KEISOKU GIKEN Co., Ltd.

High capacity, multi-function, fast current response

Large capacity DC electronic load

QL-D series■ A single unit can handle 2000A■ Maximum power 150 kW（6 units in parallel operation）■ Maximum slew rate 50A/µs

New Generation

Large capacity DC electronic load

QL-D series

25kW(23U)

20kW(19U)

The "QL-D Series" capacitive DC electronic load is an electronic load device with enhanced usability and

15kW(15U)

basic electronic load performance, employing Oscilloscope-like UI and high-speed current control

technology that have been well-received in previous electronic load products. The basic specifications,performance, and concept of the conventional 34000A series have been further evolved, and a sweep
function with various load modes and an MPPT function as an option are available to meet all needs with a10kW(1 1U)variety of functions.

The lineup is expandable up to 25 kW in 5 kW increments and up to 150 kW in a maximum of 6 parallel
units. 19-inch rack size and 5 U (height).

The 19-inch rack size and 5U height (5kW model) provide a compact chassis.

Up to 25kW in 5 kW increments
Total lineup of 17 types

5kW(5U)

Large capacity in a compact body. Three models (150V, 600V,
1000V) with different rated voltages from 5kW minimum to 25kW

maximum are available. 150V type can handle high current up to

2000A. Recommended for those who want high capacity at low
cost.

■ 150V typeModel
QL-D-5K-1/B
QL-D-5K-1
QL-D-10K-1
QL-D-15K-1
QL-D-20K-1■ 600V typeModel
QL-D-5K-6/B
QL-D-5K-6
QL-D-10K-6
QL-D-15K-6
QL-D-20K-6
QL-D-25K-6■ 1000Vタイプ
Model
QL-D-5K-1K/B
QL-D-5K-1K
QL-D-10K-1K
QL-D-15K-1K
QL-D-20K-1K
QL-D-25K-1K

2

Rated voltage

150V

Rated current
500A
500A
1000A
1500A
2000A

Rated power
5kW
5kW
10kW
15kW
20kW

Size
5U
5U
11U
15U
19U

Maximum slew rate

50A/μs* QL-D-5K-1/B is bench-top type. All other types are castor type.
* Size excludes casters and rubber feet.

Rated voltage

600V

Rated current
350A
350A
700A
1050A
1400A
1750A

Rated power
5kW
5kW
10kW
15kW
20kW
25kW

Size
5U
5U
11U
15U
19U
23U

Maximum slew rate

20A/μs* QL-D-5K-6/B is bench-top type. All other types are castor type.
* Size excludes casters and rubber feet.

Rated voltage

1000V

Rated current
200A
200A
400A
600A
800A
1000A

Rated power
5kW
5kW
10kW
15kW
20kW
25kW

Size
5U
5U
11U
15U
19U
23U

Maximum slew rate

12A/μs* QL-D-5K-1K/B is bench-top type. All other types are castor type.
* Size excludes casters and rubber feet.

● Improved usability with LCD color UI for the Load Station series● Electronic loads with fast current control technology and no overshoot（Industry's first[based on
our research]. Guaranteed specifications for rising current range）● No concept of minimum operating voltage, linear stable operation even in low voltage range● Equipped with sequence function; program can be saved/loaded via USB memory● Equipped with Sweep mode, supporting functions such as IV characteristics, over-power andover-current tests, etc. Data logging is also available and can be recorded on USB memory.（CSV
format）● Optional MPPT (maximum power tracking) mode for PV exposure testing and PCS simulation● Measurement of elapsed time/accumulated current/accumulated power and cut-off function by
any value● In dynamic mode, current rise/fall times can be set independently. Up to 32 steps can be set.
Complex current simulations (e.g., overshoot current) can be handled.
● LAN/USB/RS-232C standard (GP-IB optional)● CC, CV, and CP as external control modes; CC+CV and CP+CV also available for external control● Capable of superimposing sine and square waves at up to 100 kHz● Up to 6 units can be connected in parallel (150 kW), and different models can be connected (samevoltage models only)3

Significant evolution from previous products in

Version up

terms of design concept,
basic specifications, and performanceElectronic load in comparison

The "QL-D Series" has been updated to broadly cover the specifications and performance of the equivalent conventional product,the "34000A Series.

■ 34000A Series：34105A■ QL-D Series：QL-D-5K-1(60V/1000A/5kW)

4(150V/500A/5kW)

Three large LCDs

Front indicator

3.5-inch color LCD

Numeric keypad and function keys

Control button

Oscillo-like inverted L-shaped button

647(W)×573(H)×766(D)mm

Dimensions

430(W)×322(H)×629(D)mm

0.284㎡

Volume0.087㎡

100kg

Weight35kg

Overcurrent/overpower/short test
Execution by dedicated test keys

Test function

Sweep function in CC.CR.CP mode
Run-time graph display function

CC+UVP Mode
CP+UVP Mode
Discharge time setting mode

Discharge mode
(Cut-oﬀ function)

Load OFF Timer/Speciﬁed voltage setting
Integral current setting/integral power setting
Corresponding to each load mode

With 9 ﬁle/16 step
150 groups can be saved
Resolution 100msec～9.9s
CC/CR/CV/CP mode supported

Sequence function

Number of Steps：4096 point
Resolution：1ms～100hcount 65535, inﬁnite
CC/CR/CV/CP mode supported

2ch ﬁxed
15A/μs(150V type)

Dynamic Mode
Slew rate

32ch
50A/μs(150V type)

20μs

Minimum load response time

5μs

Unsupported

Support for USB memory devices

Data can be saved to USB memory

Unsupported

Integral measurement function

Totalized current/Totalized power/
Elapsed time

Unsupported

Limit function

Current Limit

Current monitor (non-isolated)

Monitor function

Voltage and current monitor (isolated)

Optional GP-IB/USB
RS-232C/LAN implementation

Interface

Standard：USB/RS-232C/LAN
Option：GP-IB

Remote operation only

MPPT mode added

Factory Options
Panel operation/remote operation supported
Real-time measurement display

Deepening

Further deepening high-speed current control toenable response to all external factors.

Uses high-speed current control technology

High-capacity test environments are affected by the inductance of load cables, which can lead to damage of electronic load

devices depending on how they are used. In order to cope with such external factors, the high-speed current control circuit
method used in the Load Station series has been further deepened and adopted in the QL-D series.

The new system speeds up the load response, ensures stable operation of overcurrent at high currents, and prevents abnormal

oscillation caused by cable inductance when the cable wiring length is extended, thus enabling safer and more reliable use without
damaging the DUT (DUT under test).

■ Inrush current - EUT output in Load ON state in CC mode OFF → ON
General large-capacity DC electronic load
(conventional circuit method)

QL-D series(high-speed current circuit method)

expansion
Inrush current occurs

Ideal current response with no inrush current■ Overshoot current - Load OFF → ON with EUT output ON
General large-capacity DC electronic load
(conventional circuit method)

Overshoot current occurs

QL-D series(high-speed current circuit method)

Smooth current response5Evolution

To meet every need,―Mode, Feature

A wide variety of new functions

Improved operability

The operation panel, which imitates the front part of a typical oscilloscope, handles everything from hardware settings tomeasurement mode and numerical settings. The panel is designed for ease of use.

①

3

②
③
④

When the voltage becomes the specified voltage while discharging in CC or CP mode, it shifts to CV mode, which is a discharge

mode that protects the battery without discharging it below the specified voltage. It can also operate with external analog
control.

CC+CV mode operation image

Easy-to-read 3.5-inch large color LCD

Oscillo-like inverted L-sequence keys can also

⑤ Large rotary knob for easy up/down of current

+

VM

CV

⑥

10-degree sloped key tops for ease of⑦

Self-illuminated load ON/OFF button

operation

7

measurement errors in various load modes are smaller, and accuracy isguaranteed for both setting and measurement accuracy.

Master device
Slave device

Load current

Dynamic, Sequence, Sweep, MPPT (optional), Current Limit), which can be combined for a wide variety of load tests.

