POLLUTION-PROOF INSULATORS

摘要

The ceramic insulator has one or more sheds (3) integrally formed with the central core (1) so that each shed extends outwardly from the core. Each shed has an annular bit (10) extending downward from lower surface thereof. To increase the pollution resistance of the insulator by suppressing local arcs, the lower edge (13) of the rib (10) extends outwardly with respect to the central core.