There are multiple terms in the catalog tables presenting data on various distances. What do each of these terms mean?

Dry Arc Distance - the shortest distance across the insulator surface between the ground and energized portion of the insulator.
  • Sometimes referred to as “strike distance” or “tight string distance”
  • A major determinant in defining insulator flashover and withstand values
Leakage Distance - the distance between the energized and ground portions of the insulator moving in and out of the sheds
  • Also referred to as “creep” or “creepage distance”
  • Most critical in highly contaminated areas
Section Length - the straight-line distance between the connecting points of the insulator end fittings  
  • Referenced to ensure that the insulator “fits” properly in a given application

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