compensate
for any voltage drop through the output cable. (This operation in this device is called “remotesensing AGC.”)
The sensing switch function changes the voltage detection point for AGC and themeasurement function between the internal and external points. If EXT is set, and thedetection cable is connected to an external detection point, so-called remote sensing isenabled. Therefore, the point can also be used as a measurement point without using AGC.
By combining these two functions, you can choose from the following operations:
AGC

Sensing

Measurement value
displayed

Off

On

INT

Voltage at internal
detection point

No AGC operation(factory setting)Internal detection and
AGC operation

EXT(remote sensing)Voltage at external
detection point

No AGC operation

External detection and
AGC operation

Read the explanation of terms.

8.1 Terminology

Note:

ES 6000W/12000W/18000W

4-27

4.5 Obtaining Precise Output

4.5.3

Auto calibration (output voltage calibration function)

This function corrects the difference between the output voltage setting value and measurement valueon the basis of the measurement value. As a result, voltage drops through the output cable anddecreases in load regulation caused by the load connection can be corrected.
Operating procedure
Set output voltage to a required voltage.
4.2.3 Setting the output voltage and output voltage range
Suppose that the displayed measurement value is several percent lower than the setting value
when output is turned on with a load connected to output.
4.2.5 Turning output on and off and 4.2.8 Measurement function
DISPLAY MODE

VOLTAGE

SET/
MEAS
Peak
rms

Press the

SET/
MEAS

MEAS

Peak
rms

Ｖ
AUTO
CAL

DISPLAY MODE

VOLTAGE

SET

SET
MEAS

Ｖ

key. The lamp blinks, and the correction operation starts.

The voltage setting value is compared with the measurement value, and a correction
coefficient for adjusting the measurement value to the setting value is obtained.
Note that when the quick-change enable mode is set, the operation cannot be accepted.
4.4.1 Quick voltage change (with the frequency unchanged)

AUTO
CAL

AUTO
CAL

(Blinking during correction)

When the correction coefficient is determined, and the setting value is made to match themeasurement value, the operation ends, and the lamp goes out. The coefficient is stored inmemory supported by an internal backup battery. It is left unchanged until the key is pressedagain.
AUTO
CAL(Blinking during correction)

ES 6000W/12000W/18000W

AUTO
CAL

(Goes out after correction)

4-28

4.5 Obtaining Precise Output！

When theCAUTION
AUTO
CAL

key is pressed, the correction range is within 10% of the setting value. If

the difference between the setting value and measurement value is extremely large, or if thecorrection operation cannot end within a certain period, the operation ends with the correction
coefficient set to the default value (no correction is made) (a buzzer sounds once when theoperation ends). This tends to occur more frequently if the output voltage value is relatively low(20 V or less).
When the quick-change enable mode is set, the operation cannot be accepted. Cancel the mode,
then make the settings again.
4.4.1 Quick voltage change (with the frequency unchanged)

ES 6000W/12000W/18000W

4-29

4.6 Using External Signals

4.6

Using External Signals

4.6.1

External input (factory-installed option)

When this option is added, the device can be used as an amplifier (with a gain of 100) withan external signal input through a terminal on the rear panel.
The input impedance is 100 k (unbalanced), and the input frequency ranges from 5 Hz to1000 Hz.



Before using this option, set the maximum value of output voltage.

When external input mode is set, some functions become unavailable. All settings stored inmemory at the time of this mode setting are reset to initial values.

！

CAUTIONTo prevent failures in the device and load resulting from incorrect operation, read this section
thoroughly before making settings.

Operating procedure:

Switch setting on the rear panel

With power turned off, set the SIGNAL INPUT SEL switch on the rear panel to EXT in
advance. During the power-on sequence, the system detects the switch setting state andoperates in external input mode. All settings stored in memory are reset to initial values. The
voltage and frequency are not displayed on the controller.



Operating procedure:

Setting the allowable output voltage

Before inputting a signal, set the maximum value of output voltage. Set the maximum value
for each output voltage range.
4.2.3 Setting the output voltage and output voltage range
Since you cannot set limit values in external input mode, be sure to specify this setting.
4.3.1 Setting limit values
Press the ENBL key to turn off the lamp. Each time theis alternately turned on or off.
－ QUICK CHANGE－

START

ENBL

SEL

ES 6000W/12000W/18000W－ QUICK CHANGE－

START

4-30

ENBL

SEL

ENBL

key is pressed, the lamp

4.6 Using External Signals

When the SEL key is pressed, the currently set value of the maximum allowable output
voltage is displayed. The displayed voltage is the effective value of the sine wave, and thepeak value is 2 times the displayed voltage.
－ QUICK CHANGE－－ QUICK CHANGE－

START

START

ENBL

SEL

ENBL

VOLTAGE

SEL
Peak
rms

Ｖ

Specify the parameter value by turning the modify dial. The cursor can be moved by pressing
and
keys.
the
MODIFYDOWNUPVOLTAGE

Peakrms

VOLTAGE

Peak
rms

Ｖ

After setting a value, press theＶkey. The basic display state prior to the SEL

ENTER

key being pressed is restored, and the setting operation ends.
To check the set value, press the SEL key again to enter the setting state.

SEL

ENTER

ENTER

After ending the parameter value setting operation, press the ENBL key. The lamp goes on,
and the previously set voltage is used as the allowable output voltage.
－ QUICK CHANGE－

START



ENBL

SEL

Operating procedure:－ QUICK CHANGE－

START

ENBL

SEL

Signal input

When you have performed operations and made settings as described above, preparations forexternal input are complete. Connect a signal source, and input a signal.
The amplifier gain is 100. Turning the GAIN adjustment changes the gain by 3%. Gain
adjustment, however, affects not only external input but also internal signals. Therefore,
when you set normal mode again, calibrate with the internal signals before other operations.
6.3 Gain Adjustment

ES 6000W/12000W/18000W

4-31

4.6 Using External Signals
Note that when a signal exceeding the previously set value of allowable output voltage is
input, the voltage waveform is clipped at a voltage level as high as 2 times the set voltage,
and this results in waveform distortion.
To cancel the external input mode, turn off the device, and then set the SIGNAL INPUT SEL
switch to INT. When you turn on the device again, it detects the switch setting status andrestores operation in normal mode.

！

CAUTION

To prevent the output voltage waveform from being clipped, the input voltage must be within
4.24 V.
To prevent failures in the input section of the device, be careful not to input voltage exceeding
5 V.



When using the device in external input mode, the following functions and keys, which can beused in normal mode, cannot be used:-

Output voltage setting (but the output voltage range can be set)
4.2.3 Setting the output voltage and output voltage range
4.2.4 Setting the output frequency-

Output frequency setting-

Limit values-

Low-frequency immunity test-

Auto calibration (output voltage calibration function)

4.3.1 Setting limit values
4.4 Low-frequency Immunity Test

4.5.3 Auto calibration (output voltage calibration function)-Line synchronization-

Memory4.3.2 Line synchronization

4.3.3 MemoryWhen using the device in normal mode (with no external input used), set the switch to INT.
Even if the switch position is moved while power is on, the operation mode does not change. Be
sure to turn off the device before changing the mode, and then make settings again.
Although the external conductor of the input signal connector is connected to the housing of thedevice, it is insulated from output.
The DC component of output is suppressed when the device operates. DC input prevents thedevice from operating normally. Do not input any signal having a DC component.
“GAIN” affects not only the external input but also internal signals. When you restore normal
6.3 Gain Adjustmentmode, calibrate with the internal signal before using the device.

