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RE: PCB test kits....5KW transformers



Original poster: gary350@xxxxxxxxxxxxx


I went to the scrap yard today. The 3 transformers are bolted to some type of heavy steel beam mounting fixture device designed to bolt to a power line pole. The scrap yard refuses to sell only the transformers. They want me to buy the entire thing including the steel mounting device. It weighs in at 1247 lbs. At 50 cents a lbs that comes to $685.85 with sales tax. If the metal fixture is removed, guessing weighs aprox 1000 lbs, resold for 4 cents a lbs. then $685 minus $40 = $645.85. I personally would not pay this price. If I could buy the transformers without that (ship anchor) the price would be closer to reasonable.

I wanted to mention the transformers looks like gray plastic with white insulators on top. They ohm out fine.

There is also a dumpster full of HV insulators. These things are hugh about 6 ft long probably 10" diameter with a bunch of metal stuff bolted to them. I bet one of these insulator weighs 200 lbs or more. Interesting junk but I have no use for it.

Gary





-----Original Message-----
>From: Tesla list <tesla@xxxxxxxxxx>
>Sent: Jul 14, 2006 4:46 PM
>To: tesla@xxxxxxxxxx
>Subject: 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!
>
>CHeers!
>
>Jack KIng
>
>holler at me if you need a suitable ballast too :) 801-604-5136
>
>
>>From: "Tesla list" <tesla@xxxxxxxxxx>
>>To: 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???
>>
>>Gary
>>
>>
>>
>>
>>
>>-----Original Message-----
>> >From: Tesla list <tesla@xxxxxxxxxx>
>> >Sent: Jul 12, 2006 7:48 PM
>> >To: tesla@xxxxxxxxxx
>> >Subject: Re: PCB test kits
>> >
>> >Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>
>> >
>> >Dan, all,
>> >
>> >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.
>> >
>> >David Rieben
>> >
>> >----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
>> >To: <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.
>> >>
>> >>Dan
>> >>
>> >>
>> >>
>> >> > 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
>> >> > >
>> >> > >.
>> >> > >
>> >> > >
>> >> >
>> >>
>> >
>> >
>> >
>> >
>>
>
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