Re: MMC cap bank

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

Original poster: "Finn Hammer by way of Terry Fritz <teslalist-at-qwest-dot-net>" <f-h-at-c.dk>

Mr. Resonance,

When the MMC Cap "thing" started a couple of years ago, nobody (not even
the manufacturers) knew enough about their caps to have a clue as to how
they could be rated to Tesla Coiling stresses. This problem was resolved
in
a collective effort right here on the list, with the majority of work
done by the moderator himself.
It was experimentally proven, that the producers voltage rating of the
caps was
very conservative, and that their DC rating could be used as the AC
rating
in Tesla coil service.
In general, the caps are forgiving to overvoltage, however quite
sensitive to overcurrent.

If you have done research on the subject, which disproves this
conclusion, it would be great if you would like to share it with the
list.

Cheers, Finn Hammer


Tesla list skriver:
 >
 > Original poster: "Dr. Resonance by way of Terry Fritz 
<teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>
 >
 > The manufacturer has spec'd the rating at 900 VAC.  He's running the caps at
 > 14.4 kV (mfgr rating is only 9 kV AC).  It's not rocket science.  He's
 > exceeding the manufacturers ratings severely.
 >
 > DC ratings have to be completely ignored because RF corona will occur at the
 > caps plate edges.  They will fail --- it's only a question of when failure
 > will occur.
 >
 > Dr. Resonance
 >
 >  >
 >  > I'm not sure I agree with this dismal assessment.