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Registered Member #2915
Joined: Fri Jun 11 2010, 10:41AM
Location: Malaysia!
Posts: 101
Hello to everyone! I own this beautiful NST with 15KV at 30mA Whilst trying to calculate my spark gap distance for my tesla coil, I measured the distance from where the arc first starts. It was about 2.5 cm, Is this correct? I was under the impression that air breaks down at approximately 30KV/cm I live in Malaysia and Its very humid here (70-90%) would that make a difference? I am using wire bent to form a 'U' shaped blunt point as the electrodes. Help?
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
For pointy electrodes it's approximately 10kV/cm for "common high voltages" (lets say ~5-30kV). 15kV has something like 21kV peak so it sounds ok to me.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Well I dont know but the 10kV/cm rule usually works well for me. I think you would need to use smooth spheres of x cm radius to get to the 30kV/cm figure...
Registered Member #834
Joined: Tue Jun 12 2007, 10:57PM
Location: Brazil
Posts: 644
30 kV/cm is the figure between planes. For points, or anything where the distance is much greater than the smaller radius of curvature, 10 kV/cm is reasonable. For spheres, you can find tables relating breakdown voltage, distance, and radius of the spheres. For large balls at small distance, you get 30 kV/cm.
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Breakdown of Air, My power supply 'aint following the rules.
