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| Does ARCPRO input expect bolted fault current or calculated arcing current? https://brainfiller.com/arcflashforum/viewtopic.php?f=15&t=1433 |
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| Author: | ekalbs4 [ Wed Dec 15, 2010 3:50 pm ] |
| Post subject: | Does ARCPRO input expect bolted fault current or calculated arcing current? |
I'm coming from having done IEEE 1584 calculations and I'm now starting to use ARCPRO. It is not clear to me whether I should input the available bolted fault current in ARCPRO or use this value to calculate the arcing current per IEEE 1584 and then input this lower value of arcing current into ARCPRO. I would appreciate some advice. |
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| Author: | jghrist [ Thu Dec 16, 2010 8:39 am ] |
| Post subject: | |
There is little difference between arcing current and bolted current at medium or high voltage. I have also found that with typical inverse time-overcurrent protection, using the bolted current with slightly faster clearing results in higher incident energy that a lower current with slower clearing time. As a result, I use bolted fault currents with ARCPRO. |
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| Author: | ekalbs4 [ Thu Dec 16, 2010 9:12 am ] |
| Post subject: | |
Thank you for the feedback. My first attempts at using ARCPRO were to compare the results for a given example that I had already analyzed using IEEE 1584. I'm realizing that the subtle difference between arcing current and bolted fault for this one case will become irrelevent once I start using ARCPRO to study across a range of fault currents. |
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