Re: Why no corona?

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

Original poster: "Christopher Boden by way of Terry Fritz <twftesla-at-qwest-dot-net>" <chrisboden-at-hotmail-dot-com>

They actually do have problems with corona I would guess. I know for a fact 
that I've heard the familier hiss on more than one occasion while standing 
under a HV line. Also remember that the really high voltage lines are rather 
rare. Sure, there are transmission lines that run up to 768kV or better. 
I've even heard of megavolt lines (anyone know where these are?) that run 
across deserts. But the vast majority of power lines are small, under 
14.4kV. Also, while we run at 400kV regularly, their 400kV would act a lot 
differently. Even though the voltage is the same, the frequency is a lot 
different. And weather it's a megavolt line across a desert, or the 120 in 
your wall outlet, it's ALL at 60hz. Things get freaky with frequency.

I've heard corona on humid or rainy days, and in the winter (when it's 
really dry) as well. I've seen the long, graceful bends in HV Buss at 
substations (corona likes sharp points). So my guess would be that they DO 
have problems with corona, you just don't notice it much because it's very 
quiet compared to the usuall surroundings, and it's not bright enough to 
attract attention, in fact, in broad daylight it's difficult to see a 6' arc 
from a TC, a little purple glow, never.





Christopher "Duck" Boden Geek#1
President / C.E.O. / Alpha Geek
The Geek Group
www.thegeekgroup-dot-org
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>Original poster: "Richard W. by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><potluck-at-xmission-dot-com>
>
>Hi list,
>Was wondering.
>Power transmission lines, before a substation, can carry from 100Kv to more 
>the
>600Kv. So why no corona? Seems we battle corona quite a bit at much lower
>voltages. <shrugs>
>
>Rick W.
>Salt Lake