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GE SR489-P5-HI-A20-E Generator Management Relay

GE SR489-P5-HI-A20-E is a Generator Management Relay (GMR) manufactured by GE Multilin, and it belongs to the GE 489 Generator Protection Series.

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GE SR489-P5-HI-A20-E

GE SR489-P5-HI-A20-E is a Generator Management Relay (GMR) manufactured by GE Multilin, and it belongs to the GE 489 Generator Protection Series.

Core Functions and Features

Comprehensive Protection:

  • Integrates multiple protection functions, including overcurrent, undercurrent, overvoltage, undervoltage, frequency deviation, phase unbalance, and ground fault protection.

  • Continuously monitors critical generator parameters such as current, voltage, frequency, and power. If any parameter exceeds safe limits, the relay immediately initiates a trip or alarm to prevent equipment damage.

Control and Monitoring:

  • Supports generator start/stop operations, transfer functions, and control of contactors/relays.

  • Equipped with a graphical LCD display (40 characters or larger), providing clear visualization of operating parameters, fault information, and event records for easy on-site diagnostics.

Communication Interfaces:

  • Features RS232/RS485 communication ports and supports Modbus RTU/TCP protocols.

  • Compatible with GE Fanuc FIX HIM/SCADA systems and other industrial protocols, enabling seamless integration into remote monitoring and control systems.

User-Friendly Design:

  • The front panel includes a numeric keypad, status indicator LEDs, up/down navigation keys, and a sealed pull-out handle.

  • Easy configuration and operation, with support for standalone programming and parameter setting (Setpoint Access).

Main Technical Specifications

  • Input Voltage: 90–300 VDC / 70–265 VAC (wide-range input); some variants support 120 VAC, 60 Hz.

  • CT Rating: 5 A phase CT auxiliary inputs.

  • Outputs: 4–20 mA analog outputs, programmable relay outputs, and dry-contact digital I/O.

  • Operating Environment: Suitable for industrial environments from −40 °C to +70 °C; some models are designed for integrated management of medium-voltage generators.

Typical Applications

Widely used in power plants, substations, captive power systems, marine generator sets, and industrial facilities to monitor and protect generators and ensure the safe operation of electrical power systems.

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