Page Contents

Description

The OP8125 module converts four standard ±16 V_peak voltages into high-voltage output, up to 150 V_rms. Each output is individually isolated from the simulators.

The OP8125 is short-circuit proof and its temperature and supply voltages are continuously monitored. A thermal shutdown prevents the voltage amplifier from exceeding its maximum operating temperature. An indicator is present to indicate if the output is at fault.

The OP8125 can be used standalone with minimal connection or used in an OP8120 chassis for a total of 32 high-voltage outputs per chassis.

When used in an OP8120 chassis, each channel is configured to match the OPAL-RT’s DB37 standard pinout.

Each output can deliver a current of up to 30 mA.

Features

• Voltage amplifier module for 4 isolated individual channels

• Differential inputs

• Fault display

Separated High-Voltage Ground

Functional isolation only. The high‑voltage section includes a high‑impedance connection across the isolation barrier, so the secondary is not fully galvanically isolated from the primary.
The high‑voltage grounds remain separate from the simulator ground and are treated as individual nodes. Use the front‑panel banana jack to bond the chassis to earth when required.

Applications

• Excitation voltage emulation (grid, electrical machine, etc.)

• High-voltage amplifier
  
  

Open

OP8125 Interface

Channels are identified as channels A, B, C and D. The OP8125 has four (4) screw terminal connectors.

Channel Status LEDs

Each channel has one LED. If all is functioning properly, the LED will be green.
If LED is red, it indicates either an overcurrent or a thermal protection fault on this channel.

Power LED

Each module has two power LEDs:

• When the left LED is on, it indicates that the internal ±15 Vdc power is functioning properly.

• When the right LED is on, it indicates that the ±24 Vdc power is functioning properly.