Re: [TCML] pole pig ballasting

["David Rieben" <drieben@xxxxxxxxxxx>]

Scot,

Heh, heh, heh, I like the way you think ;^)
Of course, a typical residential electric
service couldn't "dish out enough" to
even come close to maxing out the po-
tential of a 50 kVA unit, though. I push
up to 90 amps at over 200 volts into my
Green Monster coil system and I use
just a 10 kVA piggie for my transformer.
It's never gotten the slightest bit warm
after even the longest high powered runs.....

David Rieben

----- Original Message ----- 
From: "bunnykiller" <bunnikillr@xxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Wednesday, July 16, 2008 9:12 PM
Subject: Re: [TCML] pole pig ballasting


> Hey Phil...
>
> you are correct in the 20+ sqr inches being over kill   but then again, he 
> does own a 50KVA polepiggie... I was thinking ahead when he decides to 
> "use what he has" to full potential...
>
> Scot D
>
>
>
> FIFTYGUY@xxxxxxx wrote:
>
> > In a message dated 7/16/08 3:11:02 P.M. Eastern Daylight Time, 
> > bunnikillr@xxxxxxx writes:
> >
> >
> > > there are several methods of ballasting a piggie, the best I have  seen 
> > > so far is to use an EI frame with about 18 -20 sqr inches on the  middle
> >
> >
> > > column for 30A worth of capacity
> >
> >
> >    I made my ballast by cutting up a 3-phase 25kVA  drive isolation 
> > transformer for the metal. I made the core dimensions 3 inches  by 3.5 
> > inches. That's 10.5 square inches. My ballast core stays cool,  even 
> > during 60A runs. The windings get a little warm, but I went cheap and 
> > used four parallel windings of 12ga THHN. My point is, 20 square inches 
> > seems like a lot of  overkill for only a 30A ballast. You shouldn't need 
> > that much iron!  Even if you used mild steel, it has a low permeability 
> > but  it takes a lot to saturate it.  -Phil LaBudde
> >
> > Center for the Advanced Study of Ballistic  Improbabilities
> >
> >
> >
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