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>

The so-called Terry filter actually has two functional components:
1) The R-C (not R-C-L) filter forms a low pass filter, attenuating high 
frequencies.
2) The MOV's and safety gap form a clamp to limit the maximum voltage to 
the NST.

The R-C filter alone can't do anything to limit the voltage in the event 
that the gap is not firing.  The MOV's might help, but they're not designed 
to absorb too much energy, and they might burn out.

Gary Lau
MA, USA

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Thursday, August 07, 2003 11:38 AM
To: tesla-at-pupman-dot-com
Subject: Why does running an NST on an async gap kill it?


Original poster: "Zagarus Rashkae by way of Terry Fritz 
<teslalist-at-qwest-dot-net>" <arbitrarily_random-at-yahoo-dot-com>

Hi All,

I think I pretty much phrased the entire question in
the subject line :)

Is there anything one can to to protect the NST from
damage? Wouldn't an RLC filter like a Terry filter
protect the NST from spikes?

Thanks,

Chris Lu