RE: Greg's MOT New Stack (artwork, ballast explanation, etc.)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Dave Hartwick by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ddhartwick-at-earthlink-dot-net>



-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Friday, September 13, 2002 10:21 PM
To: tesla-at-pupman-dot-com
Subject: RE: Greg's MOT New Stack (artwork, ballast explanation, etc.)


Original poster: "Gregory Hunter by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<ghunter31014-at-yahoo-dot-com>


> Is anybody ballasting their MOT supplies? I'm not

Yes. I am.
>>>>>
Yes Greg, I do now recall your capacitive ballast
>>>>>

> sure I understand the
> necessity of the huge capacitances. Problems with

Because I'm running four (4) MOTs capable of drawing
over 6kva from a single 20 Amp outlet. Without
ballasting, the breaker trips within seconds, which is
a good thing, since the light-duty power cord would
probably melt within a minute if the breaker didn't
intervene.

The HV-side ballast capacitors are not huge. They are
actually kind of small--only .97uF/2200wvac each. I
run 6, 8, or 10 of them in series with the high
voltage circuit to limit the current IAW the
capacitive reactance formula.

> power arcing? Perhaps MOT
> power is stiffer than even Pole distro xfmr power? I

Not likely. A pole transformer can run at two or three
times its rated load without breaking a sweat. A used
5kva pole pig can beat up a MOT stack with one bushing
tied behind its back.
>>>>>
I'm thinking about % impedance. Some guys are saying big tank capacitance
and high break-rates are necessary with MOT power. This does not seem to be
the case with Pole xfmr power and I'm wondering why.
>>>>>

> would think some series
> resistance on the HV side would help.

Help with what?
>>>>>
That is just one example of ballasting methods. Help with power arcing, or
whatever is forcing some coilers to resort to large C and breakrates.
Dave H
>>>>>

> Dave H
>
>
>
> Cheers,
>
> Andy C.
> Internet Homepage: http://users.rcn-dot-com/tcobaugh/
>

Best Regards,


=====
Gregory R. Hunter

http://hot-streamer-dot-com/greg