Mike, are you sure about the 250000 Amps??
That is looks more like the 250MVA level of the 11 kV bus!!
If your supply transformer is 100 or 200 kVA you get in the 10's of kA's if the supply cable is heavy gauge and short.

You can't even protect that faultlevel with a 120 kA HRC fuse.

The product of rotation, excitation and flux produces electricty.