RE: PTs

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

Original poster: "Loudner, Godfrey by way of Terry Fritz <twftesla-at-uswest-dot-net>" <gloudner-at-SINTE.EDU>

Hi Christopher

Some MOT's have only one high voltage lead, because the other lead is
connected to the core; and to short the HV coil, connect the high voltage
lead to the core. Some MOT's have two high voltage leads; and to short the
HV coil, connect the two high voltage leads together. However some MOT's
with two high voltage leads look like one of the leads is coming off the
core, but both leads are insulated from the core. If you connect the outer
lead to the core, you have not shorted the HV coil. It seems like you have
not shorted the HV coil, making the primary current see high inductance
which does not allow enough current to flow to the PT.

Godfrey Loudner  

> -----Original Message-----
> From:	Tesla list [SMTP:tesla-at-pupman-dot-com]
> Sent:	Saturday, April 14, 2001 12:25 AM
> To:	tesla-at-pupman-dot-com
> Subject:	PTs
> 
> Original poster: "Christopher Boden by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <chrisboden-at-hotmail-dot-com>
> 
> I have several PT's 2 rated at 14.4kV at 1kVA with a 120 primary and a
> whole 
> truckload of 2400VAC-120VAC 500VA (or are they 1K...hmmm Mark? you 
> remember?) and I want to test them to see if they work.
> 
> What should they read on an ohm meter?
> 
> I got an MOT and clipped off the 2 wires for the filament then connected
> the 
> sec lead around itself, still connected to the core.
> I connected the primary leads in series with the 14KV PT and
> got......squat. 
> The voltage was discusting, I had to TOUCH the wires to get ANYTHING and I
> 
> coulldn't draw ANY kind of an arc. It looked like getting about 100V at 
> best.
> 
> Why?
> 
> In the past I have connected an MOT directly to the wall as long as I
> didn't 
> draw an arc, nothing happened. Pull an arc, couple seconds later, tip the 
> breaker. Tried connecting the big PT straight to mains and 2 seconds after
> 
> plugging it in, BEFORE I drew an arc, it tripped the breaker.
> 
> POO!
> 
> Why?
> 
> help, I'm confused (as usual)
> 
> Christopher A. Boden Geek#1
> President / C.E.O. / Alpha Geek
> The Geek Group
> www.thegeekgroup-dot-org
> Because the Geek shall inherit the Earth!
> 
> 
> 
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