GE Multilin 489 Relay | Generator Control and Monitoring Device

GE Multilin 489 Generator Management Relay – Product Description

Overview

The GE Multilin 489 Generator Management Relay is a comprehensive protection and control device designed for small and medium-sized generators. It delivers advanced generator protection, including stator differential, loss-of-field, and overload detection. Moreover, the relay integrates metering, monitoring, and communication capabilities into a single robust unit. Its rugged design ensures reliable operation in utility, industrial, and substation environments, making it ideal for mission-critical applications.

Technical Specifications

Attribute — Specification
Model Number — GE Multilin 489
Type — Generator Management Relay
Rated Voltage — 100–480 VAC/VDC auto-sensing
Current Inputs — 5 A nominal (1 A optional via firmware)
Protection Functions — Loss of field, negative sequence, phase loss, overload, ground fault, breaker failure
Control Outputs — 4 Form-C relays (8 A @ 250 VAC)
Accuracy — ±0.5% current, ±0.2% voltage
Communications — RS232, RS485, Modbus RTU, Ethernet/IP, DNP3
Event Recording — 1024 SOE entries; 64 digital + 40 analog disturbance channels
Operating Temperature — –40 °C to +85 °C
Certifications — UL 508, CE, IEC 60255
Enclosure Rating — IP52 front, IP20 terminals
Applications — Generator protection, industrial power systems, substation automation

FAQ

Q1: What is the primary function of the GE 489 relay?
It provides comprehensive generator protection, monitoring, and control under abnormal conditions.

Q2: Which communication protocols does it support?
The 489 supports Modbus, DNP3, RS232, RS485, and Ethernet/IP communications.

Q3: Is the relay suitable for industrial and utility environments?
Yes, it features a rugged design for reliable operation in harsh environments.

Q4: Can the 489 relay integrate with SCADA systems?
Yes, it allows seamless integration for remote monitoring and automation.

Q5: What protection functions are included?
It protects against loss of field, overload, phase loss, negative sequence, ground fault, and breaker failure.