Re: MOT Current Measurement

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

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

if you're just making transformer parameter measurements (i.e. leakage
inductance), you can make the measurements at lower primary voltages (use a
resistor or variac to drop the voltage).  Or, you can short the low voltage
winding and put the 120 or 240 on the HV winding....


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, March 31, 2002 7:46 PM
Subject: MOT Current Measurement


> Original poster: "Matthew Smith by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <matt-at-kbc-dot-net.au>
>
> Hi All
>
> I wish to take current measurements of a microwave oven transformer
> (MOT).  I propose to short out the secondary with a a piece of wire
> around which I would place a clamp ammeter.  I would then put the clamp
> meter around one of the primary leads to measure input current.
>
> 1) Is this the correct procedure for taking transformer measurements?
> 2) How quick would I need to be taking measurements before the shorted
> secondary caused overheating?  (Assume a thirty degree Celcius ambient.)
>
> Cheers
>
> Matthew Smith
>
>
>