Arc Flash Medium Voltage Vaccuum CB Switchgear

[mshields]

Does anyone know what kind of clearance is required above this type of gear? I'm wondering what is required to cope with an arc flash that is directed out of the top of the gear?

Thanks,

Mike

 

[jim dungar]

If your switchgear is actually designed to vent the arc flash out of its top (i.e. listed as Arc Resistant), the manufacturer should provide you with the clearances required.

 

[SG-1]

Does anyone know what kind of clearance is required above this type of gear? I'm wondering what is required to cope with an arc flash that is directed out of the top of the gear?

Thanks,

Mike

Is this question generic or do you have actual gear ?

 

[jdsmith]

Our 38 kV arc resistant gear requires 48" of clear space above vented sections. Our plenum has a total of 7 top-vented sections on a 21 unit lineup. If you don't have that much headroom available they will duct the plenum outside instead of venting it upward - this would eliminate the 48" requirement. I don't have any experience with 5 kV or 15 kV arc resistant switchgear.