INSTRUCTION MANUALVOLTAGE DIP AND UP SIMULATOR
MODEL

VDS-2002

NOISE LABORATORY CO., LTD.

2.05 Edition
AED00100-00E-1

NOTICE•The contents of this instruction manual (the “Manual”) are subject to change
without prior notice.

•

No part of the Manual may be reproduced or distributed, in any form or by
any means, without the authorization of Noise Laboratory Co., Ltd. (the“Company”).

•

The contents of the Manual have been thoroughly examined. However, if
you find any problems, misprints, or missing information, please feel free tocontact our sales agent who you purchased our product from.

•The Company assumes no responsibility for any loss or damage resulting
from improper usage, failure to follow the Manual, or any repair ormodifications of this product undertaken by a third party other than the
Company or the agent authorized by the Company.

•

The Company assumes no responsibility for any loss or damage resulting
from remodeling or conversion solely undertaken by the user.

•

Please note that the Company cannot be held responsible for any
consequences arising from the use of this product.

•

Product names and business names referred to in the Manual are generally
trademarks or registered trademarks of third parties. Those trademarks havenothing to do with the Company. ® and TM are not always referred to in thismanual.

1. IMPORTANT SAFETY PRECAUTIONS

Thoroughly understand the following precautions before use, as they are important mattersfor handling this unit in safety.

1.

This unit cannot be used in an explosive area, fire prohibited area,etc.

Use of this unit in such an area is liable to cause combustionor ignition.

2.

A person who has a pacemaker on should not operate this unit andalso should not enter the area where it is operating.

3. For connection of supplies to the EUT, be sure to turn of all
relevant supplies (instrument supply, EUT, supplies to EUT)
beforehand and check to see there is no potential at the connectors
and/or terminals you are going to work with. Otherwise, a serious
shock hazard may arise.

4. A number of safety recommendations are listed in "Basic Safety
Precautions" described in Section 5. Be sure to read them before
setting a test environment, connection and starting a test.

1

Memo

2

.

2.

APPLICATION FORM FOR INSTRUCTION MANUAL

We place an order for an instruction manual.
Model:

VDS-2002

Serial No.:
Applicant:Company name:
Address:
Department:
Person in charge:
Tel No.:Fax No.

Cut off this page “APPLICATION FORM FOR INSTRUCTION
MANUAL” from this volume and keep it for future use withcare.
When an INSTRUCTION MANUAL is required, fill in the above Application
Form and mail or fax it to the following sales department of our company.

To: Noise Laboratory Co., Ltd.
1-4-4 Chiyoda Sagamihara City,
Kanagawa Pref., 229-0037 Japan
Tel: +81-(0)42-712-2051
Fax: +81-(0)42-712-2050
Cut
line

3

Memo

4

3. CONTENTS
1.

IMPORTANT SAFETY PRECAUTIONS ..................................................................... 1

2.

APPLICATION FORM FOR INSTRUCTION MANUAL ..................................................... 3

3.

CONTENTS ................................................................................................................ 5

4.

INTRODUCTION ........................................................................................................ 7

5.

BASIC SAFETY PRECAUTIONS ............................................................................... 8
5-1. SYMBOL OF HAZARD ................................................................................................. 8
5-2. IMPORTANT SAFETY PRECAUTIONS ......................................................................... 9
5-3. WHEN WARNING LABEL IS MISSING ....................................................................... 10

6.

FEATURES AND FUNCTIONS ................................................................................ 11
6-1. FEATURES AND FUNCTIONS ................................................................................... 11
6-2. GENERAL OF VDS-2002 ......................................................................................... 127.

APPEARANCE AND FANCTION OF EACH PART .................................................. 14
7-1. FRONT PANEL APPEARANCE .................................................................................. 14
7-2. REAR PANEL APPEARANCE .................................................................................... 15
7-3. CONTROL PANEL .................................................................................................... 16
7-4. EACH PART ON FRONT PANEL ............................................................................... 23
7-5. EACH PART OF REAR PANEL .................................................................................. 24

8.

OPERATION ............................................................................................................ 27
8-1 AC/DC SELECT ..................................................................................................... 27
8-2. EUT INPUT CONNECTION .................................................................................... 27
8-3. EUT OUTPUT CONNECTION ................................................................................ 28
8-4. INSTRUMENT POWER ON/OFF ............................................................................ 28
8-5. HOW TO SET INTERRUPTION TEST ........................................................................ 29
8-6. HOW TO START TEST .............................................................................................. 29
8-7 HOW TO MONITOR OUTPUT VOLTAGE OF BASE VOLTAGE / TEST LEVEL .... 29
8-8. HOW TO SET DIP/UP TEST ..................................................................................... 30
8-9. HOW TO SET SENSING MODE OR DIRECT MODE ................................................... 30
8-10. HOW TO SET VOLTAGE VARIATION TEST............................................................. 31
8-11. HOW TO SET VOLTAGE VARIATION TEST OF IEC61000-4-11 ED2 (2004) .......... 32

9.

SPECIFICATIONS ...................................................................................................... 33
9-1 SPECIFICATIONS ...................................................................................................... 33
9-2 LOCAL / PC OPERATION COMPARISON..................................................................... 35

10. INCLUDED ACCESSORY ........................................................................................... 38
5

11. OPTIONS................................................................................................................... 39
12. ERROR DISPLAY....................................................................................................... 40
13. STANDARD ............................................................................................................... 41
13-1 IEC61000-4-11 STANDARD GENERAL .................................................................. 41
13-2 SCOPE OF IEC61000-4-11 .................................................................................... 41
13-3 GENERAL OF THE TEST.......................................................................................... 41
13-4 VOLTAGE DIP AND SHORT INTERRUPTION TEST OF IEC61000-4-11 (1994) ....... 42
13-5 VOLTAGE DIP AND SHORT INTERRUPTION TEST OF IEC61000-4-11 ED2(2004)/ED 3 (2020)................................................................................................. 42
13-6 VOLTAGE VARIATION TEST OF IEC61000-4-11 (1994) (OPTIONAL) .................... 43
13-7 VOLTAGE VARIATION TEST OF IEC61000-4-11 ED2 (2004) (OPTIONAL)/ED3(2020)(REQUIRED).................................................................................................. 43
13-8 TEST RESULTS AND TEST REPORT ......................................................................... 43
14. WARRANTY .............................................................................................................. 44
SERVICING TERMS ......................................................................................................... 44
LIMITED WARRANTY ...................................................................................................... 45
15. MAINTENANCE ......................................................................................................... 46
16. NOISE LABORATORY SUPPORT NETWORK ............................................................. 47

6

4. INTRODUCTION
We thank you for purchasing the model VDS-2002 Voltage Dip and Up Simulator.
Thoroughly read this manual before installing, setting-up and operating this instrument atfull performance.
A ready made Windows software package is optionally available to remote-control this
instrument test set-ups in a more convenient and extensive manner. When operating this
instrument with this controls software, be sure to refer to the manual for the software
program.
This Instruction Manual will help operators to handle and utilize
the VDS-2002 Voltage Dip and Up Simulator safely.
Keep this Instruction Manual in a place where it is readily
available.
It is optional in the IEC 61000-4-11 Ed2 (2004) voltage variations
test and became required in the modified Ed3 (2020) voltage
variations test.

7

5.

