Re: Many dry caps in series?

• To: tesla-at-pupman-dot-com
• Subject: Re: Many dry caps in series?
• From: Gary Lau 19-Oct-1998 1446 <lau-at-hdecad.ENET.dec-dot-com> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Mon, 19 Oct 1998 17:27:31 -0600
• Approved: terryf-at-verinet-dot-com

>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 ?

I believe corona occurs as a result of the strength of the electric
field, in volts per inch, or whatever.  Across the dielectric, the field
is 1KV/.006" = 166V/mil.  From the top plate to ground, assuming a 2 inch
seperation, the field is much lower due to the greater distance.  20KV/2"
= 10V/mil.

Gary Lau
Waltham, MA USA

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