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| DC Arc Flash Boundary https://brainfiller.com/arcflashforum/viewtopic.php?f=4&t=2315 |
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| Author: | McFlash [ Thu Jun 28, 2012 9:06 am ] |
| Post subject: | DC Arc Flash Boundary |
OK, Either I am searching for the wrong terms Or there really have not been any posts regarding this topic. Looking to perform a DC arc flash calculation for someone using Annex D in the 2012 70E but I don't find any mention about the arc flash boundary. I am thinking that I could use the IE to back calculate the equivalent boundary but am not sure. Any comments or guidance would be great. |
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| Author: | Vincent B. [ Thu Jun 28, 2012 11:02 am ] |
| Post subject: | |
The definition of the AFB is where the IE is 5 J/cm^2 for systems 50 V and greater (see 130.5(A)). So yes, you can backcalculate it. The same is done in D.7.5, except the equation is explicit. |
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| Author: | lsilecky [ Mon Jul 09, 2012 8:31 am ] |
| Post subject: | |
You can also try CSA Z462-12 Annex D Table D.5 and pages 102 and 103. |
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| Author: | Vincent B. [ Mon Jul 09, 2012 8:43 am ] |
| Post subject: | |
lsilecky wrote: You can also try CSA Z462-12 Annex D Table D.5 and pages 102 and 103. That's for AC, not DC. Only D.8 is about DC, and it's not explicit how to calculate the AFB for DC. |
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| Author: | arcad [ Thu Jul 12, 2012 7:23 am ] |
| Post subject: | |
check please this forum thread http://www.arcflashforum.com/threads/2332/ on how to calculate DC arc flash boundary. |
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