COMPOSITE ISOLATOR FOR AERIAL ELECTRIC LINES WITH A PROTECTED LEAKAGE CURRENT DETECTOR

摘要

A composite insulator (1) for overhead power lines, comprises a rigid core extending axially between two reinforcements (6) for attachment and on which is placed a finned envelope (5, 5 ') of electrically insulating synthetic material. It comprises a device for detecting the superficial leakage currents comprising an electrically conductive metal annular ring (7) surrounding the envelope between an end fin (5 ') adjacent to one of the two reinforcements (6) and another fin (5). ) adjacent to the end fin (5 ') extending radially overhanging above the ring (7). This ring (7) is connected by a lead (8) which passes through the end fin (5 ') to be connected to an electronic box (9) of the detection device.