RPR-2 relay is used in brushless and thyristor excitation systems of generators.
The purpose of the relay is:
in thyristor excitation systems of STS:
-protection against rotor winding overload;
-protection against forcing of inadmissible duration;
-protection against unlimited boost;
-protection against unsuccessful inverting;
-protection against loss of excitation;
-maximum current protection of the rectifier transformer;
-current cut-off of the rectifier transformer.
in static standby thyristor excitation systems STSR - the same as for STS, but with rotor current scaling depending on the type of connected generator (G1...G4).
in brushless excitation systems - the same as for STS, except for rectifier transformer protections.
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