DF3KV wrote:
> The IEC rating for N connectors is 1KV working voltage and 2.5KV proof
> voltage at sea level, 40-65Hz.
>
> 10KW into 50 Ohms results in less then 1KV, so that is OK with pulsed
> applications.
>
yeah.. and the Amphenol corrugated N is rated at 707 volts, which
corresponds quite nicely to 9996.98 Watts
And, as a practical note, they work to many kilovolts. The connector's
test condition/spec probably has some "work at altitude" aspect to it,
as well, so the actual design has air gaps compatible with 700-1000 volt
ratings.
Probably the limit is the e field between center conductor and shield.
Emax = V / ( Rinner * LN( Router / Rinner))
where:
Rinner is radius of the inner electrode
Router is the radius of the outer electrode
LN() is the log base e of the argument
V is the voltage between the electrodes
(from http://home.earthlink.net/~jimlux/hv/efield1.htm)
Rinner = .118
Router = .316
Emax = V/.116 inch
Air breakdown is roughly 70 kV/Inch
70 *.116 = 8 kV
The breakdown is likely to occur along a dielectric face, and the usual
rule of thumb is that the breakdown voltage is 1/3 that of free air, so
it looks like, by design, the N connector is good to around 2-3 kV.
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