GE SR760 (Material Number: 1219-0003) Feeder Integrated Protection and Monitoring Device
I. Basic Product Information
Brand: GE Vernova (formerly GE Multilin)
Product Series: 750/760 Series Feeder Management Relay Protection Device
Material Number: SR760, 1219-0003 (Complete Machine Configuration Code, including CPU motherboard, human-machine panel, I/O circuits, communication hardware as a complete configuration)
Product Status: The original factory has discontinued production. It is a classic legacy relay protection device for power systems. The market mainly consists of new inventory and dismantled spare parts. The upgrade replacement model is GE 850 Series Protection Device.
Position: Integrated device for main protection, measurement and control, and fault recording of medium and low voltage switch cabinets and substation distribution lines. It can achieve line protection, circuit breaker control, electric metering, fault event recall, and remote four remote uploads.
Core Protection Functions
1. Current-based Protection
Instantaneous / Time-Limited Overcurrent, Anti-Time-Limited Overcurrent Protection
Directional Overcurrent, Negative Sequence Overcurrent (Three-Phase Unbalance Protection)
High Resistance Sensitive Ground Fault Protection, Zero Sequence Overcurrent Protection
Breaker Failure Protection, Cold Load Start Lockout
2. Voltage / Frequency-based Protection
Overvoltage, Undervoltage, Overfrequency, Low Frequency Load Shedding, Three-Phase Voltage Unbalance Protection; It can realize low-voltage automatic reclosing, automatic reclosing after fault (up to 4 times logic) for GE Vernova.
3. Auxiliary Protection and Control Logic
Synchronous Grid Connection Detection, Reverse Power Protection, Fault Recording, SOE Millisecond-level Event Sequence Recording, 16 Groups of Customizable Programmable Logic, Supports Local / Remote Circuit Breaker Opening and Closing Control.
Hardware I/O Configuration (Standard Hardware Specifications for 1219-0003)
Analog Input
Three-phase Current, Three-phase Voltage, Zero Sequence Current, Supports CT Secondary 1A/5A Connection, PT 100V Voltage Sampling, Measurement Accuracy 0.2 Class, Metering 0.5S Class.
Switching Input DI: Up to 14 Remote Signal Contacts, Collecting Circuit Breaker Position, Isolating Switch, Protection Plate, Local / Remote Switching Signals, etc.
Relay DO Output: 6 Sets of Conventional Auxiliary Relays, Special Trip / Close Large Power Relays (Contact Capacity: Trip Circuit 20A Continuous), Can Drive Circuit Breaker Trip, Alarm, Lockout Signals.
Optional Analog Output: Up to 8 Sets of 4-20mA Transmitter Output, Upload Current, Voltage, Power, etc. Analog Quantities to DCS System.
Communication and Human-Machine Interface
Front Panel LCD Backlight Display: 40-character large screen, Local viewing of current, voltage, power, electricity, fault messages, setting parameters, local setting of values, fault reset.
Standard Communication Interfaces
RS485: Modbus RTU, DNP3.0 Protocol
Optional Ethernet Module: Modbus TCP, IEC60870-5-104 Telecontrol Protocol
IRIG-B Time Synchronization Interface, Supports Millisecond-level Precise Time Synchronization, Ensuring Unified SOE Time Sequence for the Entire Station, GE Vernova.
Front RS232 Debug Port: Computer Local Download of Settings, Upload of Fault Recording Waveforms, Firmware Upgrade.
Electrical and Environmental Parameters
Control Power Supply: DC 48/110/220V, AC 110/220V Wide Range Available
Operating Temperature: -20℃～+70℃; Storage Temperature: -40℃～+85℃
Protection: Front Panel IP54, Cabinet Internal IP20; Optional Three-Defense Coating, Suitable for Coastal, Chemical Corrosion Working Conditions. Installation method: 1/4 19-inch plug-and-pull frame installation, allowing for plug-and-remove replacement of protection modules without power outage, reducing maintenance downtime.
Certification: UL, CSA, CE, IEC power safety certification
Core data functions
High-precision electric energy measurement: cumulative forward/reverse active/reactive power, time-of-use demand statistics.
Fault recording: multi-week waveform storage before, during, and after faults, used for accident fault traceability analysis.
SOE event recording: millisecond-level recording of protection actions, position changes, and alarm events, with the ability to store up to thousands of historical events.
4 independent setting groups, allowing for one-click switching of protection settings based on season and operation mode.
Typical application scenarios
Urban substations, industrial and mining enterprises 10kV/35kV distribution feeder protection
Chemical plants, power plants, coal mine utility high-voltage switch cabinet line protection
Busbar section protection, station transformer backup protection, small-scale photovoltaic connection point line protection
Renovation of old substations integrated automation systems, replacement of old GE protection spare parts for operation and maintenance scenarios
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