The SR489 Generator Protection System, a member of the SR family of relays, provides protection, control and advanced communications in a cost effective industry leading draw-out construction. Designed for small and medium sized generators, the 489 delivers advanced protection including generator stator differential protection. The 489 also includes detailed diagnostic information allowing for reduced troubleshooting time.
Key Benefits
Complete, secure protection of small to medium sized generators
Easy to use generator protection supported by industry leading software tools.
Advanced protection and monitoring features including the use of RTDs for stator and bearing thermal protection and Analog Inputs for vibration monitoring
Draw-out construction allowing for minimized downtime and easy removal/installation of the 489 during maintenance routines
Large, user-friendly front panel interface
Enhanced generator troubleshooting through the use of IRIG-B time synchronized event records, waveform capturing, and data loggers
Simplified setpoint verification testing using built in waveform simulation functionality
Cost effective communication through industry standard hardware (RS232, RS485, 10BaseT Ethernet) and protocols (Modbus RTU, Modbus TCP/IP, DNP 3.0)
Harsh Chemical Environment Option
Key Features
Generator stator differential
100% stator ground
Loss of excitation
Distance backup
Reverse power (anti-motoring)
Overexcitation
Ground directional overcurrent
Inadvertent energization
Breaker failure
Stator and bearing thermal monitoring
Stator and bearing vibration monitoring
Negative sequence overcurrent
Protection & Control
The 489 Generator Protection System provides comprehensive protection, metering, and monitoring of small to medium sized synchronous or induction generators operating at 25, 50 or 60 Hz. The 489 is ideally suited for primary or backup generator protection as well as for use in cogeneration applications. Protection features found in the 489 include: