It's a 1,200 amp, 3phase GFCI that's designed for "personnel protection"? Does that mean that it has 5mA trip level, I thought that was impossible. And if it doesn't, how is it still for personell protection...?
Bender makes some rather unusual GFI units, including ones for DC and high frequency AC. No doubt they can make such a thing as a 5mA 1200A GFI.
We use one model to detect faults on 1000 Hz systems. It is configured for the European level of personell protection, 30 mA, but I don't think there is anything to prevent it being made for the American 5 mA level instead. The unit comes with a separate "donut" and doesn't have a rated current, only a maximum fault current. (14 kA if memory serves me)
[This message has been edited by C-H (edited 06-07-2005).]