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Re: Transformer (2500 volt)
Subject: Re: Transformer (2500 volt)
Date: Wed, 14 May 1997 05:16:29 +0500
From: "Alfred A. Skrocki" <alfred.skrocki-at-cybernetworking-dot-com>
To: Tesla List <tesla-at-pupman-dot-com>
On Wed, 14 May 1997 02:53:33 GMT Jim Fosse
<jim.fosse-at-bjt-dot-net>
> Alfred,
> If the oil burner transformers are not current limiting, how
> do they drive a gas discharge / arc (the spark plug used to light the
> oil) without their secondary current becoming infinite? Gas
> discharges inherently display a negative resistance property. If they
> are not current limited (for any voltage above their sustaining
> voltage) they will draw as much current as it takes to lower the
> voltage across them to that voltage. Two examples come to mind:
> Mercury vapor: 12V, Neon: 60V. I don't remember the voltages for
> Nitrogen.
On all the oil burner transformers I have found that did not have
current limiting, I found that the electrodes that comprise the spark
gap have a rather high resistance, around 100K ohms each, this would
limit the current. I also found one with a series choke in the
primary circuit to current limit it.
Sincerely
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Alfred A. Skrocki
alfred.skrocki-at-cybernetworking-dot-com
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