When the external input state is set, it applies to all phases. An internal signal cannot be used fora particular phase. Connect external signals for three phases to the external input terminal for eachphase.

ES 6000W/12000W/18000W

4-32

4.7 Introduction of Other Products of the Same Family, Peripherals, and Options

4.7

Introduction of Other Products of the Same Family,
Peripherals, and Options
The products described below are available as peripherals and options. You can use any of theseproducts to suit your application.

4.7.1

ES 4473 interface board

When connected to the rear panel of the ES 2000U three-phase master, this interface board allows
you to control the system from an external computer connected through a GPIB or RS-232 interface.
Almost all functions provided by the system can be controlled through this device.
In addition, a connector for signal I/O with an external device is provided to make available thefollowing extended functions:-

VCA (modulation) and ADD (adding superimposition) are performed for output from themain unit by using an external analog signal.

-

By using a GPIB or RS-232 interface, 8-bit general-purpose data can be output to an external
device.

-Operation status data of the main unit (e.g., output on/off and overload) can be output to an
external device.

Using this device together with the ES 0406E IEC testing software, you can conduct low-frequency
immunity tests that comply with immunity standards. (A personal computer having a GPIB interface
is necessary to run ES 0406E.)

4.7.2

ES 4474 remote terminal

Remote control operations are possible by connecting this remote control terminal to the rear panel ofthe ES 2000U three-phase master. As a result, the low-frequency immunity test function can be
expanded as well as functions provided by the main unit.
4.4 Low-frequency Immunity Test
For use of this terminal, the ES 4473 interface board is required. If the optical fiber cable unit is also
used, such control is possible from a distance of several dozen meters. (For information on opticalfiber cable connection, ask our sales staff.)

ES 6000W/12000W/18000W

4-33

4.7 Introduction of Other Products of the Same Family, Peripherals, and Options

4.7.3

ES 0406E IEC testing software

Using this program, you can perform a variety of low-frequency immunity tests (power source
environment simulations) in addition to the power source environment test functions provided by thisdevice by default.

(ES 0406E IEC testing software)Advanced tests with the use of options
Use of the options allows the following power supply environments to be simulated and thepower supply environment test functions provided by the device to be used:
Table 4-4

Supported standard tests

Standard
IEC 61000-4-11(*1)(1994) + A1(2000)

IEC 61000-4-13(2002)

Test nameVoltage dips, short interruptions and voltage
variations immunity tests
Harmonic combination test flat curve
Harmonic combination test over swing
Sweep in frequency
Individual harmonics test
Interharmonics
Meister curve test

IEC 61000-4-14(1999) + A1(2001)
IEC 61000-4-27(*2)(2000)IEC 61000-4-28(1999) + A1(2001)
IEC 61000-4-29(*2)(2000)

Other tests

Voltage fluctuation test
Unbalance test
Variation of power frequency test
Voltage dips, short interruptions and voltage
variations on d.c. input power port.
Abrupt change in phase and voltage test

Unbalance in single-phase three-wire systems andthree-phase systems test
Arbitrary waveforms test
*1: The As-517 voltage dip simulator manufactured by NF Corporation is required.
*2: With the ES 0406E IEC testing software, preparatory tests can be performed.

ES 6000W/12000W/18000W

4-34

5. Specifications
5.1

ES 6000W/12000W/18000W

Three-phase/single-phase switching system(cabinet type) ....................................................................... 5-1
5.1.1 Output rating ............................................................. 5-1
5.1.2 AC output .................................................................. 5-2
5.1.3 DC output (valid only in single-phase operation) ....... 5-5
5.1.4 Measurement function .............................................. 5-7
5.1.5 AGC and remote sensing (AC output mode) ............. 5-8
5.1.6 Auto calibration(AC output voltage calibration function) .................... 5-9
5.1.7 Memory function ....................................................... 5-9
5.1.8 Limit value setting ..................................................... 5-9
5.1.9 Key lock .................................................................... 5-9
5.1.10 Low-frequency immunity tests ................................... 5-9
5.1.11 Three-phase/single-phase switching ........................ 5-11
5.1.12 Interface board (option)............................................ 5-11
5.1.13 External signal input(AC output mode: factory-supplied option) ............ 5-12
5.1.14 Power supply input .................................................. 5-12
5.1.15 Other information ..................................................... 5-13

5.1 Three-phase/single-phase switching system (cabinet type)

5.1

Three-phase/single-phase switching system(cabinet type)5.1.1

Output rating

Unless otherwise noted, the following conditions are assumed:

A rated load (pure resistor load with which the rated power is obtained with the rated output
voltage) is connected.



Output voltage is the voltage on the output terminal of the cabinet.



AGC is set to off, and remote sensing is set to internal mode.

ES 6000W/12000W/18000W

5-1

5.1 Three-phase/single-phase switching system (cabinet type)5.1.2

AC output

Three-phase/single-phase output
Three-phase/single-phase switching mode
Rated output power(*1) ( *2) (*4)

ES 6000W
Threephase

Single
phase

6 kVA

ES 12000W
Threephase

Singlephase

12 kVA

ES 18000W
Threephase

Singlephase

18 kVA

Three-phase: Three-phase 4-wire balanced (Y connection), floating
output, neutral point grounding possible
Single-phase: Single-phase 2-wire, floating output, single-wiregrounding possible

Output form
Terminal block screws of terminals(dedicated for three- or single-phase mode)
Output waveform
100-V range
Rated output voltages
200-V range
100-V range
Output voltage setting
ranges200-V range
Output voltage setting resolution
Maximum output
100-V range(*1) (*2) (*4)
current(line current in
200-V range
three-phase mode)
Precision mode
Maximum output
current
High-stability(*3)(peak value)mode
Setting range
Setting resolution
Setting accuracy
Output frequency
Stability
Power frequency
synchronization

Three-phase angle (*9)
Three-phase angle
accuracy
Load regulation
(*5)

M6

M5

M5

M10

M6

Sine wave
100 Vrms (phase voltage in three-phase mode)
200 Vrms (phase voltage in three-phase mode)
0 to 150 Vrms (phase voltage in three-phase mode)
0 to 300 Vrms (phase voltage in three-phase mode)
0.1 Vrms (phase voltage in three-phase mode)
20 Arms

60 Arms

40 Arms

120 Arms

60 Arms

180 Arms

10 Arms

30 Arms

20 Arms

60 Arms

30 Arms

90 Arms

Up to 3.5 times effective value
Up to 2.7 times effective value
5 Hz to 1100 Hz
0.01 Hz1  10-4
5  10-5
Enable (synchronization range 48 to 62 Hz)
120

40 Hz to 100 Hz

1

5 Hz to 450 Hz

2

5 Hz to 1000 Hz

5

Precision mode
High-stability
mode

0.5%

1%

1%

1.5%

(*6)

Line regulation
Output voltage stability (*7)
Load power factor range (*4)

0.2%

Frequency characteristic
Output voltage waveform distortion rate

1 dB (40 Hz to 1 kHz, rated output voltage)
0.5% or less (rated output voltage)

Output noise level (*8)

300 mVrms or less

Output offset voltage

15 mV (DC)ES 6000W/12000W/18000W

M10±100 ppm/°C (typ.)，100 ppm/8 h (typ.)0 to 1 (lead or lag)5-2

5.1 Three-phase/single-phase switching system (cabinet type)*1: Output current decreases when the rated output voltage is exceeded, as shown in thefollowing figure:
120
100
80
66.7
Output current/maximum output
current  100 (%)

