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Re: Safety Gap (Lightning Arrestors)




From: 	Andrew Chin[SMTP:chinny-at-ozemail-dot-com.au]
Sent: 	Sunday, November 16, 1997 5:52 PM
To: 	Tesla List
Subject: 	Re: Safety Gap    (Lightning Arrestors)

I don't know much about Gas Arresters in Tesla coil use, but if you want
to try and suss out the statitistics, you're more than welcome to.


--------------------  a
         |
         |
     ---------
     |       |
     |       |------  c
     |       |
     ---------
         |
         |
--------------------  b

Discharge Current
	(8/20uS pulse)	(a+b-c)		20000A
			(a-c,b-c)	10000A
	(AC 50Hz)	(a+b-c)		20A
			(a-c,b-c)	10A

Sparkover Voltage
	(DC)		(a-c,b-c)	480-720V
	(Impulse)	(a-c,b-c)	<1200V

Insulation Resistance
			(-at- 100V)	>10^10 ohms

Capcitance		(a-c,b-c)	<2.2pF
			(a-b)		<1.2pF

Andrew Chin	chinny-at-ozemail-dot-com.au

Tesla List wrote:

> From:   Richard Wayne Wall[SMTP:rwall-at-ix-dot-netcom-dot-com]
> Sent:   Saturday, November 15, 1997 11:56 AM
> To:     Tesla List
> Subject:        Re: Safety Gap    (Lightning Arrestors)
>
> 11/15/97
>
> I recently came across some high voltage lightning arrestors for $5
> each.  They are the type that have a ceramic housing and 90 gazillion
> small nonfixed p-n junctions inside.  They conduct great amounts of
> joules at 10 kv.  I'm currently running 3 12 kv 60 ma neons in
> parallel
> on a conventional coil.  I'm thinking about replacing the two safety
> sg's with two of them.  I have no idea what their turn on time is, but
>
> a lightning strike must be pretty fast.
>
> Anyone have experience with lightning arrestors or any thoughts
> whether
> they could be used to replace the safty sg's?
>
> RWW