I have LV breaker.
I have tested these breaker with both primary and secondary injection testing and all pass.
Now there are setting on the breaker that need to change. example INST need to change from 12x to 4x. Or STPU need to change from 6 to 8 etc.
my question is do i need to retest...
I have a feeder that draws 900A continuously
I specified 1000A 100% rated LSIG breaker.
The submital i am reviewing calls for a 80% rated 1200AF with a 1000AT LSIG trip unit.
Never really thought about it before but is the breaker rating (100% rated VS 80% rated) for the frame or the trip...
Lets say I have a switchboard that requires ONLY 3 Phase loads, transformer, UPS, Motors, ETC. ( no neutral is required at all)
Now lets say I am feeding this from a generator where I have 4 wires from the alternator ABCN connected to the aforementioned switchboard.
the N of the generator...
