400 Hz/60Hz Re: Vicious Cycle! (fwd)

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Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>


> What's the difference between a 400hz Variac and a 60hz

> Variac?

	Mostly:
	core material and core size.

> Besides the obvious!! :o)
 
> Can a 400hz model be used on 60hz lines?
	Sort of.

	In general 400 Hz gear CAN be used BUT at vastly
	reduced volatage ratings.  (roughly: the limiting
	factor is CURRENT rating, to keep THAT the same,
	when a 400Hz nominal design is used on 60, that means
	applying less voltage.

	There is a 'rule of thumb' which i forget.
	Maybe:
		1/2 the 400 Hz nameplate voltage at 60 Hz can
		be applied.
	But i can't swear to that.
	Hopefully someone has this factoid to hand...

	best
	dwp

...the net of a million lies...
	Vernor Vinge
There are Many Web Sites which Say Many Things.
	-me