Kikusui PAD-LA Series User manual

Part No. Z1-002-712, I0041001
May 2021
OPERATION MANUAL
Regulated DC Power Supply
PAD-LA Series
TYPE III
PAD 16 -100LA PAD 36 -60LA
PAD 60 -35LA PAD 72 -30LA
PAD 110 -20LA PAD 250 -8LA
TYPE IV
PAD 36-100LA PAD 60 -60LA
PAD110-32LA PAD250-15LA

Use of Operation Manual
Please read through and understand this Operation Manual before operating the product. After reading,
always keep the manual nearby so that you may refer to it as needed. When moving the product to another
location, be sure to bring the manual as well.
If you find any incorrectly arranged or missing pages in this manual, they will be replaced. If the manual it
gets lost or soiled, a new copy can be provided for a fee. In either case, please contact Kikusui distributor/
agent, and provide the “Kikusui Part No.” given on the cover.
This manual has been prepared with the utmost care; however, if you have any questions, or note any errors
or omissions, please contact Kikusui distributor/agent.
Reproduction and reprinting of this operation manual, whole or partially, without our permission is prohib-
ited.
Both unit specifications and manual contents are subject to change without notice.
Copyright© 2002 Kikusui Electronics Corporation
Printed in Japan.

Power Requirements of this Product
Power requirements of this product have been changed and the relevant sections of the Operation
Manual should be revised accordingly.
(Revision should be applied to items indicated by a check mark )
Input voltage
The input voltage of this product is Vac,
and the voltage range is to Vac. Use the product within this range only.
Input fuse
The rating of this product's input fuse is A, Vac, and .
Power cord
Possible electric shock.
• Before attempting to check or replace the fuse, be sure to turn the
POWER switch off and removing the plug of power cord from an
outlet or turn off the circuit breaker of switchboard.
• Use a fuse element having a shape, rating, and characteristics
suitable for this product.
The attachment of a plug of power cord or crimp-style terminals must
be carried out by qualified personnel.
The product is provided with power cords described below. If the power cord has no plug, attach a
plug or crimp-style terminals to the power cord in accordance with the wire colors specified in the
drawing.
Blue (NEUTRAL )
Brown (LIVE)
Green/Yellow (GND)
White (NEUTRAL)
Black (LIVE)
Green or Green/Yellow (GND)
Kikusui agents can provide you with suitable power cord.
For further information, contact Kikusui distributor/agent.
NEMA5-15 CEE7/7 GB1002
Without a plug Without a plug
Plug for Europe
Plug for USA Plug for China
Provided by Kikusui distributor/agent
JISC8303
2P plug
WARNING
WARNING
PAD-LA I

II PAD-LA

PAD-LA Safety Symbols III
For the safe use and safe maintenance of this product, the followingsym-
bols are used throughout this manual and on the product. Understand the
meanings of the symbols and observe the instructions they indicate (the
choice of symbols used depends on the products).
Indicates an imminently hazardous situation which, if ignored,
will result in death or serious injury.
Indicates that a high voltage (over 1000 V) is used here. Touch-
ing the part causes a possibly fatal electric shock. If physical
contact is required by your work, start work only after you make
sure that no voltage is output here.
Indicates a potentially hazardous situation which, if ignored,
could result in death or serious injury.
Indicates a potentially hazardous situation which, if ignored, may
result in damage to the product and other property.
Shows that the act indicated is prohibited.
Is placed before the sign “DANGER,” “WARNING,” or “CAU-
TION” to emphasize these. When this symbol is marked on the
product, see the relevant sections in this manual.
Indicates a protective conductor terminal.
Indicates a chassis(frame) terminal.
OR
WARNING
CAUTION
DANGER
Safety Symbols

