Re: Variacs - Overpowering an NST.

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Neil,

See Figure F in this sheet:

http://hot-streamer-dot-com/TeslaCoils/Misc/VarBack.jpg

It shows how much overload current you can put through a variac and for how
long and then how long it needs to cool down.

You can overload variacs substationally (with current but NOT voltage).
You just have to let them cool down.  A small fan blowing on it does
wonders.  You do have to be very careful not to burn the brushes.

Cheers,

	Terry

At 10:19 AM 2/16/2002 +0000, you wrote:
>Hi all,
>
>The first thing i'll say is I don't have a variac or NST, but I was just
>wondering - Variacs are commonly used to overpower and underpower equipment,
>check to see what their working range is. Would overpowering an NST kill it?
>If so, how far would an average 120/240 NST go overpowered?
>