| 摘要 |
PURPOSE: A lock device of a circuit breaker is provided to prevent previously an accident due to electric shock by interrupting an operation of the circuit breaker by means of a handle in a locking state. CONSTITUTION: A circuit breaker includes a case(1), a cover(2), a fixing contactor(3), a moving contactor(4), a switching unit portion, a detection unit portion(6), an arc extinguishing portion(7), a trip button, and a crossbar(16). A cam(24) and a base(25) are installed within the case(1). The cam(24) is rotated by the rotation of a key(21). The base(25) is linearly moved when the cam(24) is rotated by the rotation of the key(21). The base(25) is located at one side of the crossbar(16) in order to lock the crossbar by the movement of the base(25) when the key(21) is rotated to a locking state. A wing section(25a) is formed at the base(25) in order to be connected to the crossbar(16).
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