IV Safety Precautions PAD-LA
Safety Precautions
The followingsafety precautions must be observed to avoid fire hazard, electrical
shock, accidents, and other failures. Keep them in mind and make sure that all of
them are observed properly. Usingthe product in a manner that is not specified in
this manual may impair the protection functions provided by the product.
Users
• This product must be used only by qualified personnel who understand the con-
tents of this operation manual.
• If it is handled by disqualified personnel, personal injury may result. Be sure to han-
dle it under supervision of qualified personnel (those who have electrical knowl-
edge.)
• This product is not designed or manufactured for general home or consumer use.
Purposes of use
• Do not use the product for purposes other than those described in the operation
manual.
Input power
• Use the product with the specified input power voltage.
• For applying power, use the AC power cord provided. Note that the provided power
cord is not use with some products that can switch among different input power
voltages or use 100 V and 200 V without switching between them. In such a case,
use an appropriate power cord.
Fuse
• With products with a fuse holder on the exterior surface, the fuse can be replaced
with a new one. When replacing a fuse, use the one which has appropriate shape,
ratings, and specifications.
Cover
• There are parts inside the product which may cause physical hazards. Do not
remove the external cover.
Operation
Manual
Line
Voltage

PAD-LA Safety Precautions V
Installation
• When installing products be sure to observe "Installation" described in this man-
ual.
• To avoid electrical shock, connect the protective ground terminal to electrical
ground (safety ground).
• When connecting the AC power cord to a switchboard, be sure work is performed
by a qualified and licensed electrician or is conducted under the direction of such
a person.
• When installing products with casters, be sure to lock the casters.
Relocation
• Turn off the power switch and then disconnect all cables when relocating the
product.
• Use two or more persons when relocating the product which weights more than
20 kg. The weight of the products can be found on the rear panel of the product
and/or in this operation manual.
• Use extra precautions such as using more people when relocating into or out of
present locations including inclines or steps. Also handle carefully when relocat-
ing tall products as they can fall over easily.
• Be sure the operation manual be included when the product is relocated.
Operation
• Check that the AC input voltage setting and the fuse rating are satisfied and that
there is no abnormality on the surface of the AC power cord. Be sure to unplug
the AC power cord or stop applying power before checking.
• If any abnormality or failure is detected in the products, stop using it immediately.
Unplug the AC power cord or disconnect the AC power cord from the switch-
board. Be careful not to allow the product to be used before it is completely
repaired.
• For output wiring or load cables, use connection cables with larger current capac-
ity.
• Do not disassemble or modify the product. If it must be modified, contact Kikusui
distributor/agent.
Maintenance and checking
• To avoid electrical shock, be absolutely sure to unplug the AC power cord or stop
applying power before performing maintenance or checking.
• Do not remove the cover when performing maintenance or checking.
• To maintain performance and safe operation of the product, it is recommended
that periodic maintenance, checking, cleaning, and calibration be performed.
Service
• Internal service is to be done by Kikusui service engineers. If the product must be
adjusted or repaired, contact Kikusui distributor/agent.
Check?

VI Arrangement of this manual PAD-LA
Arrangement of this manual
This Operation Manual is made up of the following sections.
Preface
Provides a brief descriptions of the product and specifies its features.
Chapter 1 Setup
This chapter describes the necessary procedure from unpacking to preparation
before use.
Chapter 2 Before Usingthe Power Supply
Before using the power supply, users are requested to thoroughly understand the fol-
lowing matters.
Chapter 3 Basic Operation
This chapter describes the basic operations that you can perform from the front
panel.
Chapter 4 Application Operation
This chapter describes remote sensing, external output control, parallel operation,
and series operation using the control terminal block on the rear panel.
Chapter 5 Names and Functions of Controls
This chapter describes the names and functions of switches, displays, terminals, and
other parts of the front panel and rear panel.
Read this chapter to learn about the details of the (alert) marks
inscribed on the panel.
Chapter 6 Maintenance
This chapter describes maintenance and calibration of the power supply. It also
describes troubleshooting measures when you suspect a malfunction in the power
supply.
Chapter 7 Specifications
This chapter describes the electrical and mechanical specifications of the product.
!