60
40
20
0

50

100

150

Output voltage/rated output voltage  100 (%)

Figure 5-1

Output voltage vs. output current characteristic*2: Output current decreases depending on the output frequency, as shown in the following
figure:
120

∫∫

100
90
80
Output current/maximum output
current  100 (%)

60
50
40

20

5

40

∫∫

500

1000

Output frequency (Hz)Figure 5-2

Output frequency vs. output current characteristic*3: Ratio of the peak value of current flowing to a capacitance input-type rectifier load at a rangeof 45 to 70 Hz to the effective value

ES 6000W/12000W/18000W

5-3

5.1 Three-phase/single-phase switching system (cabinet type)*4: Load power factor
PFr is the minimum load power factor allowable for supply of the maximum output current,
and it is obtained from output voltage Vo and output frequency fo as follows:
PFr = 7Vo (fo-5)  10-7 +0.75
When output voltage is set with the range as the 200-V range, Vo is 300, and the rms value is
200 Vrms, and when output voltage is set with the range as the 100-V range, Vo is 150, andthe rms value is 100 Vrms. PFr is plotted below for the output frequency.
1
0. 95
0. 9

PFr, minimum
load power
factor allowable
for supply of
maximum
output current

0. 85

Vo = 100V
Vo = 150V

0. 8

Vo = 200V
Vo = 300V

0. 75
0. 7

200

400

600

800

1000

1200

Output frequency fo (Hz)Figure 5-3

Output frequency vs. minimum load power factor thatallows supply of the maximum output current

If the load power factor, PF, is smaller than PFr, the output current that can be supplied
decreases for the maximum output current as follows:
Output current/maximum output current = 93.3 (PF-PFr) + 100 (%)
Where, output current  Rated value
If PFr is 0.95, 0.85, or 0.75, the output current that can be supplied decreases for the
maximum output current as follows:
120
100
80

Output current/maximum
output current  100 (%)

PFr = 0.95
PFr = 0.85
PFr = 0.75

60
40
20
0

0

0.2

0.4

0.6

0.8

Load power factor PF

Figure 5-4

ES 6000W/12000W/18000W

Load power factor PF vs. output current

5-41

5.1 Three-phase/single-phase switching system (cabinet type)
The capacitance of a connectable capacitor as the power factor load is restricted to 1000 For less when high-stability mode is set and to 20 F or less when precision mode is set.
The output current is obtained by multiplying output voltage, frequency, and the decreasecaused by the load power factor.
*5: For load changes ranging from 0 to 100% at the rated output voltage.
This is applicable in a range of 45 Hz to 100 Hz. This is the voltage on the main output
terminal of the single-phase master, three-phase master, and three-phase slave*6: For power supply voltage changes ranging from 170 V to 220 V at the rated output voltage*7: Rated output voltage, no load, one hour after power-on*8: For output voltage set to 0 V, frequency band of 20 Hz to 100 kHz*9: When the angle of phase L1 (U) is 0, phase L2 (V) has a lag of 120 and phase L3 (W) has alag of 240.

5.1.3

DC output (valid only in single-phase operation)

This mode is valid in single-phase mode.
You can switch between AC output and DC output modes when output is off.
Single-phase DC output
Unless otherwise noted, the following conditions are assumed:


Rated load connection (pure resistor load with which the rated power is obtained withthe rated output voltage)

Output voltage that is the voltage at the last output terminal of the cabinet
In DC output mode, the AGC function does not work regardless of the switch setting.

Single-phase mode

ES 6000W

ES 12000W

ES 18000W

Rated output power (DC)
Form
Single-phase

3.81 kW
7.62 kW
11.43 kW
Voltage unipolar output Output Hi (+) Lo (-)

Rated output

100-V range+141 V

voltages

200-V range+282 V

Output voltage

100-V range

0 V to +203.0 V

setting ranges

200-V range

0 V to +406.0 V

Output voltage setting resolution
Maximum output
current (*10)
Output voltage stability

0.1 V

100-V range

+27 A

+54 A

+81 A

200-V range+13.5 A

+27 A

+40.5 A(*7)

Output offset voltage

500 ppm/°C (typ.), 500 ppm/8 h (typ.)500 mV (adjustable)*10: The maximum output current decreases according to the output voltage, as shown below.

ES 6000W/12000W/18000W

5-5

5.1 Three-phase/single-phase switching system (cabinet type)Outputcurrent

Io[Adc]+141V

Maximum output
current in 100-V range

Output current (Io) = Rated
output power/output voltage (Vo)

100-V
range

+282V

Maximum output
current in 200-V range

200-V
range
Vo[Vdc]0

Output voltage+406V- (maximum output
current in 200-V
range)

Output current (Io) =-448  (rated output power (DC))／1.27kW)／(output voltage (Vo)+15V)+74.6V- (maximum output
current in 100-V
range)+29.8V

Figure 5-5

！

+203V

Output voltage in DC output mode vs. output current characteristic

CAUTION

DC output








Voltage cannot be output on the negative side.
As the operation mode, only the high-stability mode is set, which provides good stability forcapacitive loads.
Protection operation in DC output mode
When voltage is decreased with a capacitor connected to output, current continues to flow to thedevice. For this reason, protection is provided by ensuring the current remains lower than theabove-mentioned maximum output current. The protection circuit may operate to turn off output,
if required.
Connection of a capacitive load
Stopping diode,
When using a capacitor (150 µF orreverse breakdown
more) or a motor as the load,
voltage of 600 V orconnect a stopping diode to prevent
more
reverse current input.
Capacitor (or motor)
When using an inductor as the load,
load
connect a free-wheeling diode toabsorb counter the electromotive(P-STATION/ES main unit)
force generated when output is off.
When output is turned on or off,
output voltage is set to 0 V before
the on/off switching operation toprotect the output relay contact.
Consequently, when output isturned on while a capacitor isconnected to the output, current tothe capacitor may cause theprotection circuit to operate,
resulting in output being turned off.

ES 6000W/12000W/18000W

Free-wheeling diode,reverse breakdown
Inductor load
(P-STATION/ES main unit)

5-6

5.1 Three-phase/single-phase switching system (cabinet type)5.1.4

Measurement function

Voltmeter(effective value)
Ammeter(effective value)
Voltmeter(peak value)
Ammeter(peak value)

Active power meter
Apparent power andpower factor

Measurement
range (FS)

Resolution

480 V

0.1 V

80 A

0.01 A

800 A

0.1 A

480 V

0.1 V

80 A

0.01 A

800 A

0.1 A

2 kW

0.1 W

20 kW

1W

200 kW

10 W

AC modeaccuracy

DC modeaccuracy

Conditions

1% FS

3% FSDC, 40 Hz to 1 kHz,
10%FS to 100%FS,
including non-sinewave

3% FS

3% FSDC, 40 Hz to 1 kHz,
10%FS to 100%FS,
sine wave

(1.5%rdg +0.2%FS)(at power
factor 1)(Notmeasured)

45 to 65 Hz. sine
wave, voltage of 50
Vrms or more, 10% of
rated current or more

Displayed after having been calculated based on measurements of voltage, current,and effective power

FS:

Full scale

rdg:

ReadingIn three-phase mode, the voltmeter and active power meter specifications apply to displayed
values of phase voltage and phase power.

In three-phase mode, the values of the total apparent power, active power, and power factorof the three phases are obtained through calculation and displayed.

The measurement ranges of the voltmeter (effective value) and ammeter (effective value) areswitched automatically based on the peak value.



