High Power DC Electronic Load
- Rated Voltage: 150 V
- Rated Current: 480 A
- Rated Power: 2400 W
- Multiple operating mode
Space-saving, High-power (2400W in 3U)
EW series is a DC electronic load in the space-saving. The DC load offers four operating mode: CC, CR, CP, and CV. Switching mode and VI mode are available.
Features and Benefits
- Four operating modes: Constant Current (CC), Constant Resistance (CR), Constant Power (CP), Constant Voltage (CV)
- Multi group displays of current, voltage, and power on the large LCD screen
- Greater load power and less space
- Wide variety of testing applications with the switching mode and programmable function
- Expandable up to five units (12 kW) with booster
Main Applications
- Evaluation of DC switching power supply
- For the absorption of surge current flowing into brushless DC motor
- Evaluation of DC relay and DC switches
- Evaluation of in-vehicle DC/DC converter
- Discharge test of a high current rechargeable battery and Electric double-layer capacitor
- I-V characteristic test of solar cells
Models
| Models | Rated voltage | Rated current | Rated power |
|---|---|---|---|
| EW150V-2400W | 150 V | 480 A | 2400 W |
| Models | Rated voltage | Rated current | Rated power |
|---|---|---|---|
| EW150V-2400WB | 150 V | 480 A | 2400 W |
* Independent operation of booster is not allowed.
Functions
High-power load 1.6 times higher than conventional models
Four multiple operating modes
Constant Current (CC) Discharge
A set current is discharged. Even if the terminal voltage changes during discharge, a constant current can flow.
Constant Resistance (CR) Discharge
A set resistance is used to discharge. The discharge current value is determined according to the set value by measuring the terminal voltage value.
Constant Power (CP) Discharge
A set power value is used to discharge. If the terminal voltage changes during discharge, a certain amount of power can be consumed according to the change.
Constant Voltage (CV) Discharge
A set voltage value is used to discharge. Even if the terminal current changes during discharge, it can be operated at a constant voltage.
Auto switching between operating modes
With the auto switching, the operating mode where the load current is minimized is automatically set in response to the set value. The individual function of CC+CV mode, CR+CV mode, and CP+CV mode using the auto switching remains as it is.
Switching mode
The mode enables to switch periodically between two values.
It is available for CC mode, CR mode, CP mode, and CV mode.
- Slew rate (in CC mode, Range H)
30 A/μs to 1 mA/μs
Setting resolution 1 mA/μs - Frequency
0.1 Hz to 20 kHz Setting resolution 0.1 Hz - Duty cycle
0 to 100% Setting resolution 0.1%
* at 10 V or more and at 100 A or more, with no voltage drop due to wiring
Sequence function
- Current/Voltage/Power/Resistance setting value of each program
(Available for the mode where the load current is minimized) - Step setting time 10 us to 1000 h
- The setting is available for up to 1,024 steps of 10 programs.
- Repetition frequency: infinite, or 1 time to 10000 times
The sequence function offers setting of step time, amplitude, ramp, and along with end of sequence, so you can create programs on the front panel.
VI Curve mode
It is possible to register up to 128 by combining the voltage value with the current ones. The mode provides a simulation of loads such as laser diodes and LEDs which have non-linear resistance characteristics.
Short function
Easily transfers to a low impedance state.
- CC/CP mode: Maximum
- CR mode: Maximum conductance
Soft start/stop
Allows slow rise/fall of the current at load-on/off. It is desirable to match the ride time on the power supply to reduce the occurrence of the current overshoot.
- Time: 10 μs to 500 ms
- Rising waveform: linear/saturation curve
- Minimum operating voltage: 0.05 V
Timer setting
Available the time settings that automatically turn the load off in a certain period from the load on.
- Setting time: 1 second to 10000 hours
Input/Output of sequence program
Reads and writes sequence programs using USB memory.
Spreadsheet software is available for files in CSV format.
Data logging function
Recoeds the measurement values of current and voltage with USB memory at regular intervals.
- Interval: 0.1 s to 300 s
Parallel operation mode
Up to five EW series electronic loads can be combined to operate as a single device.
The primary unit shows the summed set value and the monitored value.
The capacity can be increased to 12 kW by combining four boosters with EW150V-2400W.
EW-MS cables or commercially available LAN cables can be used for connection.
Specifications
Options
- -LGob
Optical Interface Board
-
Isolation control is performed by optical communication. As complete isolation is performed by means of optical fiber, this enables advance prevention of erroneous operation comprising transient phenomena resulting from surges, inductive lightning, external noise, etc.
(The standard interface is not included in the option.)
- -LGob: Optical interface board + optical cable 2 meters
- -LGob(Fc5): Optical interface board + optical cable 5 meters
- -LGob(Fc10): Optical interface board + optical cable 10 meters
- -LGob(Fc20): Optical interface board + optical cable 20 meters
- -LGob(Fc40): Optical interface board + optical cable 40 meters
Select the optional optical interface board (-LGob) when using this DC Electronic Load under the following conditions.
- Noisy environment including factories (Example: motors or coils are used near power supplies and loads).
- Using with high voltage floating (more than 250 V).
- Installation distance of 2 meters or more between this DC Electronic Load and a controller such as a computer, laptop, or Programmable Logic Controller (PLC).
-
Adapters for connecting optical interface board (Sold separately)
To use the optical interface, you need to prepare an optical interface adapter separately. The following interface adapters are available according to the communication method of your controller port.
- CO-E32: Adapter for LAN
- Total 32 units can be connected to one CO-E32.
- LAN cable is not provided.
- USB-OPT: Adapter for USB
- Total 32 units can be connected to one USB-OPT.
- USB cable is not provided.
- CO-OPT2-9: Adapter for RS-232C (9 pin)
- Total 32 units can be connected to one CO-OPT2-9.
- CO-OPT2-25: Adapter for RS-232C (25 pin)
- Total 32 units can be connected to one CO-OPT2-25.
- CO-OPT4-25: Adapter for RS-485 (25 pin)
- Total 32 units can be connected to one CO-OPT4-25.
- CO-G32: Adapter for GPIB
- Total 32 units can be connected to one CO-G32.
- GPIB cable is not provided.
(A) Optical fiber cable
How to Order
When ordering, add Option No. to Model No. in alphabetical order followed by the input voltage.
Example:EW150V-2400W-LGob(Fc20)
Accessories
- EW-MS cable 1 meter
-
Dedicated cable for controlling booster
The cable is used for the primary unit controlling the boosters (replicas).
The cable is required for one booster. You can substitute it with a commercially-available LAN cable.
| Sold separately | CABLE TYPE3 |  |
 |
250 V / 10 A | 2.5 meters Fixed length |
|---|---|---|---|---|---|
| Sold separately | CABLE TYPE4 | |
 |
250 V / 10 A | 2.5 meters Fixed length |
How to Order
To order, please specify the model No.
Example: EW-MS cable, CABLE TYPE 3
Download
-
EW series Datasheet
Date: 2022-12-19 rev.06
PDF (3,258 KB)
-
How to Use DC Power Supplies
Date: 2022-03-18 rev. 04
PDF (1,487 KB)
The account registration is necessary for downloading
-
EW series Datasheet
Date: 2022-12-19 rev.06
PDF (3,258 KB)
-
How to Use DC Power Supplies
Date: 2022-03-18 rev. 04
PDF (1,487 KB)
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