PAD-LA Contents VII
Contents
Safety Symbols ____________________________________________ III
Safety Precautions _________________________________________ IV
Preface _________________________________________________ P-1
Chapter 1 Setup _________________________________________ 1-1
1.1 Checking the Package Contents - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-2
1.2 Precautions Concerning Installation Location - - - - - - - - - - - - - - - - - - - 1-4
1.3 Precautions When Moving the Power Supply - - - - - - - - - - - - - - - - - - - 1-7
1.4 Connecting the Power Cord - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-8
1.5 Grounding - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-10
Chapter 2 Before Using the Power Supply _____________________ 2-1
2.1 Inrush Current - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-2
2.2 Voltage of Negative Polarity - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-2
2.3 Load - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-2
2.3.1 When the Load Current Has Peaks or Is Pulse-shaped - - - - - - - - 2-3
2.3.2 When the Load Generates a Reverse Current to the Power Supply 2-3
2.3.3 When the Load Has Accumulated Energy such as Batteries - - - - - 2-4
2.4 CV Power Supply and CC Power Supply - - - - - - - - - - - - - - - - - - - - - - 2-5
2.5 Protective Circuit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-7
2.6 Output Terminal Isolation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-8
Chapter 3 Basic Operation _________________________________ 3-1
3.1 Turning On the Power - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-2
3.2 Basic Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-4
3.2.1 Setting the OVP (Overvoltage Protection) and OCP (Overcurrent Protec-
tion) Trip Points - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-4
3.2.2 Using the Power Supply as a Constant Voltage Power Supply - - - 3-7
3.2.3 Using the Power Supply as a Constant Current Power Supply - - - 3-8
3.3 Connecting the Load - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-9
3.3.1 Load Wire - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-9
3.3.2 Connecting to the Output Terminals - - - - - - - - - - - - - - - - - - - 3-10
3.4 Fixing the Output Setting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-13
Chapter 4 Application Operation_____________________________ 4-1
4.1 Remote Sensing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-2
4.2 Control Terminal Block - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-5
4.3 Analog Remote Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-8
4.3.1 Connection and Setup for Output Voltage Control Using an External Re-
sistor (CV-R) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-10
4.3.2 Connection and Setup for Output Voltage Control Using an External
Voltage (CV-V) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-12

VIII Contents PAD-LA
4.3.3 Connection and Setup for Output Current Control Using an External Re-
sistor (CC-R) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-16
4.3.4 Connection and Setup for Output Current Control Using an External Volt-
age (CC-V) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-18
4.3.5 Connection and Setup for OUTPUT ON/OFF Control Using an External
Contact - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-22
4.3.6 Connection and Setup for Output Shutdown (TRIP) Control Using an Ex-
ternal Contact - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-25
4.4 Master-Slave Parallel Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-26
4.5 Master-Slave Series Operation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4-33
4.6 External Monitoring of the Output - - - - - - - - - - - - - - - - - - - - - - - - - - 4-40
Chapter 5 Names and Functions of Controls ___________________ 5-1
5.1 Front Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-2
5.2 Rear Panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5-6
Chapter 6 Maintenance____________________________________ 6-1
6.1 Cleaning - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-2
6.1.1 Cleaning the Panels - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-2
6.1.2 Cleaning the Dust Filter - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-2
6.2 Inspection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-4
6.3 Adjustment - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-4
6.3.1 Test Equipment Required - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-4
6.3.2 Environment - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-4
6.3.3 Adjustment Procedure - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-5
6.4 Malfunctions and Causes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6-10
Chapter 7 Specifications ___________________________________ 7-1
7.1 Specifications of Type III model - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-2
7.2 Specifications of Type IV model - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7-8
Index ___________________________________________________ I- 1

PAD-LA Preface P-1
Preface
About This Manual
This manual covers the following products.
Product Overview
The PAD-LA series is a regulated DC power supply with a constant voltage/current
automatic crossover function utilizing a switching regulator system. The series reg-
ulator system equipped with phase-control preregulators achieves stable output with
small amount of noise. The power supply can be used in a wide range of applica-
tions including use in the laboratory for experiment equipment, for tests on mass
production lines, and for aging tests.
Features
Performance
• Improved power factor at rated output. The adoption of the choke input smooth-
ing circuit enables operation using smaller input apparent power as compared to
the capacitor input smoothing circuit.
• Standard transient response of 50 μs. Enables the handling of drastic changes in
the load.
• Rated voltage characteristics of 50 ppm/°C (typ), a low temperature drift.
Functions
• Built-in overvoltage protection (OVP) circuit and overcurrent protection (OCP).
The function can be set at 10 % to 110 % of the rated output. It protects a load
from unexpectedly high voltage or current.
• Displays the output voltage and output current. Uses LED monitor with high
visibility.
• Fine control of the output setting. Uses a wire wound variable resistor with 10
rotations for setting the voltage and the current.
• Remote control of the output voltage and output current. The output voltage or
current is controlled using an external voltage or external resistance. In the
remote control using an external voltage, the knob on the front panel can be used
to vary the output.
• Equipped with a sensing function. Enables compensation for the voltage drop of
the wire to which the load is connected.
TYPE III
•PAD16-100LA •PAD36-60LA •PAD72-30LA
•PAD60-35LA •PAD110-20LA •PAD250-8LA
TYPE IV
•PAD36-100LA •PAD60-60LA •PAD110-32LA
•PAD250-15LA

