GE SR750-P1-G1-S1-HI-A20-R-E Feeder protection system

GE SR750-P1-G1-S1-HI-A20-R-E Feeder protection system

DESCRIPTION

The 750/760 Feeder Protection System is a digital relay intended for the management and primary protection and control of distribution feeders. This easy to use relay provides comprehensive protection functions for feeders and back up protection for bus, transformers and transmission lines in a draw out construction and at a reduced product life cycle cost.

BENEFITS

 • Easy to use Feeder Protection System supported by industry leading suite of software tools 

 • Accurate built-in metering functions - Eliminates auxiliary metering devices and reduces cost 

 • Improve uptime of auxiliary equipment - I/O monitoring 

 • Reduce troubleshooting time and maintenance costs - IRIG-B time synchronization, event reports, waveform capture, data logger 

 • Minimize replacement time - Draw-out construction 

 • Simplify testing - Built in simulation features 

 • Cost effective access to information. Supports industry protocols such as DNP & Modbus. Includes an optional 10MB Ethernet port for system integration 

 • Complete asset monitoring - Analog I/O, Full metering including demand & energy 

 • Leading edge technology - Flash memory for product field upgrade 

 • Extended life - Optional conformal coating for chemically corrosive and humid environments 

 • Globally accepted ensuring adherence to international codes and standards  

APPLICATIONS

 • Primary protection and control for distribution feeders on solidly grounded, high impedance grounded or resonant (Peterson Coil) grounded systems 

 • Bus blocking/Interlocking schemes 

 • High-speed fault detection for arc flash mitigation 

 • Throw over schemes (bus transfer scheme applications) 

 • Load shedding schemes based on voltage and frequency elements 

 • Back-up protection for transmission lines, feeders and transformers 

 • Distributed Generation (DG) interconnect protection

Protection and Control

The 750/760 Feeder Protection System is a digital relay intended for the management and primary protection and control of distribution feeders. This easy to use relay provides comprehensive protection functions for feeders and back up protection for bus, transformers and transmission lines at a reduced product life cycle cost.

Time & Instantaneous Overcurrent

The 750/760 has two phase TOC elements with level detectors for each phase. The 750/760 also has two overcurrent elements most commonly used for primary and back up protection.  Each TOC element has the following programmable characteristics: 

 • Pickup current level for trip,  alarm, or control 

 • Choice of 15 curve shapes (including FlexCurves) and curve multipliers 

 • Instantaneous or linear reset time characteristic 

 • Voltage restraint

Product Parameters and Specifications

Processor: 32-bit RISC processor

Clock frequency: 100 MHz

Memory: 128MB

Flash memory: 256MB

Communication interface: RS-232/485, Ethernet, etc.

Input/output interface: analogue input/output, digital input/output

Operating temperature: -25°C to +60°C

Storage temperature: -40°C to +85°C

Relative humidity: 5% to 95% (non-condensing)

Protection rating: IP65

Product specification: 300mm x 200mm x 100mm

Installation and Maintenance

Environmental conditions:

Ensure that the module is installed within the recommended temperature and humidity ranges and avoid direct exposure to water, oil, dust or electromagnetic interference.

Power Requirements:

Use a stable power supply to avoid damage to the module from voltage fluctuations.

Signal Cable Connection:

Connect the signal lines correctly to ensure the accuracy and stability of signal transmission.

Software Configuration:

Correctly configure the software parameters of the module according to the system requirements to ensure compatibility with other parts of the control system.

Maintenance and Inspection:

Perform regular maintenance and inspection of the module, including cleaning and checking the contact status of the connectors.

Precautions

Operator Training:

Operators should receive proper operation and maintenance training to avoid malfunctions or safety accidents caused by incorrect operation.

Technical Documentation and Safety Guidelines:

The technical documentation and safety guidelines provided by the manufacturer should be read and understood in detail before installation and use.

Compliance with safety procedures:

Observe all relevant safety procedures to ensure personal safety, especially when handling high-pressure or high-speed rotating equipment.