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Re: Really wired them in series? (Yes...)
They were three 7.5 kV, 30 mA units, 22.5kv in series.
Sorry for any confusion.
Chris.
--- Tesla List <tesla-at-pupman-dot-com> wrote:
> Original Poster: "Reinhard Walter Buchner"
> <rw.buchner-at-verbund-dot-net>
>
> Hi Chris,
>
> >Original Poster: Chris Tominkson
> <internetinbox-at-yahoo-dot-com>
> >
> >It works good, I managed to short three of mine
> wired
> >in series and I fixed them all like that. I started
> >them out at 250 degrees (F) and I think they ended
> up
> >on 400 degrees in a couple hours.
>
> Do you really mean wired in SERIES?? (45kV end to
> end
> output)? Your xformers are center tapped. This means
> the
> insulation of the xformer only has to hold up to
> 7.5kV above
> ground. Wiring them in series really strains the
> insulation
> and I am pretty sure they WILL fail again. In a
> "three in series
> configuration" you canīt earth any connection. One
> thing to
> remember with NSTīs is, that they are NOT designed
> to run
> unloaded. The HV, they supply, is only needed to
> ionize the
> gas under normal (= neon tube) operating conditions.
> As
> soon as the gas is ionized (and the neon sign is in
> "conduction
> mode", the voltage breaks down to around 300-900V
> (as they
> are current limited). Using 45kV as a power source
> for a Tesla
> coil will get you all sorts of headaches (like
> corona, hard to find
> / make caps, etc.) There really is no advantage of
> going above
> 16-20kV as input voltage. TC spark length depends on
> input VA
> and input Joules, not on input voltage. Total VA
> rating remains the
> same if you parallel or series the 3 xformers.
>
>
> Coiler greets from germany,
> Reinhard
>
>
>
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