Re: Many dry caps in series?

• To: tesla-at-pupman-dot-com
• Subject: Re: Many dry caps in series?
• From: Jim Lux <jimlux-at-jpl.nasa.gov> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Mon, 19 Oct 1998 17:27:54 -0600
• Approved: terryf-at-verinet-dot-com

Tesla List wrote:
> 
> Original Poster: David Huffman <huffman-at-fnal.gov>
> 
> Something I have wondered is if there will still be corona on the caps that
> are at the top of the voltage string. That is even though the individual
> voltages on the sections will be under 1KV, the voltage on some sections
> will be several KVs WRT ground or the surrounding air. Does someone know for
> sure ?
> Dave Huffman

You could reduce this effect by putting in "grading rings", i.e.
electrodes that establish the overall efield. Imagine a stack of toroids
at successively higher voltages. Anything between a pair of toroids will
only see a E field determined essentially by the voltage difference
between the toroids, with almost no concern for the outside world.


However, for the low voltages one sees in TC primary service, I wouldn't
think this is necessary. The breakdowns in dry caps occur within the
cap, determined entirely by the voltage on that cap. You won't get much
corona or flashover from the cap to ground.


-- 
Jim Lux                               Jet Propulsion Laboratory
ofc: 818/354-2075                     Mail Stop 161-213
lab: 818/354-2954                     4800 Oak Grove Drive
fax: 818/393-6875                     Pasadena CA 91109

• Prev: Re: Very low Fo Coils (was:not so scary idea)
• Next: Re: Efficiency
• Index(es):
  • Main
  • Thread