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I first posted this under Acoustics

I first posted this under Acoustics

I first posted this under Acoustics

(OP)
I first posted this under Acoustics/Vibration Engineering, but this forum might be more appropriate.

I need to know what kind of mechanical loading (I would assume shock load) is produced when a 22kV circuit is shorted. Experience from real life says that a wall some distance away (approx 0.5 m) is destroyed (part of the wall blown away).

Can anyone point me to where I can find information??

I am a mechanical engineer, so any explanations of what happens from an electrical point needs to be fed by teaspoons, I'm afraid. If I can get an expression of the shock load (magnitude, form, duration) I will apply that to the wall to determine plate thiskness and support design.

Thanks a lot!

RE: I first posted this under Acoustics

I'm neither a power engineer nor working with Acoustics/Vibration myself, but we have a few people doing Acoustics/Vibration Engineering here.

I take you have a certain amount of power in your 22 kV feed ?
(I would not expect mA would blow down a wall unless maybe of paper

The spark from a major short circuit can, however, produce quite a large shock wave. (Think about lightning and thunder)
Something to do with expanding, super heated air/plasma.

I would guess the amount of power available could give a better estimate of the damage to expect.

RE: I first posted this under Acoustics


A classical paper on the matter is Pressures Developed by Arcs, Ralph H. Lee, Transactions on Industry Applications, vol. 1A-23, No 4, July/August 1987 from IEEE.org
  

RE: I first posted this under Acoustics

(OP)
Thanks for info. The article from Busbar was just what I was looking for.

Thanks

RE: I first posted this under Acoustics

Thread 238-6424 has some very interesting discussion of the energy dissipated from a short circuit including the TNT equivalent energy.

RE: I first posted this under Acoustics

Suggestion: Transactions on Industry and Applications Vol. 1A-23 should read IA-23, just in case it is searched for in databases.

RE: I first posted this under Acoustics


Thank you for the correction, jbartos.  I also failed to mention that the subject paper is available as a free online pdf from one of the IEEE societies.

http://www.ieee-pcic.org/archive/arcs.pdf
  

RE: I first posted this under Acoustics

(OP)
Thanks a lot for info. I have already downloaded the article by Lee, and found some very interesting info on thread 238-6424.

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