Operation Mode
6

Dynamic

Sequence
Sweep

MPPT mode

Current Limit

CR

CV

CP

CC+CV

CP+CV

EXT CCEXT CV

EXT CP

EXT
CC+CV

EXT
CP+CV

SHORT

◯

◯

◯

◯

―

―

―

―

―

―

―

―

◯
◯
◯
◯

◯
◯
―
◯

◯
―
―
◯

◯
◯
―
◯

―
―
―
◯

◯
―
―
―
◯

◯
―
―
―
◯

CC mode

◯
―
―
―
◯

◯
―
―
―
◯

◯
―
―
―
◯

◯
―
―
―
◯

CP Setpoint

◯
―
―
―
◯

LOAD OFF at the set
time.

Battery
voltage

Battery voltage

Battery voltage

Load modes supported
CC, CR, CP, EXT CC, EXT CP

Load modes supported
CC, CR, CP, EXT CC, EXT
CP■ Function Utilization 2: LOAD OFF

Load current

CC modeSet time

Time

Operation image when setting discharge time (in CC mode)

Using the totalizing function (current: AH and power: WH), a function is provided to turn LOAD OFF when the specified
totalizing value is reached.
VoltageCC◯

When the speciﬁed voltage
is reached LOAD OFF

Operation image at specified voltage setting (in CC mode)

It has 12 load modes (CC, CR, CV, CP, Short, CC+CV, CP+CV, EX(CC, CV, CP), EXT(CC+CV, CP+CV)) and 6 operation modes (Normal,

◯

P

0

Voltage

Time

Supports up to 36 modes of testing by combining load and operating modes◯

Current varies
Voltage is constantCP

CC set value

Speciﬁed
voltage

Slave device◯CVor at a specified discharge time to protect the battery.

Master-Slave systemload mode

CV set value

DC InputA

0

Battery
voltage＞－

Current is constantPower varies

CV modeOperation

The specified voltage setting function and elapsed time measurement function can be used to turn LOAD OFF at a specified voltage

Integrated model

capacity. Compared to the master-slave method, both setting and+

VM

Voltage

Current measurement accuracy of 0.2% is achieved despite the large◯

Current varies
Voltage is constantCC

CP modeOperation

Current is constantVoltage varies■ Functional Application 1: Battery Protection

Guaranteed accuracy of each load control mode

NormalV

CC modeOperation

CV modeOperation

CV set value

DC Input

－

value
2

CP+CV mode operation image

Vbe used as numeric keypad for numerical input

6

1

One-touch memory function for recalling set■ "CC+CV mode" and "CC+CP mode" are standard

values54Data storage by USB memory stick

Optimal operating modes for battery characterization are included as standard

LOAD OFF when the speciﬁed
totalizer value is reached

Battery
voltage

Load voltage

productload current

CC modeLoad modes supported CC,
CR, CP, EXT CC, EXT CP

Time

7

Evolution

To meet every need,―Mode, Feature

A wide variety of new functions■ Function Utilization 3: Current Limit Function

An independent current limit function, different from the load mode control, is provided. When a set current is detected, the load
can be limited to 110% of the set limit (current) with the load ON, without turning the load OFF. The operation at the time of limit
detection (Load OFF or 110% limit load with Load ON) can be set respectively. This function can be used as a protection function
at any limit value.

Fast response slew rate up to 50A/µs, minimum load response time 5µs

From high-speed current control technology, a high-speed response of up to 50 A/ μ s (150 V type) is realized. The minimum load
response time is 5 µs, realizing fast start-up despite the large capacity and high current.

■ Set current at maximum slew rate
Load current
300A

Load current

Load current can be set
arbitrarily during CV
operation

Limit current:
approximately 110%

In case of 34105A

Minimum load response time is 20 μ s. Therefore, when the maximum slew rate is set to 15
A/ μ s, the maximum slew rate rise is possible at the set current of 15 A x 20 = 300 A.

250A

In case of QL-D-5k-1

Minimum load response time is 5 µs. Therefore, when the maximum slew rate is set at 50 A/

Current limit
Setting valueTimeµs, rise time at the maximum slew rate is possible at the set current of 50 A x 5 = 250 A.

5us
20us

CC モードCV setting value■ Difference in current response at a slew rate of 10A/ μ s at minimum response time

Load terminal voltage

Load current
200A

CV + Clim mode operation (constant voltage / constant current operation)■ Function utilization 4: Constant voltage/constant voltage mode (CV+Clim function)

50A

In constant voltage mode, the CV+Clim function enables operation at 110% of the current limit setting value at the set CV voltage
by using the current limit together. This function can be used as a constant voltage/constant current mode that can be used forbattery discharge, etc.

In case of QL-D-5k-1

50A current change per 5μ s *Minimum load response time of 5μ s

5us

Voltage
Battery voltage

CV setting voltage■ Current rise at maximum slew rate of 50A/µs (when QL-D-5K-1 is used)

Battery voltage

Load current

90%

Clim limited at approximately
110% of set current

A dischargeable current ﬂows
through a lithium-ion battery

500A

Load current

CC モードTime
Image of operation during discharge (conventional CV
operation)

8200A current change per 20μ s *Minimum load response time of 20μ s

20us

Voltage
CV setting voltage

Time

In case of 34105A

Rise time
Approx. 10μsec

TimeImage of operation during discharge (CV+Clim operation)

10%

0A

*In general, the slew rate is the rate of change in time and current that the load current varies from 10% to 90% of its maximum value.

9Evolution

To meet every need,―Mode, Feature

A wide variety of new functions

32-step Dynamic mode for fine current waveform setting and 1μ s minimum pulse width

Equipped with sequence function

In addition to the general 2-step (HIGH/LOW, binary) dynamic mode, 32-step Dynamic operation is available. This mode supports

The 4,096-word memory for sequence operation allows sequence programs to be created by data transfer or directly from thecan be set for either time or period (frequency display). Pulse width can be set from 1μ s, and frequency can be set up to 500kHz(CSV file format).（The execution time and slew rate settings for each step are the same. The execution time is in the range of 1

testing with more detailed current waveforms. The current waveform can be set graphically on the color LCD, and the operation(not including rise/fall time).

Setting items

The current value, time,and slew rate can be set byviewing a graph that is
updated in real time.

■ Condition: Number of Dynamic mode steps
For the 34000A series

Contents

Operation Mode

CC/CR/CV/CP

Slew rate（A/μs）

0.5A ～ 50A/μs(150V)

Number of Steps

32ch

Minimum Time Width

1μs

Set frequency range(approximate)front panel. Data can be transferred from various communication interfaces, and can also be read and saved from USB memory
msec to 10 min, and the slew rate setting is the speed of current change (A/ μ s) when transitioning from step to step in CC mode
only.

Setting steps1

Setting steps2

Setting
steps2048
設定ステップ
2048

Current

Current
Only repeat 2 steps

⑧

⑨
⑮
⑩
⑭
⑪⑬

⑯

Operation Mode

CC/CR/CV/CP

Maximum number of steps

4096

Slew rate（A/μs）

Load
setting

Load Response time
settingLoadsetting

16 steps can be repeated

⑦
⑥
⑤
④
③
②
①

Number of program
repetitions

1 to 65535 or infinity

Time resolution

1ms

Step execution timeTime

Sweep mode is a function that allows voltage and current

measurements to be made while changing the load current inthree load modes (CC, CR, CP) in detail (sweep), and the

Measure voltage and current while
sweeping the load current andfor charting (graph).
Operating waveform for 16 steps

rise time

For QL-D series (high-speed current control circuit method)
Load current

150us pulse
width

Load current

SW operation up to
3.33 KHz

Time

10

1us pulse
widthOvercurrent characteristic test (droop characteristic) andoverpower characteristic test for SW power supplies and I-Vcharacteristic test for rechargeable batteries, etc. can be

performed with a single electronic load. Measurement data canbe saved in USB memory in CSV format.

