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ekstra   ara
 Post subject: Method of calculation for 34.45kV enclosed gear
PostPosted: Fri Feb 04, 2011 1:18 pm 

Joined: Tue Mar 02, 2010 1:50 pm
Posts: 25
Hi,
I'm doing an arcflash analysis of a wind farm. We have 34.5 kV go through a breaker at the base of the tower up to a transformer in the nacelle. I would consider the breaker in the base of the tower and the primary of the transformer enclosed. The software I use defaults to the Lee equation because the voltage is out of range of 1584, but I didn't think the Lee equation was good for enclosed equipment.
Is the Lee equation reasonable or conservative or would I be "underlabeling?"

Thanks,

W. Casey Harman


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