Re: [TCML] surge arrester for pole pig

[Yurtle Turtle <yurtle_t@xxxxxxxxx>]

After I sent this, I realized that I misspoke. The arresters we use at work are in three phase 12.47 kV gear, which works out to 7.2 kV phase to ground. I confirmed that they are rated at 12 kV, not 15. They were originally 9 kV, but were later upsized to 12.

Adam


--- On Thu, 9/18/08, Yurtle Turtle <yurtle_t@xxxxxxxxx> wrote:

> From: Yurtle Turtle <yurtle_t@xxxxxxxxx>
> Subject: Re: [TCML] surge arrestor for pole pig
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Date: Thursday, September 18, 2008, 5:36 AM
> When I "liberated" my Westinghouse 25 kVA 14.4 kV
> pig:
> 
> http://www.hot-streamer.com/adam/garage/pig_14.4kV_25kVA_1.jpg
> 
> http://www.hot-streamer.com/adam/garage/pig_14.4kV_25kVA_2.jpg
> 
> http://www.hot-streamer.com/adam/garage/pig_14.4kV_25kVA_3.jpg
> 
> it was mounted on the pole with a "Surgemaster LV
> Arrester USA 7-78 18 kV Gap 1":
> 
> http://www.hot-streamer.com/adam/garage/gap_18kV_1.jpg
> 
> http://www.hot-streamer.com/adam/garage/gap_18kV_2.jpg
> 
> Since 14.4 kV RMS is over 18 kV Peak, I'm assuming the
> arrester is also rated in RMS. I know we use 15 kV arresters
> at work for 12.47 kV.
> 
> I thought it was interesting that the arrester calls itself
> a "gap". A quick Google search indicates that
> "Surgemaster" was apparently never copywrited,
> making it difficult to find anything on it.
> 
> However, I'm using mine on my coil without any problems
> so far, even when pushed to 280 volts.
> 
> Adam
> 



      
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