BASIC SAFETY PRECAUTIONS

5-1. Symbol of hazard

It expresses a WARNING.
WARNING indicates a potentially hazardous
situation which, if not avoided, could result indeath or serious injury.

It expresses a DANGER.

indicates an impending dangerous
DANGER 危険 DANGER
condition resulting in a serious injury or death,
if such a condition is not avoided.

It expresses a WARNING.
WARNING indicates a potentially hazardous
situation which, if not avoided,
could result in death or serious injury.

It expresses a CAUTION.
CAUTION indicates a potentially hazardous
situation which, if not avoided, may result inminor or moderate injury.
Indicates components with potentials, which may be hazardous.

Shows that the operator shall refer to the relevant part of this manual.
Indicates the frame ground.

Indicates the protective earth terminal.

8

5-2. Important Safety Precautions
1.

This instrument has a 3-pole AC inlet. Be sure to connect this instrument to an
appropriately grounded AC outlet to a avoid shock hazard. 【Precautions forconnections】

2.

Use a proper AC cord according to the local AC supply voltage. 【Precautions
for connections】

3.

When replacing fuses, use ones with the same blow characteristics and rating.
Before replacement, be sure to disconnect the instrument from AC supplies.
【Precautions for safety】

4.

The PE terminal of the EUT INPUT is independent from the ground conductor of
the 3-pole AC inlet of the instrument supply. When testing for EUT with PE, be
sure to connect the PE terminal of the EUT INPUT to an appropriately grounded
AC supply. 【Precautions for connections】

5.

The EUT and relevant AC supply shall not exceed AC240V 16A. In-rush current
shall be suppressed to <500A (10ms). In the event of a higher value, theinstrument may be damaged. 【Precautions for connections and EUT】

6.

In the event of Error No. 1, be sure to turn off the all-relevant supplies(instrument supply, EUT, supplies to EUT). The instrument turn on shall beallowed only after 2-minutes lapse and after eliminating the cause of theexcessive in-rush current event. Turn-on within 2-minutes will result in a failureof the semiconductor switches in this instrument.

7.

Use proper cables with sufficient voltage and current rating meeting the EUT.
【Precautions for connections and EUT】

8.

For connection of supplies to the EUT, be sure to turn off all relevant supplies(instrument supply, EUT, supplies to EUT) beforehand and check to see there isno potential at the connectors and/or terminals you are going to work with.
Otherwise, a serious shock hazard may arise. 【Precautions for human body andconnection】

9.

Fix the cover before providing power supply when taking off the cover toconnect to the main unit. Otherwise, it should be caused short-circuit orelectrically damaged to the person.【Precautions for connections】

10. This unit is power supply voltage variation unit, which is slider type. Provide
power supply for EUT input, which is lowest voltage variation and distortion
because it will not adjust the waveform.
11. Use the accessories and optional equipment supplied by our company.
【Precautions for human body and connection】
9

12. When connecting a scope probe to the EUT INPUT or EUT OUTPUT, employ anisolation transformer for the scope and further disconnect the ground pin of thescope AC plug from the secondary to avoid short-circuit events. 【Precautions
for connections】
13. Do not open the cover of this instrument since HV potential exist in it.
【Precautions for human body】
14. Do not block the ventilations 【Precautions on installation】
15. Avoid using or storing the unit in high or low temperature environment.
(Operating temperature range: 15 ～35℃/ Operating humidity range: 25～75%)【Precautions for environments】
16. Avoid using this unit in an extremely humid or dusty place. 【Precautions forenvironments】
17. If dewing or condensation occurs, thoroughly dry it before operating the unit.
【Precautions for environments】
18. Do not wipe this unit with thinner, alcohol or similar solvent. When the body is
dirty, soak a cloth in detergent, squeeze the cloth and wipe the body with it.
【Precautions for maintenance】
19. This unit cannot be used in an explosive area, fire prohibited area, etc. Use ofthis unit in such an area is liable to cause combustion or ignition.
【Precautions for human body and environments】
20. Our company and sales agents shall have no responsibility for any accident
resulting in injury or death, any breakage or resultant damages due toirresponsible handling.【Precautions for human body, operation, environments
and connection】
21. Repair, maintenance and internal adjustment of this unit should be performed bya qualified service engineer.【Precautions for handling and safety】
22. This unit is very heavy so it will be needed to install at substantial place. And
when moving the unit, transport with few parsons taking attention to the round.
After moving, fix to the ground holding casters. Otherwise it may be caused
damage to the person by moving and falling down the unit.【Precautions for
installation】

5-3. When warning label is missing
1.

When warning label is lost, or peeled off or dirty, put up a new one for extra safety.

2.

When warning label is lost, contact our company's sales dept. or maintenance dept. forissuance.
106. FEATURES AND FUNCTIONS
The model VDS-2002 can perform voltage dips, interruptions and variations test in a fullycompliant manner with the IEC 61000-4-11 (1994) standard and its edition 2 (2004) /edition
3 (2020). The optional remote control software can expand the variation of the tests for AC
as well as DC voltage interruption test in a more convenient and extensive manner.

6-1. Features and Functions
1.

The automatic control double power supply consisting of two motors and two
slide transformers realizes smooth conducting of voltage variation, interruption
immunity test.

2.

Easy setting for parameters of the tests prescribed in IEC61000-4-11.

3.

Higher inrush current drive capability makes tests for high inrush current
instruments more realistic.

4.

EUT INPUT: AC90V-264V available

5.

EUT OUTPUT: Multi-receptacle for easy connection to EUT.

6.

Floated TRIG OUT for easy waveform observation.

7.

Optional PC remote control software offers more complex and extensive AC
mains voltage simulations and DC interruption test.

8.

The optical interface between VDS-2002 and PC offers stable communication
environment with less noise influence.

9.

Output current capability: 16Arms (continuous), 40Arms within 5 seconds when
output voltage is 40% of input.

10. 500A peak inrush current is available (for 220-240V mains).
11. Base voltage: 100% output of input voltage. Sensing mode (keeping 100%
output of the input voltage in the initial setting) or Direct mode (outputting 100%of the input voltage on that moment) is selectable.
12. Parameter settings available with this instrument (control software not required)
are 0.5, 1, 5, 10, 12, 25, 30, 50, 250, 300 cycles and 10 seconds for voltage
dip/interruption durations, 0, 40, 70, 80 and 120% for test levels.
13. For voltage variations test, transition time from normal to a changed voltage andfrom a changed voltage to the normal is 2s. The changed voltage is for 1s. Testlevels (changed voltages) are 0%, 40%, 70%, 80% and 120% of the EUT supply
voltage.
14. Memory: Can memorize 5 settings (Saved for a certain period time with aninternal backup battery even after power off).
11

6-2. General of VDS-2002
Refer to [Fig 1] on Page 13. With this schematic, the function of each part is being
explained as follows.
■ST11, ST12: Auto slide transformers (parallel driven, 2 outputs) set BASE VOLTAGE(SW1) and TEST LEVEL (SW2).
■POWER OFF, EUT LINE OFF: MG11, MG21, SW1, SW2 open. L1 LINE cut off. L2 LINE
not cut off (If L2 OFF necessary, turn off power supply of EUT input). Connect EUT’s HOT
to L1, COM to L2.
■Fuse: To protect the circuit detecting the input of voltage of the VDS-2002.
■TB16: AC/DC SELECT terminals: Convert AC (DC) to DC (AC) of EUT INPUT by shortbars. Since the short bars and TB16 are part of EUT LINE, they may give you an electric
shock. In position change of the short bars, POWER OFF and disconnect the wholeconnection.
■MG21, MG22: Contactors to switch open mode and short mode when EUT OUTPUT 0V.
The open and short mode will be changeable by the optional remote control software. In
local setting, the mode is fixed to short mode.
The next table shows the contactors status of each mode.
Mode

MG21

MG22

Note

Short Mode

Open

Short

Local setting
PC Remote setting

Open Mode

Open

Open

PC Remote setting

Ordinary

Short

Open

Local setting

Dip / Up Mode

PC Remote setting■SW1, SW2
SW1 ON: BASE VOLTAGE is output to EUT OUTPUT.
SW2 ON: TEST LEVEL is output to EUT OUTPUT.
Both SW1 and SW2 cannot be ON status at the same time. Setting BASE VOLTAGE or
setting TEST LEVEL is output alternatively.
LINE OFF, STOP, POWER OFF: Both SW1 and SW2 are OFF.

