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Re: new power transformer
From: "D.C. Cox" <DR.RESONANCE-at-next-wave-dot-net>
to: Dwight
I think Bill's listed xmfrs are also potential xmfrs which do require
external ballasting as Rich described.
DR.RESONANCE-at-next-wave-dot-net
----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Re: new power transformer
> Date: Wednesday, August 26, 1998 7:09 PM
>
> X-Envelope-From: gasman-at-althea.a-line-dot-net Wed Aug 26 16:05:30 1998
>
> > > Hi All,
> > >
> > > For the last 6 months or so I have been running my 3KW magnifier
system
> > > with and output varying from 4-6 feet. The problem is form marathon
runs
> > > my power transformers overheat and start smoking after 30 min. They
are
> > > two 5 KV 300 ma transformers put in series.
> > > I am ready to upgrade these to a potential transformer or a 5 kva
pig.
> > > My question is are the potential transformers current limited cores?
or do
> > > these also need ballasting to work.
> > > The reason for leaning more for the potential transformer is that
I
> > > like to keep the system portable and not everywhere I take it has 220
> > > available to me. Also the pigs tend to be very heavy and hard to put
on a
> > > truck.
> > > Could anyone give me advise either way.
> > >
> > > Thanks,
> > >
> > > Dwight Duncan
> >
> > A lightweight potential Xfrmer might be about 100 lbs. They are never
> current
> > limited like a NST and much be ballasted.
> >
> > Richard Hull, TCBOR
>
>
>
> Dwight, if you are interested in a higher voltage, higher power xfmr
> which *does* have the internal current limiting, you should look at
William
> Wysock's page at www.ttr-dot-com, under 'misc components.' He has two
dry-type
> xfmrs, 20 kV 2kVA, with these. They are a bit high ($280 each) - but
they
> have some pros, as well - like you don't have to worry about buying a
bunch of
> heating elements and building a big inductor (or kludging an old
arcwelder!).
> I found a real nice pig: rated 20.9 kV and 10 kVA - on the 280v outs on
my
> variac, it should be good for over 24 kV out and do maybe 20 or 30 kVA
for
> short spurts anyway. For this pig, I had to give $250 bucks, plus $75
> shipping - and now I have to screw with ballasting it. And I looked for
a
> while before I found it.
>
> So, you see, the choice is kinda hard.
>