Re: Break-down voltage of gaps and humidity

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Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net> 


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, November 14, 2003 4:51 PM
Subject: Re: Break-down voltage of gaps and humidity


 > Original poster: dhmccauley-at-spacecatlighting-dot-com
 >
 > What is really weird is that in very humid conditions, it seems corona
forms
 > more readily.  There are two instances that come into mind:
 >
 > 1.  When doing hi-pot or corona testing on high voltage cabinets (i.e. big
 > radar transmitters, hv linear supplies, etc....), there are always more
 > corona hisses
 > and spits during those most humid days than on drier days.
 >
 > 2.  When bicycling up in the mountains, it is always on those most hot and
 > humid of nights that the power lines on big HV transmission lines spit and
 > hiss more.
 >

What you're hearing is surface leakage, aggravated by deposits and crud on
insulators that gets wet/damp.