As peak values of both voltage and current, the waveforms on the negative side are detectedin AC output mode, and the waveforms on the positive side are detected in DC output mode(with reference to the “Lo” output terminal).



Active power can be measured only in AC output mode.

The measurement range of active power is automatically changed according to the current
peak value.

Measurement range of wattmeter
Current peak value


20 kW

2 kW

0A

to

7.3 A

to

200 kW
77 A

to

The displayed power value in DC output mode is the apparent power VA of the values
calculated based on the effective voltage and current values.

ES 6000W/12000W/18000W

5-7

800 A

5.1 Three-phase/single-phase switching system (cabinet type)

5.1.5

AGC and remote sensing (AC output mode)Use of the AGC function and sensing switching enables the operations listed below.
In DC output mode, the AGC function does not work regardless of the switch setting.


AGC function
This function reduces output voltage variations. Variations in voltage at a sensing point are
reduced.



Remote sensing AGC [AGC set to on, sensing set to external mode]
If the AGC sensing point is changed to an external point, and voltage on the load terminal ismonitored, remote sensing AGC compensates for voltage drops caused by the output cable.



Sensing switching
The AGC sensing point, which can also be used as the voltage measurement point of themeasurement function, can be switched.
AGC

Measurement value

Sensing

displayed

Off

On

INT

Voltage at internal
detection point.

No AGC operation(factory set)

Internal detection and
AGC operation

EXT(Remote sensing)Voltage at external
detection point.

No AGC operation

External detection and
AGC operation(Remote sensing AGC)

Output rating when remote sensing AGC is used
RatingConditions

0.2%

5 Hz to 400 Hz

0.3%

400 Hz to 1 kHz

Frequency characteristic

0.05 dB

40 Hz to 1 kHz

Voltage waveform
distortion rates

0.5% or less

40 Hz to 1 kHz

1% or less

5 Hz to 40 Hz

50 ms or lessAt output voltage of 100 V

25 ms or lessAt output voltage of 200 V

Load regulation

Response times
Output cable voltage dropcompensation range

At sensing input terminal
At sensing input terminal,
with no load
At rated output voltage on
output terminal

Up to 5% of voltage or 10 V, whichever is smaller

Output cable resistance R and load capacity C must satisfy the following:
RC  1500 [F･](where C  1000F in high-stability mode)

Output voltage must be in a range of 50 V to 300 V. The load must be a pure resistor.

When output is changed quickly, the waveform is clipped.

ES 6000W/12000W/18000W

5-8

5.1 Three-phase/single-phase switching system (cabinet type)

5.1.6

Auto calibration (AC output voltage calibration function)

This function calibrates AC output voltage. This function corrects output voltage so that the output
voltage measured by the measurement function (voltage at the sensing point) equals the AC output
voltage setting.

5.1.7

Correction range

10% (Difference between setting and measurement value)

Correction accuracy

1% FS (at 40 Hz to 1 kHz, 50 V or more)

Memory function

This function can store 120 sets of settings specified from the controller except those made with themeasurement function (memory addresses 1 to 120). Immediately after power is turned on, thesettings stored at memory address 1 are assumed.
When the optional ES 4473 interface board is installed, the GPIB and RS-232 parameters are notstored at the above memory locations but at other locations.

5.1.8

Limit value setting

The upper and lower limits of the output frequency and the upper limit of output voltage can be set.
The setting range and setting resolution are the same as those for normal frequency and voltage
settings.

5.1.9

Key lock

The key lock switch can be set so as to prevent operations from the controller from being accepted.

5.1.10 Low-frequency immunity tests
Low-frequency immunity tests can be performed with the quick voltage change (with the frequency
unchanged) and voltage variation (with a frequency variation) functions.


Quick voltage change (with the frequency unchanged) function
Parameters that can be set or controlled:
VSTR: Start level
TQ1:

QC timeV A:

QC level:

QC start phase

ES 6000W/12000W/18000W

5-9

5.1 Three-phase/single-phase switching system (cabinet type)

QC time
QC start phase

Setting range

Setting resolution

0.1 ms to 6 s

0.1 ms6 s to 60 s

1 ms

60 s to 600 s

10 ms

0 to 360

1°

Accuracy(0.2 ms + setting value  10-4)

The start level and QC level setting ranges must be within the output voltage setting range.

VSTR

VA

θ



TQ1

Voltage variation (with a frequency variation) function
Parameters that can be set or controlled:
During the voltage variation (with a frequency variation)
VSTR:

Start level

TA:

VSTP:

End level

fSTP: End frequency

Transition time

Transition time

Setting range

Setting resolution

0 to 99.9 s

0.1 s

fSTR:

Start frequency

Accuracy0.1 s

The start level, end level, and start frequency setting range must be within the output voltage
setting range.

TA

VSTP ,fSTP

VSTR ,fSTR

ES 6000W/12000W/18000W

5-10

5.1 Three-phase/single-phase switching system (cabinet type)5.1.11 Three-phase/single-phase switching
You can switch between single-phase output and three-phase output.

5.1.12 Interface board (option)
If the optional ES 4473 interface board is installed, the general-purpose interface bus (GPIB), which
is used by most measuring devices, and RS-232 communication interface can be used. Using theboard together with the ES 0406E IEC testing software facilitates low-frequency EMC testing.
In addition, output voltage can have an added analog signal (ADD), and control of the output voltage
amplitude (VCA) is possible with the control voltage signal.

General-purpose interface
Select and use one of the following interfaces:



-

GPIB

IEEE-STD-488.1-1987 compliant-

RS-232

JIS-C-6361 compliant

External analog control input
Addition input (ADD)
Input impedance

20k, unbalanced

Addition frequency range

10 Hz to 1 kHz

Addition sensitivity

10%/V

Polarity

I/O in phase

Input terminal

CONTROL SIGNAL connector (D-sub) on rear panel

Amplitude modulation input (VCA)
Input impedance

20k, unbalanced

Modulation frequency range

DC to 100 Hz

Modulation sensitivity

10%/V

Polarity

Output voltage is increased by positive input increases
and decreased by negative input.

Input terminal

CONTROL SIGNAL connector (D-sub) on rear panel

ES 6000W/12000W/18000W

5-11

5.1 Three-phase/single-phase switching system (cabinet type)5.1.13 External signal input(AC output mode: factory-supplied option)
If this option is specified, the following external signal can be input in AC output mode:
Input impedance

100k, (unbalanced)

Input frequency range

5 Hz to 1 kHz

Maximum input voltage

5V

Gain

100

Terminal

BNC connector on rear panel

Switching method

After the switch on the rear panel is set to EXT, the switch
setting becomes valid only when power is turned on.

5.1.14 Power supply input
Voltage range

Three-phase, 170 to 220 Vrms

Frequency range

48 Hz to 62 HzPower factor

0.9 or more (0.97 typ. at rated output)

Terminal

Screw terminal block
Note:

Protective ground terminal provided

Cabinet configurations and power consumption
Three-phase/singlephase output
Cabinetconfiguration

ES 6000W

ES 12000W

ES 18000W

S1

L1

L1 + S1

Approximately
11.4 kVA

Approximately
22.8 kVA

Approximately 34.2 kVA
Power consumption

L: Approximately 22.8 kVA
S:L:

L-type cabinet, S:

S-type cabinet

ES 6000W/12000W/18000W

5-12

Approximately 11.4 kVA

5.1 Three-phase/single-phase switching system (cabinet type)5.1.15 Other information

Temperature and humidity ranges

Guaranteedperformance+5°C to +35°C

5% to 80%RH, where absolute humidity is 1 to 25 g/m3.
No condensation is allowed.

