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Re: pfc



Original poster: "Rick Williams by way of Terry Fritz <twftesla-at-qwest-dot-net>" <richardwwilliams-at-earthlink-dot-net>


----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, November 21, 2001 10:46 PM
Subject: Re: pfc


> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Mddeming-at-aol-dot-com>
>
> In a message dated 11/21/01 8:36:00 PM Eastern Standard Time,
tesla-at-pupman-dot-com
> writes:
>
>
> >
> > Not at all if your NST has it built in, as some do (for instance,
> > Franceformer 15030 and 15060 don't, but 15030P and 15060P do).  I often
> > wonder if people aren't throwing PFC's onto NST's that already have them
> > internal.
> >
> >     - Bill Vanyo
>
>
>
> Hi,
> I believe that one way to be sure is to use a scope to check the phase
angle
> between input current and input voltage. Add capacitance as needed until
angle
> is minimized.
> If no scope is available, use an ammeter on the input line. Run voltage up
to
> just before the gap fires. Then add capacitance a little at a time until
the
> current is minimized These methods should give the right amount,
regardless of
> what's inside the "black boxes".
> Matt D.
>
>

Hi Frank,

I've just done that with Franceformer 15/30 NST. Both methods. I have a
bunch of GE run caps 12uF, 240vac. Found 8 of them in parallel do the job.
96uF, confiming the 100uF suggestion. Of course the NST was without any
internal PFC.

Rick W.
Salt Lake City