GE 489-P1-HI-A20-E – Multilin 489 Generator Management Relay Module

Three main input types make up the 489-P1-HI-A20-E relay. These three types are analog, voltage, and digital inputs, all of which are vital to the operation of this device and have very specific characteristics. For example, the digital inputs, for which there are nine, can only be used in conjunction with dry contact connections. There is also a transistor output labeled as NPN which can be transferred to the assigned digital inputs as either a tachometer or counter. 

Features

• • Generator stator differential

• • 100% stator ground

• • Loss of excitation

• • Distance backup

• • Reverse power (anti-motoring)

• • Over excitation

• • Ground directional overcurrent

• • Inadvertent energization

• • Breaker failure

• • Stator and bearing thermal monitoring

• • Stator and bearing vibration monitoring

• • Negative sequence overcurrent

• • 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