Re: Non ballasting a pig?

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

Original poster: "Crow Leader by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla-at-lists.symmetric-dot-net>

Why would it appear as a short unless you short the output windings?

The coil I'm working on will be DC powered so I don't have to play the
impedance matching and current limiting game with my polemount transformer.


KEN

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, October 14, 2002 9:32 PM
Subject: Re: Non ballasting a pig?


> Original poster: "Barton B. Anderson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>
>
> Hi Gregg,
>
> You "must" ballast the pig regardless. Connecting the pig without a
ballast
> will appear
> as a short circuit. These transformers will pull many times their rated
> amps in short
> circuit conditions. Take the recipricol of your percent impedance value
and
> mulitply by
> your rated amps. This will give you some idea of what the pig would try to
> draw. Your
> breaker would pop immediately.
>
> My pig is 1.9% imp 10kva/14.4kv.   So 1/1.9 = 52.6 x 41.67A = 2192A =
gotta
> use a
> ballast to limit current.
>
> Take care,
> Bart
>
> Tesla list wrote:
>
> > Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <network-at-neXband-dot-com>
> >
> > Hello list,
> >    I've been following some posts where ppl are talking about what it
> > takes to ballast a pig and was wondering this...
> >
> > I recently installed a new breaker box(200amp) in my house in which I
> > reserved a 100amp 240v breaker for my shop.  Is it possible that this
> > would be enough to power my 7.5kva pig without ballasts?  If I still
need
> > to, would one 3000w heater element be enough even though it's lossy?
I'm
> > not fortunate enough to have a stick welder, just a wire welder and the
> > water heater element is handy;)
> >
> > Thanks,
> > Gregg Adams
>
>
>
>