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what is the function of a Master
trip relay? why is it used ?
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Answer Posted / vinod
FUNCTION- Master trip relay 86 main function is to pick up the trip coil of the circuit breaker, relay 86 pick up if any of the protection relay of the respective feeder or equipment operate.
86 relay is a manual reset relay (its avoid multiple charging of the faulty system with unknown operators)
USAGE: The relay pick up through the protection relay contact(static or numerical) have less current rating, it can not carry the trip coil current of the circuit breaker
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