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An In Depth look at Hubbell's Distribution Arresters.
Protecta*Lite® Systems Surge Arresters
Line surge arresters behave like insulators at normal line to ground voltage. However, when the arresters are subjected to a high voltage surge, they become conductive and divert surges to ground preventing the external flashover of an insulator.
Hubbell Power Systems - Metal Oxide Varistor Overview
Overview of the features and production of Hubbell's MOV disc. The heart of the Surge Arrester.