starsandstripes
Member
- Location
- SE Michigan
I recently had an incident where a Bulldog Pushmatic circuit breaker failed to trip in a phase to neutral fault condition. Was this an isolated defect or does Pushmatic have a history of this?
Pushmatic circuit breakers
- Thread starter starsandstripes
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al hildenbrand
Senior Member
- Location
- Minnesota
- Occupation
- Electrical Contractor, Electrical Consultant, Electrical Engineer
Re: Pushmatic circuit breakers
The Bulldog Pushmatics I've known in fault situations have behaved themselves. This is a highly subjective statement, however, as I have never had much of an idea of the actual fault current levels at the time of the fault.
The Bulldog Pushmatics I've known in fault situations have behaved themselves. This is a highly subjective statement, however, as I have never had much of an idea of the actual fault current levels at the time of the fault.
charlie tuna
Senior Member
- Location
- Florida
Re: Pushmatic circuit breakers
we serviced a commercial building that had these in it's original construction specs. built in the late fourties! i have never had a problem such that you discribed. there are bad breakers in all the manufacturers lines that i have come across during my career in the electrical industry. and i have found them in single pole-two pole and three pole configurations..... and the pushamatic breakers are still available!!
we serviced a commercial building that had these in it's original construction specs. built in the late fourties! i have never had a problem such that you discribed. there are bad breakers in all the manufacturers lines that i have come across during my career in the electrical industry. and i have found them in single pole-two pole and three pole configurations..... and the pushamatic breakers are still available!!
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
Re: Pushmatic circuit breakers
things fail, especially old things.
i would not be concerned about a single failure. there could be other reasons it did not trip that are not the fault of the breaker itself (like a poor ground fault path).
without better information on what happened, it is hard to fault any one thing.
things fail, especially old things.
i would not be concerned about a single failure. there could be other reasons it did not trip that are not the fault of the breaker itself (like a poor ground fault path).
without better information on what happened, it is hard to fault any one thing.
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