Protection device based on electrical instrument

The utility model belongs to the technical field of electrical instruments. The utility model relates to a protector, in particular to a protector for electrical instruments. The device comprises an instrument fixing frame and a protective cover plate arranged on the front surface of the instrument fixing frame, four fastening bolts which are symmetrically distributed are connected to the outer portion of the instrument fixing frame in a threaded and sleeving mode, an electrical instrument is arranged in the instrument fixing frame, one ends of the four fastening bolts make contact with the outer portion of the electrical instrument, and a protective cover plate is arranged on the front face of the instrument fixing frame. An instrument fixing frame used for protecting an electrical instrument and protecting the exterior of the electrical instrument is arranged outside the electrical instrument; and through attraction between the adsorption magnet and the iron sheet plate and between the S-pole magnet and the