Personal Arc Protection Calculation
Personal Arc Protection Calculation
(OP)
folks,
does any of you know the basic empirical equations used to calculate arc-flash energy produced by fault currents on 13.8 kV system. I've calculated the SC current on our system but I don't know how to convert the results into arc energy required to specify protection cloth/tools.
I appreciate your help and feedback.
Thanks in advance
does any of you know the basic empirical equations used to calculate arc-flash energy produced by fault currents on 13.8 kV system. I've calculated the SC current on our system but I don't know how to convert the results into arc energy required to specify protection cloth/tools.
I appreciate your help and feedback.
Thanks in advance






RE: Personal Arc Protection Calculation
http://www.skm.com/support/kb/120004.doc
RE: Personal Arc Protection Calculation
Enclose please find a simple version in Excel based in IEEE Std 1584.
http://grouper.ieee.org/groups/1584/simple.xls
RE: Personal Arc Protection Calculation
RE: Personal Arc Protection Calculation
The generic table in 70E for when calcs are not available, require calcs to use it. You have to determine the bolted fault current and clearing times of the OCPD (which requires calculation of the arc flash fault current).
RE: Personal Arc Protection Calculation
The tables are provided 'in lieu of the detailed flash hazard analysis approach', which involve the incident energy calculations mentioned by tmaly.
RE: Personal Arc Protection Calculation
http://www.saftgard.com/heatflux.htm
RE: Personal Arc Protection Calculation
If you are trying to develop an electrical safety program to comply with NFPA-70E requirements on arc-flash protection, you should probably buy NFPA-70E and also IEEE-1584, although there is no inexpensive way to purchase the IEEE standard.
RE: Personal Arc Protection Calculation
I was overwhelmed by the responses and help I got from all of you. I'm really grateful to be part of this great community. I appreciate you sharing your knowledge and experience with me. May God bless you all
millions thanks
RE: Personal Arc Protection Calculation
The Bussmann website has some very useful data on Arcflash - suggest you take a ganders at their website
Using IEC269 / BS88 Fuses is a good way to reduce the I2t and therefore reduce Arcflash
http://www.bussmann.com/apen/pubs/spd/
_______________________________________
Regards -
Colin J Flatters
Consulting Engineer & Project Manager