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Re: pushing a variac



In a message dated 96-04-03 13:14:06 EST, you write:

>>        Can this transformer be operated at higher current levels than its
>28
>>amp design spec?  It has a 30 amp fuse, so this will obviously need to
>>go higher.  I would like to operate it intermittantly at 40-45 amps.
>>Would forced air cooling help?
>
>If you immerse it in transformer oil, you can usually double the amperage
>capacity of the variac.
>
>

Jerry,

 I am interested in how you came up with that data. I was thinking of 
cooling
my powerstat by blowing tons and tons of air past it.

I am wondering what other people have have done for cooling these 
powerstats,
and at how many amps do they actually melt?

Kevin M. Conkey