Re: Enough pork in this pig???

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

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>

Godfrey,

I'm confused. I understand a 12470Y is (12470/sqrt(3)) = 7200V single phase
(as the plate rating
identifies). At the rated 7.5kva / 7200v = 1.0417mA. With 240v applied, you
get 14.4kv at 30kva.
Granted, that might be pushing it a wee bit much and 170v input is a better
figure as it will double it
to 15kva. But how do you figure applying 415V? I don't think it can take
that much. Maybe I've missed
something here (wouldn't be the first time).

Bart

Tesla list wrote:

> Original poster: "Loudner, Godfrey by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>
>
> Hi Sean
>
> You can't get 12,470 volts from your transformer with 240 volts. But
> (12470x240) / 7200 = 415.6 volts will give 12,470 volts. Since pole pig
> cores are massively build, the core just might not go into saturation from
> applying 415.6 volts.
>
> Godfrey Loudner
>
> > -----Original Message-----
> > From: Tesla list [SMTP:tesla-at-pupman-dot-com]
> > Sent: Saturday, April 27, 2002 3:34 PM
> > To:   tesla-at-pupman-dot-com
> > Subject:      Re: Enough pork in this pig???
> >
> > Original poster: "Sean Taylor by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> > <taylorss-at-rose-hulman.edu>
> >
> > > Sure, it's fine. Plenty of voltage and juice. I would go with the 12470
> > > operation.
> > > Bart
> >
> > Can you actually change that? I thought that the 12470 was just the rating
> > if 3 transformers are used in a Y configuration . . . 7200 * sqrt(3) =
> > 12470.  I would think that 7200 V would be a little low, but would
> > definitely work.  And 7.5 kVA is plenty of power :-)
> >
> > ----------------------
> > Sean Taylor
> > The Geek Group
> > G-2 #1204
> > Because the geek shall inherit the Earth! (c)
> > www.thegeekgroup-dot-org
> >
> >
> >
> >