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 Post subject: 240/480V 1phase
PostPosted: Thu Oct 08, 2009 12:24 pm 
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Joined: Thu Oct 08, 2009 12:16 pm
Posts: 11
Location: St. Paul, MN
Anyone figure out how to simulate this in EasyPower or how to calculate the hazards for this type of system?


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PostPosted: Fri Oct 09, 2009 12:41 pm 
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Joined: Sun Aug 16, 2009 8:42 am
Posts: 184
Location: Lawrenceburg KY
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.


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PostPosted: Mon Oct 19, 2009 1:34 pm 
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Joined: Sun Aug 16, 2009 8:42 am
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Location: Lawrenceburg KY
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."


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PostPosted: Thu Oct 29, 2009 1:02 pm 
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Joined: Thu Jun 11, 2009 12:38 pm
Posts: 33
Location: Kansas city
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.


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PostPosted: Thu Oct 29, 2009 1:05 pm 
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Joined: Thu Jul 19, 2007 7:54 am
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Location: St. Louis, MO
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.


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