On-site calibration device for mutual inductor of electric power system

The utility model discloses an electric power system mutual inductor on-site calibration device, which comprises a protection box and a sealing cover, the back surface of the sealing cover is hinged with the back surface of the top of the protection box through a hinge, a clamping mechanism is arranged between the top of the front surface of the protection box and the sealing cover, and the clamping mechanism comprises a clamping hook and a fixing box. The clamping hook is fixedly connected with the sealing cover, the fixing box is fixedly connected with the top of the front face of the protection box, and a mounting hole matched with the clamping hook is formed in the top of the fixing box in a penetrating mode. According to the field calibration device for the mutual inductor of the electric power system, through the arrangement of the clamping mechanism, the limiting hook clamps the clamping hook under the action of the first spring, the sealing cover and the protection box are reliably connected, the stru