Since it has a judgment function, it can be used as a test mode

Setting items

1us pulsewidth

150us pulse
widthMeasurement results can bechecked at any point using theencoder and saved to USB memory.
Sweep CR mode
execution example(Example: Overcurrent
characteristic test)

addition to characteristic evaluation.

fall time

Load current

create a graph.

for OCP and OPP in the same way as the 34000A series, inrise time

fall time

1ms ～ 100h

Sweep mode with Chart display on LCD panel

measurement results are plotted on the LCD panel in real time

Load current

CC mode only

Response time

Load current

Time

For the 34000A series

1⑫Load current■ Condition: Dynamic mode pulse width

Contents

Number of programs

0.0083Hz ～ 500kHz

For QL-D series (high-speed current control circuit method)

Setting items

SW operation up to500 KHzTime

Sweep operation mode
Step execution time

Judgment values can also be set.
In addition to various characteristic

Contents

tests, it can also be used for

CC/CR/CP

200ms or 1000ms

overcurrent tests (OCP) andoverpower tests (OPP).
Sweep CR Mode
Determination(Example: Overcurrent
characteristic test)11

Evolution

To meet every need,―Mode, Feature

A wide variety of new functions

MPPT (Maximum Power Point Tracking) function is available as a factory-installed option

Equipped with external analog and digital controls ideal for PLC control

MPPT function (mountain climbing method) required for testing solar panels (PV), etc., is prepared as an option. This is a control

External digital control (EXT I/O) and external analog control (EXT INPUT) are

obtained.

with 0-10Vdc from load mode switching. Current and voltage monitors

method that continuously adjusts the load current using the CC mode while measuring the load voltage until maximum power is
Setting items

Contents

During MPPT
operation Step timeinterval

200ms or 1000ms

MPPT operation mode

Graphs in real time during execution.
Real-time monitoring is possible
via the main unit orcommunication interface.

During the entire scan
Step time interval

Example of MPPT CC
mode execution

Overall scan execution time

8 memory functions

CC

200ms or 1000ms

10s ～ 999h59m59s

Communication Interface

Up to 8 load modes, load setpoints, and other conditions

LAN/USB/RS-232C as standard. Separately optional GP-IB

can be saved/loaded.

converter (RS-232C conversion) is also available.

USB for power
supply for GPIB/RS-232C
converter

provided for PLC control. It supports analog control load settings (CC, CV, CP)(isolated) are also provided for reading measured values, and CC+CV andCP+CV modes can be controlled from a PLC.

EXT I/O（External Digital Control）
Name

Emergency Stop

By connecting a USB memory device to the dedicated USB port,

measurement data such as Sweep mode can be saved to the USB memory
device. SEQUENCE mode and Dyanmic mode settings can also be readfrom and saved to the USB memory.

Use

Emergency stop

External analog control

External digital control

MODE CONT CC

Load mode setting(CC)MODE CONT CP

Load mode setting(CP)RANGE CONT

Current range setting

EXT CC

External CC Control 0 ～ 10V Input

Trigger output

EXT CP

External CP Control 0 ～ 10V Input

MODE CONT CV

Load mode setting(CV)LOAD ON/OFF CONT

Protection and Alarm Clear

ALARM PROTECTION

Protection/alarm status

TRIG OUTSTATUS CC

load-mode condition(CC)STATUS CP

load-mode condition(CP)RANGE STATUS

Current range state

STATUS CV

EXT INPUT（External Digital Control）

Load On・Off

Alarm Clear

Name

Use

EXT CV

External CV Control 0 ～ 10V Input

MONITOR（Isolated output）

load-mode condition(CV)LOAD ON STATUS

Compatible with USB memory

Voltage/current monitor (insulated)

Name

Load on/off state

MONITOR V
MONITOR I

Use

Voltage monitor output（5V full-scale）

Current monitor output（5V full-scale）

Intelligent master-slave functionality

Master-slave connections can be made with a single

parallel operation cable. Different capacity models canbe flexibly increased up to a maximum of 150 kW withslave machine
MASTER/SLAVE
OUTIN

slave machine
MASTER/SLAVE
OUTIN

slave machine
MASTER/SLAVE
OUTIN

slave machine
MASTER/SLAVE
OUTIN

slave machine
MASTER/SLAVE
OUT
IN

master machine
MASTER/SLAVE
OUTIN

up to 6 units (including the master unit) for the same
voltage model.

600V / 4200A / 60kW Large capacity DC electronic load

1000V / 6000A / 150kW Large capacity DC electronic load

QL-D-20K-6 QL-D-20K-6
20kW
20kW

QL-D-25K-1K QL-D-25K-1K QL-D-25K-1K QL-D-25K-1K QL-D-25K-1K QL-D-25K-1K
25kW
25kW
25kW
25kW
25kW
25kW

USB （HOST）

QL-D-5K-6
5kW

QL-D-5K-6
5kW

QL-D-5K-6
5kW

QL-D-5K-6
5kW※USB2.0 16GB or less
Format is FAT32

12

13

Evolution

To meet every need,―Interface, CaseA wide variety of new functions

Remote sensing function

Bench-top type (5kW model only) lineup

Remote sensing can change the voltage reference point in voltage measurement and CR, CV, and CP modes from the load input

The standard model is a caster type, but the 5kW model is available in a

resistance of the load cable can be eliminated and the load mode as the voltage reference can be stabilized.

a bench-top type in addition to the caster type. It uses rubber feet similar toterminal to any sensing point. By setting the sensing point at the end of the DUT, the influence of voltage drop due to the

Model

Input Rated Voltage

QL-D-*-6

600V

QL-D-*-1

Remote sense input
terminal Safety socket
for banana plug

150V

QL-D-*-1K

1000V* denotes load capacity in each model

Cable clamp forﬁxing sense cablebench-top type in addition to the caster type. The 5kW model is available inthose of general bench-top type power supply units, enabling constructionof a test environment on a tabletop.
The bench-top type can be easily mounted in a rack by simply removing therubber feet, making it ideal for system setup using a 19-inch rack.

5U(5kW)
31kg

Emergency stop switch on front panel as standard equipment

Equipped with an emergency stop switch, which is indispensable in the car

electronics industry. It is large enough to be easily seen from the front panel
and is equipped with a guard to prevent malfunction. In addition tooperation from the front panel, control from external digital control (EXT I/O)
is also possible.

Space-saving and lightweight compared to conventional productsCompared to the conventional 34000A series, the volume has been reduced by up to 70% (compared to the 5kW model) and themass by 65%.

The width has also been reduced from 647 mm to 430 mm, making it easier to secure space for installation.

Conventional product34105A (5kW)647mm

Equipped with box-type safety cover (standard on all models)

QL-D-5K-1 (5kW)

Safety covers are provided as standard on all models at the load input
terminals that carry high voltages and large currents. The load input

Maximum volume
70% Down!

terminals are designed for safety and security with maximum considerationof usability.

430mm
573mm
322mm

100

kg

Maximum mass
65% Down!

35kg

Anchor bolt fixing fittings are available for earthquake resistance (optional)

Anchor bolt fixing fittings are available as an option for earthquake-proof
measures for large-capacity DC electronic loads. This can be used as acountermeasure against enclosure tipping over.

35kg

14

85kg

115kg

145kg

175kg

15

Elongation

From Applications One Step Ahead―Applications

Extending the Potential of Electronic Loads

Reproduction of large current overshoot current

High-frequency DC ripple-superimposed power supply using electronic loads

In dynamic mode, the Chart (graph) on the LCD panel changes in real time to make it easier to understand the relationshipbetween the set time and the set current. This allows you to visually check the current fluctuation before testing.

Separation of DC and AC components (ripple superposition) enables wideband operation. The superimposed current and DC
current can be set separately.

Current

DCcomponent

ACcomponent

Inductance

Capacitor

Resistance

Fuse

Frequency characteristic：100kHzTime

Dynamic mode setting

Large capacity
DC electronic load
"QL-D Series"

DUT

DC
component
Superimposedcomponent

Load current waveform

16 step current variation pattern

How to reproduce overshoot power supply

DC electronic load
Load Station series

Load current

Load current

Overshoot current

Large capacity DC electronic load
"QL-D Series"

Overshoot current time
Reproducible from 1μs min.

Constant current power supply capable of current superposition at large currents using electronic loads
By connecting two constant current sources, a DC current source and a superimposed current source, in parallel, it is possible toconstruct a constant current source with a large current and high frequency superimposed current (100 kHz).

Function
Generator

0-100kHz

Wide bandwidth testing is possible even when DC and AC (superimposed) components are simultaneously loaded.

Impedance measurement is possible with sinusoidal superimposed current while maintaining frequency bandwidth up to
100KHz.

