| 摘要 |
PROBLEM TO BE SOLVED: To obtain a circuit breaker which, when a large current such as a short circuit current flows, breaks rapidly the movable contactor by the suction force generated by this current and does not restrike the current. SOLUTION: The circuit breaker comprises an arc commutation conductor 11 which is located near the rear face of a separated movable contactor 4 and is installed between a pair of arc extinguishing chambers 8 so that the current by arc may be commutated, and a yoke 12 of which magnetic pole face is formed at the opening end of U-shape and which is installed on the arc commutation conductor 11 so that it may be magnetized by the current flowing in the arc commutation conductor 11. When the movable contactor 4 is separated from the fixed contactors 1, 2, the yoke 12 is magnetized by the current flowing in the arc commutation conductor 11 and the movable contactor 4 is sucked to its magnetic pole face 12a. COPYRIGHT: (C)2005,JPO&NCIPI
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