[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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
 >
 >