Waveform
generation

DC Current
SourceSuperimposedcurrent source

CC mode constantcurrent source

Time

＋

Maximum superimposed

DC power supply
Genesys+series

frequency100KHz－

Function
Generator

Impedance measuring
instruments groupAC superimposed signal

External control
Voltagemeasurement－

Current

Large capacity
DC electronic load
"QL-D Series"

Waveform
generation

0-100kHz

Isolator

Control PC＋

External control(CC mode)

CV mode constantvoltage source

DC power supply
Genesys+series＋－

Superimposed current source*The superimposed current changes depending on the wiring and DUT inductance.

16

Waveform
generation

Electronic load for high-frequency superposition suitable for fuel cell short stack evaluation

Current

Electrolytic cell
etc.

External
control

Time

Time

DUT

DC power supply
Genesys+seriesDC
component

Short stack
Fuel cellAC
component
Frequency characteristic：100kHzTime

Current
measurement

Large capacity DC electronic load
"QL-D Series"

Current measurement
CT
17

Specification
150V TypeModel

DC RatingCurrent
setting range
Setting
resolution
Constant
Current (CC)Mode

Accuracy
CC modeslew rate

QL-D-5K-1/B
Rated voltage
Rated current
Rated power
H
L
H
L
H
L
H
L

Rise current
over
H//L
/Under
Shoot range
Voltage range
Resistancesetting range
Resolution
Constant
Resistance
(CR)
Mode

Accuracy
Voltage range
Resistancesetting range
Setting
resolution

500 A
5000 W
0 A ~ 500 A
0 A ~ 50 A
50 mA
5 mA

0.5 A / μs～50 A / μs
0.05 A / μs～5 A / μs

QL-D-10K-1

QL-D-15K-1

150 V
1000 A
1500 A
10000 W
15000 W
0 A ~ 1000 A
0 A ~ 1500 A
0 A ~ 100 A
0 A ~ 150 A
100 mA
150 mA
10 mA
15 mA± {0.2% of Setting + 0.4% of Range}± {0.2% of Setting + 0.4% of Range}
0.5 A / μs～50 A / μs
0.5 A / μs～50 A / μs
0.05 A / μs～5 A / μs
0.05 A / μs～5 A / μs

QL-D-20K-1

333.3 S ~ 0.03 S (0.003 Ω ~ 30 Ω)L

33.33 S ~ 0.003 S (0.03 Ω ~ 300 Ω)H
L

0.03 S
0.003 SH

111.1 S ~ 0.01 S (0.009 Ω ~ 90 Ω)L

11.11 S ~ 0.001 S (0.09 Ω ~ 900 Ω)H
L

0.01 S
0.001 S

0 W ~ 5000 W
0 W ~ 500 W
0.5 W
0.05 W

0 W ~ 5000 W
0 W ~ 500 W
0.5 W
0.05 W
0 A ~ 500 A
0 A ~ 50 A
50 mA
5 mA

0 W ~ 5000 W
0 W ~ 500 W
0.5 W
0.05 W

0 W ~ 5000 W
0 W ~ 500 W
0.5 W
0.05 W

15 V
666.6 S ~ 0.06 S
999.9 S ~ 0.09 S(0.0015 Ω ~ 15 Ω)(0.001 Ω ~ 10 Ω)
66.66 S ~ 0.006 S
99.99 S ~ 0.009 S(0.015 Ω ~ 150 Ω)(0.001 Ω ~ 10 Ω)
0.06 S
0.09 S
0.006 S
0.009 S± 0.4% of {Setting + Range}
150 V
222.2 S ~ 0.02 S
333.3 S ~ 0.03 S(0.0045 Ω ~ 45 Ω)(0.003 Ω ~ 30 Ω)
22.22 S ~ 0.002 S
33.33 S ~ 0.3 S(0.045 Ω ~ 450 Ω)(0.03 Ω ~ 300 Ω)
0.02 S
0.03 S
0.002 S
0.003 S± 0.4% of {Setting + Range}
10.7 A/us
0 V ~ 150 V
0 V ~ 15V
0.01 V
0.001 V± 0.1% of (Setting + Range)
600 us150 V
0 W ~ 10000 W
0 W ~ 15000 W
0 W ~ 1000 W
0 W ~ 1500 W
1.0 W
1.5 W
0.1 W
0.15 W± 1.0% of (Setting + Range)
15 V
0 W ~ 10000 W
0 W ~ 15000 W
0 W ~ 1000 W
0 W ~ 1500 W
1.0 W
1.5 W
0.1 W
0.15 W± 1.0% of (Setting + Range)
0 A ~ 1000 A
0 A ~ 1500 A
0 A ~ 100 A
0 A ~ 150 A
100 mA
150 mA
10 mA
15 mA± 1.0% of (Setting + Range)
0~10 V150 V
0 W ~ 10000 W
0 W ~ 15000 W
0 W ~ 1000 W
0 W ~ 1500 W
1.0 W
1.5 W
0.1 W
0.15 W± 1.0% of (Setting + Range)
15 V
0 W ~ 10000 W
0 W ~ 15000 W
0 W ~ 1000 W
0 W ~ 1500 W
1.0 W
1.5 W
0.1 W
0.15 W± 1.0% of (Setting + Range)
0~10 V

150V Type（Continued from previous page）
Model

H
L
H
L

Power setting
range
2000 A
20000 W
0 A ~ 2000 A
0 A ~ 200 A
200 mA
20 mA

0.5 A / μs～50 A / μs
0.05 A / μs～5 A / μs

± {0.2% of Setting + 0.4% of Range}H

Accuracy
CR mode slew rate (Typ. value)
H
Voltagesetting range
L
Constant
H
Setting
Voltage (CV)resolution
L
Mode
Accuracy
Response time (Typ. value)
Voltage range
H
Power setting
range
L
H
Resolution
L
Constant
Accuracy
Power (CP)Voltage range
Mode
HPower setting
range
L
H
Resolution
L
Accuracy
H
Current
setting range
L
External
H
Setting
Control
resolution
L(EXT CC) Mode
Accuracy
Control voltage
Voltage range
H
Power setting
range
L
H
Resolution
L
External
Accuracy
Control
Voltage range(EXT CP)HPower setting
Mode
range
L
H
Resolution
L
Accuracy
Control voltage

18

QL-D-5K-1
Load carrying capacity

S-2501-01

1333.2 S ~ 0.12 S(0.00075 Ω ~ 7.5 Ω)
133.32 S ~ 0.012 S(0.0075 Ω ~ 75 Ω)
0.13 S
0.013 S444.4 S ~ 0.04 S(0.002 Ω ~ 25 Ω)
44.44 S ~ 0.4 S(0.02 Ω ~ 250 Ω)
0.04 S
0.004 S

0 W ~ 20000 W
0 W ~ 2000 W
2.0 W
0.2 W

0 W ~ 20000 W
0 W ~ 2000 W
2.0 W
0.2 W
0 A ~ 2000 A
0 A ~ 200 A
200 mA
20 mA

0 W ~ 20000 W
0 W ~ 2000 W
2.0 W
0.2 W

0 W ~ 20000 W
0 W ~ 2000 W
2.0 W
0.2 W

External
Control(EXT CV)Mode

Dynamic
Mode(Variableload)

Setting
resolution

Accuracy
Response time (Typ. value)
Control voltage
SHORT ModeControl method
Available load modes
Setting cycle
Cycle resolution
Operation selection
Minimum load responsetime (nominal)

Sweep R (V-I characteristic test)
Sweep C (overcurrent characteristic test)
Sweep P (overpower characteristic test)
Available mode
Maximum number of steps
Step time
Step time resolution
Number of times repeated
H
L
H
Measurement
DC voltage
resolutionLmeasurement
H
Measurement
accuracyL
Measurement TimeH
Current
setting range
L
H
Measurement
DC current
resolutionLmeasurement
H
Measurement
accuracyL
Measurement Time
Measurement method
DC Power
Measurement
Measurement TimePower setting
range

Current Limit

Power Limit

Current
settingrange
Resolution
Operation
at Limit
Rated power
Operation
at Limit

