Re: Potential Transformer - What is it

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>

At 11:25 PM 9/28/2005, you wrote:
> Original poster: Kidd6488@xxxxxxx
> Hi, kind of a dumb question, but I'm sure there's others wondering this too...
>
> What exactly is a potential transformer? I thought I remembered it 
> being like a mini-pig, but I'm not sure... if its 120v to 14.4kV it 
> has to be some kind of step-down transformer  for small loads off 
> the standard 14.4kV  power lines...?

Precisely that...
Also used to measure the voltage of a MV line.  Most utility meters 
have movements designed for 115V..

In general the potential transformer will have more attention to good 
regulation (so that it actually gives an accurate reading on the meter).