Re: Pole pig control

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

Original poster: "Jason Johnson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <hvjjohnson13-at-hotmail-dot-com>


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, June 11, 2001 6:41 PM
Subject: Re: Pole pig control


> Original poster: "BunnyKiller by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<bigfoo39-at-telocity-dot-com>
>
> Tesla list wrote:
>
> > Original poster: "Fred Bultman by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <royaloakmin-at-home-dot-com>
> >
> > Hi, I have just purchased a 10 kva pig, a GE 3 stack 30 amp variac, and
a 100
> > amp contactor. I am planning on separating the stack and using two units
for
> > voltage control, and one as a variable ballast. Would one 30 amp variac
give
> > adequate control over a range of a range of about 3 to 15kva? The
variacs are
> > very heavy, so I don't they will have any problems with the current. I
am
> still
> > looking for some HEAVY line filters, big meters, a balancing choke, and
a
> large
> > cabinet if anyone has one. Does anyone have any advice on hooking this
up?
> > Thanks, Jim Bultman
> > P.S. If anyone wants huge variacs cheap contact CTR surplus in Ohio at
> > <http://www.ctrsurplus-dot-com/>http://www.ctrsurplus-dot-com/.
>
> Hi Jim....
>

I know what type of variacs Jim has (he has a stack for me that I need to go
pick up) They are rated for 30 amps each (they are rated at 480 in and 0-520
out, by the way), and there are three of these units in a stack (originally
connected for three phase).

Jason Johnson

> make sure the variac is rated for 30 amps EACH and not 30 amps for the
> total set...
> a 10KVA piggie will pull about 42 amps at rated load, 60 Amps for boosted
(
> 280V into the piggie)...
> best bet is to use the variacs in parallel setup to handle the voltage
> controlling and go with a
> ballast of some other design ( EI core and windings) to control the
current
> for an upper end limiter,
> you can vary the voltage and current inbetween the hi end output.
>
>
> see my web page for more info
>
> HTTP://members.telocity-dot-com/~bigfoo39/
>
>
>
> Scot D
>
>
>
>
>