Trip Circuit Supervision Relay Circuit Diagram Pdf. Fuse trip supply trip supply trip coil circuit breaker protection. If several branches of a circuit are to be supervised the required number of relays can be connected to the same control circuit.
The 7pa30 relay monitors the trip supply and correct state of fuses or miniature circuit breakers of the circuit. If the trip circuit opens or the trip supply fails relay a drops off and opens contact a1 to de energize relay c. The supervision function in three steady states of circuit breaker trip circuit is below image in normal condition the indicator led glows green and output relays are in picked up condition.
Relay b will detect trip circuit abnormalities with the circuit breaker open in a similar manner as relay a with the circuit breaker closed.
The supervision function in three steady states of circuit breaker trip circuit can be. The trip circuit supervision relay sper 1b1 c4 is used for supervising important control circuits such as circuit breaker and disconnector control circuits and signalling circuits in power electrical installations. The supervision function in three steady states of circuit breaker trip circuit is below image in normal condition the indicator led glows green and output relays are in picked up condition. Relay b will detect trip circuit abnormalities with the circuit breaker open in a similar manner as relay a with the circuit breaker closed.
