Re: Odd wire on a 15/120

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

Original poster: "Metlicka Marc by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mystuffs-at-orwell-dot-net>

i have a 12\30 nst that has this wire?
i thought it was for Pfc., silly me.
remote voltage or maybe diagnostic testing could be an option, check the
20v and if it is low then it's going bad, maybe? 
i never thought of it that way?
marc m.

Tesla list wrote:
> 
> Original poster: "Loudner, Godfrey by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>
> 
> Hi Jonathan
> 
> The extra lead could be for indirect sensing of voltage or current levels.
> X-ray transformers have such sensors inside their tanks.
> 
> Godfrey Loudner
> 
> > -----Original Message-----
> > From: Tesla list [SMTP:tesla-at-pupman-dot-com]
> > Sent: Friday, July 20, 2001 8:45 PM
> > To:   tesla-at-pupman-dot-com
> > Subject:      Odd wire on a 15/120
> >
> > Original poster: "jpeakall by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> > <jpeakall-at-mcn-dot-org>
> >
> > Howdy all,
> >
> > I got a 15/120 Franceformer the other day in some kind of lab equipment
> > (along with 3 variacs, one of them a 220v/100amp and tons of diodes,
> > relays
> > and so on for $100!!). It has a wire sticking out from the side which has
> > about 20v on it when the NST is activated. Is this a custom installation,
> > or
> > is there some reason for this? There is a printed (not by manufacturer)
> > little tag on it that says "ground mid point lead". Any ideas?
> >
> > Thanks,
> >
> > Jonathan Peakall
> >
> > PS Terry, got the movs as you reccomended. Thanks!
> >
> >