Circuit Breakers and Autoreclosing
Circuit Breakers and Autoreclosing
(OP)
Does the duty cycle of a circuit breaker have anything to do with autoreclosing? We have a CB with duty cycle of CO-15s-CO. We are to implement an autoreclosing scheme consisting of one fast reclosing of 0.5sec and one delayed reclosing of 15sec. I have been wondering whether the CB is suitable. It is a SF6 spring charged CB for an 11KV distribution line.
George.
George.






RE: Circuit Breakers and Autoreclosing
But are there not a part missing on your quote?
For a one shot it would look something like this:
O - 0.3s - CO
open on fault, wait 0.3 seconds, close once on fault, open (and lock-out)
For two shots it would look something like this:
O - 0.3sec - CO - 15 sec - CO
Open on a fault, wait 0.3 seconds, close again on the fault, open, wait 15 seconds, close for the second time on the fault, open.(and lock-out)
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RE: Circuit Breakers and Autoreclosing
RE: Circuit Breakers and Autoreclosing
Probably the best source will be the breaker manufacturer.
Enclose is generic information mostly from IEEE Std C37.
I hope this help.
RE: Circuit Breakers and Autoreclosing