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IEVref:471-01-16ID:
Language:enStatus: Standard
Term: unified specific creepage distance
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Definition: creepage distance of an insulator divided by the r.m.s. value of the highest operating voltage across the insulator.

NOTE 1 – This definition differs from that of specific creepage distance where the line-to-line value of the highest voltage for the equipment is used (for AC systems usually Um/√3). For line-to-earth insulation, this definition will result in a value that is √3 times that given by the definition of specific creepage distance in IEC 60815 (1986).

NOTE 2 – For ‘Um’ see IEV 604-03-01.

NOTE 3 – It is generally expressed in mm/kV


Publication date:2007-05
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Internal notes:2015-06-22: Adjective a.c. replaced by AC. JGO
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