I'm told that, traditionally, breaker specifications usually consider the thermal effects of the fault current.
I haven't done a lot of work with breakers, but I've recently done some work with specifying temporary grounds. One thing I'd recommend, based on what I learned doing the work with...
absolutely right (higher current + longer time).
At my facility, we've found the secondary of our station service transformers to be consistently one of the worst places for arc flash hazard.
We've added fusing on every transformer secondary to reduce the clearing time and/or limit fault current.
I'm not a thermal guy, but from what I understand, it could be detrimental to run steam generators (what I'm used to calling a turbo-generator), in an under-excited mode. To be clear, the convention I'm talking about is importing lagging VArs, or operating a generator with a leading power...
