Re: [TCML] pole pig ballasting

[David Dean <deano@xxxxxxxxxxxxxxxx>]

On Thursday 17 July 2008 01:36:57 pm garry neeley wrote:
> I hope it isn't 7200v.  I haven't tested it yet.  The nameplate says
> primary volts 12470, secondary 277/480y.  So what is it guys 7200 or 12470?

Put 120V across the HV winding. Measure the low voltage winding with a 
multimeter. Divide the high voltage (120V) by the low voltage to determine 
the turns ratio. Approximately 26 to 1 for 7200 to 277. 45 to 1 for 12470 to 
277. 
12470 is a Delta voltage, used for three phase transformers. 

later
deano
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