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Re: Doubling NST voltage? (fwd)
Original poster: List moderator <mod1@xxxxxxxxxx>
---------- 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)