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Re: PTs vs Pigs
Original poster: "David Sharpe by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>
Godfrey, Christopher B.
He found it in a wood crate / "tub" at the infamous Richmond VA
salvage yard... :^) Transformer is in VG shape except for what
appears to be a _very_ slow oil seepage stain on one side. Will
sand down to bare metal, back fill with epoxy (or JB Weld),
sand, prime and repaint body with epoxy paint. HV insulators
are 100% intact, no cracks, defects, or arc tracking evident.
BIL on this monster is serious (either 250 or 300kV, somewhere
in this range).
N2, diatomic dry nitrogen gas, to back fill unit to 1 atm. after
filling with transformer oil (under vacuum), to keep air
(and hopefully) corona out...
It is by far the largest PT I've ever personally seen, or had
the "pleasure... 8^P " of moving. Only negative is 120VAC
input.... Imagine if you had a twin and could run primaries
in series and secondaries in parallel... a cool 240VAC in;
46kV out at 14kVA _nameplate_ (more like 50kVA short
term bank capacity with oil filled units like this).
Dave Sharpe, TCBOR
Chesterfield, VA. USA
Tesla list wrote:
> Original poster: "Loudner, Godfrey by way of Terry Fritz
> Hi Christopher
> What is N2 and by what magic did Alex get such a transformer?
> Godfrey Loudner
> > -----Original Message-----
> > From: Tesla list [SMTP:tesla-at-pupman-dot-com]
> > Sent: Monday, May 27, 2002 9:02 PM
> > To: tesla-at-pupman-dot-com
> > Subject: Re: PTs vs Pigs
> > Alex T. has
> > one "monstrous" GE unit 46kV, 120V - 7.5kVA. It is a
> > horse, at 400lbs +... minus 10-15 gallons of transformer oil.
> > Going to completely restore and
> > repaint, pull vacuum with external heat (drive off any moisture),
> > refill with oil then top off with N2.
> > Regards
> > Dave Sharpe, TCBOR
> > Chesterfield, VA. USA