ELECTRIC OVERVOLTAGE ARRESTERS WITH IMPROVED ELECTRODE DESIGN

摘要

An electric overvoltage arrester having a housing, a pair of spaced carbon electrodes, an annular insulating spacer within the housing and an assembly carried by the housing to hold the electrodes and spacer within the housing is provided for use in protecting electrical transmission lines from in-line voltage surges. One of the electrodes is recessed within the annular insulating spacer to define a gap distance between the opposing faces of the electrodes and the second electrode has a plurality of grooves cut in its upper and lower surfaces to define a pattern of grooves and plateau areas.