Re: NST and GFI ?

To: tesla-at-pupman-dot-com
Subject: Re: NST and GFI ?
From: Lightingcontrols-at-worldnet.att-dot-net (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Wed, 16 Feb 2000 19:55:49 -0700
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

GFCI can be "trippy" in the right(or wrong) 
circumstances. I know from experience they hate dimmers 
with large inductors. Long cable runs are also a problem. 
I think the problems with TC's are similar. The 
explanations given have been correct and even though 
there seems no imbalence the breaker sees it different. 
The qoute below is from Roscoe Entertainment technology.
Seems that proper filters would help alot.

[Ground Fault Document.doc:7/15/96]

Special Problems of Ground Fault Circuit Interrupters

A run of AC conductors will generate “capacitive 
coupling” which will
appear to the GFCI as an imbalance and, if the run is 
long enough, “trip”
the device. This problem is complicated by the harmonic 
currents
generated in a “phase controlled”(TC FEEDBACK?) circuit. 
The combination of harmonic
currents and capacitive coupling will confuse the GFCI 
with relatively short
conductor runs.
> Original Poster: "Jim Lux" <jimlux-at-jpl.nasa.gov> 
> 
> Almost all GFI's are electronic. Whether they are confused by RF is another
> story.  They are probably fairly immune to RF (given how they work
> internally).
> 
> ----------
> > From: Tesla List <tesla-at-pupman-dot-com>
> > To: tesla-at-pupman-dot-com
> > Subject: Re: NST and GFI ?
> > Date: Tuesday, February 15, 2000 6:59 PM
> >
> > 
> > I think that's a different issue - using a  GFI outlet shouldn't be a
> > problem unless the GFI is electronic and confused by RF. You shouldn't
> > have a current imbalance on the mains input (unless you have a lot of
> > mains filters)
> > I would think a GFI neon would sense current imbalance on the HV
> > _output_, and would probably be very confused by a TC load. 
> > 
> > 
> 
>