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Tim Incoll
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Post subject: MCCB Energy Let-Through vs. Irms for vent area  Posted: Tue Oct 16, 2012 5:28 pm |
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Joined: Tue Oct 16, 2012 5:18 pm
Posts: 3
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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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