12

■Inputting AC through AC EUT INPUT (AC/DC SELECT: All AC)
AC from AC EUT INPUT goes through the circuit protector CP12 and is input to ST11,
ST12 (parallel driven auto slide transformers). The transformers have two outputs which
are automatically controlled respectively. BASE VOLTAGE goes through MG11 and TB16
and is turned ON/OFF by SW1. TEST LEVEL goes through TB16 and MG21 and is turned
ON/OFF by SW2. With switching SW1 and SW2 as setting beforehand, VDS-2002
conducts voltage dip/up and interruption tests. In the interruption test set locally, MG21 isopen and MG22 is short (short mode). The optional remote control software makes openmode and short mode selectable.
■Inputting DC through DC EUT INPUT (AC/DC SELECT: All DC)– With the optional remote control software
DC from DC EUT INPUT goes through the circuit protector CP11 and TB1. The positive (+)
side is connected to SW1 of BASE VOLTAGE and the negative (-) side is directly
connected to the negative of EUT OUTPUT. The type of DC test is just the interruption test.
Therefore SW2 of TEST LEVEL side is 0V. The test is conducted with selecting short modeor open mode. Even though DC voltage is injected to the multi receptacle connected
parallel, the multi receptacle cannot be used in DC tests.

[Fig 1] Schematic of VDS-2002
CP11

MG11

＋

AC/DC SELECT
TB16
SW1

AC

－

EUT OUTPUT

DC

Multi receptacle

CP12

ST11

L1

AC

L2

DC
MG22

PE
ST12

AC
DC

MG21

SW2

AC DC
L1 ＋
L2 －

To InputPE

Voltage
Detection
Circuit

入力電圧検出回路
Fuse to protect
保護用ヒューズ
Voltage Detection
Circuit13

EUT OUTPUT
AC/DC Block
Terminals

7. APPEARANCE AND FANCTION OF EACH PART7-1. Front Panel Appearance①
Controlpanel③
TRIG OUT②

BNC

POWER Key

connector⑤④

EUT OUTPUTEUT OUTPUT

Multi-receptacle

Block terminal⑥
FG
terminal⑦
Serial number
sticker14

7-2. Rear Panel Appearance⑪⑧

Fuses for instrument
supplyFan⑫
AC INPUT⑨
DC EUT INPUT⑬

Block terminals &Fuse for EUT

Circuit protector

supply⑭
AC/DC SELECT
Block terminals⑩
AC EUT INPUT
Block terminals &Circuit protector

⑧
Fan

15

7-3. Control PanelＡ TEST LEVEL/DIP CYCLES display

ＪＤ

SW1 Monitor Key

LINE keyＫ
SW2 Monitor Key

Ｂ
DIP PHASE/INTERVALCYCLES displayＥ
MEMORY NUMBER key

Ｃ
REPEAT COUNT/MEMORY NUMBER
display（TC-815P）
Ｌ
放電ガン
TEST1）LEVELKeyＦREPEAT COUNT key

Ｇ
STA RT

INTERVAL CYCLE key

S TO PＭ
DIP CYCLES key

Ｎ

Ｈ
DIP PHASE KeyREMOTESTART key

Ｉ

Ｏ

Warning lamp

STOP key

Ｐ REMOTE control port

◇ VDS-2002

16

control

Ａ

TEST LEVEL/DIP CYCLES display

Indicates test level (unit: %) or dip cycle (unit: cycle).
*In LINE OFF status
Indicates test level when TEST LEVEL
key is alight.
Indicates dip cycle when DIP CYCLES key
is alight.

*In LINE ON status

LINE ON status(TEST LEVEL key alight)

Indicates dip cycle when DIP CYCLES key is alight. Indicates test level when TESTLEVEL key is alight.

When TEST LEVEL key is alight,
Indicates base voltage when SW1 (BASE VOLTAGE) monitor key is alight.
Indicates test level when SW2 (TEST LEVEL) monitor key is alight.

If TEST LEVEL key is pressed and test level is changed in SW1 monitor key alightstatus, the revised test level is being indicated with blinking for 3 seconds. During thisperiod SW2 monitor key does not turn on, SW1 monitor key keeps alight.

17

B

DIP PHASE/INTERVAL CYCLES display

Indicates dip phase (unit: degree) or interval cycle (unit: cycle or second).
Indicates dip phase when DIP PHASE key is alight.
Indicates interval cycle when INTERVAL CYCLES key is alight.

C

REPEAT COUNT/MEMORY NUMBER display

Indicates repeat count (unit: time) or memory number (1-5).
Indicates repeat count when REPEAT COUNT key is alight.
Indicates memory number when MEMORY NUMBER key is alight.

18

D

LINE key

Turns EUT OUTPUT line on and off. When LINE key is pressed, warning sound informing“EUT OUTPUT LINE ON” starts beeping and I Warning lamp turns on, showing switching
into LINE ON status. BASE VOLTAGE (100% of EUT INPUT voltage) is being output to
EUT OUTPUT.
When LINE key is pressed in LINE ON status, warning sound informing “EUT OUTPUT
LINE OFF” starts beeping and I Warning lamp turns off, showing switching into LINE OFF
status. Even when the test is being started, switching into LINE OFF status is available. In
this case the test is finished forcibly.

E

MEMORY NUMBER key

Used for saving settings, changing them, and switching into local setting from PC remotecontrol setting. When MEMORY NUMBER key is pressed, memory number (1.2Por 5)

and its setting are indicated. Five types of test settings can be saved. When you
change the setting of number 5, press MEMORY NUMBER key until “5” appears on
the display and then set the contents of the test. When the setting is changed,
MOMORY NUMBER key blinks. Press MOMORY NUMBER key longer (than 2seconds) and the contents of the test is being saved under the indicated number.
Beep sound informs the completion of saving. The saved setting can be kept with abackup battery even after turning off the main power.
MEMORY NUMBER key is used for switching from PC remote control setting into local
setting. In PC remote control setting, “PC” is indicated on Ａ TEST LEVEL/DIP CYCLES
display.

F

REPEAT COUNT key

Sets repeating times of dip/up cycle. Eight steps (1, 3, 5, 10, 30, 50, 100, Cnt—repeating
limitlessly) are available.

