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| Help me about IEEE1584 https://brainfiller.com/arcflashforum/viewtopic.php?f=4&t=597 |
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| Author: | peter81 [ Fri Jul 24, 2009 8:31 am ] |
| Post subject: | Help me about IEEE1584 |
Hi all, my name is Peter Cadili. I'm an italian electrical engineering student. I'm preparing my thesis about arc flash hazard..Please help me for comprise two questions: 1. In the Iarcing formula, comparison in the exponent the Ka parameter equal -0.097 in the box configuration and -0.153 in the air configuration. Why exist this difference beetwen parameters Ka? 2.The normalized incident energy is calculated at t=o.2 sec and at the distance =610 mm. why this choices? Thank you at all for your precious help! Ah, and excuse me for my bad english! |
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