Re: poly pig

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

Original poster: "David Rieben" <drieben-at-midsouth.rr-dot-com> 

Hi Steve,

I suppose that you could go through all of these steps to make your pig
lighter and somewhat more compact but IMHO, it seems like an awful lot of
trouble to modify an already proven design. The heavy-duty oil-filled tank
is obviously the most bullet-proof design available since this is the design
that electrical utility companies rely on for 20+ years of reliable service
in all that mother nature can throw at them in the "great outdoors". Also, I
fear that the polymer wouldn't  maintain dielectric integrity as well
as the oil, for if a HV flashover did occur, it would be ruined because of
the resultant carbon tracking in the soild polymer. The oil would obviously
be more forgiving than the solid polymer in this situation. Just MHO....

David Rieben

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, July 06, 2004 5:47 PM
Subject: poly pig


 > Original poster: "steve" <steve_vance-at-cablelynx-dot-com>
 >
 > Has anyone ever tried to encase a pig transformer in a polymer? I was
 > thinking about draining the oil and replacing it with a solvent to clean
all
 > traces of the oil from the transformer. Next I could remove the
transformer
 > and make a sheet metal form that fits with about an inch clearance all
 > around it. Then I could place it in the empty can, fill the form with the
 > polymer, and use the can for a vacuum canister to thoroughly impregnate
the
 > windings. Let is set, remove the form, and I would be left with a lighter,
 > smaller, protected HV source. Anyone know of any reason this wouldn't
work?
 > What kind of polymer Should be used?
 >
 > Steve Vance
 >
 >