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5kv bus bar question 1

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kvar

Industrial
Oct 31, 2006
2
have been trying to find info on 5kv bus bar spacing insulated and non insulated. age tends to confuse recall. any help appreciated.
 
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I don't have a documented reference for this other than what I was told by a switchgear tech. The enclosed bus in a metal clad switchgear, uninsulated, requires about 1" per kV to ground. So on a Wye connected 4.16kV (5kV) system, you would require 2.4" of clearance from the bus to ground.

Hope that helps.
 
Dear kvar,
Over here, we are referring to BS159 where the minimum clearance between phases in air for 3.3kV & 6.6kV are 2" and 3.5" respectively. Sorry, no reference on 5kV for you.
 
ANSI C37.32-1972 Table 8 lists 4.76kV Indoor Air Switches and Bus Supports Phase Spacing as 9" for insulator centerline-to-centerline for classes A10, A20, A30, and B40, and 4.5" metal-to-metal clearances.
 
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