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Arc flash value
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Author:  Noah [ Thu Apr 19, 2012 2:05 pm ]
Post subject:  Arc flash value

We have been asked to put arc flash value on our distribution single line diagram. What kind of information you think that we should put on the drawing for each equipment? We used to put SC value for each bus but it is the first time for arc flash.

Author:  Zog [ Thu Apr 19, 2012 2:47 pm ]
Post subject: 

The calculated incident energy

Author:  M. Goodman [ Thu Apr 19, 2012 3:32 pm ]
Post subject: 

Maybe the arc flash boundary too since that's also important. But the drawing might become cluttered.

Author:  jvrielink [ Fri Apr 20, 2012 2:29 am ]
Post subject: 

See the attached image for an example (replace J/cm2 with cal/cm2 as applicable). The worst-case incident energy - separating line side, bus side and load side - and a label number that refers to your arc flash report for more information. You can remove load side calculations if you only consider the bus side. I make these to give a general impression of hazard levels and to make the IEEE 1584 results easier to navigate.

You could include all the calculation information like arcing current, clearing time, etc but in my view that's what a report is for. Just take care to clearly state on the single line when the incident energies are valid (ie worst-case for all switching scenarios except emergency operation for example).

Attachments:
Danger Warning Caution 1.jpg
Danger Warning Caution 1.jpg [ 3.06 KiB | Viewed 1906 times ]

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