19

G

INTERVAL CYCLES key

Sets interval cycles for various kinds of tests.
*In voltage dip/up and interruption tests“INTERVAL CYCLES” means the number of cycles from the end of the dip/up cycle tothe beginning of the next dip/up. Refer [Fig 2]. Ten steps of INTERVAL CYCLES —1,
3,5,10, 30, 50, 100, 300, 500 (cycle) and IEC (10 seconds)—are available.
[Fig 2] Case of DIP CYCLE 1 and INTERVAL CYCLE 1

DIP CYCLE
1 CYCLEINTERVALCYCLE
1 CYCLEDIP CYCLE
1 CYCLE**Note: DIP CYCLE 0.5 case is the exception of the above. INTERVAL CYCLE is
including DIP CYCLE.
[Fig 3] Case of DIP CYCLE 0.5 and INTERVAL CYCLE 1

DIP CYCLE
0.5 CYCLESDIP CYCLE
0.5 CYCLESINTERVAL CYCLE
1 CYCLE*In voltage variation tests
In voltage variation tests (Press Ｍ DIP CYCLES key and “vAr” appears on Ａ TESTLEVEL/DIP CYCLES display), the unit of INTERVAL CYCLES becomes second (notcycle). The number more than “100” on BDIP PHASE/INTERVAL CYCLES display
means 100 seconds.

*In voltage variation tests of IEC61000-4-11 Ed.2 (2004) /Ed.3 (2020)
Press Mand “oPt” on A. The unit of INTERVAL CYCLES becomes second. The number

more than “100” on B means 100 seconds, less than “3” on B means 3.
20

It is optional in the IEC 61000-4-11 Ed2 (2004) voltage variations test and became
required in the modified Ed3 (2020) voltage variations test.
“oPt” on A is displayed on both Ed2 (2004) voltage variations test and Ed3 (2020)voltage variations test.

H

DIP PHASE key

Sets dip/up starting phase angle. Nine steps (0°, 45°, 90°, 135°, 180°, 225°, 270°, 315°,360°) are available. In voltage variation tests (“vAr” or “oPt” on A), DIP PHASE key isineffective.

I

Warning lamp
Alight in LINE ON status after pressing D

LINE key.

Blinks TEST START status after pressing N

START key.

While Warning lamp is alight or blinks, voltage is output to EUT OUTPUT. Be careful.

J

SW1 Monitor Key

Monitors BASE VOLTAGE (SW1) and sets sensing mode or direct mode.
*SW1 (BASE VOLTAGE) Monitor
While SW1 Monitor key is alight (LINE ON status), BASE VOLTAGE (SW1) is output to
EUT OUTPUT. BASE VOLTAGE is 100% of EUT INPUT. In this situation, when TESTLEVEL is indicated on Ａ

TEST LEVEL/DIP CYCLES display, “100” is indicated, whichshows BASE VOLTAGE is 100%. During tests SW1 or SW2 Monitor key is alightaccording to DIP and INTERVAL timing set previously to the tests.
*Sensing mode / Direct mode switching
Switches the mode in LINE OFF status by pressing SW1 Monitor key longer (than 2seconds) when TEST LEVEL is indicated.

Sensing mode: Dot is alight.
Direct mode: Dot is not alight.

21

**Sensing mode
In the sensing mode, a feed back circuit works and maintains the output voltage
measured at the instance when the LINE key is pressed. This will minimize
possible voltage changes due to the load (EUT) starting. This function is operative
only in the STOP status. Even if the EUT supply input is switched from, for example,
100v to 240V, this instrument outputs 100V when placed in this mode.
**Direct mode
In the Direct mode, EUT supply input just goes through the instrument with nofeedback. Therefore input voltages changes directly affect the output from the
instrument. So does it for intentional input changeover.

K

SW2 Monitor key

Monitors TEST LEVEL (SW2). In LINE ON status, when switching from SW1 into SW2,TEST LEVEL value (percentage to input voltage value, 0, 40, 70, 80, or 120) is indicatedand the voltage based on the value is output to EUT OUTPUT. During tests SW1 or SW2
Monitor key is alight according to DIP and INTERVAL timing set previously to the tests.

L

TEST LEVEL key

Sets TEST LEVEL (SW2) (0%, 40%, 70%, 80%, or 120%). TEST LEVEL is output when
SW2 monitor key is alight. By pressing TEST LEVEL key, the value on Ａ

TESTLEVEL/DIP CYCLES display changes as “0”, “40”, “70”, “80”, “120”, which indicateschange of setting.
**In the voltage variation test of IEC61000-4-11 Ed2 (2004)/Ed3 (2020), 0% or 40%
setting is to be 50% setting.

M

DIP CYCLES key

Sets dip/up cycle, and switches into the voltage valuation test mode. Twelve steps (0.5, 1,
5, 10, 12, 25, 30, 50, 250, 300 cycles, oPt and vAr) are available. Both “vAr” and “oPt” arefor the voltage variation test mode — “oPt” is for the voltage variation test of
IEC61000-4-11 Ed2 (2004)/Ed3 (2020).
**In LINE ON status, switching between dip/up cycle mode (0.5, 1P) and variation mode
is unavailable (changeable within cycle numbers even in LINE ON status).

N

START key

Starts test. Without turning line on, test cannot be started.

O

STOP keyStops test. Line is still on after this STOP operation.

P

REMOTE control port

Used for connecting to PC by an optical cable. The optional remote control software can
expand the variation of the test.
22

7-4. Each Part on Front Panel② POWER Key
Turns the VDS-2002 on or off. When the instrument is on, MEMORY NO., INTERVALCYCLE and DIP CYCLE lamps are alight and the current settings are shown on therelevant displays. When the instrument is OFF, EUT INPUT LINE cannot be cut offcompletely. Turn off power supply of EUT INPUT for safety –to avoid an electric shock--.

③ TRIG OUT BNC terminal
This terminal outputs TTL signals synchronized with the events of switching between
BASE VOLTAGE and TEST LEVEL.
As the BNC ground is of floating design, LINE voltage and TRIG OUT signals can be
input to your oscilloscope at the same time.
To avoid a short-circuit event, insert an isolation transformer between the oscilloscopeand its AC source. Do not connect the oscilloscope AC plug ground pin to the transformer
secondary.

Low：EUT output isnormal voltage.
Hi ：EUT output is test
voltages either in dip,swell or interruption④ EUT OUTPUT Block terminals
AC and DC output terminals. Check the correct connection according to the L1, L2, PE,+ or – markings. Use proper cables with sufficient current rating meeting the EUT.
These terminals are parallel connected to ⑤EUT OUTPUT multi-receptacle.

23

⑤ EUT OUTPUT multi-receptacle
Multi-receptacle dedicatedly to be used for AC output only. Use proper cables with
sufficient current rating meeting the EUT. Never connect a load exceeding the
instrument rating of AC290V/16A. As these receptacles are parallel connected to ④
EUT OUTPUT Block terminals, DC voltages can be present. But do not use thesereceptacles for testing with DC.

L2

L1

PE

PE

L1

L2

⑥ FG terminal
Chassis ground of the instrument⑦ Serial number sticker
The serial number of the instrument is shown.

7-5. Each Part of Rear Panel⑧ Fan
Ventilation to cool the internal circuit. Do not block air outlet.

