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| Incident Energy Calc of Faulted MV Cable in Manhole https://brainfiller.com/arcflashforum/viewtopic.php?f=23&t=1766 |
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| Author: | jtinge [ Wed Jun 29, 2011 1:25 pm ] |
| Post subject: | Incident Energy Calc of Faulted MV Cable in Manhole |
It has been suggested by some of my colleagues that IEEE 1584 equations can be used to calculate the incident energy resulting from a faulted MV cable in a manhole. Am I correct in my understanding that the equations in IEEE 1584 are only applicable to a fault between conductors having an air gap? If this is correct, I don't see how the equations are applicable to finding the incident energy of a faulted medium voltage cable that won't have any air gap between phases or to the grounded shield. The only way I can trick the software to making this calculation is to insert a bus with an air gap at the manhole location, but this does not realistically model a faulted cable or splice and I don't have any confidence in the results. Does anyone have any experience or guidance with this situation? |
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| Author: | Zog [ Wed Jun 29, 2011 5:22 pm ] |
| Post subject: | |
I agree with you, not to mention you are in a manhole and the dynamics of the whole space are different. |
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