Re: Potential Transformer - What is it

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Yurtle Turtle <yurtle_t@xxxxxxxxx>

Here's what a typical PT looks like:

http://www.hot-streamer.com/adam/garage/pt_14.4kV_1.5kVA_1.jpg

http://www.hot-streamer.com/adam/garage/pt_14.4kV_1.5kVA_2.jpg

While it behaves like one, it doesn't look like a
"mini-pig".

Adam

--- Tesla list <tesla@xxxxxxxxxx> wrote:

> Original poster: dave pierson <davep@xxxxxxxx>
>
>
> >What exactly is a potential transformer? I thought
> I remembered it
> >being like a mini-pig,
>
>     Good Image.
>
> >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...?
>
>     The name, and original use, derives from using a
> 'small'
> transformer to 'sample'
>     the 'potential' from a line, for instrumentaion
> purposes:
>       driving voltmeters
>        driving 'protective relaying'
>           etc
>
>     on the power distribution system.  They drop
> 'whatever' down to
> the voltage used on the
>     instrumentation, typically 120vish full scale.
>
>     best
>      dwp
>
>
>