Re: PDT (Pig) failure modes

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

Original poster: "Nicholas Field by way of Terry Fritz <twftesla-at-qwest-dot-net>" <nick.field-at-hvfx.co.uk>

Hi Dave, Mark, all,

There's a great photo from Finn Hammer that just says it all -

http://home5.inet.tele.dk/f-hammer/caparc.jpg

_______________
Nick Field, HVFX
www.hvfx.co.uk

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, September 20, 2002 11:05 PM
Subject: RE: PDT (Pig) failure modes


> Original poster: "Mark W. Stolz by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <mark_w_stolz-at-hotmail-dot-com>
>
> Dave,
>
> A primary strike is probably not going to hurt your pig.  Here's a shot of
a
> nice solid primary hit running ~12kVA.  The coil is a 12", the tank that
> night was around .187uF.
> http://users2.ev1-dot-net/~nmyreality/tesla/AJ010803/primary_strike.jpg
>
> And no safety gap at all.  This is just one of many strikes I've seen this
> coil take.
>
> Mark Stolz
> Houston, TX
>
>
> >Original poster: "Dave Hartwick by way of Terry Fritz
<twftesla-at-qwest-dot-net>"
> ><ddhartwick-at-earthlink-dot-net>
> >
> >David,
> >Yes, but what about the surviving the energy from a primary strike, for
> >example, which can be huge voltage wise? It is not hard to imagine the
the
> >insulation used in the core not surviving such voltages. Minor charring
may
> >be enough to start the failure ball rolling.
> >
> >My safety gap was not grounded and the system took several primary
> >strikes---juicy ones at about 4 kVA from an 8" secondary. Dr. Resonance
> >seems to think this would be enough.
> >
> >BTW, physically, my PDT does not appear to be very old at all. It looks
> >just
> >like the ones generally in use now, festooning the telephone poles. But
who
> >knows the actuall condition of the insulating material inside the core.
The
> >dialectric properties of the paper, for example, could be shot, and still
> >physically appear to be normal.
> >Dave
> >
> >
> >
> >Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> ><Tesla729-at-cs-dot-com>
> >
> >Ken, all,
> >
> >I realize ANYTHING manmade will eventually wear out and ultimately
> >fail, but it seems to me that Dave's pig failed LONG before it should
> >have, due to aging! Pigs (PDTs-if you're politically correct:-) are de-
> >signed for the most rigorous electrical and environmental operation
> >and are designed to operate in these harsh environments for 20 to
> >30 years without a hitch. Occasionally there will be a "lemon", but
> >the vast majority of them are like a Timex watch - they'll take a lick-
> >in' and keep on tickin'. Like Terry says, our "coiling" doesn't really
> >even come close to challenging the BIL voltage design envelope of
> >these beast :-) They're designed to withstand direct lightning hits
> >(with the help of  lightning surge arresters) on their primary line
> >inputs and the kickbacks of Tesla coiling are quite puny in energy
> >compared to to lightning bolt-to-line hits ;-) BTW, lightning surge
> >arresters make good substitutes for safety gaps.
> >
> >Coiling in Memphis,
> >David Rieben
>
>
>
>
>