The Torsional Stress Relay (TSR) is a digital protective relay that continuously monitors the turbine generator shaft for torsional oscillations, and provides trip output contacts when shaft fatigue reaches predetermined levels. Torsional event data capture is also provided.
The TSR is an updated digital version of the proven GE SMF relay. GE technology has been used since 1976 to protect turbine-generators exposed to risk of harmful torsional interaction.
The TSR is a complete cabinet, suitable for a generating station relay room or other room with a reasonably controlled environment.
Typical connections are:
Versions of the TSR are available that can protect more than one turbine-generator, for combined cycle plants or small units.