GE SR489‑P1‑HI‑A20‑E Multilin 489 Series Generator Management Relay

Product Overview

The GE SR489‑P1‑HI‑A20‑E is a high‑performance digital generator management relay from GE Multilin 489 series. It delivers comprehensive protection, precise metering, real‑time monitoring, synchronizing check and fault recording for synchronous and induction generators. Equipped with enhanced large LCD display, 1A phase CT secondary inputs, high‑range control power and configurable 4‑20 mA analog outputs, this unit is widely deployed for critical power generation assets to minimize downtime and improve power system reliability.

Series

489 Generator Management Relay Series by GE Multilin. This series is designed for medium‑to‑large generator sets, covering multiple hardware variants for different CT ratings, power supply ranges, analog output options and display configurations.

Product Features

Complete ANSI‑standard generator protection functions including generator differential, stator ground fault, loss of excitation, over‑/under‑voltage, over‑/under‑frequency, negative sequence, overload and breaker trip‑coil supervision
Enhanced large LCD front‑panel display for local reading, setup and troubleshooting
FlexLogic configurable logic for custom application logic
Built‑in event recorder and oscillography waveform capture for post‑fault analysis, IRIG‑B time‑sync supportedGE Vernova
Multiple communication interfaces: RS232, RS485, optional Ethernet; supports Modbus RTU, DNP3.0 protocols
4‑20 mA programmable analog outputs for transmitting metering values to remote systems
Supports RTD temperature monitoring for stator and bearing thermal protection, analog input for vibration monitoringGE Vernova
Panel‑mount or 19‑inch drawout rack‑mount mechanical design
Configuration via EnerVista 489 setup software

Product Parameters

Item	Value
Part Number	SR489‑P1‑HI‑A20‑E
CT Secondary Input	P1: 1 A nominal phase current
Control Power (HI)	70‑265 V AC / 90‑300 V DC, 48‑62 Hz
Analog Output	A20: 4‑20 mA programmable outputs
Display	E: Enhanced large LCD display
Digital Inputs	9 dry‑contact digital inputs
Programmable Relay Outputs	7 relay outputs, rated 5 A
Operating Temperature	-40 °C ~ +60 °C
Humidity	5‑95 % non‑condensing
Mounting	Panel mount / 19‑inch drawout rack mount
Weight	7.7 kg
Certifications	UL, CE, CSA compliant

Product Specifications

Protection response time: Fast trip for short‑circuit faults, configurable delay for other protection elements
Event recording: Timestamped event logs, disturbance waveform capture for fault diagnosticsGE Vernova
Metering: Voltage, current, power, power factor, frequency, thermal values
Software tool: EnerVista 489 for parameter setting, data viewing and firmware upgrade
Dielectric strength: 1.9 kV AC for 1 second, per UL 508 standard

Function

Multi‑element generator electrical fault protection
Real‑time electrical parameter measurement and thermal monitoring
Generator synchronizing check and breaker control supervision
Fault event logging, oscillography capture for post‑incident analysis
Local human‑machine interaction via front‑panel LCD
Remote data access and configuration over serial / Ethernet communication
4‑20 mA analog signal transmission to DCS / SCADA systems

Purpose

Protect synchronous and induction generators against electrical faults and thermal overload; provide operational metering, status monitoring and synchronizing control; record fault data to support maintenance and root‑cause analysis of power generation equipment.