⑨ DC EUT INPUT circuit protector (upper) and terminals (lower)(**For DC test, the optional PC remote control software and opt-link set isnecessary.)
To input DC for the EUT, switch the relevant short-bars (3 pieces) to the DC side on⑭ AC/DC SELECT terminals.
*Do not input AC to ⑩AC EUT INPUT at the same time.
Circuit protector (upper) (CP11)
Lifting the lever turns on the DC EUT LINE. In case of an over-current, this protector
functions and cuts the DC EUT LINE. Before turning on the LINE, eliminate thecause of the over-current event.
Terminals (lower)
DC EUT input terminal. Check the correct connection according to the + and markings. Use proper cables with sufficient voltage and current rating meeting the
EUT.
*Use a DC supply with over-current protection circuitry to avoid a failure of the24

supply.

⑩ AC EUT INPUT circuit protector (upper) and terminals (lower)
To input AC for the EUT, switch the relevant short-bars (3 pieces) to the AC side on⑭AC/DC SELECT terminals.
Do not input DC to ⑨ DC EUT INPUT at the same time.
Circuit protector (upper) (CP12)
Lifting the lever turns on the AC EUT LINE. In case of an over-current, this protector
functions and cuts the AC EUT LINE. Before turning on the LINE, eliminate thecause of the over-current event.
Terminals (lower)
AC EUT input terminal. The hot side of the EUT supply shall be connected to the L1
and the cold side shall be connected to the L2. Check the correct connections. PE
terminal is for the EUT earth connection and separated from the PE of 11 AC INPUT.
Use proper cables with sufficient voltage and current rating meeting the EUT.
*An AC source with less distortion and output voltage variation is a better choice. An
excessive level of distortion and variation may result in incorrect output (test) voltage
from the instrument.

⑪ Fuses for instrument supply
Fuses for the VDS-2002 mains supply blow out in the event of an over-current andother abnormality. Immediately turn off all the related power inputs (the instrument,
EUT, LINE) and disconnect the associated cables and investigate the cause of theblowout. Only the specified fuse of 250V M 3A (M: slow/medium) can be used as areplacement. When the instrument failure is suspected, consult the Noise
Laboratory’s distributor.

⑫ AC INPUT
AC input for this instrument. Operate it on the correct voltage range of AC100V～
240V. User a proper cord according to local supply voltage. Operation without earth
connection is forbidden.

⑬ Fuse for input voltage detection circuit of the instrument
This fuse blows out in the event of an abnormality. Immediately turn off all the
related power inputs (the instrument, EUT, LINE) and disconnect the associatedcables and investigate the cause of the blowout. Only the specified fuse of 250V M
1A (M: slow/medium) can be used as a replacement. When the instrument failure issuspected, consult the Noise Laboratory’s distributor.

25

⑭ AC/DC SELECT terminals
These terminals are provided to offer selection between ⑨ DC EUT INPUT and ⑩
AC EUT INPUT terminals. For selection, switch the 3 short-bars to either AC or DC.
When AC is selected, input AC supplies to ⑩AC EUT INPUT. When DC is selected,
input DC supplies to ⑨DC EUT INPUT.
*Never input to these two supply inputs at the same time.
*When selecting AC or DC, move short bars in no residual electricity status.

26

8. OPERATION
8-1 AC/DC SELECT
Select DC or AC and check 3 pieces of short bars are fixed firmly to your desirable position(AC or DC). If they are not on your desirable position, confirm there is no residual electricity,
disconnect all connections, move and fix them firmly to your desirable position.

8-2. EUT INPUT Connection
Connect EUT power supply (AC or DC) to AC EUT INPUT or DC EUT INPUT.
*AC EUT INPUT: Connect the hot side of EUT power supply to L1 and the cold side to L2.
Make sure the connection right and electrify it. Connect PE if necessary.
*DC EUT INPUT: Use a DC supply with over-current protection circuitry to avoid a failureof the supply. Make sure the connection right and electrify it.
*Never input to these two supply inputs at the same time.

27

8-3. EUT OUTPUT Connection
EUT OUTPUT Block terminal and EUT OUTPUT Multi-receptacle are connected in parallel.
*AC EUT OUTPUT: Select Block terminal or Multi-receptacle according to convenience of
EUT. Do not use Block terminal and Multi-receptacle at the same time. If EUT current
capability is exceeding 16A, use Block terminal (Multi-receptacle unavailable).
When using Block terminal, make sure the connection (L1-the hot side, L2-the cold side,and PE) right and electrify it.
*DC EUT OUTPUT: Use Block terminal (Multi-receptacle unavailable). Make sure theconnection right and electrify it.

8-4. Instrument POWER ON/OFF
Pressing the | side of the POWER key on the front panel turns on the instrument. Whenthe instrument is on, MEMORY NO., INTERVAL CYCLE and DIP CYCLE lamps arealight and the current settings are shown on the relevant displays.
Pressing the ○ side of the POWER key on the front panel turns off the instrument.
When the instrument is off, all lamps and displays are off.

OFF→

←ON

28

8-5. How to Set Interruption Test
When the instrument turned on, the default values and indications are as follows.
Key

Default Value

Key’s Light and Indication

TEST LEVEL

0% Sensing modeNot alight / No indication

DIP CYCLES

0.5 cycles

Alight / “0.5” on Ａ

DIP PHASE

0°

Not alight / No indication

INTERVAL CYCLES

10s

Alight / “IEC” on Ｂ

REPEAT COUNT

3 times

Not alight / No indication

MEMORY NUMBER

1

Alight / “1” on Ｃ

LINE

OFF

-

SW1

OFF

Alight / No indication

SW2

OFF

Alight / No indication

For interruption test, set 0% for TEST LEVEL. As for other parameters, set them according
to your test contents.

When the INTERVAL CYCLES display
shows “IEC”, voltage dip or variation tests
are

done

at

10

seconds

intervalirrespective of the frequency of the EUT
supply input.

8-6. How to Start Test
Press LINE key to make the instrument LINE ON status. Warning sound beeping, theautomatic slide transformer sets BASE VOLTAGE. In LINE ON status, SW1 Monitor key
and Warning lamp are alight.
Press START key to start test. When test starts, Warning lamp starts blinking, whichshows conducting a test.
During test, switching operation between SW1 (BASE VOLTAGE) and SW2 (TESTLEVEL) can be observed. Either SW1 or SW2 lamp is alight, showing which iselectrified.
When test completes, Warning lamp becomes alight again, showing LINE ON status.

8-7 How to Monitor OUTPUT Voltage of BASE VOLTAGE / TEST LEVELIn LINE ON status, BASE VOLTAGE (SW1) is usually output to EUT OUTPUT with SW1
key alight. Pressing SW2 key makes TEST LEVEL (SW2) output to EUT OUTPUT. With
this operation both BASE VOLTAGE and TEST LEVEL can be monitored.

29

8-8. How to Set Dip/Up Test
Press TEST LEVEL key and set it. The example, setting 40%, is as below.

