RE: question

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Loudner, Godfrey by way of Terry Fritz <twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>

Hi David

My mistake that I thought you were writing about a primary. You certainly
have a potential transformer, not a neon sign transformer. A potential
transformer is not current limited, but a NST is current limited. A
potential transformer is used to monitor the voltage level of a transmission
line. High voltage is reduced to low voltage for connection with a volt
meter. The 50kV peak could mean that the insulation can withstand a
momentary transient of 50kV. Seems a little odd, usually the impulse level
is 150kV.

Godfery Loudner
> -----Original Message-----
> From:	Tesla list [SMTP:tesla-at-pupman-dot-com]
> Sent:	Thursday, January 31, 2002 8:18 AM
> To:	tesla-at-pupman-dot-com
> Subject:	RE: question
> 
> Original poster: "David Thomson by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <dave-at-volantis-dot-org>
> 
> Hi Godfrey,
> 
> >In your original mailing, you wrote like you were talking about the
> secondary. But a secondary is not flat,
> 
> Mine is.  I wound a 27" diameter flat spiral secondary out of 21 gage
> wire.
> I'm doing several experiments with flat spiral secondaries.  You can see
> some of my work with smaller flat spirals wound with three parallel wires
> at
> my web site www.tesla-coil-builder-dot-com.
> 
> >What you call a potential transformer just might be a high voltage
> testing
> transformer.
> 
> I'm learning a bit more about this transformer today.  I may have been
> wrong
> in stating it was DC output.  The transformer schematic on the cover shows
> a
> positive and negative terminal with arrows supposedly indicating the
> direction of current.  But this may simply mean that one terminal is
> intended to be on the ground side and the output may be AC after all.
> It's
> an older transformer made by Westinghouse and I have much to learn about
> it.
> One person has suggested to me that it is actually an old style neon sign
> transformer.  It has a winding ratio of 120 to 1 and there is nothing
> indicating there is a rectifier inside.
> 
> If this is correct, then I have an old 14.4KV neon sign transformer rated
> for 50KV peak.  The label clearly identifies this transformer as a
> Potential
> Transformer.  Perhaps the two are synonymous?  Are there any experts on
> this
> list who can clarify this terminology?
> 
> David Thomson
> dave-at-volantis-dot-org <mailto:dave-at-volantis-dot-org>
> 
> 
>