QL-D-5K-1/B

QL-D-5K-1

QL-D-10K-1
QL-D-15K-1
QL-D-20K-1
0 V ~ 150 V
0 V ~ 15V
0.01 V
0.001 V± 0.1% of (Setting + Range)
600 us0~10 V
500 A
1000 A
1500 A
2000 ADC operating mode
Switching operation (sequential switching between 2 or up to 32 different load conditions)
CC / CR / CV / CP mode
～20 ms / ～200 ms / ～2 s / ～20 s / ～60 s
1 μs / 10 μs / 100 μs / 1 ms / 10 ms
Single (Time only), Repeat
5 us
DC sweep mode
Measure current and voltage values while varying the load in CR mode
Measure current and voltage values while varying the load in CC mode
Measure power and voltage values while varying the load in CP mode
DC Sequence Mode
CC / CR / CV / CP Mode4096
1 ms～10 min（Common in each step）
1 ms(1 ms～100 ms) / 100 ms(100 ms～10 min)1 ~ 65535，or ∞DC Measurement Section
0 ~ 150 V
0 ~ 15 V
0.01 V
0.001 V± 0.05% of (Reading + Range)± 0.05% of (Reading + Range)
100 ms
0 ~ 500 A
0 ~ 1000 A
0 ~ 1500 A
0 ~ 50 A
0 ~ 100 A
0 ~ 150 A
0.05 A
0.1 A
0.15 A
0.005 A
0.01 A
0.015 A± 0.2% of (Reading + Range)± 0.2% of (Reading + Range)
100 msVoltage × Current calculation
100 msLimit function
0 A ~ 500 A

0 A ~ 1000 A

0 A ~ 1500 A

0 ~ 2000 A
0 ~ 200 A
0.2 A
0.02 A

0 A ~ 2000 A

1/1000 of range
Current limit at load off or 110% of setpoint (selectable)
5000 W

10000 W

15000 W

20000 W

Power limiting at 110% of load off or rated power (selectable)
General Specifications

Input Rating
1Ø2W
Input Voltage/
AC85 V ~ 264 V， Overvoltage category II / 47 Hz ~ 63 Hz
Frequency
Power supply
Force rate
(at maximum
0.9 or higher
load)
At maximum
Input power
240 VA
1810 VA
1810 VA
1810 VAload
At maximum
Input current
3A
18 A
18 A
18 A
load
Weight (Main body only)
31kg
35kg
85kg
115kg
145kg
Dimension(WxHxD)
430×219×550mm
430×487×630mm
430×665×630mm
430×843×630mm*Not including protrusions
Dimension(WxHxD)*Including protrusions 435×238(foot)×700mm
430×322×700mm
430×580×785mm
430×758×785mm
430×936×785mm
Shape of power supply
Inlet
Terminal block (electrical)
M10 terminal
Load terminal shape

19Specification
600V TypeModel

QL-D-5K-6/B

Rated voltage
Rated current
Rated power
H
Current
setting range
L
H
Setting
resolution
L
H
Constant
Accuracy
L
Current (CC)H
Mode
CC modeslew rate
L
Rise current
over
H//L
/Under
Shoot range
Voltage range
DC RatingResistancesetting range
Resolution
Constant
Resistance
(CR)
Mode

Setting
resolution

0.2 A / μs ~ 20 A / μs
0.02 A / μs ~ 2 A / μs

QL-D-15K-6

600 V
700 A
1050 A
10000 W
15000 W
0 A ~ 700 A
0 A ~ 1050 A
0 A ~ 70 A
0 A ~ 105 A
20 mA
30 mA
2 mA
3 mA
± {0.2% of Setting + 0.4% of Range}± {0.2% of Setting + 0.4% of Range}
0.2 A / μs ~ 20 A / μs 0.2 A / μs ~ 20 A / μs
0.02 A / μs ~ 2 A / μs 0.02 A / μs ~ 2 A / μs

QL-D-20K-6

QL-D-25K-6

L

8.333 S ~ 0.0002 S (0.12 Ω ~ 4800 Ω)H
L

0.002 S
0.0002 S

H

33.33 S ~ 0.0006 S (0.03 Ω ~ 1800 Ω)L

3.333 S ~ 0.00006 S (0.3 Ω ~ 18000 Ω)H
L

0.0006 S
0.00006 S

1400 A
20000 W
0 A ~ 1400 A
0 A ~ 140 A
40 mA
4 mA

1750 A
25000 W
0 A ~ 1750 A
0 A ~ 175 A
50 mA
5 mA

0.2 A / μs ~ 20 A / μs
0.02 A / μs ~ 2 A / μs

0.2 A / μs ~ 20 A / μs
0.02 A / μs ~ 2 A / μs

100 V
166.66 S ~ 0.006 S 249.99 S ~ 0.006 S 333.32 S ~ 0.008 S 416.65 S ~ 0.010 S(0.006 Ω ~ 240 Ω)(0.004 Ω ~ 160 Ω)(0.003 Ω ~ 120 Ω)(0.0024 Ω ~ 96 Ω)
16.66 S ~ 0.0006 S 24.99 S ~ 0.0006 S 33.32 S ~ 0.0008 S 416.65 S ~ 0.001 S(0.06 Ω ~ 2400 Ω)(0.04 Ω ~ 1600 Ω)(0.03 Ω ~ 1200 Ω) (0.0024 Ω ~ 966 Ω)
0.004 S
0.006 S
0.008 S
0.01 S
0.0004 S
0.0006 S
0.0008 S
0.001 S± 0.4% of {Setting + Range}
600 V
66.66 S ~ 0.0012 S 99.99 S ~ 0.0018 S 133.33 S ~ 0.0024 S 166.66 S ~ 0.003 S(0.015 Ω ~ 900 Ω)(0.01 Ω ~ 600 Ω)(0.0075 Ω ~ 450 Ω) (0.006 Ω ~ 360 Ω)
6.666 S ~ 0.00012 S 9.999 S ~ 0.00018 S 13.333 S ~ 0.00024 S 16.666 S ~ 0.0003 S(0.15 Ω ~ 9000 Ω)(0.1 Ω ~ 6000 Ω)(0.075 Ω ~ 4500 Ω)(0.06 Ω ~ 3600 Ω)
0.0012 S
0.0018 S
0.0024 S
0.0030 S
0.00012 S
0.00018 S
0.00024 S
0.00030 S± 0.4% of {Setting + Range}
0.64 A/us
0 V ~ 600 V
0 V ~ 100 V
0.1
0.01± 0.1% of (Setting + Range)
75 us

0 W ~ 5000 W
0 W ~ 500 W
0.5 W
0.05 W

0 W ~ 5000 W
0 W ~ 500 W
0.5 W
0.05 W
0 A ~ 350 A
0 A ~ 35 A
10 mA
1 mA

0 W ~ 5000 W
0 W ~ 500 W
0.5 W
0.05 W

0 W ~ 5000 W
0 W ~ 500 W
0.5 W
0.05 W

100 V
0 W ~ 10000 W
0 W ~ 15000 W
0 W ~ 1000 W
0 W ~ 1500 W
1.0 W
1.5 W
0.1 W
0.15 W± 1.0% of (Setting + Range)
600 V
0 W ~ 10000 W
0 W ~ 15000 W
0 W ~ 1000 W
0 W ~ 1500 W
1.0 W
1.5 W
0.1 W
0.15 W± 1.0% of (Setting + Range)
0 A ~ 700 A
0 A ~ 1050 A
0 A ~ 70 A
0 A ~ 105 A
20 mA
30 mA
2 mA
3 mA
± 1.0% of (Setting + Range)
0~10 V
100 V
0 W ~ 10000 W
0 W ~ 15000 W
0 W ~ 1000 W
0 W ~ 1500 W
1.0 W
1.5 W
0.1 W
0.15 W± 1.0% of (Setting + Range)
600 V
0 W ~ 10000 W
0 W ~ 15000 W
0 W ~ 1000 W
0 W ~ 1500 W
1.0 W
1.5 W
0.1 W
0.15 W± 1.0% of (Setting + Range)
0~10 V

