RE: Help, to much power draw with MMC

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

Original poster: "Lau, Gary by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Gary.Lau-at-compaq-dot-com>

You didn't say anything about a spark gap.  Normally, the sound generated
by the gap would make it very difficult to hear a humming NST and Variac.
But, if you don't have a spark gap for this testing (just the NST across
the cap), this is an extremely *bad* thing for your cap and NST, and will
result in high current draw, with painful groans from the NST and Variac as
you describe as the core saturates.  It's a bit like flooring the gas in
neutral.  All that energy has to go somewhere.  The cap & NST will be near
60Hz resonance and the voltage will climb to a very damaging level.

Regards, Gary Lau

Original poster: "Shaun Epp by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<scepp-at-mts-dot-net>

Help guys,

I just finished my MMC, readjusting my safety gaps, and other projects.
When I connect the cap bank (0.0215 uF) to the NST and filter set up the NST
starts to Hum loudley and so does the the variac, it vibrates, I has a meter
on it and past  50Vac and 5amps the loud humming and vibrating begins.  I
did this test to make sure the MMC withstands the voltage (  it better- two
rows of 14 geek capacitors)  I measured the capacitors - sure enough 0.0215
uF and 70Mohms resistance just like it should be.

My variac, which is from a furnace control it only rated at 5 amp, so I
bypassed the resetable fuse 8 - )   and I've pulled i'm sure 10 or so amps
off of it.  Could this be a problems, generating harmonics ???  The other
question is that I'm using a High power factor NST.  Its made by Allanson
12Kv  60mA   model 455B if that means anything.  Would the capacitive
reactance of the MMC bank and that of the PFC built in  be causing the
current to jump up like this and making my NST HUM??

I'm not sure what's wrong, any Ideas!!

Shaun Epp