Guaranteed
operation

0°C to +40°C

5% to 80%RH, where absolute humidity is 1 to 25 g/m3.
No condensation is allowed.

Storagecondition–10°C to +50°C

5% to 95%RH, where absolute humidity is 1 to 29 g/m3.
No condensation is allowed.



Insulation resistance
Chassis and all power supply inputs to output, and chassis and all outputs to power supply
input
Three-phase/single-pha
se output

ES 6000W

ES 12000W

Insulation resistance(500 VDC)

3.3 M or more

1.6 M or moreL:

L-type cabinet, S:

ES 18000W
L:S:

1.6 M or more
3.3 M or more

S-type cabinet

Withstand voltage
AC 1500 Vrms for one minute (50/60 Hz): Chassis and all power supply inputs to output,
and chassis and all outputs to power supply
input



External dimensions
L-type cabinet(width) 790 mm  (height) 1559 mm  (depth) 900 mm (protrusions not included)
S-type cabinet(width) 570mm  (height) 1559 mm  (depth) 900 mm (protrusions not included)



WeightThree-phase/single-phase
outputWeightL:

L-type cabinet, S:

ES 6000W/12000W/18000W

ES 6000W

ES 12000W

Approx. 200 kg

Approx. 370 kg

S-type cabinet

5-13

ES 18000W
L:
S:

Approx. 370 kg
Approx. 200 kg

5.1 Three-phase/single-phase switching system (cabinet type)

Installation
Install the device at a location that satisfies the following conditions:

Indoor area not exposed to direct sunlightEnvironment whose temperature and humidity are within the rated values
Note: There must be no condensation.

Area with little dustPlace at which corrosive, explosive, or flammable gas is not presentPlace at which the device not likely to come in contact with fire or water

Area with enough space so that the front and rear of the device are at least 50 cm apartfrom walls and other objects that could obstruct the vents and reduce the effect ofcooling air (This system uses a fan for forced air cooling. If air flow is obstructed, thedevice can therefore not be used within the temperature range of guaranteed operation.)Standard data
Output voltage (50 Hz, 0 dB)
(dB)
0.3
0.2

Precision mode
0.1

100V

200V

0
200V

-0.1

High-stability mode

100V

-0.2
-0.3

5

10

50

100

500

1k

Frequency (Hz)100 V denotes the 100-V range, and 200 V denotes the 200-V range.
SIG SELECT is set to INT, with a rated load.

Figure 5-6

ES 6000W/12000W/18000W

Output voltage vs. frequency characteristic

5-14

5.1 Three-phase/single-phase switching system (cabinet type)

Distortion rate
(%)
0.5

0.3

100V

0.2

High-stability mode

0

200V
100V

Precision mode

0.1

200V

0.08
0.05

5

10

50

500

100

1k

Frequency (Hz)100 V denotes the 100-V range, and 200 V denotes the 200-V range.
SIG SELECT is set to INT, with a rated load.

Figure 5-7

Total harmonic distortion ratio vs. frequency characteristic

Load regulation(%)
3
2
Precision mode
1

100V

0

200V
200V

-1
High-stability mode
-2
-3

5

10

50

100

100 V denotes the 100-V range, and 200 V denotes the 200-V range.
SIG SELECT is set to INT.

Figure 5-8

ES 6000W/12000W/18000W

Load regulation vs. frequency characteristic

5-15

100V

1k
500
Frequency (Hz)

6. Maintenance
6.1
6.2
6.3
6.4

ES 6000W/12000W/18000W

Cleaning the Air Filter........................................................... 6-1
Backup Battery..................................................................... 6-2
Gain Adjustment ................................................................... 6-3
Operation Checks ................................................................ 6-4
6.4.1 Check method ........................................................... 6-4

6.1 Cleaning the Air Filter

6.1

Cleaning the Air Filter
Dust that enters and sticks to the device absorbs water from air, possibly leading to the rusting of
metal inside and degraded insulation performance. These effects may have negative consequences on
the high-voltage parts inside the device.
For this reason, the intake vent in the front section is equipped with an air filter to remove dust fromair flowing through the vent.
If dirt sticking to the filter is not removed, the filter becomes clogged, which causes poor ventilation
and results in a higher internal temperature, which can cause reliability to deteriorate.
Therefore, clean the filter carefully with water to remove dirt. Before installing the filter again, allow
the filter to dry completely.
The filter alone, however, does not have an adequate effect, because its reliability deteriorates fromvery fine dust (impalpable powder) in the air, and when the filter becomes clogged. Therefore, it isstrongly suggested that the device be installed at a place that does not have a significant amount of
dust (including impalpable powder), a high level of humidity in which condensation forms easily, or
corrosive, explosive, or flammable gas.

ES 6000W/12000W/18000W

6-1

6.2 Backup Battery

6.2

Backup Battery
The contents of memory (4.3.3 Memory) and other necessary parameters and data areprotected with a vanadium-lithium (VL) secondary battery included in the ES 2000U three-phasemaster.
The battery is completely discharged immediately at the time of shipment from the factory. It is fully
charged after the device has been powered for 50 hours.
After that, the battery can be kept fully charged if the device is powered for at least 20 hours per
week.
When the battery is fully charged, it can provide backup power to the internal storage device forabout 60 days, but this period varies from battery to battery and depends on the ambient temperature.
A degraded battery can serve as a backup power source for a shorter period, but if the battery can nolonger serve this function for practical length of time, NF Corporation will replace it. Contact us or
one of our agents.
If the device is stored for six months or longer without receiving power, the battery service life isshortened. Therefore, it is recommended that the device be turned on occasionally.
Each time the device is turned on, it checks the consistency of the backup data. If any part of the
backup data is destroyed, the device displays an error message (7.1 Error Messages) andresets all the data to the default state. (4.3.4 Memory storage and initial settings)

ES 6000W/12000W/18000W

6-2

6.3 Gain Adjustment

6.3

Gain Adjustment
The voltage gain of the internal power amplifier can be adjusted from the rear panels of the ES
2000U three-phase master and ES 2000P three-phase slave.
2.3 Rear Panels (Common to Each Model)
Gain adjustment
Turn here with a precision flatheadscrewdriver (-). Turning it clockwise
increases the gain.

Rear panel of ES 2000U three-phasemaster (with external signal input
option installed)

Rear panel of ES 2000P three-phaseslave (with external signal input option
installed)

This section describes how to adjust the gain of the internal amplifier by using the measurement
function of this device. To adjust the gain, follow the procedure below.
(1) If the external signal input option has been added, cancel external
input. Set the SEL switch to INT.
(2) Turn on the device. Set the output voltage range to 200 V and output voltage to 0 V. Output
must not be turned on.
(3) Press the

AUTO
CAL

key. The system performs auto calibration, which ends with the soundingof a buzzer.
(This operation resets the correction constant stored in internal memory.）(4) Set output voltage to 300.0 V. Output must not be turned on.
(5) Press the

SET/
MEAS

key to set the display mode to the mode fordisplaying measurement values.
(6) Press the

L1/
L2/L3

DISPLAY MODE
SET/
MEAS

SET
MEAS

key, which displays the phase voltage of each phase sequentially, and set

the gain adjustment so that 300.0 V is displayed as the voltage measurement for each of themaster and slaves.
When the auto calibration function is used, output voltage is automatically corrected by themeasurement function of the device, so the adjustment procedure described here is notnormally required.
4.5.3 Auto calibration (output voltage calibration function)
However, this adjustment mechanism affects both signals from the internal signal generator
and signals input externally. When the normal internal signal mode is restored with external
input after gain is adjusted, a re-adjustment operation is required.
4.6.1 External input (factory-installed option)

ES 6000W/12000W/18000W

6-3

6.4 Operation Checks

6.4

Operation Checks
Using the methods of checking operation explained in this section, users can easily check operation
without opening the device.
For a load test, a power resistor having a capacity corresponding to the maximum power supplied by
the system must be used as a load. If preparing such a load is too difficult, perform only a no-load
test. This can check basic operation of the device.
In cases where each unit must be inspected separately, where load tests are required, or where an
inspection shows the necessity of calibration or repair, contact us or one of our agents.
If you do not understand an operation, see detailed operation information on the page indicated by(
Reference).

