[TCML] Brand new 34.5kV 10kVA pig for $300 in PA
drieben at comcast.net
Sat May 10 12:49:59 MDT 2008
> If you look at the core and coil weights, it's pretty
> clear that much of the 700 lbs is in the oil volume.
> This, I'm assuming, is because a 34.5kV pig requires a
> lot more clearance between things inside the can.
My 150 kVp, .6 amp x-ray tranformer that I drive that
big Jacob's ladder with only weighs in the est. 500 to 600
lbs. range (my scales only go to 350 lbs.). I noticed that
just the dry core/coil assembly of the said pig weighs
299 lbs. according to the nomenclature tag. That's
still a bit more than the average 250 to 275 lbs. for
an average 10 kVA - core/coil assembly, tank, oil and all!
> My local utility, who has sold me pigs in the past,
> runs a rather odd 14760/25565Y system. On one trip, I
> saw a brand new 27kV delta pig (double-bushing, and
> presumably with taps for 25565) sitting there, and
> recalled it being much larger than expected for the
> kVA's. Unfortunately, they didn't have anything used
> at that voltage, or I'd have been real tempted!
My local utility uses 2 primary line voltages - 7200/12470
and 13200/23000 volts. It depends on what part of town
that you're in as to what the primary line voltage will be
at your local pole pig ;^) I wish I could get pigs that easily
from my local utility company. They have hteir own trans-
former repair shop, so by the time they're ready to retire a
pole pig, it's pretty well shot.
> I'm not sure about running a TC at 34.5kV. Not a
> small one, anyway! I'll probably be looking for
> something else to do with it.
Scot (aka bunnykiller) runs his coil on 2 seriesed 14.4
kV pigs, although he states that live component standoff
starts becoming quite dicy at 30 kV. On the upside, you
can cut the primary C by a factor of 4 if you double the
voltage and keep the same joules/bang energy. It would
probably make a nice JL, though ;^))
> Nice JL!!
> I recently ditched a pig as well, but now I'm going
> through withdrawals :-) My large PT collection just
> wasn't enough to sustain me, I guess!
> Aaron, N7OE
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