Lead uncapping breaker device

The utility model discloses an advanced uncapping current-failure device which comprises a electric equipment cover board (1), a bolt cover with a lock (2), a key (3), a lock core (4), a bolt (5), a spring pad (6), a distance sleeve (7), an action sensor rod (8), an action sensor (9), a safeguard monitor (10) and a closedown bolt (11), wherein, the bolt (5) is connected with the electric equipment cover board (1); the key (3) and the lock core (4) are arranged in a hole at one side of the bolt cover with a lock (2), and the action sensor (9) is arranged in a hole at the upper part of the bolt cover with a lock (2); the bolt cover with a lock (2) is fixed on the distance sleeve (7) of the bolt (5) through the lock core (4) and is contacted with the bolt (5) through the action sensor (9); the action sensor (9) is communicated with the safeguard monitor (10). By using the utility model, only the full-time electricity personnel can unscrew the screw of the electric equipment cover board, and the utility model sends out a signal to the safeguard monitor before unscrewing and cuts off the power supply to send out caution, thereby realizing the advanced uncapping current-failure, and ensuring the security of the maintenance personnel.