Power transformation overhaul protection device

The utility model relates to the technical field of power transformation maintenance, in particular to a power transformation maintenance protection device. The cabinet comprises a cabinet body and a cabinet door, the cabinet door is provided with a linkage lock, the linkage lock comprises a lock shell fixed in the cabinet door and a rotatable lock cylinder, the end, close to an inner cavity of the cabinet body, of the lock cylinder is connected with a first insulator, and the first insulator rotates along with the lock cylinder; a base is arranged in the cabinet body, a first electric conductor connected with an external power supply and a second electric conductor connected with an electric appliance in the cabinet body are arranged on the base, a third electric conductor is arranged on the first insulator, and when the linkage lock is in a locked state, the third electric conductor, the first electric conductor and the second electric conductor form a closed loop under the rotation of the first insulator;