> Josh,
>
> Why not get a 1 ohm or likewise crazy low value resistor, and then
> measure the voltage drop across it?  It doesn't take that much to
> measure 600V...600A across 1 ohm would give you that.  If you can find
> an accurate ohm meter then you're good to go (i.e. count resistance of
> wires, etc.).

It would also give you 360,000 watts! That would be one pretty amazing
resistor!

At these currents, for AC circuits, the usual technique is a current
transformer (aka CT).

Bob Ammerman
RAm Systems

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