600V Type（Continued from previous page）
Model

H
L
H
L

Voltagesetting range± {0.2% of Setting + 0.4% of Range}

83.33 S ~ 0.002 S (0.012 Ω ~ 480 Ω)

Accuracy
CR mode slew rate (Typ. value)
H
Voltagesetting range
L
H
Constant
Setting
Voltage (CV)resolution
L
Mode
Accuracy
Response timeH
(Typ. value)
Voltage range
H
Power setting
range
L
H
Resolution
L
Constant
Accuracy
Power (CP)Voltage range
Mode
HPower setting
range
L
H
Resolution
L
Accuracy
H
Current
setting range
L
External
H
Setting
Control
resolution
L(EXT CC) Mode
Accuracy
Control voltage
Voltage range
H
Power setting
range
L
H
Resolution
L
External
Accuracy
Control
Voltage range(EXT CP)HPower setting
Mode
range
L
H
Resolution
L
Accuracy
Control voltage

20

350 A
5000 W
0 A ~ 350 A
0 A ~ 35 A
10 mA
1 mA

H

Accuracy
Voltage range
Resistancesetting range

QL-D-5K-6
QL-D-10K-6
Load carrying capacity

S-2501-01

0 W ~ 20000 W
0 W ~ 2000 W
2.0 W
0.2 W

0 W ~ 25000 W
0 W ~ 2500 W
2.5 W
0.25 W

0 W ~ 20000 W
0 W ~ 2000 W
2.0 W
0.2 W

0 W ~ 25000 W
0 W ~ 2500 W
2.5 W
0.25 W

0 A ~ 1400 A
0 A ~ 140 A
40 mA
4 mA

0 A ~ 1750 A
0 A ~ 175 A
50 mA
5 mA

0 W ~ 20000 W
0 W ~ 2000 W
2.0 W
0.2 W

0 W ~ 25000 W
0 W ~ 2500 W
2.5 W
0.25 W

0 W ~ 20000 W
0 W ~ 2000 W
2.0 W
0.2 W

0 W ~ 25000 W
0 W ~ 2500 W
2.5 W
0.25 W

External
Control(EXT CV)Mode

Dynamic
Mode(Variableload)

Setting
resolution

QL-D-5K-6/B

QL-D-10K-6
QL-D-15K-6
QL-D-20K-6
QL-D-25K-6
0 V ~ 600 V
0 V ~ 100 V
0.1
0.01± 0.1% of (Setting + Range)
75 us
0~10 V
350 A
700 A
1050 A
1400 A
1750 ADC operating mode
Switching operation (sequential switching between 2 or up to 32 different load conditions)
CC / CR / CV / CP mode
～20 ms / ～200 ms / ～2 s / ～20 s / ～60 s
1 μs / 10 μs / 100 μs / 1 ms / 10 ms
Single (Time only), Repeat

Accuracy
Response time (Typ. value)
Control voltage
SHORT ModeControl method
Available load modes
Setting cycle
Cycle resolution
Operation selection
Minimum load responsetime (nominal)

5 us
DC sweep mode
Measure current and voltage values while varying the load in CR mode
Measure current and voltage values while varying the load in CC mode
Measure power and voltage values while varying the load in CP mode
DC Sequence Mode
CC / CR / CV / CP Mode4096
1 ms～10 min（Common in each step）
1 ms(1 ms～100 ms) / 100 ms(100 ms～10 min)
1～65535，or ∞DC Measurement Section
0 ~ 600 V
0 ~ 100 V
0.1 V
0.01 V± 0.05% of (Reading + Range)± 0.05% of (Reading + Range)
100 ms
0 A ~ 350 A
0 A ~ 700 A
0 A ~ 1050 A
0 A ~ 1400 A
0 A ~ 35 A
0 A ~ 70 A
0 A ~ 105 A
0 A ~ 140 A
0.05 A
0.01 A
0.005 A
0.001 A± 0.2% of (Reading + Range)± 0.2% of (Reading + Range)
100 msVoltage × Current calculation
100 msLimit function

Sweep R (V-I characteristic test)
Sweep C (overcurrent characteristic test)
Sweep P (overpower characteristic test)
Available mode
Maximum number of steps
Step time
Step time resolution
Number of times repeated
H
L
H
Measurement
DC voltage
resolutionLmeasurement
H
Measurement
accuracyL
Measurement TimeH
Current
setting range
L
H
Measurement
DC current
resolutionLmeasurement
H
Measurement
accuracyL
Measurement Time
Measurement method
DC Power
Measurement
Measurement TimePower setting
range

Current Limit

Power Limit

Current
settingrange
Resolution
Operation
at Limit
Rated power
Operation
at Limit

Input Rating
Input Voltage/
Frequency
Power supply
Force rate
(at maximum
load)
At maximum
Input powerload
At maximum
Input current
load
Weight (Main body only)
Dimension(WxHxD)*Not including protrusions
Dimension(WxHxD)*Including protrusions
Shape of power supply
Load terminal shape

QL-D-5K-6

0 A～500 A

0 A～350 A

0 A ~ 1750 A
0 A ~ 175 A

0 A～200 A

1/1000 of range
Current limit at load off or 110% of setpoint (selectable)
5000 W

10000 W

15000 W

20000 W

25000 W

Power limiting at 110% of load off or rated power (selectable)
General Specifications

1Ø2W

AC85 V ~ 264 V， Overvoltage category II / 47 Hz ~ 63 Hz
0.9 or higher

31kg

240 VA

1810 VA

1810 VA

1810 VA

1810 VA

3A

18 A

18 A

18 A

18 A

85kg

115kg

145kg

175kg
430×1021×
630mm

35kg

430×219×550mm

430×487×630mm 430×665×630mm 430×843×630mm

435×238(foot)×430×322×700mm 430×580×785mm 430×758×785mm 430×936×785mm 430×1114×785mm
700mm
Inlet
Terminal block (electrical)
M10 terminal

21

Specification
1000V Type
Model

Rated voltage
Rated current
Rated power
H
Current
setting range
L
H
Setting
resolution
L
H
Constant
Accuracy
L
Current (CC)H
Mode
CC modeslew rate
L
Rise current
over
H//L
/Under
Shoot range
Voltage range
DC Rating

QL-D-5K-1K/B

QL-D-5K-1K
QL-D-10K-1K
Load carrying capacity

200 A
5000 W
0A ~ 200 A
0 A ~ 20 A
5 mA
0.5 mA0.12 A / μs ~ 12 A / μs
0.012 A / μs ~ 1.2 A / μs

QL-D-15K-1K

QL-D-20K-1K

S-2501-01

QL-D-25K-1K

1000 V
400 A
600 A
800 A
1000 A
10000 W
15000 W
20000 W
25000 W
0A ~ 400 A
0A ~ 600 A
0A ~ 800 A
0A ~ 1000 A
0 A ~ 40 A
0 A ~ 60 A
0 A ~ 80 A
0 A ~ 100 A
10 mA
15 mA
20 mA
25 mA
1.0 mA
1.5 mA
2.0 mA
2.5 mA± {0.2% of Setting + 0.4% of Range}± {0.2% of Setting + 0.4% of Range}
0.12 A / μs ~ 12 A / μs 0.12 A / μs ~ 12 A / μs 0.12 A / μs ~ 12 A / μs 0.12 A / μs ~ 12 A / μs
0.012 A / μs ~ 1.2 A / μs 0.012 A / μs ~ 1.2 A / μs 0.012 A / μs ~ 1.2 A / μs 0.012 A / μs ~ 1.2 A / μs
± {0.2% of Setting + 0.4% of Range}

