Re: Ballasting a Pole Pig (Revisited)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "J. Aaron Holmes" <jaholmes@xxxxxxxxxxxxxxxxxx>

Understood, but really high (e.g., infinite) or really
low DC resistances measured on the HV winding would
certainly be a sign of something "bad" :)  That is all
I was getting at.

--- Tesla list <tesla@xxxxxxxxxx> wrote:

> Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>
>
>
> The DC resistance of the winding provides only a
> portion of the
> resistance. The inductive reactance of the xmfr
> provides the
> remaining resistance.
>
> Dr. Resonance
>
> >Sounds ok to me.  My 25kVA unit has LV about .06
> ohms
> >on each 120V winding, and 26.5 ohms across the HV
> >winding.
> >
> >Still, this doesn't rule out internal arcing.  If
> the
> >pig with ballast in series always seems to draw the
> >maximum amount of current permitted by the ballast
> >(even with nothing across the HV), the pig is
> probably
> >a goner.  Again, if you haven't already, I'd pop
> the
> >lid off and take a look inside.  If something's
> arcing
> >internally, chances are good that the oil will
> appear
> >murky, perhaps with ribbons of carbon or other
> debris
> >suspended in it.  Otherwise, you should be able to
> see
> >all the way to the bottom of the can, no problem.
> >
> >Here's a picture looking inside the can of a 25kVA
> >unit similar to my own which belongs to another
> local
> >coiler here in Seattle:
> >
> >http://silicon-arcana.com/inside_rte.jpg
> >
> >Oil is yellow in color, but very clear; you can see
> >all the way to the bottom of the can.
> >
> >Hope it ends up working!!
> >aaron
> >
> >
> >--- Tesla list <tesla@xxxxxxxxxx> wrote:
> >
> > > Original poster: Yurtle Turtle
> <yurtle_t@xxxxxxxxx>
> > >
> > > FWIW,
> > >
>
msnip...