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Re: Official air breakdown voltage?



Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>

Hi Mike,

Yes, I remember that video clip. I believe Bert Hickman posted it on his Stonridge Engineering high voltage page. IIRC, it was a 500 kV line (I assume ~289 kV single phase to ground), which is A LOT more than 12 kV. However, I, like you,
would have been curious to see just how long, both time
wise and length wise, that arc would have gone unhendered ;^)

David Rieben

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, November 28, 2005 11:12 AM
Subject: Re: Official air breakdown voltage?


Original poster: "Mike" <mike.marcum@xxxxxxxxxxxx>
That 33300 kVA spark that was posted awhile back was arcing probably 70 feet and was actually cut short. Wish they woulda let it run for a min or 2 to see how far it woulda grew.
Mike
----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, November 28, 2005 2:20 AM
Subject: Re: Official air breakdown voltage?

Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>

JT,

Hmm, 12 kV at 5000 amps, that's 60,000 kVA! I'd think
that you could draw a plasma arc over 20 ft. with that
kind of power, assuming that you didn't get FATALLY burned by being as close as would be required to pull this stunt! Think
of the incredible flash arc plasma you see when a main primary
power line gets a fault circuit short across it and that would be
what you would experience by discharging continuous 12 kV,
5000 amp electrical source! It would be one heck of a site, but
unless you were positioned >50 ft. from the spark source, you most likely wouldn't live to tell about it!

David Rieben


----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, November 27, 2005 7:29 PM
Subject: Re: Official air breakdown voltage?


Original poster: "JT Bowles" <jasotb@xxxxxxxxxxx>
Drawn arc, I do believe. If you start at 1' and use 12KV, with 5000amps of current, you wont get a spark at all. But if you begin with a drawn arc, you may get it to STRETCH to 1'.
Clear?

From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: Official air breakdown voltage?
Date: Sun, 27 Nov 2005 12:39:32 -0700

Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>

At 09:03 AM 11/27/2005, Tesla list wrote:
Original poster: "JT Bowles" <jasotb@xxxxxxxxxxx>

exactly. a 12KV spark, at 30MA may only be 1/2 inch long. But, at thousands of amperes, it can stretched to over a foot


Distinguish, here, between a spark and a "drawn arc"... Spark means jumping across the gap. Drawn arcs are totally different.