Frame-supported circuit breaker having automatic locking function

An air circuit breaker with a self-locking function, comprising an air circuit breaker body, wherein said circuit breaker further comprises:

• an input unit for inputting a locking code and an unlocking code;
• an authentication processing unit for receiving said locking code and said unlocking code from said input unit and outputting a control signal after authenticating;
• and
• a locking unit for receiving said control signal from said authentication processing unit and locking or unlocking said air circuit breaker body;
• wherein said air circuit breaker body comprises:
• a shell,
• wherein an output connecting block and an input connecting block are provided on said shell for connecting external lines, an amount thereof equals to an amount of phase lines, wherein said output connecting block is axially connected to a conducting moving contact block, said output connecting block is electrically connected or disconnected to said input connecting block by swinging said conducting moving contact block;
• and
• a breaking mechanism provided in said shell, comprising:
• a power unit and an action unit;
• wherein,
• said action unit swings said conducting moving contact block when triggered in such a manner that a circuit is opened or closed;
• wherein said power unit provides power for instantly opening or closing said action unit.