Protective device of electrical instrument

The utility model discloses a protective device of an electrical instrument, which comprises a box body, the upper side and the lower side of the box body are both provided with mounting ports, the surfaces of the mounting ports are connected with radiators in a sliding manner, the upper side and the lower side of the box body are both provided with screw holes, and the upper side and the lower side of the box body are both in threaded connection with the radiators through screws. And heat dissipation holes are formed in the upper surface of the heat dissipation device, and a motor is fixedly connected to the inner bottom of the heat dissipation device through a supporting rod. According to the protection device of the electrical instrument, radiators can be installed through the installation openings in the upper side and the lower side of the box body, wind can flow from bottom to top through the arrangement of the two radiators, heat dissipation of the electrical instrument is completed, damping of the nar