DSN-J electromagnetic lock is an interlocking device for electrical control mechanism to prevent misoperation of high-voltage switchgear. It is mainly suitable for interlocking the front and rear cabinet doors, isolating switches, circuit breakers, grounding wires and other parts that need to be locked in indoor high-voltage switchgear to prevent misoperation. It is an indispensable locking device for power generation and supply departments. In addition, to meet the needs of integrated automation substations, this series of electromagnetic locks also adds auxiliary contacts inside the lock. It can provide users with a pair of corresponding switch contacts at the opening and closing positions of the lock, facilitating mutual interlocking and comprehensive automated sampling of the lock, avoiding empty spaces, and is an ideal locking device for modern substation equipment. The "electric control lock" product of Zhuanli solves the defect of mechanical program lock keys in comprehensive automation substations that cannot be controlled and managed.