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| MCCB Energy Let-Through vs. Irms for vent area https://brainfiller.com/arcflashforum/viewtopic.php?f=23&t=2489 |
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| Author: | Tim Incoll [ Tue Oct 16, 2012 5:28 pm ] |
| Post subject: | MCCB Energy Let-Through vs. Irms for vent area |
Hi all, I am new to the forum - so hopefully my question is worthy of your time. When considering the required vent area for a switchgear enclosure, how can the let-through energy of a MCCB determine this value? I performed similar studies incorporating the bolted fault current and detail of the phase separation/proportion of energy etc. though cannot seem to find a correlation. DATA- System fault level - 26.5kA MCCB operating time - 12ms Energy let-through - 4,110,173A2.s Variables of cable impedence/enclosure volume are immaterial atm, simply looking for procedure. Cheers |
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