GE 750‑P5‑G5‑S5‑HI‑A20‑R Feeder Management Relay

Product Description

The 750‑P5‑G5‑S5‑HI‑A20‑R is a GE Multilin 750 series feeder management relay. It is a microprocessor‑based protection and control device designed for medium‑voltage distribution feeders. This relay integrates protection functions, metering, fault recording, logic control and communication interfaces in a compact panel‑mount housing, and is widely adopted in power distribution automation and substation control systems.

Product Functions

• Overcurrent, earth fault, overvoltage and undervoltage protection
• Auto‑reclosing, breaker failure detection and cold load pickup control
• Three‑phase voltage, current, power and energy measurement
• Fault event recording, waveform capture and fault location calculation
• Programmable logic, digital input status monitoring and relay output control
• Multi‑protocol digital communication, supporting Modbus RTU, DNP3.0 for SCADA connection
• Local LCD display, status LED indicators and parameter configuration

Application Scenarios

• Medium‑voltage distribution feeders in power substations
• Industrial plant internal power distribution systems
• Mining, petrochemical and factory power supply protection
• Building and commercial complex power distribution automation
• Renewable energy station collector feeders
• SCADA and remote substation monitoring projects

Common Problems

• Communication interruption: incorrect baud rate, address mismatch or damaged communication wiring
• False protection tripping: improper setting values, harmonic interference or CT saturation
• No trip output after fault occurs: output relay damage, logic configuration error or broken control circuit
• Inaccurate metering data: CT/PT wiring reversal or parameter setting error
• LCD screen blank or flickering: power supply fluctuation or display hardware aging
• Lost fault records: abnormal power‑off during recording or memory failure