P-2 Preface PAD-LA
• Covers can be attached to the output terminals for safety.
• Supports systemization such as automatic testing equipment. The PAD-LA
power supply is used in conjunction with Kikusui's PIA4810 Power Supply
Controllers.
• Since the PAD-LA series power supplies use a phase control circuit for the prereg-
ulator, pulse-shaped noise is superimposed on the output signal. The noise level is
suppressed to few hundred mV, but this may constitute a problem depending on
the application. Please take this into consideration before using the power supply.
Rack mountingoption of the type III model
The following rack mounting options are available.
Table P-1 Rack mounting option
• Since the PAD-LA type III model have intake ports for forced air cooling, blank
panels must be installed when the power supplies are rack mounted. See Fig. P-2.
For details, contact your Kikusui agent or distributor.
Fig.P-1 Bracket installation example of the type III model
Inch rack
EIA standard
Milli rack
JIS standard Notes
Bracket KRB5-PAD KRB250-PAD
Blank panel BP191 BP1H 1U, plate type
BP191-M BP1H-M 1U, mesh type
NOTE
NOTE
37.5 133.5 50
221
480.8
461.5
24.5
249
24.5
200
478.8
458.8
Unit: mm
KRB250-PAD bracketKRB5-PAD bracket

PAD-LA Preface P-3
Fig. P-2 Blank panel installation example
When one power supply is rack mounted When two power supplies are rack mounted
*1: 1U; JIS standard: 50 mm, EIA standard: 44.45 mm
Required blank
panel width
*1
1U or
greater
1U or
greater
1U or
greater
Blank panel
BP191(-M)
BP1H(-M)
Blank panel
BP191(-M)
BP1H(-M)
Blank panel
BP191(-M)
BP1H(-M)

P-4 Preface PAD-LA
Rack mountingoption of the type IV model
The following rack mounting options are available.
Table P-2 Rack mounting option
• The PAD-LA type IV model, it is not necessary to install blank panels when the
power supplies are rack mounted.
For details, contact your Kikusui agent or distributor.
Fig.P-1 Bracket installation example of the type IV model
Inch rack
EIA standard
Milli rack
JIS standard Notes
Bracket KRB11-PAD KRB500-PAD
NOTE
481.5
461.5
13337.5 121
488
146
459.5
479.5
24.5 150 150 100
499
Bracket KRB11-PAD Bracket
KRB500-PAD
Unit: mm

PAD-LA Setup 1-1
Chapter 1 Setup
This chapter describes the necessary procedure from unpacking to preparation
before use.
1
1

1-2 Setup PAD-LA
1.1 Checkingthe Package Contents
When you receive the product, check that all accessories are included and that the
accessories have not been damaged during transportation.
If any of the accessories are damaged or missing, contact your Kikusui agent or dis-
tributor.
The Type III model includes the followingaccessories.
Fig.1-1 Accessories (Type III model)
Guard cap (2 pcs.)
GP01-PMC [83130]
Operation manual (1 pc.)
Weight sticker (1 pc.)
[A8-000-009]
(Attach the sticker in a location where it is
easil
y
visible as necessar
y
.)
Do not attach the sticker
where the intake and exhaust
ports of the power supply will
be obstructed.
Power cord (1 pc.)
[85-10-0730]
CAUTION