6.4.1


Check method
Necessary instruments


AC voltmeter, AC ammeter: 2014 (YOKOGAWA ELECTRIC) or equivalent
Note: Voltage and current are measured at a range of 50
Hz to 60 Hz.

Oscilloscope:

2445B (Tektronixs) or equivalent
Note: With a bandwidth of approximately 100 MHz anda cursor measurement function, observe the phaseshift between phases at a range of 50 Hz to 60 Hz.



Settings for checks

If the external input mode is set, change the mode to the internal mode.
4.6.1 External input (factory-installed option)

Turn off the AGC function, and set sensing to internal sensing. (Cancel remote sensing
AGC.)
4.5.2 Remote sensing AGC (AC output mode)

Set the output frequency to 50 Hz or 60 Hz.
4.2.4 Setting the output frequency

Set the compensation mode to precision mode.
4.5.1 Precision and high stability (setting of the compensation mode)Cancel the quick-change enable mode.
4.4.1 Quick voltage change (with the frequency unchanged)

ES 6000W/12000W/18000W

6-4

6.4 Operation Checks

Check method

Before connecting a load or measuring instrument to output, turn off output.
4.2.5 Turning output on and off

Set output voltage to 100 V.
4.2.3 Setting the output voltage and output voltage range

The system performs auto calibration.
4.5.3 Auto calibration (output voltage calibration function)

Using the measurement function, measure the output voltage for each phase, and checkto confirm that each measurement value is within 0.3% (standard value) of the setting
value.
4.2.8 Measurement function

Set output voltage to 200 V, and repeat the steps for checking.



Use the neutral point as a reference, observe the voltage of each of phase L (U)(three-phase master), phase L2 (V) (three-phase slave), and phase L3 (W) (three-phaseslave) by using an oscilloscope. With the waveform of phase L1 (U) as the base forcomparison, confirm that the waveform of phase L2 (V) has a lag of 120 and the
waveform of phase L3 (W) has a lag of 240 (which indicates that the three phases arebalanced).

ES 6000W/12000W/18000W

6-5

7. Troubleshooting
7.1
7.2

ES 6000W/12000W/18000W

Error Messages.................................................................... 7-1
When an Error Seems to Have Occurred ............................. 7-2

7.1 Error Messages

7.1

Error Messages
When turned on, this device checks system connections and the system configuration. If an
abnormality is found, the device indicates an error on the controller. The value displayed following
the “ERR” indication denotes the error.
Descriptions of errors, and the device response, and the appropriate action that users should take foreach error indicated are listed below.
Not every indicated error leads to a serious problem if left as is. However, if an error is indicated,turn off power to the device and check the relevant parts individually.
Example of indicated error
VOLTAGEPeakrms

CURRENT/PHASE/MEM ADRS

Ｖ

Peak
rms

deg

Cause
Contents of internal
ROM memory weredestroyed.

An internal RAM
memory operation
check found anerror.

Part or all of data inmemory supportedby the internal
backup battery waslost.

Is power being
supplied to bothconnected
three-phase slaves?

ES 6000W/12000W/18000W

PF

kVA

kW

ms

s

Hz

Indicates the type of error that occurred.
(See the table below.)

Indicates that an error occurred (Err).

Error indicationＡ

FREQUENCY/TIME/POWER

Necessary response or explanation
A component may be defective.
Check the indicated error, and contact us or one of ouragents.
Operation stops when this is displayed, and it remains
displayed until the device is turned off.

If this error occurs, the error is indicated for 2 seconds
before all stored data is reset to default values and normal
operation starts.
4.3.4 Memory storage and initial settings
This error may occur when the device has remained
powered off for a long time. If this error occurs
frequently, the battery characteristic of the backup battery
may have deteriorated.
6.2 Backup Battery
Remove the front cover, and check whether all breakers of
the power unit are set to on. If a breaker is set to off, turn on
the breaker, and turn on power again.
If this remains displayed after the above operation, a failure
may have occurred in the internal signal transfer path.
Check the indicated error, and contact us or one of ouragents.

7-1

7.2 When an Error Seems to Have Occurred

7.2

When an Error Seems to Have Occurred
If you believe an error occurred during use of the device, see the table below to check whether theobserved device behavior is really an error and whether the operating procedure, method of use, andcable connections are correct.
If your situation is not covered by the descriptions below, there could be danger from a secondary
failure if a failure did occur. In such cases, contact us or one of our agents, and do not turn on thedevice.



Behavior observed during power-on or power-off
Behavior

When the power switch isturned off during operation,
operation does not stop
immediately.

Cause or condition

Appropriate action and explanation

The relevant capacitor in aninternal circuit has a large
capacitance and is being
discharged.

This is not abnormal.

When the power switch isturned on, operation does notstart for several seconds.

The power switch was turned
off and turned on again soonafterward, and the relevant
capacitor with a large
capacitance in an internal
circuit is still being discharged.

This is not abnormal.

Turning on the power switch
does not start operation at all.

Is the power definitely being
supplied?

Check whether the power isdefinitely being supplied.

The power switch was turned
off and turned on again soonafterward.

Before turning on the switch to
power on again, wait about 10
seconds. If operation does not start
after this waiting of 10 seconds, afailure may have occurred.

Before turning on the switch to
power on again, wait about 10
seconds.

Operation stops about fiveseconds later.



The device is turned on about 10
seconds later.

Behavior related to output voltage setting and voltage range setting
Behavior

Cause or condition

The voltage range cannot bechanged from 200 V to 100 V.

Does output voltage or the QC
voltage setting exceed 150 V?

OUTPUT RANGE
100V/
200V

Appropriate action and explanation
Set them to 150 V or less.
VOLTAGE

100V
200V

Peak
rms

Output voltage cannot be set.

Is external input set?

ES 6000W/12000W/18000W

7-2

Cancel external input, and set
normal mode.
4.6.1 External input(factory-installed option)Ｖ7.2 When an Error Seems to Have Occurred

Behavior related to frequency settings
Behavior

Cause or condition

Appropriate action and explanation

The output frequency cannot beset.

Is line synchronization turnedon?

Before setting it, turn off line
synchronization.
4.3.2 Line synchronization

LINE
SYNC

LINE
SYNC

－ENTRY－

VOLT

FREQ

Line synchronization cannot be
set.
LINE
SYNC

Is external input set?

Cancel external input, and set
normal mode.
4.6.1 External input(factory-installed option)

Is the upper frequency limit
value less than 55 Hz, and is
the lower limit value greaterthan 55 Hz?

Set the upper and lower frequency
limits so they define a range that
includes 55 Hz. (Set the upper limit
to 55 Hz or higher and the lower
limit to 55 Hz or lower.)
4.3.1 Setting limit values－ LIMIT－
SEL

Line synchronization cannot be
set. Alternatively, line
synchronization cannot becanceled.

