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| DC Arc flash boundary https://brainfiller.com/arcflashforum/viewtopic.php?f=23&t=4267 |
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| Author: | mauricioville [ Thu Oct 20, 2016 8:13 pm ] |
| Post subject: | DC Arc flash boundary |
Could i use the (DB) empirically derived model equation of IEEE Std 1584-2002 to calculate the Flash-protection boundary (for box configurations) and the Lee (DB) equation (for open air configurations)? I can´t find a equation for DC Arc flash boundary. |
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| Author: | arcad [ Thu Oct 20, 2016 8:46 pm ] |
| Post subject: | Re: DC Arc flash boundary |
consider using equations 11 and 13 from http://arcadvisor.com/faq/dc-arc-flash- ... y-modeling for dc arc in open and arc in a box respectively. |
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| Author: | mauricioville [ Mon Oct 24, 2016 9:57 pm ] |
| Post subject: | Re: DC Arc flash boundary |
Thanks arcad for the equations. I read the IEEE 1584 again, and i have found that the AFB depends of the equation used to calculate the incident energy. In this case your equation its ok for me. |
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| Author: | arcad [ Tue Oct 25, 2016 8:03 pm ] |
| Post subject: | Re: DC Arc flash boundary |
No prob, mauricioville. FYI, this calculation procedure has been coded in DCAFA V3.0 software program and is very similar to the procedure proposed by Jim Phillips in Know Your Arc: DC arc flash calculations. It also takes into account circuit time constant when determining arc duration as a function of predicted arcing current, upstream protection device type and rating, and the fault time constant. |
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