Select TEST LEVEL from 0%, 40%, 70%, 80%, and 120% and set it. As for otherparameters, select and set them according to your test contents. The table below shows
selectable parameters and their available values.
Parameter (Key)TEST LEVELDIP CYCLESDIP PHASE
INTERVAL CYCLESREPEAT COUNTMEMORY NUMBER

Settable Values
0%, 40%, 70%, 80%, 120%
0.5, 1, 5, 10, 12, 25, 30, 50, 250, 300 cycles
0°, 45°, 90°, 135°, 180°, 225°, 270°, 315°, 360°
1,3,5,10,30,50,100,300,500 cycles and IEC (10 seconds)
1, 3, 5, 10, 30, 50, 100 times and Cnt—repeating limitlessly
1, 2, 3, 4, 5

8-9. How to Set Sensing Mode or Direct ModeIn the initial screen, a dot is alight at the lower right of Ａ TEST LEVEL/DIP CYCLES
display, showing the instrument in sensing mode status. Pressing SW1 Monitor key
longer (than 2 seconds) when TEST LEVEL is indicated in LINE OFF status switches themode one another.

Sensing mode: Dot is alight.
Direct mode: Dot is not alight.

30

**Sensing mode
In the sensing mode, a feed back circuit works and maintains the output voltage
measured at the instance when the LINE key is pressed. This will minimize possible
voltage changes due to the load (EUT) starting. This function is operative only in the
STOP status. Even if the EUT supply input is switched from, for example, 100v to240V, this instrument outputs 100V when placed in this mode.
**Direct mode
In the Direct mode, EUT supply input just goes through the instrument with nofeedback therefore input voltages changes directly affect the output from the
instrument. So does it for intentional input changeover.

8-10. How to Set Voltage Variation Test
Press DIP CYCLES key times until “vAr” appears on DIP CYCLES display, whichindicates voltage variation test mode selected. The screen as below shows the voltage
variation mode status.

Voltage dips and short interruption test, output voltage varies from 100% of the rated
voltage to 0%, 50%, 70%, 80% or 120% of abruptly and returns to the rated voltage for
0.5 seconds. The 0.5 seconds are fixed values. The table below shows selectableparameters and their available value.
Parameter (Key)
Settable Values
TEST LEVEL
0%, 40%, 70%, 80%, 120%
DIP CYCLES
Indicate “vAr”
INTERVAL CYCLES
1,3,5,10,30,50,100s and IEC (10s)
REPEAT COUNT
1,3,5,10,30,50,100 times and Cnt
MEMORY NUMBER
1, 2, 3, 4, 5**Setting DIP PHASE is ineffective.
**Setting Direct mode is ineffective (Always Sensing mode).

31

Note

“300””500” are 100s

8-11. How to Set Voltage Variation Test of IEC61000-4-11 Ed2 (2004)
Press DIP CYCLES key times until “oPt” appears on DIP CYCLE display, which indicatesthe voltage variation (optional) test mode (for IEC61000-4-11 Ed2/Ed3) selected. The
screen as below shows the voltage variation (optional/required) mode status.

In the voltage variation test, output voltage varies from 100% of the rated voltage to 40%,
70%, or 120% of it for 2 seconds and keeps the reduced value for 1 second, and returns
to the rated voltage for 2 seconds. The above 2, 1, 2 seconds are fixed values. The tablebelow shows selectable parameters and their available value.
Parameter (Key)TEST LEVELDIP CYCLES

Settable Values
70%, 80%, 120%
Indicate “oPt”

INTERVAL CYCLES

3,5,10,30,50,100s and IEC (10s)

REPEAT COUNT
1,3,5,10,30,50,100 times and Cnt
MEMORY NUMBER
1, 2, 3, 4, 5**Setting DIP PHASE is ineffective.
**Setting Direct mode is ineffective (Always Sensing mode).

32

Note
“0””40” are 50%
Ed2 (2004) is optional
Ed3 (2020) is required“300””500” are 100s
“1” is 3s

9. SPECIFICATIONS
9-1 Specifications
Parameters

Specifications

Remarks

Compliant standard
Number of lines
Test mode
Interruption
AC/DC

IEC 61000-4-11 (1994)(2004)(2020)
Single phase
Synchronous
PC/local
Short circuit
AsynchronousPC
Synchronous/Asynchronous PC
Open circuit
Synchronous
PC/localAsynchronousPC
Asynchronous
PC/Local
Only 2s-1s-2s standard
defined test available inlocal mode
AC 90 - 264V, 50/60 Hz
DC 0- 125V
AC 0V - 120% of input voltage
DC 0V - input voltage
4.224kVA
16A rms
20A rms
23A rms
40A rms
16A
>250A
>500A

At 0-100%

Dip and swell
Variation

Input voltage range
Output voltage range
Output VA
Outputcurrent
capability

AC100% of input voltage
80% of input voltage
70% of input voltage
40% of input voltage

DC
Peak inrush current drive
capability

AC 100-120V
AC 220 - 240V

Load regulation

100% of input voltage
0 –16A rms
80% of input voltage
0 –20A rms
70% of input voltage
0 –23A rms
40% of input voltage
0 –40A rms
Overshoot / undershoot<5%

Rise time/fall time
BASE
Setting by
VOLTAGE
percent(Normal voltage
setting)
Setting by
voltageAccuracy
TEST LEVEL
Setting by(Dip/Swell level) percent

PC

1 - 5 uS
(4%) -120%

Local
PC

100%
10V - 290V

PC

+/-5V
Short/Open selectable for 0%(interruption)

Local

Repetition of
eventsSetting by
voltageAccuracy
No. of events

PC

PC
Local

**3
AC 290 V max**2Continuous
Continuous
<5S
<5S
<5S
Continuous
at 100% output,
in the Direct mode
<10ms

<5%

<5%
<5%
<5%

100 ohm loadedin the Sensing
and CHANGE
modes
100 ohm loaded
10V
minimum*1, *2**1
5V step

0 -120%

Short circuit for 0%
0/40/70/80/120%(interruption) setting
Short/Open selectable for 0V
0-290V (0-120%)(interruption)+/-5V
1 - 1000 or continuous
1, 3, 5, 10, 30, 50, 100 or continuous
33

0-16A output**1
5 steps
5V step**1
0-16A output
1 event step
8 stepsInterval cycle

Setting by cycle
Settingbytime

Dip cycle

Dip phase(Starting phaseangle of events)

Setting for
short
duration

Synchronous
Synchronous
Asynchronous

0.5- 5000.5 cycles
1,3,5,10,30,50,100,300,500 cycles, 10s
1-100s

0.5 cycle step
10 steps
1s step

10ms - 100s (50Hz)
8.3ms – 100s (60Hz)

0.1 ms step

1s - 10h

1s step

0.01 cycle step

Setting forlongduration
Setting by cycle

AsynchronousSynchronous

PC

0.01 – 5000 cycles

Local

0.5, 1, 5, 10, 12, 25, 30, 50, 250,300cycles

10 steps

Settingby timeSynchronous
AsynchronousAsynchronousPC

0.1ms – 100s

0.1ms step

0.1 ms-100s

0.1ms step

1s - 10h

１ s step

Synchronous

PC

0 – 360 degrees

1 degree stepLocal

0, 45, 90, 135, 180, 225, 270, 315, 360°

9 steps（45 degrees
step）
0.1ms step

Settingfor short
duration

Setting
for long
duration
Setting by phase
angle

Setting by time
Voltage variation
test

PC
Local
PC

Settingby time

Changing timePC
Asynchr
onous

PC

Chang
ed timeInterval
Test level
MemoryEquipment input
External interface
Operating temperature
Operating humidity
Dimensions
Weight

PC
Local
PC

0- 19.9 ms for 50Hz
0 -16.6 ms for 60Hz
0.1s - 10 s
at least 0.1s required for 10% change of
input

0.1s step0 – 10s

0.1s step0 – 100s

0.1s step0 – 120%
5 tests
10 steps

Test
sequencing of
up to 10 steps
when
controlled byPC

AC100-115V/200-240V±10%, 50/60Hz, 120VA
optical RS-232
15-35℃
25-75%R.H. (No dewing)(W)430×(H)745×(D)600mm(projection excluded)
Approx.150 kgs.

