Hi Jim,
Thanks for the info. It is definitely not PCB; stated on the label as PCB
free. It is a clear liquid. It does burn. I have no issues filling the
capacitor under vacuum as a research scientist I have access to a complete
vacuum set-up. I will use the high voltage transformer oil that I have as I
know the physical characteristics of it. Hopefully the end result will be
close to its original capacitance. I will be running it at 11kV, so if it
is fine up to 33kV I will be happy.
Cheers
Paul
On Mon, Apr 1, 2019 at 1:33 PM jimlux <jimlux@xxxxxxxxxxxxx> wrote:
> On 3/28/19 12:06 PM, Paul McGlen wrote:
> > Hi All,
> > I recently acquired some Atomic Research Pulse Capacitors. They are 50kV
> > and 100nF, however, one of them was damaged and the oil has leaked out,
> so
> > I need to replace this. Does anyone know what this oil is and where I can
> > get it. If not can I replace it with high voltage transformer oil?
> >
>
> Unfortunately, you need to figure out what kind of oil it is. It could
> be any of the following likely candidates:
> 1) mineral oil (transformer oil)
> 2) Castor oil (used in Maxwell energy storage caps, it has higher
> epsilon than transformer oril)
> 3) some Askarel (PCB)
>
> it could also be something else - lots of dielectrics have been used
> over the years. The first two will burn, the third won't.
>
> The other challenge facing you is that filling the cap with oil is
> usually done with a vacuum pump to make sure there's no (microscopic)
> air bubbles in the oil, and as well, to insure that there's no water
> dissolved in the oil. Both of these lead to radically reduced dielectric
> breakdown voltage.
>
>
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