Is external input set?

Cancel external input, and set
normal mode.
4.6.1 External input(factory-installed option)

Is output set to on?

Setting and cancellation are notpossible unless output is turned off.
4.2.5 Turning output on and
off

LINE
SYNC

OUTPUTOFF

ES 6000W/12000W/18000W

UPR LWR

ON

OFF/ON

7-3

OUTPUT
OFF

ON

OFF/ON

7.2 When an Error Seems to Have Occurred

Behavior related to overload (4.2.9 Protection function)

Behavior

Cause or condition

The overload lamp goeson.

Has the overload state been entered?

Check the load, and use the load
within the rating.

Has the device been turned off?

This is not abnormal.

OVERLOAD

Appropriate action and explanation

Has the device been turned on?
Output voltage increased suddenly.
Output was turned on.
A QC operation started or ended.

If the lamp is on for a short time,
this is not abnormal.

The voltage range was changed.

This occurs at the time of external
input.

Is the AGC switch set to
on?

AGC
ON

Is the output voltage waveform
clipped because of an excessive
input signal? Check whether the
input signal value is appropriate.
Confirm that values are 3.00 Vrms
and 4.24 Vp or less.
Check whether the compensation
range (up to 5% of the output
voltage or 10 V, whichever issmaller) has been exceeded.

OFF

Is the SENS switch set to
EXT?

SENS
EXT

Confirm that the sensing cable isconnected securely and correctly.
INT

Remove the front cover, and check
whether all breakers of the power
unit are set to on.
Is power being supplied to thethree-phase slaves and boosters?

ES 6000W/12000W/18000W

7-4

If a breaker is set to off, turn on the
breaker, and turn on power again.
If a breaker is turned off again, amalfunction may have occurred. In
this event, contact us or one of ouragents.

7.2 When an Error Seems to Have Occurred

Behavior related to the measurement function
Behavior

Switching between theeffective value and peakvalue is not possible.

Cause or condition

Appropriate action and explanation

Is DISPLAY MODE set to SET?

Before attempting switching, set
MEAS.
4.2.8 Measurement function

Measurement phaseswitching for MEASURE
is not possible.

SET/
MEAS

SET

SET/
MEAS

MEAS

Is power being supplied to boththree-phase slaves?

L1/
L2/L3



DISPLAY MODEDISPLAY MODE

Peak/
rms

SET
MEAS

Turn off the master, turn on the
power switches of both three-phaseslaves, and then turn on the masteragain.

POWER

Behavior related to auto calibration
Behavior

Auto calibration cannot be
performed.

AUTO
CAL

Cause or condition

Appropriate action and explanation

Is the frequency lower than 40
Hz?

Set the frequency to 40 Hz or higher sothat the operation can be performed.

Is the quick-change enable mode
set?

Cancel the enable mode so that theoperation can be performed.
4.4.1 Quick voltage change(with the frequency unchanged)－QUICK CHANGE－

START

ENBL

Is external input set?

ES 6000W/12000W/18000W

7-5

SEL

Cancel external input, and set normal
mode.
4.6.1 External input(factory-installed option)

7.2 When an Error Seems to Have Occurred

Behavior related to quick voltage changes (QC:
Behavior

Cause or condition

Operations with thequick-change parametersetting key cannot be
accepted.

Is the quick-change enable mode
set?

ENBL

SEL

A quick change cannot
start.
－QUICK CHANGE－
START

ENBL

Before attempting this operation,
cancel the enable mode.

ENBL

ENBL

Is the quick-change enable modeset?

The operation cannot start unless theenable mode is set.
4.4.1 Quick voltage change(with the frequency unchanged)

ENBL

ENBL

Have you performed theoperations made necessary
because the ES 4474 remoteterminal or ES 4473 interface
board was connected? If either ofthese options was used, itscorresponding mode may be set.
Consequently, a setting defined
during a previous operation may
remain.

To interrupt execution, cancel the
enable mode while the operation is inprogress.
Also, re-connect the aforementioned
option to check the settings, or recall
values from memory address 0, reset
all settings to their initial states, andspecify settings again.

SEL

After a quick change starts,
the change is made morethan once.

Appropriate action and explanation

4.4.1 Quick voltage change(with the frequency unchanged)－QUICK CHANGE－

START

Quick Change) [1]

4.7.2 ES 4474 remoteterminal
4.7.1 ES 4473 interfaceboard

ES 6000W/12000W/18000W

7-6

4.4.1 Quick voltage change(with the frequency unchanged)
4.7.1 ES 4473 interface
board and 4.7.2 ES 4474 remoteterminal
4.3.3 Memory

7.2 When an Error Seems to Have Occurred

Behavior related to quick voltage changes (QC:
Behavior

When a quick change wasmade to increase voltage, adistortion was observed in
the output voltage
waveform immediately
after the start of the quickchange.

Cause or condition

Appropriate action and explanation

The quick change started
Set the enable mode, wait 1 to 2
immediately after theseconds, and then start the operation.
quick-change enable mode was set
4.4.1 Quick voltage change(with the frequency unchanged)
Is the AGC switch set
to ON?

AGC
ON

OFF



Quick Change) [2]

For a quick voltagechange, turn off the switch
so that the AGC function is
not used.
4.5.2 Remotesensing AGC (AC output
mode)

AGC
ON

OFF

Other unusual behavior
Behavior

When external input isused, a sudden increase in
the signal level from 0 V
causes distortion of theoutput voltage waveform
for a short time.

Cause or condition

Response or explanation

Is the allowable output voltage
set?

Set the allowable output voltage.
4.6.1 External input(factory-installed option)

Is the AGC switch set
to ON?

Turn off the switch so that
the AGC function is not
used.
4.5.2 Remotesensing AGC (AC output
mode)

AGC
ON

OFF

ES 6000W/12000W/18000W

7-7

AGC
ON

OFF

8. Supplementary Information
8.1

ES 6000W/12000W/18000W

Terminology ......................................................................... 8-1

8.1 Terminology

8.1

Terminology
Term

AC power supply
AC regulator

Description
Although commercial AC power supplies are widely used in a variety ofdevices that receive power fed through distribution panels, wall outlets, andsubstations from electric power companies' power plants, AC voltages andwaveforms from these power supplies are distorted by the effect of the
impedances and loads of feeders.
At the same time, demand for improved reliability in such commercial power
supplies is growing as the quantification of electronic devices and theirprecision increases.
One solution to this problem is to regulate power at the receiving end. The
conventional methods are use of a saturable reactor and servo-control of a slide
regulator. However, these methods have two significant disadvantages: slow
response speeds and waveforms that cannot be improved. Both methods are nolonger considered practical. Other methods using electronic circuits are being
devised and implemented.
This device uses the power amplifier method. By using a built-in signal
generator, the device can supply stable AC voltage with low distortion, and it
can generate a variety of abnormal phenomena that may occur on commercial
power lines so that the effect of loads can be simulated for low-frequency
immunity tests.