150 V
22.22 S ~ 0.0004 S 33.33 S ~ 0.0006 S 44.44 S ~ 0.0008 S 55.55 S ~ 0.0010 S
H
11.11 S ~ 0.0002 S (0.09 Ω ~ 4800 Ω)(0.045 Ω ~ 2400 Ω) (0.03 Ω ~ 1600 Ω) (0.0225 Ω ~ 1200 Ω) (0.018 Ω ~ 960 Ω)
Resistancesetting range
2.222 S ~ 0.00004 S 3.333 S ~ 0.00006 S 4.444 S ~ 0.00008 S 5.555 S ~ 0.00010 S
L
1.111 S ~ 0.00002 S (0.9 Ω ~ 48000 Ω)(0.45 Ω ~ 24000 Ω) (0.3 Ω ~ 16000 Ω) (0.225 Ω ~ 12000 Ω) (0.18 Ω ~ 9600 Ω)H
0.0002 S
0.0004 S
0.0006 S
0.0008 S
0.001 S
Resolution
L
0.00002 S
0.00004 S
0.00006 S
0.00008 S
0.0001 S
Constant
Accuracy± 0.4% of {Setting + Range}
Resistance
Voltage range
1000 V
(CR)
6.666 S ~ 0.00012 S 9.999 S ~ 0.00018 S 13.332 S ~ 0.00024 S 16.665 S ~ 0.0003 S
Mode
H
3.333 S ~ 0.00006 S (0.3 Ω ~ 18000 Ω)(0.15 Ω ~ 9000 Ω)(0.1 Ω ~ 6000 Ω)(0.075 Ω ~ 4500 Ω)(0.06 Ω ~ 3600 Ω)
Resistancesetting range
0.666 S ~ 0.000012 0.999 S ~ 0.000018 1.332 S ~ 0.000024 S 1.665 S ~ 0.00003 S
L
0.333 S ~ 0.000006 S (3.3 Ω ~ 180000 Ω)
S (1.5 Ω ~ 90000 Ω) S (1 Ω ~ 60000 Ω)(0.75 Ω ~ 45000 Ω) (0.6 Ω ~ 36000 Ω)H
0.00006 S
0.00012 S
0.00018 S
0.00024 S
0.00030 S
Setting
resolution
L
0.000006 S
0.000012 S
0.000018 S
0.000024 S
0.000030 S
Accuracy± 0.4% of {Setting + Range}
CR mode slew rate (Typ. value)
1.06 A/us
H
0 V ~ 1000 V
Voltagesetting range
L
0 V ~ 150 V
H
0.1
Constant
Setting
Voltage (CV)resolution
L
0.01
Mode
Accuracy± 0.1% of (Setting + Range)
Response timeH
150 us(Typ. value)
Voltage range
150 V
H
0 W ~ 5000 W
0 W ~ 10000 W
0 W ~ 15000 W
0 W ~ 20000 W
0 W ~ 25000 W
Power settingrange
L
0 W ~ 500 W
0 W ~ 1000 W
0 W ~ 1500 W
0 W ~ 2000 W
0 W ~ 2500 W
H
0.5 W
1.0 W
1.5 W
2.0 W
2.5 W
Resolution
L
0.05 W
0.1 W
0.15 W
0.2 W
0.25 W
Constant
Accuracy± 1.0% of (Setting + Range)
Power (CP)Voltage range
1000 VMode
H
0 W ~ 5000 W
0 W ~ 10000 W
0 W ~ 15000 W
0 W ~ 20000 W
0 W ~ 25000 W
Power settingrange
L
0 W ~ 500 W
0 W ~ 1000 W
0 W ~ 1500 W
0 W ~ 2000 W
0 W ~ 2500 W
H
0.5 W
1.0 W
1.5 W
2.0 W
2.5 W
Resolution
L
0.05 W
0.1 W
0.15 W
0.2 W
0.25 W
Accuracy± 1.0% of (Setting + Range)
H
0A ~ 200 A
0A ~ 400 A
0A ~ 600 A
0A ~ 800 A
0A ~ 1000 A
Current
setting range
L
0 A ~ 20 A
0 A ~ 40 A
0 A ~ 60 A
0 A ~ 80 A
0 A ~ 100 A
External
H
5 mA
10 mA
15 mA
20 mA
25 mA
Setting
Control
resolutionL
0.5 mA
1.0 mA
1.5 mA
2.0 mA
2.5 mA(EXT CC) Mode
Accuracy± 1.0% of (Setting + Range)
Control voltage
0~10 V
Voltage range
150 V
H
0 W ~ 5000 W
0 W ~ 10000 W
0 W ~ 15000 W
0 W ~ 20000 W
0 W ~ 25000 W
Power settingrange
L
0 W ~ 500 W
0 W ~ 1000 W
0 W ~ 1500 W
0 W ~ 2000 W
0 W ~ 2500 W
H
0.5 W
1.0 W
1.5 W
2.0 W
2.5 W
Resolution
L
0.05 W
0.1 W
0.15 W
0.2 W
0.25 W
External
Accuracy± 1.0% of (Setting + Range)
Control
Voltage range
1000 V(EXT CP)H
0 W ~ 5000 W
0 W ~ 10000 W
0 W ~ 15000 W
0 W ~ 20000 W
0 W ~ 25000 W
Power setting
Mode
range
L
0 W ~ 500 W
0 W ~ 1000 W
0 W ~ 1500 W
0 W ~ 2000 W
0 W ~ 2500 W
H
0.5 W
1.0 W
1.5 W
2.0 W
2.5 W
Resolution
L
0.05 W
0.1 W
0.15 W
0.2 W
0.25 W
Accuracy± 1.0% of (Setting + Range)
Control voltage
0~10 V

22

1000V Type（Continued from previous page）
Model

H
L
H
L

Voltagesetting range
External
Control(EXT CV)Mode

Dynamic
Mode(Variableload)

Setting
resolution

QL-D-5K-1K/B

QL-D-10K-1K
QL-D-15K-1K
QL-D-20K-1K
QL-D-25K-1K
0 V ~ 1000 V
0 V ~ 150 V
0.1
0.01± 0.1% of (Setting + Range)
150 us0~10 V
200 A
400 A
600 A
800 A
1000 ADC operating mode
Switching operation (sequential switching between 2 or up to 32 different load conditions)
CC / CR / CV / CPモード～20 ms / ～200 ms / ～2 s / ～20 s / ～60 s
1 μs / 10 μs / 100 μs / 1 ms / 10 ms
Single (Time only), Repeat
Function Request: Set the number of times to repeat (want)

Accuracy
Response time (Typ. value)
Control voltage
SHORT ModeControl method
Available load modes
Setting cycle
Cycle resolution
Operation selection
Minimum load responsetime (nominal)

5 us
DC sweep mode
Measure current and voltage values while varying the load in CR mode
Measure current and voltage values while varying the load in CC mode
Measure power and voltage values while varying the load in CP mode
DC Sequence Mode
CC / CR / CV / CP Mode4096
1 ms～10 min（Common in each step）
1 ms(1 ms～100 ms) / 100 ms(100 ms～10 min)
1～65535，又は∞DC Measurement Section
0 ~ 1000 V
0 ~ 150 V
0.1 V
0.01 V± 0.05% of (Reading + Range)± 0.05% of (Reading + Range)
100 ms0A ~ 200 A
0A ~ 400 A
0A ~ 600 A
0A ~ 800 A
0 A ~ 20 A
0 A ~ 40 A
0 A ~ 60 A
0 A ~ 80 A
0.01 A
0.02 A
0.03 A
0.04 A
0.005 A
0.01A
0.015 A
0.02 A± 0.2% of (Reading + Range)± 0.2% of (Reading + Range)
100 msVoltage × Current calculation
100 msLimit function

Sweep R (V-I characteristic test)
Sweep C (overcurrent characteristic test)
Sweep P (overpower characteristic test)
Available mode
Maximum number of steps
Step time
Step time resolution
Number of times repeated
H
L
H
Measurement
DC voltage
resolutionLmeasurement
H
Measurement
accuracyL
Measurement TimeH
Current
setting range
L
H
Measurement
DC current
resolutionLmeasurement
H
Measurement
accuracyL
Measurement Time
Measurement method
DC Power
Measurement
Measurement TimePower setting
range

Current Limit

Power Limit

Current
settingrange
Resolution
Operation
at Limit
Rated power
Operation
at Limit

Input Rating
Input Voltage/
Frequency
Power supply
Force rate
(at maximum
load)
At maximum
Input powerload
At maximum
Input current
load
Weight (Main body only)
Dimension(WxHxD)*Not including protrusions
Dimension(WxHxD)*Including protrusions
Shape of power supply
Load terminal shape

QL-D-5K-1K

0A ~ 200 A

0A ~ 400 A

0A ~ 600 A

0A ~ 800 A

0A ~ 1000 A
0 A ~ 100 A
0.05 A
0.025 A

0A ~ 1000 A

1/1000 of range
Current limit at load off or 110% of setpoint (selectable)
5000 W

10000 W

15000 W

20000 W

25000 W

Power limiting at 110% of load off or rated power (selectable)
General Specifications
AC85 V ~ 264 V，

