Overview
Manuals
Principle
Application Overview
Features:
- SR489 489 Generator Management Relay System
- This relay features a 5A phase current transformer secondary side
- The 489-P5-HI-A20-E relay is equipped with an enhanced display screen
The Model 489 generator management relay is a microprocessor-based relay designed for the protection and management of synchronous and induction generators. The Model 489 relay features six output relays for tripping and alarms. Generator protection, fault diagnosis, power metering, and RTU functions are integrated into an affordable, removable package.
Fault diagnosis is provided through pre-trip data, event logging, waveform capture, and statistics. Before issuing a trip command, the 489 takes a snapshot of the measured parameters and stores it in the log along with the trip cause. This pre-trip data can be viewed using the "Next" key or by accessing the last trip data on page 1 of the "Actual Values" section before the trip is reset. The event logger can store up to 256 events with timestamps and dates, including pre-trip data.
The 489-P5-HI-A20-E General Electric Generator Management Relay may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
General Electric 489-P5-HI-A20-E Generator Management Relay datasheet(manual), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
The Type 489 equipment employs high-speed analog-to-digital conversion technology to obtain precise electrical signals from the generator. These signals are processed by a built-in microprocessor, which runs advanced protection algorithms capable of detecting abnormalities such as overcurrent, differential faults, loss of excitation, or voltage imbalance. Once a fault or operational anomaly is detected, the equipment immediately triggers protective measures, such as tripping the circuit breaker, issuing an alarm, or adjusting the generator output, thereby ensuring that the generator is isolated or controlled to prevent damage.
This relay is typically installed in the generator control panel, providing comprehensive protection against electrical faults and abnormal operating conditions. Key applications include:
Generator Protection: Protection against overcurrent, overvoltage, undervoltage, and frequency fluctuations.
Thermal Monitoring: Monitoring stator and bearing temperatures using an RTD (Resistance Temperature Detector) input.
Power Management: Integrated voltage, current, and power parameter metering functions, supporting real-time system diagnostics.
Fault Analysis: Features data logger, waveform capture, and event logging functions for post-fault troubleshooting.
