GE Multilin SR750 | Advanced Feeder Protection Module SR750-P5

GE Multilin SR750-P5-G5-S5-HI-A20-R-T Feeder Protection Relay – Product Description

Overview

The GE Multilin SR750-P5-G5-S5-HI-A20-R-T is a digital feeder protection relay designed to provide comprehensive protection, monitoring, and control for electrical feeders. Moreover, it integrates advanced diagnostics and high-speed outputs to ensure reliable operation in utility and industrial power distribution systems. Its robust design supports harsh environments while maintaining accurate performance.

Technical Specifications

Current Inputs:

• Phase CT: 5 A (P5)

• Ground CT: 5 A (G5)

• Sensitive Ground CT: 5 A (S5)

Protection Functions:

• Phase overcurrent (ANSI 50/51)

• Ground overcurrent (ANSI 50N/51N)

• Sensitive ground fault (ANSI 50G/51G)

• Breaker failure protection

• Thermal overload protection

• Optional under/overvoltage and frequency protection

Control & Outputs:

• Breaker control logic with interlocks

• High-speed relays for trip, alarm, or automation schemes

• Virtual inputs and programmable logic

• Manual commands via front panel or SCADA

Communication Protocols:

• Modbus RTU/TCP

• DNP3.0

• IEC 60870‑5‑103

• Ethernet connectivity for SCADA

Recording & Diagnostics:

• Event recording with timestamp

• Waveform capture for fault analysis

• Preventive maintenance and self-diagnostics

Power Supply:

• AC/DC universal supply (88–300 VDC / 70–265 VAC)

Environmental Ratings:

• Operating temperature: –40 °C to +70 °C

• Storage temperature: –40 °C to +85 °C

• EMC immunity per IEC 61000

Physical Specifications:

• Compact case for panel mounting

• weight: 3 kg

• Dimensions: 220 × 180 × 200 mm

FAQ

Q1: What types of faults does this relay protect against?
It protects phase, ground, and sensitive ground faults with adjustable timing settings.

Q2: Can it communicate with SCADA systems?
Yes, it supports Modbus RTU/TCP, DNP3.0, and IEC 60870‑5‑103 protocols for integration.

Q3: What is the operating temperature range?
The relay operates reliably from –40 °C to +70 °C, suitable for harsh environments.

Q4: Does it support waveform capture?
Yes, the relay includes event recording and waveform capture for fault analysis.

Q5: Is it suitable for industrial and utility feeders?
Yes, it is designed for both utility substations and industrial power distribution systems.