Re: [TCML] Pole transformer

[gary350@xxxxxxxxxxxxx]

You can put a low voltage IN then use your VOM to get what comes OUT.  6 or 12 VAC in would be a good start you can not hurt the transformer with such a low voltage.    

A 12 volt car battery charger output is pulsing DC your VOM will show output of about 6 volts AC. 

If your HV transformer steps up 220 to 12k ratio = 54.5 so 6 volts in will give you about 327 VAC out.  You should be about to figure out wiring with a few minutes of experementing.




-----Original Message-----
>From: David Rieben <drieben@xxxxxxxxxxx>
>Sent: Feb 25, 2011 8:36 AM
>To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
>Subject: Re: [TCML] Pole transformer
>
>Hi Joe,
>
>A typical pole transformer normally has 4 LV copper straps - one for
>each of the "hot" 120 volt-to-ground taps (this would be the 2 outer LV
>bushings on the tank's exterior), and 2 that connect to the center tap
>ground (both connected to the middle LV bushing on the tank's exterior).
>This allows the LV windings to be either seriesed (for a 240 volt output-
>the standard arrangement) or paralleled for a 120 volt output. If the 2
>ground straps are not connected to each other, as they would
>both be connected to the center LV bushing of the external tank,
>then there would be no continuity between the outer "hot" straps.
>Assuming that the 2 smaller straps are the terminations for the
>LV center tap ground and that the larger straps are the terminations
>for each of the (2) 120 volt "hot" outputs, this would explain your
>continuity findings. Try shorting the 2 smaller straps together and
>then check the 2 larger straps for continuity. If this checks out
>you should permenantly short them together before installing them
>into your enclosure.
>
>Also, the 2 smaller wires on the opposite side of the transformer are
>most likely the HV leads.
>
>David Rieben
>
>
>
>
>----- Original Message ----- 
>From: "Joe Korick" <joekorick@xxxxxxxxxxx>
>To: <tesla@xxxxxxxxxx>
>Sent: Thursday, February 24, 2011 7:16 PM
>Subject: [TCML] Pole transformer
>
>
>>I recently acquired a 10KVA pole transformer that has been removed from its
>> case.
>> My plans are to build a suitable enclosure and fill it with oil to immerse
>> the transformer.
>> My question has to do with the wiring of the transformer.
>> It has 6 connection points.
>> 4  copper straps, 2 large and 2 smaller on one side of the transformer.
>> 2  smaller wire on the opposite side.
>> Measuring the resistance, I have continuity from 1 large strap to one of 
>> the
>> smaller straps
>> Same with the opposite set of straps. No continuity from the large straps 
>> to
>> each other.
>> The smaller wires on the opposite side I assume are the high voltage
>> windings and I measure resistance across them.
>> This is a 220 v transformer with 2 high voltage outputs 12 KV.
>> Can anyone explain the low side wiring to me with the copper straps
>>
>> Joe
>>
>> _______________________________________________
>> Tesla mailing list
>> Tesla@xxxxxxxxxx
>> http://www.pupman.com/mailman/listinfo/tesla
>> 
>
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