Re: [TCML] surge arrestor for pole pig

[Yurtle Turtle <yurtle_t@xxxxxxxxx>]

I use both on the HV side and a TVSS on the low side:

http://www.hot-streamer.com/adam/bigass_coil/schematic.pdf

Adam


--- On Thu, 9/18/08, J. Aaron Holmes <jaholmes@xxxxxxxxxxxxxxxxxx> wrote:

> From: J. Aaron Holmes <jaholmes@xxxxxxxxxxxxxxxxxx>
> Subject: Re: [TCML] surge arrestor for pole pig
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Date: Thursday, September 18, 2008, 11:32 AM

<snip> 
> I would be reluctant to use ceramic arresters in place of a
> safety gap for the same reason ceramic arresters have
> generally been abandoned by the power industry in favor of
> polymers:  Pressure caused by arcing inside the ceramic kind
> may cause them to shatter violently!
> 
> Back when I first started collecting and reading about
> arresters, I thought the idea of using one in place of a
> safety gap was a cool idea.  The more I read about them and
> ponder this application, however, the more skeptical I
> become.  As a secondary measure, maybe.  Like in a Terry
> Filter.  But without a safety gap?  I don't know.  A
> properly-set gap ought to clamp down faster.  Plus
> you'll see it operate.  If the arc fails to die of
> natural causes, it won't destroy your safety gap as it
> might an arrester.  The fault-clearing capability of the SiC
> or MOV elements doesn't seem like a big advantage to a
> Tesla coiler; if you're worried about clearing faults in
> your safety gap as quickly as possible, you've probably
> got other design issues you should be confronting instead! 
> My $0.02, anyway.
> 
> Cheers,
> Aaron, N7OE
> 



      
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