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Re: PCB test kits....5KW
Original poster: "Mike" <mike.marcum@xxxxxxxxxxxx>
Being dry you probably can't push it 5x over rating like oiled pigs
for very long. Personally I wonder what their filled with if not oil.
NST tar? That's scarey. Hope it's just air with coils and varnish
impregnated paper. I'd guess you could take 2 of the 3 kVA's and
series both primaries and secondaries for 220v in and 20kV out with
the HV middle grounded to the tank/core.
----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
Sent: Thursday, July 13, 2006 9:03 PM
Subject: PCB test kits....5KW
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,
>>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
>> > >
>> > >.
>> > >
>> > >