a 3ph 480v motor tripped a breaker.a worker saw this and re-set the breaker.a short time the worker saw the breaker tripped again and tried to re-set the breaker.at this time the panel exploded knocking the worker to the ground.he recieved a severe electrical shock and burns which hospitalized him and put him in a burn unit. how many times must a breaker trip before you call an electrican? 2 sure isnt good.
You did not include enough information to provide an answer which is applicable to your situation.
Circuit breakers are tested and then listed based on: Rated voltage Applied voltage Frame size Trip unit type Rated continuous current Applied continuous current Rated short circuit fault current Applied short circuit fault current Short circuit impedances Type of fault (i.e. bolted, three phase) Number of poles clearing the fault
Also you need to include the electrical and mechanical history of your breaker. This history should include the number of no-load operations, the number of full-load operations, and the number of short circuit operations.
In general, I believe breakers are only "rated" for 2 operations at their maximum short circuit rating.
Re: tripped breaker re-setting#128740 11/14/0310:52 AM11/14/0310:52 AM