RESISTANCE TYPE SENSOR FOR MEASURING PARTIAL ELECTRIC DISCHARGE

摘要

PURPOSE: A resistance type sensor for measuring partial electric discharge is provided to control constantly the amount of discharge generated from an insulator of the power cable by detecting quantitatively radio frequency partial electric discharge of a power cable. CONSTITUTION: A metal electrode(20) is formed by winding a metal material. An insulating layer(25) is formed on a surface of the metal electrode(20). The insulating layer(25) is formed by a polyethylene resin. A shielding layer(30) is formed by a metal material. The shielding layer(30) is formed partially at an outside of the insulating layer. A coaxial cable(40) is connected with the metal electrode(20) by a built-in lead line(41). A correction resistance(50) is connected with one side of the metal electrode(20). The metal electrode(20) is adhered on a semiconductor layer(13) of a power cable(10) in order to detect partial electric discharge from an insulator(12) of the power cable(10).