Re: CD 942 failure tonight

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

Original poster: FutureT-at-aol-dot-com 

In a message dated 3/1/04 2:41:56 PM Eastern Standard Time, 
tesla-at-pupman-dot-com writes:

>Hi John,
>
>I've done a number of spice simulations of the phasing of an SRSG (120pps).
>The behavior seems to give the highest Cp voltage when phased about 1.5ms
>after peak (60Hz).  When I rephased later,  voltage dropped and when I
>phased earlier, at peak, and even before peak, the voltage dropped.  When
>the SRSG stopped, the voltage would drop to about half of rating.  Of course
>these simulation were with a Cp of about 3.1 * Cres where the steady state
>voltage (with no firing) was about 1/2 of rating.  I sorta concluded that
>with a proper valued Cp, I could not overvolt the Cp.  Could you elaborate
>on the abuse you are thinking of?
>
>Gerry R.


Gerry,

I don't know if John was using an LTR cap, I didn't really check
over the figures.  If it was LTR, then it shouldn't abuse the cap.

John