A device for detection of defects of the insulation of a conductor of a transport line of electrical energy

摘要

Device for detection of isolation faults around an electricity supply line (12) supported by a pylon (10) has a coil mounted in a watertight box (18) that has a cylindrical opening so that it can be mounted around the top of an isolator cylinder (14). The coil detects a leakage current by induction and is connected to a control unit (22). Use of digital sampling and a microcomputer means that peak leakage currents can be recorded, and any leakage effects can be monitored over time.