Re: Am I courting disaster?

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

Original poster: "James" <mustang3-at-cox-dot-net> 

Hi Dave,
     That "visible transformer" is so cool. I've been lugging my pole xmfr
around for years(I use an engine crane) and I can feel your pain. I would
pull a wire off the core and tie to RF ground. I ground the can of my pole
xmfr to power line ground. This capacitor couples the HV winding to ground.
I have seen many strikes to primary and the feed cables(check out Florida
Teslathon 2003 for some pictures of strikes to the feed cables). No noticed
ill effects.

Later,

James
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, January 29, 2004 12:24 AM
Subject: Am I courting disaster?


 > Original poster: Dave Leddon <dave-at-leddon-dot-com>
 >
 >
 >
 > I recently re-cased a 10 KVA pig in acrylic to reduce the size and weight
 > of the thing.  See picture:
 > http://nick_tesla.home-dot-comcast-dot-net/TheVisiblePig.jpg
 > The finished size  ended up 11 x 11 x 14 inches with the volume of oil
 > dropping from 16 gallons to 2 and the weight from 300 to 170 lbs.  In the
 > process I reduced the external connections to the bare minimum, 240 volts
 > in and 14400 volts out and floated everything with respect to ground.
This
 > means that the coil tank circuit also floats which has a certain
 > appeal.  The performance of the coil is the same as it was when one side
 > the supply voltage was tied to the RF ground although the primary tuning
 > does seem to be a bit sharper.  My only concern about this configuration
is
 > what happens to the energy following a strike to the primary? It would
 > appear that the only path to ground would be back through the transformer
 > to utility power.  Do I need to install a lightning arrester between one
 > side of the tank circuit to the RF ground?
 >
 >