RE: Odd wire on a 15/120

["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 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!
> 
>