PAD-LA Setup 1-3
The Type IV model includes the followingaccessories.
Fig. 1-2 Accessories (Type IV model)
Guard cap (2 pcs.)
GP01-PMC [83130]
Operation manual (1 pc.)
Weight sticker (1 pc.)
[A8-000-017]
(Attach the sticker in a location where it is
easily visible as necessary.)
Power cord (1 set)
[91-87-6316]
Cable clamper (1 set)
Do not attach the sticker
where the intake and exhaust
ports of the power supply will
be obstructed.
CAUTION
100
[D6-000-006]
[R3-000-005]
[D6-000-007]
M3 screw 2pcs.
[M3-011-031]
M4 screw 2 pcs.
[M3-011-091]

1-4 Setup PAD-LA
1.2 Precautions ConcerningInstallation
Location
Be sure to observe the following precautions when installing the power supply.
■Do not use the power supply in a flammable atmosphere.
To prevent the possibility of explosion or fire, do not use the power supply near alcohol,
thinner or other combustible materials, or in an atmosphere containing such vapors.
■Avoid locations where the power supply is exposed to high
temperature or direct sunlight.
Do not place the power supply near a heater or in areas subject to drastic tempera-
ture changes.
Operating temperature range: 0 to 40 °C
Storage temperature range: -10 °C to +60 °C
■Avoid humid environments.
Do not place the power supply in high-humidity locations--near a boiler, humidifier,
or water supply.
Operating humidity range: 10 % to 90 % RH (no condensation)
Storage humidity range: 0 to 90 % RH (no condensation)
Condensation may occur even within the operating humidity range. In such case, do
not use the power supply until the condensation dries up completely.
■Do not place the power supply in a corrosive atmosphere.
Do not install the power supply in a corrosive atmosphere or in environments containing sul-
furic acid mist, etc. This may cause corrosion of various conductors and bad contacts of con-
nectors inside the power supply leading to malfunction and failure, or in the worst case, a fire.
However, operation in such environments may be possible through alteration. If you wish to
use the power supply in such environments, consult your Kikusui agent or distributor.
■Do not place the power supply in a dusty location.
Accumulation of dust can lead to electric shock or fire.
■Do not use the power supply where ventilation is poor.
The power supply employs a forced air cooling system. Air is taken in from intake
ports located on panels other than the rear panel and exhausted from the ports on the
rear panel. Secure adequate space around the power supply to prevent the possibility
of fire caused by accumulation of heat.
■Do not place objects on the power supply.
Placing objects on top of the power supply can cause failures (especially heavy objects).
■Do not place the product on an inclined surface or location
subject to vibrations.
The power supply may fall or tip over causing damages and injuries.

PAD-LA Setup 1-5
■Do not use the power supply in a location subject to strong
magnetic or electric fields.
The power supply may malfunction and cause electric shock or fire.
■Do not use the product near highly sensitive measuring
instruments or transceivers.
The noise generated by the power supply may affect them.
When fixingthe power supply at the installation location
Casters are attached to the bottom of the power supply allowing you to move it with
small force. To prevent moving the power supply inadvertently during use, fix the
power supply in place using the stopper.
Usingthe Stopper of Type III model
1. Using a spanner turn nut 1 (M10) that is attached to the stopper axis
and lower the nut position.
2. Using a spanner, turn nut 2 (M10) so that the bottom of the stopper is in
contact with the installation surface.
3. Turn nut 1 to fix the stopper position.
Fig. 1-3
Nut 1 (M10)Nut 2 (M10)
Stopper

1-6 Setup PAD-LA
Usingthe Stopper of Type IV model
1. Fixing stoppers are attached to the front caster on bottom. Moving
down strongly fixing stoppers with your foot toward the ON until stop.
• These Stoppers are temporary. When fix certainly, power supplies are rack
mounted
For details, see Page P-4 "Rack mounting option of the type IV model".
Fig. 1-4
NOTE
ONON
V
CVCV
A
CC
VOLTAGE
CURRENT
REGUL ATED DC POW ER SUPPLY
0--36V 100A PA D36
--
100 L A
OUTPUT
ON
OFF
OUTPUT
I
OVP OCP
SET
CV--OFS CV-- FSC VM-- FSC
OVP
CC--OFS CC --FSC IM-- FSC
OCP
CV--VCV
--R
ON
OFF
OFF-MODE
B
A
CC--VCC
--R
I
R-MODE M S
MASTER
SLAVE
POWER
Fixing stopper