Current sensor for polluted insulator leakage of AC high-voltage electric transmission line

The invention relates to a current sensor for the polluted insulator leakage of an AC high-voltage electric transmission line, in particular to a current sensor for monitoring pollution flashover of an electric transmission line. The current sensor mainly comprises a Rogowski coil with an iron core, a copper shielding shell and a coaxial cable joint and is characterized in that the iron core of the Rogowski coil is in a two semi-circle ring shape and is provided with two windings; and the shielding shell consists of a hollow groove in the two semi-circle ring shape and an upper cover in the two semi-circle ring shape. The invention has the advantages of simple assembling and disassembling process, very convenient field assembly and disassembly, high leakage current measuring precision, wide frequency band, good linearity, safe and reliable operation, and the like, thereby being widely used for newly-established and operated high-voltage electric transmission lines.