**1 ：percent against input voltage**2 ：For >100% voltage output, the instrument specifications are to be exemptedfrom IEC 61000-4-11(1994), IEC 61000-4-11 Ed(2004) and IEC 61000-4-11
Ed(2020)**3 ：No distortion or voltage variation shall not be allowed for AC source (EUT supply
input)

34

9-2 Local / PC operation comparison
The following table shows the comparison between the parameters settings available
with this instrument only (local) and those which can be programmed on an optional
Windows control software.
9-2-1 Voltage dip/short interruptions/swell
Parameters

VDS-2002

Remote control by PC

EUT voltage

100％ fix

1V to 120% of input

Test level0, 40, 70, 80, 120% of input

0v to 120% of input

OV status

Fixed to low impedance

Low or high impedance selectable

DIP start phase

0°to 315°at a step of 45°plus

0°to 360°at a step of 1°

angle

360°

DIP start setting

Not selectable

0.1ms to time equivalent to 360°by time
DIP cycle

DIP duration

0.5, 1, 5, 10, 12, 25, 30, 50, 250, 0.01 to 5000 cycles at a step of 0.01
300 cycles

cycle

Not selectable

0.1ms to duration equipment to5000 cycles

Setting by time
Interval

1,3,5,10,30,50,100,300,500

0.5 to 5000.5 cycles or 1s to 100 s

cycles, 10s
Repetition of

1,3,5,10,30,50,100 events oreventscontinuous

Test sequencing

Not available

1 to 1000 events or continuous

Up to 10 tests

35

9-2-2 Voltage variation test
Parameters

VDS-2002

Remote control by PC

EUT voltage

100％ fixed

1V to 120% of input

Test level0, 40, 70, 80, 120% of input

0V to 120% of input

Voltage fall time

2s fixed

0.1 to 10s

Time for1s fixed

0 to 10s

2s fixed

0.1 to 10s

Interval

1,3,5,10,30,50,100s

1 to 100s

Repetition of

1,3,5,10,30,50,100 events or

1to 1000 events or continuous

eventscontinuous

Test sequencing

Not available

changed voltage
Voltage increasetime

Up to 10 steps

9-2-3 Voltage Variation Test described in IEC61000-4-11 Ed2 (2004)/Ed3 (2020)
Parameters

VDS-2002

Remote control by PC

EUT voltage

100％ fixed

1V to 120% of input

Test level50, 70, 80, 120% of input

50%-120% of input

Voltage increase

0.5s fixed

0.1 to 0.5s

timeInterval

0.1s step (10% per 0.1s)
3,5,10,30,50,100s

3 to 100s
0.1s step

Repetition of

1,3,5,10,30,50,100 events oreventscontinuous

Test sequencing

Not available

1to 1000 events or continuous

Up to 10 steps

36

9-2-4 DC interruption test
Parameters

VDS-2002

Remote control by PC

Availability

No

Yes

Interval---

0.5ms to 100000.0ms or
1 to 36000s

Duration of---

0.1ms to 100000.0ms orinterruption
Repetition of

1to 36000s---

1 to 1000 events or continuous---

Up to 10 steps

eventsTest sequencing※ Remote control software is optionally available.
※ The above table shows the full range of each setting. Some combinations are notavailable.

3710. INCLUDED ACCESSORY
AC cord 1 piece.

AC cord38

11. OPTIONS
Remote Control Software 14-00029A

Optical Conversion Adaptor (Set) 07-00017A

Optical Modem

AC Adaptor

Optical Cable (5m)

USB Optical Conversion Unit 07-00022A
Main Unit

Optical Cable (5m)

CD

Instruction
Manual39

12. ERROR DISPLAY
When the input or output voltage or current exceeds the instrument ratings or over voltage
or over current protection circuit functions, the following error number is shown.
Error No.

Meaning1

In-rush current over 500A flowed to the EUT ※1

2

Current over 40A flowed to the EUT.

3

16A or higher current flowed for 5s or a longer period.

4

During the test, EUT supply voltages dropped.

5

Input voltage to the EUT input exceeded the limit of this
instrument

6

Output voltages to the EUT exceeded the limit of this
instrument

7

Frequency of the EUT supply input was outside of the rangeof the instrument

In the event of any of the above errors, turn off the instrument supply and EUT supply first.
Turn on again only after eliminating the cause of the error.
※1

In the event of Error No. 1, be sure to turn off the all-relevant supplies(instrument supply, EUT, supplies to EUT). The instrument turn on shall beallowed only after 2-minute lapse and after eliminating the cause of theexcessive in-rush current event.
Turn-on within 2 minute will result in a failure of the semiconductor switches
in this instrument.

40

13. STANDARD
13-1 IEC61000-4-11 Standard General
IEC 61000-4-11 standard defines immunity test to voltage dips, short interruptions andvoltage variations. The latest edition (the 3nd edition) was issued in January 2020 (The
1st edition was issued in June 1994 and the 2nd edition was issued in March 2004.).

13-2 Scope of IEC61000-4-11
The standard applies to electrical and electronic equipment having a rated input
current not exceeding 16A per phase, for connection to 50Hz or 60Hz AC networks(not applying to equipment for connection to 400Hz AC networks).

13-3 General of the test
Voltage dips and short interruptions are caused by faults in the network, in installations
or by an abrupt large change of load. They are not always caused by one factor and incertain cases two or more consecutive dips and interruptions may occur. The
phenomena may cause great damage occasionally.
Voltage variations are caused by continuously varying loads connected to the network.
The phenomena can be characterized in terms of deviation from the rated voltage andduration. Falls of mains voltage are not always abrupt. If large mains networks are
disconnected (no matter whether local within a plant or wide area within a region), thevoltage will only decrease gradually due to the many rotating machines, which areconnected to the mains networks, because for a short period the rotating machines will
operate as generators sending power into the network.
Some instruments are more sensitive to gradual variation of voltage rather than abruptchange. Most data-processing equipment has built-in power-fail detectors to protect
and save the data. Some power-fail detectors will react sufficiently fast on a gradualdecrease of mains voltage. Therefore the DC voltage to integrated circuits will
decrease to a level below the minimum operative voltage before the power-faildetector is activated. That will result loss of data and the data processing equipment
cannot restart correctly even after the recovery of the mains voltage. Unfortunately,
these kinds of phenomena of voltage variation are substantially unsteady and it isdifficult to define them.
Consequently the IEC61000-4-11 standard specifies tests to simulate the effects ofabrupt change of voltage, and for the reasons explained above it also specifies anoptional test Ed2 (2004)／required test Ed3 (2020) for gradual voltage change.

