RE: Why does running an NST on an async gap kill it?

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

Original poster: "Lau, Gary by way of Terry Fritz <teslalist-at-qwest-dot-net>" <gary.lau-at-hp-dot-com>

I believe there are MANY safety gaps out there that are set not to the 
maximum NST voltage, but to whatever is necessary to keep them from 
firing.  And, Terry's filter spec's MOV's for a 15kV NST.  If one uses a 
lower voltage NST and builds things verbatim without considering if the 
design needs to be modified, then a higher than rated voltage can be 
expected.

Gary Lau
MA, USA

 >Original poster: "Zagarus Rashkae by way of Terry Fritz 
<teslalist-at-qwest-dot-net>" ><arbitrarily_random-at-yahoo-dot-com>
 >
 >Hi Gary, All,
 >
 >I called it an "R-L-C" filter since the wirewound
 >power resistors do have significant inductance, and
 >they do help suppress spikes.
 >
 >I don't see how resonant rise can possibly destroy the
 >NST if there are MOVs and a saftey gap.
 >
 >Regards,
 >
 >Chris Lu