Current transformer for high-voltage side of electric locomotive and electric vehicle unit

The utility model relates to a high-voltage side measurement or relay protection device of an electric locomotive and an electric vehicle unit, in particular to a current transformer for the high-voltage side of the electric locomotive and the electric vehicle unit, which comprises a mounting plate, an insulator and a coil device body, the coil device body is packaged in the side wall of the insulator; the coil device body comprises an iron core and a secondary winding, the iron core is in a circular ring shape, the outer surface of the iron core is wrapped with an inner buffer insulating layer, the secondary winding is wound on the outer side of the iron core, the outer side of the secondary winding is wrapped with an outer buffer insulating layer, and a secondary wiring terminal of the secondary winding is arranged on the P1 side of the insulator. The transformer is formed by pouring epoxy resin, and has the advantages of stable iron core performance, high measurement precision, small volume, flexible struc