Alfred
Great write up! Your comments spurred
some thoughts in this "gray head".
Oil filled transformers will generate gas
In a flashover event as you observed.
Species of gases include actedelyene and
hydrogen, both explosive and both NOT
desired around energized equipment!
Some large station service (>100MVA)
have gas sensors to detect these precursors
to failure, usually dead gas space in these
power units are filled with dry N2.
On Thursday, April 10, 2014, alfred <alfred@xxxxxxxxx> wrote:
> Hello David, All,
>
> I know this topic has been beaten to death, but I just had a moment
> to find old and relevant files. Below is my failed design.
>
> I built an EDM oil (made for high voltage oil) quenched spark gap
> circa 2002. See links below for pictures and design. I connected a 10,000
> volt 60hz transformer across it to test it. The gaps were set too wide at
> first and I finally narrowed them until it started to spark thru the oil
> across the gaps. Upon sparking, it immediately created gas bubbles. This
> could have been vaporized EDM oil or broken down precursors, I really don't
> know. I think I remember carbon flecks in the oil afterwards too, but not
> for sure. It was instantly obvious that this was not a viable way to have
> a consistent, rigorous quench. In less than 10 minutes, I turned it off,
> never to run again.
>
> http://neongold.com/public/3/oilsparkgap002.pdf
>
> http://neongold.com/public/3/oilsparkgap003.pdf
>
> http://neongold.com/public/3/oilsparkgap 3D.pdf this is a 3D .pdf --
> click in the body to activate, you can rotate, turn levels on/off, zoom,
> etc.
>
>
>
> Alfred Erpel
>
>
>
> ----- Original message ----------------------------------------
> From: "David Boyle" <twoten@xxxxxxxxx <javascript:;>>
> To: tesla@xxxxxxxxxx <javascript:;>
> Received: 2014-04-08 9:32:19 PM
> Subject: [TCML] fluid quenched rotary spark gap
>
>
> >I'm planning to build a synchronous rotary spark gap with the terminals
> >inside a fluid tight plastic box and filled with dielectric oil. This
> >should cut down on the noise, allow me to use steel electrodes because
> >of the lower temperatures, and it should quench like a champ. Has
> anyone
> >had any experience building one of these?
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--
Dave Sharpe, TCBOR/HEAS
Chesterfield, VA USA
Sharpe's Axiom of Murphy's Law
"Physics trumps opinion!"
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