instantaneous trip
instantaneous trip
(OP)
If a breaker trip on transformer inrush current just after closing, is it an arc flash hazard?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: instantaneous trip
David Castor
www.cvoes.com
RE: instantaneous trip
the status of your arc prot relay and also check your settings on your o/c and e/f protection relay there is a
possibility that your setting are too low on the relay.
RE: instantaneous trip
I think that if the circuit breaker tripped just after being closed there could be some answers, none related to arc flash:
1) The setting of the instantaneous is below the inrush current.
2) Sometimes, the instantaneous of ground elements is also tripped, it may be inrush or also a bad setting or even sometimes a wrong CT ratio.
Best Regards