Re: Capacitor dielectric
Subject: Re: Capacitor dielectric
From: jim.fosse-at-bdt-dot-com (Jim Fosse)
Date: Tue, 09 Apr 1996 00:33:42 GMT
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>>From ed-at-alumni.caltech.edu Sat Apr 6 10:13 MST 1996
> Have you tried pumping the capacitors down and then
>pouring in the oil? Probably from a jug which is also connected
>to the capacitor and evacuated first. That is the general
>procedure for vacuum impregnating transformers, and seems to
>work well. Not sure about the water aspirator, though, because
>there will be water vapor in the system.
>[ This is the technique that I used and my cap is still working after 15kV
> -- Chip ]
It may actually work better than a real vacuum pump. I use an
industrial vacuum pump, when I open up the oil valve, the oil boils,
introducing more gas bubbles.
I don't have a way of regulating the vacuum yet. The lighter fractions
of the oil appear to boil off.