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Re: Dr R's 16KV 300ma transformer - OT to a 4 pack's current draw
Original poster: "Hydrogen18" <hydrogen18-at-bellsouth-dot-net>
I am waiting for my variacs to arrive(2x 6 kw for $14 total)so I can do a
full 240 sweep of voltage. I guess then I can see how what it looks like on
a graph. Btw, on an amp meter with a 5 amp movement how do I wind a
transformer and connect it to the meter to show 1 amp of movement for every
10 amps drawn?
---Eric
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, August 02, 2004 8:36 PM
Subject: Re: Dr R's 16KV 300ma transformer
> Original poster: "S&JY" <youngsters-at-konnections-dot-net>
>
> My 4-MOTs, with primaries all in parallel, no PFC and no load, draw 17.6
> amps at 118 v, which is about 2 KVA. The secret with MOTs is to run them
at
> 105 volts or less to get the cores out of semi-saturation. My 4 draw 7.5A
> at 105V. Yes, MOTs typically are iron deficient.
> --Steve Y.
>
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Monday, August 02, 2004 8:08 AM
> Subject: RE: Dr R's 16KV 300ma transformer
>
>
> > Original poster: "David Trimmell" <humanb-at-chaoticuniverse-dot-com>
> >
> > Eric; 1.6KW is a lot of heat. Something isn't right, that's beyond a
> > power-factor issue, I think. These are MO tranies? If so, they are
> > seriously iron deficient so I would expect them to pull a lot of
> > current, but not close to what you mention.
> >
> > Regards,
> >
> > David Trimmell
> >
> > -----Original Message-----
> > From: Tesla list [mailto:tesla-at-pupman-dot-com]
> > Sent: Sunday, August 01, 2004 6:15 PM
> > To: tesla-at-pupman-dot-com
> > Subject: Re: Dr R's 16KV 300ma transformer
> >
> > Original poster: "Hydrogen18" <hydrogen18-at-bellsouth-dot-net>
> >
> > I guess shunted transformers can be done right(although the only other
> > kind
> > I can think of are welders, which dont really matter much as long as
> > they
> > burn well). But with my 4 pack I have a HUGE magnetizing current(1600
> > watts!). I guess part can attributed to bad power factor and the fact
> > that
> > the cores are running at 70000+ lines of flux per sq inch. But why dont
> > all
> > transformers have shunts? I know the winding over winding method
> > prevents
> > the use of them, but I'm sure shunts could save more than one small
> > transformer which was accidentally shorted/wired wrong/etc.
> >
> > ---Eric
>
>