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RE: Potential Transformer - What is it
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- Subject: RE: Potential Transformer - What is it
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- Date: Thu, 29 Sep 2005 15:47:32 -0600
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Original poster: "Rich" <rdjmgmt@xxxxxxxxxx>
Here is a question from a dummy, me. I have a transformer that is
13kv@150ma, the original use was from a laser power supply. I assume
that the 1.95 KVA rating on the tag is CCS. I plan to run it on an
autotransformer so I can get about 15KV out max. I was also thinking
about ballasting it for about 170ma max due to interment service with a
My question is what is the correct "name" for this type of transformer
so when I ask questions on the list I will use the proper terminology?
I have called it in the past a potential to differentiate from a current
Potential Transformer - What is it
Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>
It's used to run meters. The 14.4 kV is stepped in an exact ratio to
indicate 120 VAC on a meter. The meter is calibrated in kV so the
power company can check the line potential at a glance.
>Hi, kind of a dumb question, but I'm sure there's others wondering this
>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...?
>In a message dated 9/28/05 4:00:35 PM Eastern Daylight Time,
>Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>
>If you haven't wound the sec yet, go to 24 AWG 180 or 200 degree wire
>around 1,400 turns with aspect ratio of 4.5:1.
>I've run these PTs at 4 kVA keeping run time to 45 sec or less.
> >I was lucky enough to procure a Westinghouse PT-15 from Dr. R
> >(Thanks !) at the Cheesehead teslathon. From what I could gather
> >it's a 1750 VA, 120v to 14.4 KV unit. First I was wondering how far
> >I can push this unit? I was hoping to get up to 4 KVA on a 6" X
> >32" sec. with #20 wire. On another note I was wondering how to go
> >about conditioning the output? RF filtering etc. Is a modified terry
> >filter what I need? As always thanks in advance.