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Minimum clearances for MV motor terminals in Ex motors

Minimum clearances for MV motor terminals in Ex motors

Minimum clearances for MV motor terminals in Ex motors

(OP)
I am looking for minimum clearances in air between motor terminals (phase to earth and phase to phase) in Ex MV motors (3.3, 6.6 & 11 KV) used in petroleum refineries. Is phase segregation a must in Ex MV motors ? Anyone got a linky to any standards on that ? Thanks.

Muthu
www.edison.co.in

RE: Minimum clearances for MV motor terminals in Ex motors

Best reference will, I think, be BS EN 60079-7 which covers Ex e equipment and has a reasonable amount dedicated to electrical machines including clearances and creepage distances. I don't recall anything in the BS EN 60034 series specific to hazardous area machines.
  

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If we learn from our mistakes I'm getting a great education!
 

RE: Minimum clearances for MV motor terminals in Ex motors

(OP)
Thanks Scotty. Any chance I can get an el cheapo version (like for free) of that standard on the netz ? ponder

Muthu
www.edison.co.in

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