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240/480V 1phase

Discussion in 'General Discussion' started by ronlow00, Oct 8, 2009.

  1. ronlow00 New Member

    Anyone figure out how to simulate this in EasyPower or how to calculate the hazards for this type of system?
    ronlow00, Oct 8, 2009
    #1

  2. THE CABLE GUY Well-Known Member

    I have talked to ESA about this. As of now there is no AF calculations for single phase voltages that they utilize.

    You have a couple of choices.
    Click on the bus properties open the Arc FLash tab, 1. You can exclude the calculation until proper data creates a software upgrade to include single phase faults. 2. You can reference the upstream protective device and put in a simulated fault clearing time say 0.3sec. 3. You can enter the cal's/cm2 as a value you have calculated or your plans say to use for such cases as a default.
    THE CABLE GUY, Oct 9, 2009
    #2

  3. THE CABLE GUY Well-Known Member

    I seen were Zog posted this comment about SKM and single phase modeling.

    Zog says, "You need to purchase the single phase module from SKM."
    THE CABLE GUY, Oct 19, 2009
    #3

  4. amohammed New Member

    SKM does not calculate arc flash incident energy for the single phase system either. The single phase module they have is good for load flow studies and short circuit studies.
    A conservative approach to modeling the single phase system is to model it as a 3-phase system. Your software can then use the 1584 equations to provide you the desired results.

    There are couple of threads in this forum which discuss more on this subject.

    Regards.
    amohammed, Oct 29, 2009
    #4

  5. WDeanN Well-Known Member

    I haven't seen it, but the latest advertisement from ETAP is that they perform single phase arc flash studies.
    I would like to know what there calculation is based on.
    WDeanN, Oct 29, 2009
    #5

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