• EW series | DC Electronic Loads | Matsusada Precision
  • EW series | DC Electronic Loads | Matsusada Precision

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)

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

EW series

Models Rated voltage [V] Rated current [A] Rated power [W]
EW150V-2400W 150 480 2400

Booster for Slave units

Coming soon

Models Rated voltage [V] Rated current [A] Rated power [W]
EW150V-2400WB 150 480 2400

* Independent operation of booster is not allowed.

graph, related power 2400 W

Functions

High-power load 1.6 times higher than conventional models

1.5kW in the previous model
1.5kW in the previous model
2.4kW
Constant current/constant voltage (CC/CV) charge

Four multiple operating modes

Constant Current (CC) Discharge

Constant Current (CC) Discharge graph

A set current is discharged. Even if the terminal voltage changes during discharge, a constant current can flow.

Constant Resistance (CR) Discharge

Constant Resistance (CR) Discharge graph

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

Constant Power (CP) Discharge graph

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

Constant Voltage (CV) Discharge graph

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.

Auto switching image between operating modes

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
0.1Hz to 0 kHz Setting resolution 0.1Hz
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

The graph between Cycle (frequency) and Duty cycle

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 1000h
  • 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.

The waveform pattern of sequence function

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.

The waveform pattern of sequence function

Specifications

For details, download the datasheet below.

Options

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).

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

Accessories (Sold separately)

Adapters for connecting optical interface board

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.
CO-E32
USB-OPT: Adapter for USB
Total 32 units can be connected to one USB-OPT.
USB cable is not provided.
CO-U32
CO-OPT2-9: Adapter for RS-232C (9 pin)
Total 32 units can be connected to one CO-OPT2-9.
CO-OPT2-9
CO-OPT2-25: Adapter for RS-232C (25 pin)
Total 32 units can be connected to one CO-OPT2-25.
CO-OPT2-25
CO-OPT4-25: Adapter for RS-485 (25 pin)
Total 32 units can be connected to one CO-OPT4-25.
CO-OPT4-25
CO-G32: Adapter for GPIB
Total 32 units can be connected to one CO-G32.
GPIB cable is not provided.
CO-G32

Dedicated cable for the master/slave control: EW-MS cable

The cable is required for one booster.

AC input cable

Model Power Input End Input Plug Cable length Dimension
(Core wire)
Outlet Shape Rated Voltage Rated Maximum
CABLE TYPE3 CABLE TYPE 3 Power Input End CABLE TYPE 3 Input Plug 6.35-inch/2.5 m 0.27-inch/6.8 mm (Free) 250 V 10 A
CABLE TYPE4 CABLE TYPE 4 Power Input End CABLE TYPE 4 Input Plug 6.35-inch/2.5 m 0.30-inch/7.5 mm Outlet Shape Type SEOutlet Shape Type SEOutlet Shape Type SE Type SE 250 V 10 A

How to Order

To order, please specify the model No.
Example:
EW-MS cable
ET-32
CABLE TYPE 3

Dimensions

For details, download the datasheet below.

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