RE: Pole Pig Construction

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

Original poster: "Dave Hartwick by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ddhartwick-at-earthlink-dot-net>

What is the purpose of grounding the center xfmr's?? Safety? I've seen this
recommended in more than one MOT PSU schematic.

Maybe I'm missing something obvious.

Dave H



you have to find a way to isolate the cores and primary windings from each
other if you connect them in series to acheive your expected output voltage.
Say you wnt around 15kV from 2kV transformers. That's a string of 7. If you
ground the center, you still have 7kV across the primary windings to the
output on the "outer" two transfomers. It seems some insulate them with oil,
which is really messy and does not sounds too portable.

KEN

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, August 17, 2002 11:42 AM
Subject: Re: Pole Pig Construction


> Original poster: "Daniel McCauley by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com>
>
>
> Why not look into using MOTs (microwave oven transformers).  They're dirt
> cheap, readily available (even if purchased new), and would be MUCH easier
> than actually winding and building your own pig.  Thats what i'm going to
> do.
> Dan
>
>
> > I've been after a pig well over a year now. it seems no one in the area
of
> > maryland is willing to cooperate with me unless i have $1000 to blow or
am
> > a business. i was searching around the web and came across 2 websites
> > (which i dont have the urls for) where people have made their own.
> >
> > I am quite interested in building my own if my search does not yeild
> > results int he new few days. however, this type of transformer design is
> > not all clear to me and the two wesites constructed the pigs
differently.
> >
> > would anyone care to help me figure out how to design a pig? perhaps
about
> > 5kva?
> >
> > -matt
> >
> >
> >