Re: Ballasting a Pole Pig (Revisited)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Chip Atkinson <chip@xxxxxxxxxx>

That sounds like you have the welder in parallel rather than in series
with the pig to me. If you have the pig disconnected you should see the
full 220V on the pig inputs and no current should flow since it's an open
circuit.  With the pig connected, you should then see some current flowing
but until you draw some current from the secondary (output) of the pig you
should see very little.

Here's ascii art of the circuit that you should have:

I--| |-----W----|
   V=           P
I--| |----------|

I is the input, V is the variac, W the Welder, P the pig.
Notice that the welder is connected in series with the pig.
Hope that helps.

Chip

On Sun, 8 Jan 2006, Tesla list wrote:

> Original poster: "C. Sibley" <a37chevy@xxxxxxxxx>
>
> This weekend I did as suggested below and had
> unsucessful results.  With the pig set up as a Jacobs
> Ladder, and the welder set on the highest power
> setting, I was unable to get any spark from the pig at
> all.
>
> The problem appears to be the welder taking all of the
> power, input voltage to the pig is only 25V with the
> welder on and running.  I do not have an AC Ampmeter
> so am uncertain of the current, but was tripping my
> bbreakers after only 1-2 seconds.  Setting the welder
> at a lower rating would allow the breakers to remain
> on, but with essentially no voltage to the pig.
>
> One posibility, is that my welder is an AC/DC unit,
> and must have additional circuitry over a basic AC
> unit.  Perhaps there is some PFC or something
> interfering?
>
> Interested in any advice.
>
> Thanks,
>
> Curt.
>
>
> --- Tesla list <tesla@xxxxxxxxxx> wrote:
>
>  > Original poster: "David Rieben"
>  > <drieben@xxxxxxxxxxxxxxx>
>  >
>  > Curt,
>  >
>  > You've pretty much got the right idea ;^) I assume
>  > that
>  > you have a 240 volt input stick welder, like one of
>  > those red Lincoln
>  > 225 amp arc welders? You simply series the input
>  > leads to the low
>  > voltage bushings of the pig with the po-
>  > wer input plug of the welder. For maximum output
>  > current,
>  > you short the welding leads together and turn the
>  > amperage
>  > selector switch all the way up to the maximum
>  > amperage setting. Be
>  > sure to the connect the 240 volt input leads
>  > to the two outermost low voltage busings on the side
>  > of the
>  > pole pig tank. Leave the center low voltage bushing
>  > uncon-
>  > nected as this will be the tank case ground
>  > (assuming your pig is a
>  > single phase, 120/240 volt output unit). This setup
>  > will allow you to
>  > draw 50 to 70 amps from the 240 volt ser-
>  > vice with the HV output bushings of the pig shorted.
>  >
>  > Good luck,
>  > David
>  >
>  >
>  > ----- Original Message ----- From: "Tesla list"
>  > <tesla@xxxxxxxxxx>
>  > To: <tesla@xxxxxxxxxx>
>  > Sent: Monday, December 19, 2005 3:45 PM
>  > Subject: Ballasting a Pole Pig
>  >
>  >
>  > >Original poster: "C. Sibley" <a37chevy@xxxxxxxxx>
>  > >I'm considering making the move to a Pole Pig since
>  > >I'm having a hard time finding anything larger than
>  > a
>  > >60 mA NST.  I have a old stick welder that I'm
>  > >considering using as a ballast, but am not 100%
>  > sure
>  > >how I should go about hooking it up.  Do I just use
>  > >the power inputs and run it in series with the pig?
>  > >Do I need to terminate the "welding" output?  Does
>  > it
>  > >matter what setting the welding output power is set
>  > >to?
>  > >Thanks,
>  > >Curt.
>  >
>  >
>
>
>