GE 489-P5-LO-A20-E Generator Management Relay

GE Multilin 489-P5-LO-A20-E Generator Protection Relay

General Information

• Part Number: 489-P5-LO-A20-E

• Manufacturer: GE Multilin / GE Grid Solutions

• Series: 489 Generator Management Relays

• Country of Origin: Canada

• Form Factor: Draw-out case (included if specified on quotation)

• Weight: Approx. 10 lbs

Application

The 489-P5-LO-A20-E is a generator protection relay designed for use with both induction and synchronous generators. It provides advanced protection, monitoring, and control functions for generators operating at 25, 50, or 60 Hz, making it ideal for utility and industrial applications.

Key Features

• Generator Protection: Includes phase and ground overcurrent, reverse power, loss of excitation, low forward power, and more.

• Advanced Thermal Model: Multiple RTD support for accurate thermal monitoring of the stator.

• Event Analysis Tools: Integrated waveform capture, event logging, and data logging to reduce troubleshooting time.

• Flexible Communications: Dual RS485 ports supporting Modbus RTU and DNP 3.0 (up to 19200 bps), with optional Ethernet and DeviceNet interfaces.

• Built-In Simulation Functions: Simplifies testing and commissioning.

• Draw-Out Construction: Enables quick replacement and maintenance.

• Field-Upgradable Firmware: Supports long-term lifecycle maintenance.

• Asset Monitoring: Real-time monitoring of temperatures, analog inputs, energy demand, and status data.

User Interface & Front Panel

• Display: 40-character LCD for setpoints, diagnostics, and values.

• Controls:

• Numeric keypad

• Status and navigation LEDs

• Menu and control buttons (Reset, Enter, Menu, Up, Down)

• RS232 front port for local configuration

Back Panel I/O & Connectivity

• RTD Inputs: 12 field-programmable RTD inputs

• Analog I/O: 4 isolated 4–20 mA inputs and outputs

• VT Inputs: 4 voltage transformer inputs

• CT Inputs: 7 current transformer inputs (phase, neutral, and ground sensing)

• Digital Inputs: 7 assignable digital inputs

• Output Relays: 6 programmable outputs

• Communications:

• 2 x RS485 ports (Modbus RTU / DNP 3.0)

• Optional Ethernet and DeviceNet ports

• Pulse Output Width: 200 to 1000 ms (configurable)

• IRIG-B Input: Amplitude modulated, 2.5–6.0 Vpk-pk at 3:1 signal ratio

• Tachometer Input: Configurable via digital inputs 4–7

• Grounding: Separate safety and filter ground

• Environmental Compliance: Meets SWC, C37.990 EMI/RFI standards

• Pollution Degree: II

• Harsh Environment Coating: Not available on this model

Protection Functions

• Phase Overcurrent: With programmable fixed characteristic and voltage restraint

• High-Set Overcurrent: Configurable for trip

• Low Forward Power: Programmable delay (0.2 to 120.0 s in 0.1 s steps)

Conclusion

The GE Multilin 489-P5-LO-A20-E is a robust and versatile generator protection relay offering extensive I/O, advanced diagnostics, and communication options. Its modular, user-friendly design supports high availability, easy commissioning, and simplified maintenance — making it a trusted choice for power generation facilities worldwide.