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Re: Results of Paper & Poly & Oil
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To: tesla@pupman.com
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Subject: Re: Results of Paper & Poly & Oil
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From: Tesla List <mod1@pupman.com>
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Date: Wed, 1 Oct 1997 10:15:28 -0600 (MDT)
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Approved: mod1@poodle.pupman.com
---------- Forwarded message ----------
Date: Tue, 30 Sep 1997 19:57:48 +1000
From: Peter Electric <elekessy@macquarie.matra.com.au>
To: Tesla List <tesla@pupman.com>
Subject: Re: Results of Paper & Poly & Oil
Tesla List wrote:
> ---------- Forwarded message ----------
> Date: Mon, 29 Sep 1997 14:22:04 -0400
> From: Thomas McGahee <tom_mcgahee@sigmais.com>
> To: Tesla List <tesla@pupman.com>
> Subject: Re: Results of Paper & Poly & Oil
>
> Please note that the failure mechanism here can take place over an
> extended period of time. I would be interested in knowing if anyone
> else who has disassembled their HV caps has noticed this increased
> tendency to have corona along the "ends" as opposed to the sides.
>
> Hope this helps.
> Fr. Tom McGahee
Fr Tom,
My second cap failed at one end. I had allowed a 1" (not nearly enough I
now realise) border all round the plates and it appears to have tracked
around the poly at the end and then blown a hole through. It had 80 mil
thickness poly and I was running it with 15 Kv. The ends are even more
of a problem when you roll the cap as the poly layers tend to slide
along at the ends, further reducing the overlap.
Cheers,
Peter E.