GE SR489-P1-HI-A20-E Multilin Generator Management Relay

GE SR489-P1-HI-A20-E is a Multilin SR489 generator management relay for synchronous generators. It integrates generator protection, metering, monitoring and control functions, providing differential, overcurrent, overvoltage and RTD thermal protection for small and medium generators.

This relay supports Modbus RTU communication, 12 RTD temperature inputs and oscillography fault recording. It adopts drawout panel mounting design, widely used in power, chemical and pulp & paper generator protection maintenance, spare replacement and control system retrofit projects.

Data Parameters

• 1. Brand: GE Multilin (GE Vernova).

• 2. Model: SR489-P1-HI-A20-E.

• 3. Product Type: Generator Management Protection Relay.

• 4. Application: Medium & small synchronous generator protection and control.

• 5. Feature: Integrated protection, metering, event & fault waveform recording.

• 6. Characteristic: Draw-out panel mount, 12 RTD temperature monitoring channels.

• 7. Communication: RS485 Modbus RTU, front RS232 service port.

• 8. Package: Panel drawout protection relay unit.

• 9. Mounting: Installed inside generator control & protection cabinet.

• 10. Operating Temperature: -40℃ ~ +85℃.

Core Functions

• 1. Provide generator differential protection, overcurrent, overvoltage, undervoltage and reverse power protection.

• 2. Monitor stator and bearing temperature via RTD sensors with thermal overload protection model.

• 3. Measure electrical parameters including voltage, current, active/reactive power and frequency.

• 4. Record fault oscillography, event sequence logs and alarm history for post-fault analysis.

• 5. Support remote parameter configuration and real-time data uploading to upper monitoring system.

Application Scenarios

• 1. Power plant small/medium generator protection relay spare replacement.

• 2. Petrochemical plant backup generator protection cabinet maintenance project.

• 3. Pulp and paper mill on-site generator automation control upgrade.

• 4. Heavy industry generator protection spare parts inventory backup.

• 5. Old generator multifunction protection relay renewal and retrofit.

FAQ

• 1. Q: What is GE SR489-P1-HI-A20-E?
      A: It is GE Multilin SR489 generator management relay, combining comprehensive protection, measurement and fault recording for synchronous generators.

• 2. Q: What protection functions does it include?
      A: Generator differential, overcurrent, overvoltage, reverse power protection and RTD thermal overload protection.

• 3. Q: Can it be hot swapped?
      A: Isolate CT/PT circuits and cut off power supply before pulling out the drawout unit; hot swap is not allowed.