Re: variac find

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

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

Matt,

Nice find,

Yes, you can put the two 120V input variacs in series and run
them on 240V input, for 25 amps.  

240 volt variacs have more turns and/or larger cores.  The 
volts/per flux rule must always be followed to prevent 
core saturation.

John



>
> I do have several questions. These variaces are 25 amp 0-140v. what is the
> difference between a variac that can handle 120 and one that can handle
> 240v?
>
> These seem like they might be suitable for handling a 10 pva pig. if i
> hook them up in series then i can send the pig 240v -at- 25a, not near the
> pig's rating (which will be ok for a while). or i can give it up to 140v -at-
> 50 A which would allow me to give the 10kva pig plenty of current but only
> around half its voltage.
>
> Is there an idea i'm missing that would let me make the most of these
> variacs?
>
> -matt
>
>