41

13-4 Voltage Dip and Short Interruption Test of IEC61000-4-11 (1994)
A voltage dip is a sudden reduction of the voltage below a specified voltage thresholdfollowed by its restoration after a short period, typically between half a cycles to a few
seconds. A short interruption is a special kind of dips with no AC mains voltage (0V).
This standard uses the rated voltages of the equipment under test as a basis forvoltage test level specifications. Three test levels are defined: 0% (interruption), 40%
and 70%. The table below shows test levels and durations in period.
Test level

Voltage dip and short

Duration (in period)

interruption
0%

100%

40%

60%

70%

30%

0.5 cycle
1
5
10
25
50
X (open)

One or more of the above test levels and durations may be chosen. For 0.5 period
duration, tests shall be repeated with the dip starting phase angle of 0 degree and 180
degrees. The standard requires 3 repetitions of a dip with interval of 10s.

13-5 Voltage Dip and Short Interruption Test of IEC61000-4-11 Ed2(2004)/Ed 3 (2020)
When the standard revised in 2004, one more test level was added. Four test levels
are defined in the edition 2: 0% (interruption), 40%, 70% and 80%. The table below
shows test levels and durations in period.
Class

Test Level and Duration (50Hz/60Hz)
For Voltage Dips

Interruptions
Can prescribe according to the equipment requirement

Class 1
Class 2

Class 3For Short0%during1/2
cycle
0%
during
1/2
cycle

0%
during 1
cycle
0%
during 1
cycle

70% during
25/30 cycles

40% during 70%
10/12
duringcycles25/30
cycles0% during
250/300
cycles
80% during
250/300
cycles0% during
250/300
cycles“25/30 cycles” means “25 cycles for 50Hz test” and “30 cycles for 60Hz test”.
Class 1 test is specified for electrical or electronic apparatus intended for use inprotected power supply environments (for example, laboratories), Class 2 for genericcommercial products intended for use in residential, commercial, and light industrial
environments, Class 3 for the apparatus intended for use in industrial environments.

42

13-6 Voltage Variation Test of IEC61000-4-11 (1994) (Optional)
Voltage variations are gradual change of voltage, typically, in second unit.
Two kinds of variation test are specified: changing from 100% to 40% of the rated
voltage and from 100% to 0%. The decreasing time is 2 seconds, the time at reduced
voltage is 1 second, and the increasing time to the rated voltage is 2 seconds. The
table below shows test levels and durations in period.
Voltage Test Level

Time for

Time at Reduced

Time for(Output voltage when

Decreasing

Voltage

Increasing

reduced)Voltage40%

2 seconds ±20%

1 second ±20%

2 seconds ±20%

0%

2 seconds ±20%

1 second ±20%

2 seconds ±20%

Voltage13-7 Voltage Variation Test of IEC61000-4-11 Ed2 (2004) (Optional)/Ed3(2020)(required)
The variation test of the edition 2 is specified as the test of abrupt falling and gradual
recovering. It is described that the voltage change to 70% of the rated voltage(100%→70%) abruptly, keep the reduced value for 1 cycle, and return to the rated
voltage for 0.5 seconds. The table below shows test levels and durations in period.
Test Level

Time for

Time at Reduced

Time for

Decreasing

Voltage

Increasing

Voltage70%

Voltage

Abrupt1 cycle25/30 cycles

13-8 Test results and test report
The test results shall be classified on the basis of the operating conditions and functional
specifications of the equipment under test during or after testing.
The test results can be classified into the following:a) Normal performance within the specification limit.
b) Temporary degradation or loss of function or performance, which isself-recoverable.
c) Temporary degradation or loss of function or performance, which requires operator
intervention or system reset.
d) Degradation or loss of function, which is not recoverable due to damage ofequipment (component) or software, or loss of data.
EUT shall not become dangerous or unsafe as a result of the application of thetest defined in this standard.

4314. WARRANTY
Servicing terms
The following terms are applicable to servicing by Noise Laboratory Co., Ltd., (hereafterreferred to as the Company) provided to maintain the intended performance of its products.
1. Scope
The following terms shall apply only to products made by the Company.
2. Technical servicing fee
In the event of a failure of a product within the warranty period (see warranty section),
the Company will repair a product without charge. After the warranty expires, repairs
will be billed at a nominal cost.
3. Ownership of defective parts
Any defective part exchanged under the Company’s servicing belongs to it.
4. Limited liability
In the event that damages resulting from servicing by the Company are intentional or
caused by negligence, the Company will pay the cost but at the purchase value of therelevant product maximum. But, notwithstanding the foregoing, the Company shall not
be responsible for any incidental or consequential damages of any nature, including
without limitation thereof loss of would-be profit or compensation demanded from athird party
5. Refusal to offer servicing
The company may not accept a repair order in the following cases:
More than 5 years have passed since manufacture of a product discontinued
More than 8 years have passed after delivery
Repair part for a custom-made product is not available due to discontinued
production on the supplier and there is no equivalent available.
Product changed, repaired or remodeled without obtaining a prior permission fromthe Company.
Product which lost its original form

44

Limited warranty
Noise Laboratory Co., Ltd. (hereafter referred to as the Company) warrants its products tobe free from defects in materials and workmanship under normal use and service for aperiod of one year from date of delivery. In the event of failure of a product covered by thiswarranty, the Company will repair the product or may, at its option, replace it in lieu of
repair without charge.
Not withstanding the foregoing, the Company shall not be responsible for any incidental orconsequential damages of any nature, including without limitation thereof loss of would-be
profit or compensation demanded from a third party. This warranty is valid only in Japan.
1. Scope
This warranty shall only apply to products made by the Company.
2. Period
One year from date of delivery. The warranty may be valid in 6 months after
servicing if the same failure on the same component has repeated.
3. Exclusions
The followings are exclusions from this warranty:
Consumable parts (including HV relay)
Failure caused by misuse, neglect, accident or abnormal conditions of operation
Failure caused by remodeling on the user side without prior permission from theCompany
Failure caused by servicing by unauthorized personnel by the Company
Failure due to fore majeure including but not limited to, acts of God, fire, war, riot,
rebellion and others
Failure due to shock or drop in or after transit
Failure due to operation in environment being out of ambient specifications.
A unit shipped to overseas.

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15. MAINTENANCE

1.

When repair, maintenance or internal adjustment of the unit is required, a qualified
service engineer takes charge of such work.

2.

Maintenance on the user side is restricted to the outside cleaning and functional
check of the unit.

3.

When replacing the fuses, turn off the switch of this unit and the connected
equipment and disconnect the plug socket beforehand.

4.

When cleaning the unit, turn off the switch of this unit and the connected equipment
and disconnect the plug socket beforehand.

5.

Avoid using chemicals for cleaning. Otherwise, the coating of the unit may peel off or
the sight glass may be broken.

6.

Do not open the cover of this unit.

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16. NOISE LABORATORY SUPPORT NETWORK
If a symptom which seems a trouble is found, inform the model name andserial number of the product together with the symptom to Noise Laboratory or
your nearest sales agent of Noise Laboratory.
When the product is returned to Noise Laboratory, write the state of the trouble,
contents of your request, mode name and serial number in a repair order, andpack the product and repair order sheet in the former package of equivalent
suitable for transit and send them back.

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NOISE LABORATORY CO., LTD.
1-4-4, Chiyoda, Chuo-ku, Sagamihara City, Kanagawa Pref., 252-0237, Japan
TEL: +81-(0)42-712-2051 FAX: +81-(0)42-712-2050
URL: http://www.noiseken.co.jp
Printed in Japan