Re: where to get dielectric oil? =

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

Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net> 

$5-6/gallon sounds like a reasonable price for DialaAX

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, August 20, 2004 6:42 AM
Subject: Re: where to get dielectric oil? =


 > Original poster: "David Rieben" <drieben-at-midsouth.rr-dot-com>
 >
 > Terry, all,
 >
 > I called the local authorized Shell Oil distributor today
 > and found that they did carry the Shell Diala oil, but
 > not the type M. They did carry one of the 2-letter
 > grades (can't remember which one off hand) but
 > it wasn't currently in stock in the local warehouse.
 > However, they did have some in stock at the ware-
 > house in Jackson, TN (about 80 miles). They could
 > bring it from their Jackson warehouse and have it ready
 > for pick up in  couple of days. Their price for it is
 > $5.28/gal, which puts a 5 gallon container at $26.40.
 > That seemed reasonable enough to me so I ordered
 > one 5 gallon container. BTW, this oil company is the
 > only local authorized Shell Oil distributor for the Mem-
 > phis and Jackson, TN area according to the Shell Oil
 > webpage, so shopping around locally didn't seem to
 > be an option for me.....
 >
 > David Rieben
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Thursday, August 19, 2004 3:40 PM
 > Subject: Re: where to get dielectric oil? =
 >
 >
 >  > Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>
 >  >
 >  > Hi David,
 >  >
 >  > Phenolic type "GPO3" is very tracking resistant.  It is a red to pink
 >  > polyester phenolic that is used in all kinds of HV electrical
 >  > stuff.  McMaster sells it somewhere but I can't find it at the
 >  > moment...  Polypropylene will burn up bad, but it is very resistant to
 >  > failing in the first place that may indeed fix the problem ;-))  G-10
is
 >  > nice for low voltage stuff but GPO3 is best of HV...
 >  >
 >  > Water at the bottom of a container of transformer oil is usually
 > considered
 >  > a disaster...  Oil can hold a lot of water, thus the vacuuming of
 >  > refrigeration systems and all to purge out all the water...  The thing
I
 >  > saw for a big substation transformer oil filling, heated the oil to
boil
 >  > off water under vacuum in a continuous loop recirculating system.
Quite
 > an
 >  > operation!!  It took days...  That transformer slide 3 feet on the rail
 > car
 >  > it was delivered on (200 tons!!) and came damaged.  They "thought" they
 > had
 >  > it all fixed...  It failed within a year and destroyed the substation
 >  > ($15,000,000!!!)...  But the mechanical damage was to blame, not the
 >  > oil.  They tested transformer oils all the time for breakdown as a
 > periodic
 >  > check to be sure water was not getting in...
 >  >
 >  > If you really care, I would get that nice new Shell oil and all...  I
 >  > really worry about used oils or "just any" oils for things that really
 >  > matter...  "Water" is the worst enemy.  I seem to remember a "descant"
 > that
 >  > works inside transformer oil too....  But just "clean and dry" will fix
 >  > 99.9% of problems...  I would consider sloshing around alcohol, like
the
 >  > gallon tins from the hardware store first to clean things if needed.
 > Then
 >  > heat the thing up for a day or so to drive out water.  "Any oils" may
not
 >  > have all the "bad oils" removed that could attack transformer shellacs
on
 >  > the wires and all too...  "Detergent" motor oils are designed to eat
 > though
 >  > shellacs which may not be a good thing in a tranny!!
 >  >
 >  > If you get oil from Shell, please tell us how it goes (cost??)...  They
 >  > seem very happy to sell it to anyone they can find ;-))
 >  >
 >  > Cheers,
 >  >
 >  >          Terry
 >  >
 >  >
 >
 >