Digital feeder protection relay for medium voltage system. It samples CT and VT signals continuously, executes configurable overcurrent, earth fault, undervoltage and overvoltage protection logic. Built-in fault recording, event log and self-diagnosis function, communicates with SCADA via Modbus to upload alarm, fault and measurement data.

Certification: IEC, CE

Main CPU board, signal sampling circuit, trip relay group, status LED, terminal block and LCD display. Common faults: signal sampling abnormal, trip relay failure, communication interruption, setting parameter loss.