Description
Product Overview
The GE SR750-P5-G1-S1-HI-A20-R is a feeder management relay from the GE Multilin 750 series of distribution protection products. It integrates comprehensive protection, metering, control and automation functions into a single panel-mount unit, purpose-built for medium-voltage distribution feeders and switchgear bays.
This specific configuration features 5A phase current inputs, 1A ground current input, monochrome graphical LCD display, dual Ethernet + RS-485 communication and a standard rack-mount case. It supports directional overcurrent, ground fault, voltage and frequency protection, plus built-in programmable scheme logic for custom automation sequences. With wide temperature tolerance and robust enclosure design, it delivers reliable performance in both utility substations and harsh industrial electrical environments.
Core Product Features
- Complete overcurrent protection including instantaneous, time-delayed, directional phase and sensitive ground fault elements
- Voltage and frequency protection with negative sequence detection and broken conductor monitoring
- Built-in Programmable Scheme Logic (PSL) enables custom control sequences without an external PLC
- Class 0.2 accuracy metering for voltage, current, power, energy and power quality parameters
- Dual Ethernet ports plus RS-485 serial interface support Modbus TCP/IP, DNP 3.0 and IEC 61850 protocols
- Monochrome graphical LCD display with keypad provides local configuration, status monitoring and event logging
- 8 programmable digital inputs and 6 form-C output relays for flexible field device integration
- -40°C to +70°C operating range with IP54-rated enclosure for outdoor and industrial deployment
Technical Specifications
| Item | Specification |
|---|---|
| Official Model | SR750-P5-G1-S1-HI-A20-R |
| Product Type | Feeder Management Protection Relay |
| Phase Current Input | 5 A nominal, 3-phase |
| Ground Current Input | 1 A nominal |
| Power Supply | 120–240 V AC / 125–250 V DC wide range |
| Nominal Frequency | 45–65 Hz, auto-sensing 50/60 Hz |
| Protection Elements | Phase/ground overcurrent, directional overcurrent, under/over voltage, under/over frequency, negative sequence, broken conductor |
| Digital I/O | 8 programmable digital inputs; 6 form-C output relays |
| Communication Ports | 2× Ethernet, 1× RS-485 |
| Supported Protocols | Modbus TCP/IP, Modbus RTU, DNP 3.0 Level 2, IEC 61850 |
| Display | Monochrome graphical LCD with keypad interface |
| Operating Temperature | -40°C to +70°C |
| Enclosure Rating | IP54 |
| Mounting | 19″ rack mount / panel mount |
| Certifications | CE, UL, cULus, IEC 60255 |
Application Fields
- Medium-voltage feeder protection and automation in utility distribution substations
- Industrial plant power distribution and switchgear control systems
- Renewable energy grid interconnection protection (solar, wind, distributed generation)
- Oil, gas and petrochemical facility power distribution and load management
- Commercial building and campus electrical distribution systems
- Legacy electromechanical relay retrofit and distribution system modernization
Related Model Recommendations
- SR760: High-end feeder management relay from the same 7-series platform, with enhanced protection, expanded I/O and advanced power quality features
- F650 Feeder Protection Relay: Multilin 650-series bay controller relay for advanced distribution automation and SCADA integration
- SR750-to-850 Upgrade Kit: Field upgrade package to migrate SR750 relays to the 850-series next-generation platform
- 469 Motor Protection Relay: Multilin motor protection relay for feeder-connected medium-voltage motor applications
