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Gap between conductors and distance, X factor for 15kV - 132kV

Discussion in 'IEEE 1584 - IEEE Guide for Performing Arc-Flash Ha' started by Yuna, Aug 29, 2009.

  1. Yuna New Member

    i found that IEEE 1583 provides the gap and distance information for 15kV below.May i know how to find the gap between conductors (mm) and distance, x factor for 33kV and 132kV?

    Thank you....
    Yuna, Aug 29, 2009
    #1

  2. Vincent B. Well-Known Member

    Above 15kV, you can't use the IEEE equations based on the stuff they blew up and the associated statistical analysis.
    You must use the theoretical IEEE equations which is simpler and doesn't have the X factor and gap.
    Vincent B., Aug 30, 2009
    #2

  3. Yuna New Member

    Dear Vincent,

    Sorry that i didn't get your point. Do you mind to mention the theoretical IEEE equations which are used to calculate the incident energy for the 33kV and 132kV? Thousand thanks.

    Yuna
    Yuna, Aug 31, 2009
    #3

  4. Vincent B. Well-Known Member

    See Equations D.7.4 and D.7.5(b) in Annex D of NFPA 70E-2009.
    Vincent B., Aug 31, 2009
    #4

  5. Yuna New Member

    Dear Vincent,

    i only manage to download the IEEE 1584 from my university. I fail to get the NFPA 70E-2009. can you write up the equaption? where can i manage to get the NFPA 70E? Thanks a lot...
    Yuna, Aug 31, 2009
    #5

  6. Vincent B. Well-Known Member

    There's supposedly a view-only version available from the NFPA (www.nfpa.org). Else you can buy it (pdf or paper) at the same location.

    I never had access to the full IEEE 1584, only what is quoted in NFPA 70E. So I can't tell you what are the equations number in it.
    Vincent B., Sep 1, 2009
    #6

  7. arcad New Member

    arcad, Sep 14, 2009
    #7

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