Low-frequency
immunity test

A variety of abnormal phenomena that occur on commercial power lines can begenerated quantitatively to test the robustness of the tested unit against thephenomena.
Robustness against external abnormalities and noise is tested in order toimprove device reliability and safety rather than determine compliance withconventional regulations on noise generated from devices. Examples of such
regulations are regulations on radiation noise in conductors (CISPR, FCC,
VDE, and VCCI) and harmonics regulations (IEC61000-3-2).
In the IEC international standards, this type of test is called an “Immunity test
for low-frequency conducted disturbances,” and its rules are prescribed in the
IEC61000 series of Electromagnetic Compatibility (EMC) standards.
Since 1996, devices exported to the EU have been subject to compulsory
testing; safety tests called CE Marking (based on directives on low voltage andEMC) must be performed on the devices. The sale of any product without a CE
mark, which indicates compliance with the relevant standards, is not permitted.

ES 6000W/12000W/18000W

8-1

8.1 Terminology

Term

Description

Harmonics regulations

A wide variety of devices, from household appliances to industrial
equipment, already use switching power supplies. Capacitor input-type
rectifier circuits are ordinarily used in the power input sections of thesedevices because such circuits are simple and inexpensive. The greatest
drawbacks of this type of circuit are that it largely distorts the power supply
input current and that the current contains a lot of harmonics.
If a large amount of current from such a source flows into a power supply
line, voltage is distorted, possibly causing a device malfunction or atransformer to become excessively hot, either of which could lead to
accidents.
To prevent this problem, groups have been formed to promote quantitative
measurement of harmonics in the input current of devices and to place
restrictions related to the properties of these components.
In the latter half of the 1970s, a movement to promote standardization
started, initiated mainly by groups in European countries. In 1982, theIEC555-2 international standard was released.
In 1992, the standard was included in the IEC1000 series of EMC standards,
and its name was changed to IEC1000-3-2. The standard was later revised
into IEC61000-3-2. Like low-frequency immunity tests, it has been included
since 1996 in directives on EMC in CE Marking.
Based on these standards, the “Guideline for suppressing harmonics inhousehold, electrical, and general-purpose appliances” was issued under the
management of the Agency for Natural Resources and Energy in Japan in
September 1994. Individual industries in Japan have started to adopt theguideline and comply with these voluntary restrictions.
Instantaneous change of the power supply status
A quick change in voltage is called a “quick voltage change,” and a quickchange in frequency is called a “quick frequency change.” This device cangenerate both types of changes.
Similarly, a quick change in phase is called a “quick phase change,” which
may occur during system switching in a commercial power supply. It can begenerated when this device is used with the optional ES 0406 low-frequency
immunity test program.

QC (Quick Change)
Quick change
Quick voltage change
Quick frequency change
Quick phase change

Sweep
Voltage sweep
Frequency sweep

Load regulation

Line regulation

A sweep is a power supply status change made within a certain period (notinstantaneously).
A linear change in time is called a “linear sweep,” and a logarithmic change
is called a “log sweep.”This device can perform linear sweep operations for both voltage andfrequency.
Output voltage variations can be caused by load status changes. Generally,
the percentage (%) of voltage variation observed when a load is connected
to voltage under no load (no load is connected) is displayed.
Output voltage variations can be caused by variations in power supply input
voltage. In this device, a variation in output voltage (at rated output)
compared to a variation in input voltage (170 V to 250 V) is displayed as apercentage (%) and defined as a rating.

ES 6000W/12000W/18000W

8-2

8.1 Terminology

TermApparent power
Active power
Power factor

Description
When power is supplied from an AC power supply to a load, the multiplicationof the absolute values of the load current denoted as IL and the voltage denoted
as VL (IL and VL are both effective values) is expressed as |IL|･|VL|. It is called
apparent power and displayed in [VA].
Of power supplied from a power supply, active power is expressed as follows:v(iL·and vL are instantaneous values.)

Active power is displayed in [W].
The ratio of [W] and [VA] is the power factor.
In other words, apparent power is power that the AC power supply is supposed
to supply, active power is the amount of energy used by the load, and the power
factor is the percentage of supplied power used in the load.
This device obtains values for detected iL, vL, IL, and VL by performing
calculations equivalent to those explained above.
Stability forcapacitive load

Remote sensing

AGC

In an AC power supply consisting of a power amplifier similar to this device,feedback is generated using an electronic circuit to compensate for output
voltage changes caused by load variations. If an excessively large capacitive
load is connected, the stability of the feedback circuit deteriorates, which canlead to abnormal phenomena such as oscillation.
To prevent this problem, this device provides a feedback circuit compensation
mode that can be set when a large capacitive load must be connected
In precision mode, which provides high precision, robustness against acapacitive load is about 20 F; and in high-stability mode, which places anemphasis on stability, a capacitive load of up to 1000 F can be connected.
If the cable connecting the output terminal of an AC power supply to a load
were lengthened, the impedance of the cable would become more significant
for the load, since a voltage drop is generated between output voltage and load
voltage.
When long cables are used, a sensing cable in addition to the power supply
cable is connected to monitor voltage at the load end. This method is generally
called “remote sensing.”
This device allows you to select either an external voltage detection point or aninternal voltage detection point. If the external point is selected, “remotesensing” mode is entered, and voltage detection input from the load end ispossible during the operations of the measurement function and the AGC
function described below.
After detection of an envelope of the absolute values of AC output voltage, theaverage value (DC value) is used to control the output voltage.
Because the control uses a DC value, high voltage stability along with highprecision can be maintained. Also, during detection by remote sensing, thedetection operation is less susceptible to the influence of AC elements (e.g.,
impedance) from the sensing cable.

ES 6000W/12000W/18000W

8-3

8.1 Terminology

TermCapacitor input-type
load

Description
Most of the switching power supplies in many household appliances andindustrial equipment use a capacitor input-type rectifier in their power supply
input section, because this type of rectifier is a simple and inexpensive circuit.
The power supply input current in devices with such circuits have waveforms
in which current flows only near the peak values of a given sine wave voltage.
Not only do the resulting currents contain many harmonics components (see“Harmonics regulations”) but the ratio of peak value to effective value (crest
factor or CF value) can become as large as 1.5 times to twice that of a linear
load (CF = 1.41).
To supply such loads with low-distortion voltage, this device is designed so thatit can supply current for a CF value of up to 3.5 (equivalent to 70 Ap) (per unit,
with a 100-V range, in precision mode).
lin

Vin

Vin
lin
Capacitor input-type load model

GPIB and RS-232

GPIB (general purpose interface bus) is an interface specification that defines
hardware and protocols for data transfer, and it is generally and widely used forcontrolling measuring instruments.
Devices with this interface can be connected in a daisy-chain using GPIB
cables, so multiple devices can be connected to a single interface connector of acontroller (a personal computer is usually used), and an automatic measurement
system can be easily configured.
RS-232, adopted by the Electrical Industries Association (EIA) in the U.S., is a
hardware specification for a serial data transfer interface.
Although the latest specification is EIA-232-F, the specification for this device iscalled RS-232 because both specifications have the same basic specifications andbecause the name RS-232 is more common. Unlike GPIB, this interface isequipped as standard in almost all personal computers, making it so convenientthat only a cable need be prepared for a connection across a distance of several
dozen meters. The interface, however, has the disadvantages of low data transfer
speed and requiring as many interface connectors as the number of devices to beconnected. Therefore, it is considered unsuitable for complicated system
configurations.
This device has the optional ES 4473 interface board, which is equipped withboth types of interfaces so that users can select either one after considering theiradvantages and disadvantages.

ES 6000W/12000W/18000W

8-4

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 returned 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.
sales representative.

Contact the

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.
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Copyright 2008, NF Corporation

ES 6000W / ES 12000W / ES 18000W Instruction Manual

NF Corporation
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223-8508, JAPAN
Phone +81-45-545-8111 Fax +81-45-545-8191