Re: oil dielectric

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

LN2 is a fairly good insulator (being a "pure" liquid) with breakdown
strengths in the MV/cm range.. It also has the nice property of greatly
reducing the resistance of the copper being immersed..

As to dielectric losses, you might be able to find some information in IEEE
Transactions on Dielectrics..

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, May 15, 2002 5:45 AM
Subject: Re: oil dielectric


> Original poster: "Mark Fergerson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <mfergerson1-at-cox-dot-net>
>
> Tesla list wrote:
> >
> > Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Xyme3-at-aol-dot-com>
> >
> > Air?
> >     Free, self healing, good dielectric strength.
> >     Oil scares me from being flammable, tho many people
> >     use it.  I Have my doubts water can be kept
> >     sufficiently pure.
> >
> >     best
> >     dwp
> >
> > I suspect liquid nitrogen would be best, and also impractical
>
>   I've had similar thoughts re: LN2 but can't seem to find
> any info on its electrical properties (dielectric constant,
> loss factor, characteristic spark length WRT air, etc.). Got
> references (preferably on the web) to share?
>
>   It's not all that expensive, and yes, handling it is
> something of an art, but "impractical" is a relative term in
> TC work.
>
> > Thanks for tthe advice.
> > Tesla used boiled out oils which might be less flammable. Air is however
of
> > variable conductivty especially in the presence of ozone. Maybe if it
were
> > somehow possible to exclude air entirely, the oil could not catch fire.
>
>   Actually, as I read his writings, he boiled it out because
> air trapped in the windings is a source of heating and
> arcing due to its dielectric properties, not a fire hazard.
>
>   Mark L. Fergerson
>
>
>