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Re: ballast

Original poster: "Daniel McCauley" <dhmccauley@xxxxxxxxxxxxxxxxxxxxxxxxxx>

And the question is . . .

Where can one find two 10kVA Supercil grade C cores?

Anyways, glad to see you back on the list.  Hope you are feeling better and
make a full recovery!

Dan


> You can use two 10 kVA Supercil grade C cores strapped together with
> stainless steel strapping (don't use steel or iron).  Cross section needs
to
> be approx 3 1/2 x  4 inches depending on the power level you intend to
> operate.  These cores are gapped with plastic or Nomex on both sides at
.080
> inches.  Total inductance required is around 140 mHy if you are running a
> variac for voltage control.  This requires approx 120-130 turns of 8 to 10
> AWG wound on an insulating box around the core.  Don't use 12 AWG as it
will
> overheat because the core is bumping up against saturation on it's current
> peaks.  Also a good idea to a small 100 CFM cooling fan across the reactor
> windings.  Space wind the windings with some 1/4 x 1/4 inch phenolic
sticks
> to provide good air circulation.
>
> We run this type of reactor at 7-12 kVA levels with our pole xmfrs.
>
> Dr. Resonance
>  >
>  > Can anyone please tell me how to design a ballast or
>  > what I could use as a ballast for a pole pig? E-mail
>  > me at  dimon20042004@xxxxxxxxx
>  >
>  > Thanks in advance:)
>  > Robert
>  >
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