Re: transmission lines from transformer /was: First Light HELP

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: DRIEBEN@xxxxxxxxxxxxxxx 

Hi Dr,

I knew that you had spoken against this before but
this is the way that I ran my original pole pig dri-
ven coil system for several years and I never had a
failure of the pig. In my current setup, I also have
an 18 kV rated distribution arrester directly in pa-
rallel with the output bushings of the pole pig so
the voltage level at the output of the pig isn't going
to be able to significantly go above 18 kV or so with-
out getting shunted or shorted out until the voltage
drops back to under 18 kV. Basically, the distribution
arrester acts as my "safety gap". Also, the standard BIL
rating of the HV windings of a 14.4 kV pole pig is 110 kV
which means that these type of transformers are pretty
near "bullet proof" in Tesla service. "I'd" be much
more worried about any of the other components of the
system failing before I worried about the pig dying. ;^)
Although not unheard of, reported pole pig failure in Tesla
service is quite uncommon.

David Rieben

----- Original Message -----
From: Tesla list <tesla@xxxxxxxxxx>
Date: Wednesday, May 18, 2005 8:16 pm
Subject: Re: transmission lines from transformer /was: First Light HELP

> Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>
>
>
> Don't do this --- you could blow your pig with a cap at the other
> end!!!
> Dr. Resonance
>
> >
> >  > Original poster: Esondrmn@xxxxxxx
> >  >
> >  > Drew,
> >  >
> >  > Not sure about the HV cables hissing.  Do you have them
> laying on
> >  > the
> >  > cement?  What kind of wire are you using?  How close
> together are
> >  > they?  I
> >  > use RG213 with the outer jacket and ground sheath removed
> and the
> >  > cables
> >  > are sitting on 2 x 4s on the cement.
> >
> > Not sure that this is recomended but I use x-ray HV cables
> > with the grounding sheaths intact and gronded at the mains
> > ground at the pole transformer. They certainly don't hiss
> > in this setup although this may be a NO-NO from an RF kick
> > back stand-point?? I've heard that this type of setup also
> > causes a "Blumline effect" which causes voltage levels to
> > reach much higher than the output voltage of the transformer
> > itself, but I have not had any pole pig transformers to even
> > hiccup from running like this. One reason I do it this way
> > is to stop the hissing and to make it safer if the lines are
> > touched while energized. I know the electrical utility com-
> > panies must use this method on all of their underground power
> > lines. Any observation/comments from others on this matter
> > are welcome....
> >
> >
> > David Rieben
> >
> >
> >
>
>
>