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Re: MOTs in series
They are designed for 2 kV insulation levels. You can run 2 in
series, but more than this they have to be immersed in oil or they will
arc over to the core as the series voltage adds, ie, 2 kV x 4 = 4
kV add another 2 kV in series to get to 6 kV but it will
flash over in air.
Yes, in my dual MOT design coil (7.5 ft output spark) we run each MOT at
up to 18 Amps off separate 120 VAC circuits. By keeping each
circuit under 20 Amps you avoid tripping breakers.
The coil is presently a "work in progress". Hope to be
finished with it in Feb.
- ----- Original Message -----
- From: Tesla list
- To: tesla@xxxxxxxxxx
- Sent: Tuesday, January 02, 2007 8:25 PM
- Subject: MOTs in series
- This is probably a stupid question, but I was wondering what exactly
the problem with having several MOTs in series is. The web sites
that I have found that discuss this topic all say that the problem is
that the insulation on the secondary isn't sufficient to prevent arcing
to the core, but what if the core is at high voltage as well? Like,
if the secondaries were strung together, with the hv output of one
secondary attached to the core of the next MOT? I think that each
MOT would not have a potential difference from the secondary to the core
of more than the original rating for a single MOT, and since the
primaries are electrically isolated from the high voltage across the
secondaries, arcing to them shouldn't be a problem, unless maybe
something on the secondary was grounded. Is this correct?
- Also, I was wondering if you could parallel the primaries instead of
connecting them in series, so that different MOTs could be connected to
different outlets/circuits/breakers (assuming they were all
- Thanks a lot,