INSTANT TRIPPING DEVICE OF CIRCUIT BREAKER

摘要

PROBLEM TO BE SOLVED: To provide a downsized tripping device of a circuit breaker with capable of efficiently using suction force generated. SOLUTION: The tripping device of the circuit breaker carrying out a tripping operation by detecting over-current and acting on a latch of a switching mechanism to open is structured by including a tripping member constituting the latch part with one end held in free turning, and an electromagnetic frame having a movable iron piece absorbing part arranged near a conductor for suctioning and absorbing a movable iron piece with one end held for free turning by magnetic force when the over-current is generated. The tripping member and the movable iron piece are provided with a first contact part each first coming in contact with each other and a second contact part next coming in contact with each other in a moving trajectory in which the moving iron piece turns so as to be absorbed to the movable iron piece absorbing part. COPYRIGHT: (C)2006,JPO&NCIPI