Re: NST's ARE ALL DEADLY !!!!!!!!

• To: tesla-at-pupman-dot-com
• Subject: Re: NST's ARE ALL DEADLY !!!!!!!!
• From: "Pat Manning" <p.manning-at-snet-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Sun, 05 Mar 2000 11:29:29 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

I wonder about this too- perhaps it has something to do with the
windings and the core of the transformer acting as a capacitor and
storing a charge?  The company I work for manufactures industrial
microwave generators.  The HV power supply is three-phase, full-wave
rectified and filtered by a choke.  Nary a cap anywhere in the circuit. 
The transformer primaries are in a delta configuration and fed by a
simple on/off three pole contactor, and the secondaries are a wye
config, connected to the full wave bridge (six diodes, two per leg).  On
more than one occasion after shutting one off, (several minutes after
shutting one off) I have been nipped by a slight shock between the open
primary leads and ground.  This has happened often enough that I've
taken to grounding the primary of the transformer before touching
anything, and often see a small spark as I do so.

Stumped in CT as well

Pat

Tesla List wrote:
> 
> Original Poster: Megavolt121-at-aol-dot-com
> 
> Paul,
>     I didn't have anything across the leads and i shorted it by touching a
> piece of metal to both poles of the ladder. I'm still trying to figure out
> why the heck i got shocked! I'm open to all suggestions. One possibility is
> that the nst possibly had a PFC built into it and it held a charge and when i
> touched the poles it used the PFC charge to shock me?
> Stumped in southern Ca.
> -Alan

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