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Re: Potential Transformer - What is it
- To: tesla@xxxxxxxxxx
- Subject: Re: Potential Transformer - What is it
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Thu, 29 Sep 2005 01:43:22 -0600
- Delivered-to: testla@pupman.com
- Delivered-to: tesla@pupman.com
- Old-return-path: <vardin@twfpowerelectronics.com>
- Resent-date: Thu, 29 Sep 2005 01:42:46 -0600 (MDT)
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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