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Re: [TCML] laminations
Another good trick is to use two separate primary ballasts for each MOT.
Plug each into a separate 20 Amp, 120 vac circuit. You can run approx 16
Amps on each MOT, so safely pulling a total of 32 Amps for 3.8 kVA. The MOT
secs are connected in series for a nice 4 kV at 3.8 kVA. This trick makes a
nice dual MOT coil very portable as they can be operated off a pair of
separate 120 vac circuits --- great for doing school demos, etc.
At this power level I use a 12 inch dia. sec for great 4-5 ft plus sparks
with a hyperbaric sparkgap.
If you contact me off-list, I have some very nice small, inexpensive cores
that work great for MOT ballasting.
On Wed, Mar 26, 2008 at 3:50 PM, <Mddeming@xxxxxxx> wrote:
> In a message dated 3/26/08 2:24:21 P.M. Eastern Standard Time,
> neal@xxxxxxxxxxxxxxxx writes:
> Thank you everyone for your input on laminations. From a transformer
> standpoint, it was just a matter of curiosity for me, but from a practical
> standpoint, I am more curious about its applications in ballasting. For
> moment I've been experimenting with ballasting mots with mots, but down
> road I hope to get a pole pig eventually. But before I do, I want to have
> the necessary parts in place to be able to control the pig. Getting back
> mot's, though, what kind of amperage can one expect to be able to push
> through a mot, safely, before things go up in smoke?
> You might try limiting to not over 2X oven rating. 800 W= 1600/120 <13
> 1 KW = 2000/120 < 16 A, 2 KW = 4000/120 < 32 A etc.
> Oil immersion allows more.
> Matt D.
> (Many folks go with 80-90% of what burned up their last one) ;^)))
> I think before I go too much bigger I'll have to run a new line to my
> Right now it's fed through a 15 amp breaker, though I can push it for a
> couple/few seconds at 20ish amps before tripping.
> Thanks again for your help and info,
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