[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: PCB test kits....5KW transformers
Original poster: "Jack King" <ekklekktikk@xxxxxxxxxxx>
They are definately worth snagging - if the $ is right. Being dry
from the get go, no PCB worries, and they will save your aching back!
Depending on a few factors, you could configure "the twins" in a
series-series or series -paralelly config, so you could utilize 220
in and get 10,000 out @ double the current or 20,000 V out...Heck any
Neon shop would be happy for such a rig.
Also, even though they state 110 pri (or sec I guess) maybe they are
bi-filar wound, so you could recnfigure the lv side in
series...Lastly, the voltage drop you would realize from something
like a slide choke would place things down in the 160-170 v realm -
SO- seing that all utility stuff is way overbuilt and would have a
high BIL voltage, you could *likely* get away with overvolting the
transformer for the limited duty cycle runs you would (likely) be
using it for...
Grab em' if they are affordable - and I sincerely doubt the utility
would have any use for them anyway!
holler at me if you need a suitable ballast too :) 801-604-5136
From: "Tesla list" <tesla@xxxxxxxxxx>
Subject: PCB test kits....5KW
Date: Thu, 13 Jul 2006 19:03:34 -0600
Original poster: gary350@xxxxxxxxxxxxx
I talked to Bobby Stevens at the power company maintenance shop. He
says it is extremely rare to find a transformer these days with
PCBs. The last one they found was 5 years ago. They dump the PCB
oil into a burn tank with lots of other used oil and set it on fire.
There are 3 old power line transformers at the scrap yard that the
power company trashed. They are all DRY type transformers. The
tag on one transformer is marked 110 VAC secondary, 10,000. VAC
primary, single phase, 5 KW, the date is 1950. The insulators on
top are about 4" tall. The tag on the other transformer says the
same thing only difference is its 3KW.
The other transformer has NO tag but the physical size is identical
to the 3KW transformers. Bobby Stevens said they were cleaning up
and found them back in the corner of the building probably been
there for 50 years. He figures they are probably good other wise
they would not have been saved all these years. They can be bought
at the scrap yard but I did not ask, HOW MUCH. I figured they arn't
much good being 110 volts 45 amp. What do you all thing???
>From: Tesla list <tesla@xxxxxxxxxx>
>Sent: Jul 12, 2006 7:48 PM
>Subject: Re: PCB test kits
>Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>
>I would have to agree with you here. I'm sure a
>"basically" petroleum based fluid would burn quite
>nicely with a far greater concentration of PCB con-
>taminant than 50 PPM! 50 PPM PCB is the maximum
>EPA contamination level allowed and I'm sure 1/20,000th
>part PCB would not impede the combustible character-
>sitics of petroleum by any perceivable amount, nor would
>much higher concentrations of PCB, say 40X more PCB
>concentration, or 1/500th part. PCB itself is not combustible,
>but I don't think it's going to have a "halon" effect when mixed
>in small concentrations with petroleum based liquids, either.
>----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
>Sent: Wednesday, July 12, 2006 6:37 PM
>Subject: RE: PCB test kits
>>Original poster: <dhmccauley@xxxxxxxxxxxxxxxxxxxxxxxxxx>
>>The "burn test" is a very poor indicator of PCBs. Mixtures that contain
>>non-PCB oil mixed with PCBs still tend to burn. I have had about 4
>>transformers i've tested that were negative on the burn-test, but positive
>>on the chemical test.
>> > The "burn test" is usually a good indicator. Dip a piece of paper
>> > into the oil and try to light it.
>> > Dr. Resonance
>> > ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
>> > To: <tesla@xxxxxxxxxx>
>> > Sent: Wednesday, July 12, 2006 1:07 PM
>> > Subject: PCB test kits
>> > >Original poster: Gomez Addams <gomezaddams@xxxxxxxxx>
>> > >
>> > >A while back, someone posted a source for relatively
>> > >inexpensive PCB test kits. I've got a Korean War era
>> > >x-ray transformer that I'm deciding what to do with,
>> > >and whether it contains PCBs will impact my decision.
>> > >
>> > > - Bill "Gomez" Lemieux
>> > >
>> > >.
>> > >
>> > >
On the road to retirement? Check out MSN Life Events for advice on
how to get there! http://lifeevents.msn.com/category.aspx?cid=Retirement