Re: MOT current draw question

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

Original poster: "Marry Krutsch by way of Terry Fritz <twftesla-at-qwest-dot-net>" <u236-at-earthlink-dot-net>


Hi again.

	I'm sorry, I wasn't clear as to what I was measuring.  I did my tests
with individual transformers, one at a time, with the outputs shorted. 
One of my MOTs pulled 40 amps, according to the current transformer. 
The transformer is not damaged, and can run on a 15 amp breaker for
quite a while before the breaker trips.  I'm just not sure why my meter
says it's pulling 40 amps.  If that was true, my breaker should trip
*FAST*, shouldn't it?  I also had a voltmeter hooked up so I could do
true wattage measurments.  According to my math, at 39 amps and 95 volts
one MOT was pulling almost 4000 watts.  This can't be right, so can
somebody tell me what I'm doing wrong?

Thanks again,
Winston K.



Tesla list wrote:
> 
> Original poster: "Marry Krutsch by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <u236-at-earthlink-dot-net>
> 
> Hi all.
> 
>         I just got a new current xfmr, and used it to measure the current
draw
> on all my HV xfmrs.  My copier trannies measured acuratly at 8.4 amps,
> but my MOTs were a different story.  According to the current xfmr and
> Fluke meter they pull between 20 and 40 amps!  That can't be right,
> since I did the test on a 15 amp breaker which is supposed to trip at
> 17.5 amps.  What is happening?  How can I get an accurate measurment?
> 
> Thanks,
> 
> Winston K.