alan mcneil
Member
- Location
- Massachusetts
At our facility we have Westinghouse circuit breakers that were installed about 30 years ago.
These breakers have an electronic sensor for instantaneous trip settings, most of the frames are for 600 amp and have a plug in "button" for 600 through 150 amps settings.
Lately we have had some of these breakers trip for no APPARENT reason, today a 200 amp breaker tripped.
The load on this breaker is only around 70 amps and all the connections are tight, this particular circuit breaker has been tested and calibrated just last month.
We have had this problem with other circuit breakers in this same MDP.
Grasping at straws for ideas.
These breakers have an electronic sensor for instantaneous trip settings, most of the frames are for 600 amp and have a plug in "button" for 600 through 150 amps settings.
Lately we have had some of these breakers trip for no APPARENT reason, today a 200 amp breaker tripped.
The load on this breaker is only around 70 amps and all the connections are tight, this particular circuit breaker has been tested and calibrated just last month.
We have had this problem with other circuit breakers in this same MDP.
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