1Ø2W

Overvoltage categoryⅡ／

47 Hz ~ 63 Hz

0.9 or higher
240 VA

1810 VA

3A
31kg

35kg

430×219×550mm

1810 VA

1810 VA

1810 VA

18 A

18 A

18 A

18 A

85kg

115kg

145kg

175kg
430×1021×
630mm

430×487×630mm 430×665×630mm 430×843×630mm

435×238(foot)×430×322×700mm 430×580×785mm 430×758×785mm 430×936×785mm 430×1114×785mm
700mm
Inlet
Terminal block (electrical)
M10 terminal

23

Specification
Common to all models

Drawings
S-2501-01

Protection, alarm function
Overcurrent protection
Depends on current limit function (load off or current limit)
Overpower protection
Depends on current limit function (load off or current limit)
Overheat Protection
load off
Overvoltage alarmload off
Reverse connection alarmload off
Voltage sense open alarmload off
Other Functions
FeatureVoltage detection can be selected between INT (load terminal) and EXT (EXT IN terminal) by the main unit setting.
Remotesensing
VSENSE terminal (rear panel)
Banana terminals, connection with included safety plugs recommended
Parallel run
Up to 6 units possible (parallel operation with different capacities is possible for the same voltage specification)
Output format
Pulse output
Trigger
Output voltage+5 V
outputTerminal
DI/DO DSUB 25Pin EXT contacts
Power output
DI/DO DSUB 25Pin +5V output contact, supply capacity 100mA
External control signal Output/Input
CC
Shift to CC mode when contact is turned on
Load
mode
CV
Shift to CV mode when contact is turned on
settingCP
Shift to CP mode when contact is turned on
Control
Photocoupler
Load on/off
Load ON when contact is ON, Load OFF when contact is OFF
Input
LED Input
Current range
Current high range when contact is ON, current low range when contact is OFF
designation
Emergency stop
Emergency stop when contact is ON, emergency stop is canceled when contact is OFF
Load on/off
Load ON state when contact is ON, Load OFF state when contact is OFF
PhotoCurrent range
Current high range state when contact is ON, current low range state when contact is OFF
couplerProtection/alarm status
Alarm state when contact is ON, alarm state when contact is OFF
DIDO
open
CC
CC mode state when contact is ON
loadcollector
mode
CV
CV mode state when contact is ON
outputcondition
CP
CP mode state when contact is ON
Monitor output
5V full scale
Output impedance
50 Ω
VoltagemonitorMeasurement accuracy±{1% of Conv.Volt. +1% of F.S.}
Terminal
BNC
Monitor output
5V full scale
Output impedance
50 Ω
Current
MonitorMeasurement accuracy±{1% of Conv.Volt. +1% of F.S.}
Terminal
BNC
InterfaceUSB（HOST）
USB2.0 compliant (Fullspeed)USB（DEVICE）
USB2.0 compliant (Fullspeed)
LAN
IEEE 802,3 100Base-Tx/10Base-T Ethernet IPv4,RJ-45 connector、TCP/IP、 Keep Alive support
D-SUB 9pin, baud rate : under consideration (9600/19200/38400/115200 bps),
RS-232C
data length : 8 bit, stop bit : 1 bit, Parity bits : None, Flow control : None/CTS-RTS
GPIB（Option）
IEEE488.1 compliant（Address 1～30，Factory default1）
General Specifications
Operating environment
Indoor use
Operating temperature
0 ℃～ +40 ℃
Operating humidity
20 %RH ～ 85 %RH（No dew condensation）
Environmental
condition
Storage temperature-20 ℃～ +60 ℃
Storage Humidity
20 %RH ～ 85 %RH（No dew condensation）
Elevation
2000m or less
Cooling method
Forced air cooling by fan
Input-Load
Withstand voltage Between terminals
AC1500 V、Applied for 1 minute
Input - FG
Insulation resistance
Input - FG
500 V DC, 30 M Ω or more
EMC Standards
EN55011
Compliant Standards
Safety standards
EN61010-1 compliant, Pollution degree 2
Accessory
Handling instructions
Included in the attached CD-ROM
LOAD terminal cover
Cover to protect the LOAD terminal
Screw for LOAD terminal
Fixing screw for fixing the load cable to the LOAD terminal
Safety plug (red, black)
Plug for connection to voltage sense terminal
Power cord (only for inlet)
Power cable to energize the unit
D-sub 25Pin connector
Connector for connection to DI/DO
Options
QL-C-01
MPPT function
MPPT (maximum power point tracking) mode option in load mode
QO-C-01
GP-IB/RS-232C converter
Option for GP-IB communication / RS-232C communication
QO-C-02
Master-slave connection cable(1m)Cable used for parallel operation

24

QL-D-5K-x/B

QL-D-5K-x

QL-D-10K-x

25

Price list

Drawings
QL-D-15K-x

150V type

600V type
Model

Price

Price

Specification

QL-D-5K-1/B*

150V/500A/5kW 50A/μs

QL-D-5K-6/B* 600V/350A/5kW 20A/μs

QL-D-5K-1

150V/500A/5kW 50A/μs

QL-D-5K-6

600V/350A/5kW 20A/μs

QL-D-10K-1

150V/1000A/10kW 50A/μs

QL-D-10K-6

600V/700A/10kW 20A/μs

PleaseQL-D-15K-1

150V/1500A/15kW 50A/μs

QL-D-15K-6

600V/1050A/15kW 20A/μs

contact us

QL-D-20K-1

150V/2000A/20kW 50A/μs

QL-D-20K-6

600V/1400A/20kW 20A/μs

QL-D-25K-6

600V/1750A/25kW 20A/μs

Pleasecontact us* QL-D-5K-1/B is bench-top type. All other types are castor type.

QL-D-20K-x

Specification

Model

1000V type
Model

Specification*QL-D-5K-6/B is bench-top type. All other types are castor type.

Interface Accessory
Model

Price

QL-C-01

MPPT(Maximum Power
Point Tracking)function

QO-C-01

GPIB/RS-232C
Converter

QO-C-02

Master-slaveconnection 1m cable

QL-D-5K-1K/B* 1000V/200A/5kW 12A/μs
QL-D-5K-1K

1000V/200A/5kW 12A/μs

QL-D-10K-1K 1000V/400A/10kW 12A/μs

PleaseQL-D-15K-1K 1000V/600A/15kW 12A/μs

contact us

QL-D-20K-1K 1000V/800A/20kW 12A/μs

Specification

QL-D-25K-1K 1000V/1000A/25kW 12A/μs

Price

Please contactus*QL-D-5K-1K/B is bench-top type. All other types are castor type.

Inspection report
QL-D-25K-x

Model

QL-D-5K-■/B/REC
QL-D-5K-■/REC

Specification
QL-D-5K-■/B

Price

Inspection report(5kW)

QL-D-5K-■ Inspection report(5kW)

QL-D-10K-■/REC

QL-D-10K-■

Inspection report(10kW)

QL-D-15K-■/REC

QL-D-15K-■

Inspection report(15kW)

QL-D-20K-■/REC

QL-D-20K-■

Inspection report(20kW)

QL-D-25K-■/REC

QL-D-20K-■

Inspection report(25kW)

TCP

Traceability by product(Inspection report must be ordered)

SCI

Standard Instrument Test Report(Test report must be ordered)

Please contactus"■" will contain the voltage value in each model (1:150V, 6:600V, 1K:1000V).

26

27

● The information in this catalog is current as of Sep. 2023. Please confirm the latest specifications, prices, and delivery dates before purchasing.
The names of companies and products mentioned in this catalog are the trademarks or registered trademarks of the respective companies. The
specifications and shapes are subject to change without notice due to improvement. The information in this catalog is believed to be accurate.
However, if you find any errors or omissions, please contact us.

KEISOKU GIKEN Co., Ltd.

AgentsPowerElectronics Sales Dept.

Hiyoshi Operation

4-11-1 Minamikase, Saiwai-ku, Kawasaki-shi,
Kanagawa, Japan
TEL +81-44-223-7950 FAX +81-44-223-7960

E-mail : PWsales@hq.keisoku.co.jp / https://www.keisoku.co.jp● CP-0198-2309