Re: Doubling NST voltage? (fwd)

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---------- Forwarded message ----------
Date: Mon, 30 Oct 2006 11:39:27 -0800 (PST)
From: C. Sibley <a37chevy@xxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Doubling NST voltage? (fwd)

Thanks, I understand now, took me a while!

Curt.

>Precisely.  The reason the centertap is grounded in a NST is that it 
>makes it possible to insulate for only half the total output voltage. 
>That is, a 15 kV RMS (21kV pk) transformer would only need 11kV insulation.

>NSTs are a hugely cost sensitive device, and they don't spend a penny 
>more on insulation than they absolutely need to.

>They do breakdown if hooked up in series.  Typically, since the 
>secondary is connected to the core (at the midpoint), the breakdown 
>is core to primary (at least in my transformers I've tried this with)