Re: "aquarium gravel" in pole pig? :\

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

Original poster: robert & june heidlebaugh <rheidlebaugh-at-desertgate-dot-com> 

I havent seen it used in pole pigs, but in other transformers it is pure
silica ,alumina, or beryla used to conduct heat with out reducing voltage
rating of the oil. Glass beads are used in high voltage radar transformers
in aircraft to reduce size and weight.
    Robert    H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Tue, 10 Feb 2004 06:02:33 -0700
 > To: tesla-at-pupman-dot-com
 > Subject: "aquarium gravel" in pole pig? :\
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Tue, 10 Feb 2004 06:18:59 -0700
 >
 > Original poster: "J. Aaron Holmes" <jaholmes-at-silicon-arcana-dot-com>
 >
 > Got a couple new [to me] pole pigs the other day.
 > 15kVA -at- 14.4kV.  One's a Westinghouse, the other an
 > RTE.  Both are presently empty of oil.  I popped the
 > lid on the RTE today, and I see what looks like white
 > aquarium gravel in the bottom of the can and some on
 > the top of the transformer (I know that's not actually
 > what it is, of course).  Anybody have any idea what it
 > is?  Both units were certified working by the utility
 > I purchased them from, and I've called my contact
 > there to inquire but haven't heard back yet.  Looks
 > like it would be a real pain to pull the transformer
 > out and dust it off...thoughts?  Other than that, no
 > apparent problems.  Statically tests ok, but I'm not
 > throwing any voltage at it until I've added oil, of
 > course.
 >
 > Regards,
 > Aaron
 >
 >