Re: Capacitor check (fwd)

---------- Forwarded message ----------
Date: Wed, 29 Apr 1998 11:08:09 MYT
From: Sulaiman Abdullah <sulabd-at-hotmail-dot-com>
To: tesla-at-pupman-dot-com
Subject: Re: Capacitor check (fwd)

Thank you, this is not the answer I wanted to hear, but it's an
answer I have to accept! ;-(
I've seen published (can't remember where) figures of 600v and 700v
per mm for tracking in air which is close to your more conservative/
practical figures.
Thanks for your time and effort. Bye ... Sulaiman

>From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
>To: Tesla List <tesla-at-pupman-dot-com>
>Subject: Re: Capacitor check (fwd)
>Hi Sulaiman,
>I just did a quick check with a piece of acrylic and 12kV in air. The 
>atmosphere is rather damp here but I noted corona tracking at over an 
>inch and actual sparks about 2/3".  I would say no more than 18kV or 
>so before corona would be a significant problem for 2" in air. In 
>oil, 25kV is a guestimate. Something to be measured and a table made 
>up for sure. The real problem is a lack of radius of curvature for 
>the plate edges. Corona starts at rather low voltages and will deal 
>to the plastic long before sparks do.

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