Re: Electrical Interlocks
Indeed, all the backup systems I have worked with have both electrical and mechanical locks to prevent this happening. It's a Very Bad Thing (TM).
I have seen a photo of what happens if you connect 1MW of diesel gen-set to the grid without syncing the phase. The result is that the stator (there's a clue in the name) rotates by the phase difference.
Biting the hand that feeds IT
