Re: MMC question

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net> 


Hi Luke,

The 942C series of caps are great.  However, with a 15KV NST (this is RMS
voltage), the peak voltage will be just over 21000 volts not counting other
effects such as resonant rise and inductive kick.  A 10 cap string, IMO,
will be insufficient for this transformer.  I would say a minimum of 12 and
propose a 14 cap string instead.  LTR for SRSG will certainly keep resonant
rise down and the SRSG will take advantage of inductive kick.  Also, for a
given operating voltage, going to a larger string will reduce the peak and
RMS currents in that particular string with everything else the same (BPS
and Lp).

Gerry R


 > Original poster: "Luke" <Bluu-at-cox-dot-net>
 >
 > I have decided on the capacitors that the geek group recommend.
 > The ones I have on order are the 0.15 micro farad and rated at 2KV.
 > If I run these with sets of 10 in series they would have a voltage rating
 > of 20KV
 > I will be using a 15KV NST.
 > The cap size will be LTR and I am going to use a SRSG
 > Does it seem like I am cutting the voltage rating a bit close or will
these
 > caps hold up to that?
 > Any one have any experience with these.
 > I would rather drop my capacitance a little and put another one in series
 > for a 22KV rating if it is needed
 > But if I feel VERY confident they will hold up with 10 in series I want to
 > go that way.
 > I don't want performance at the expense of needed up keep due to cap
failures.
 >
 > Luke Galyan
 > Bluu-at-cox-dot-net
 >
 >
 >