| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a circuit breaker in which commutation of an arc is facilitated and cutoff performance can be enhanced. <P>SOLUTION: Arc runners 39a and 39b are composed of a high resistance member having a higher volume resistivity than those of fixed contact 33 and 34 and a movable contact 35. Permanent magnets 40a and 40b which make an electromagnetic force act so that an arc 41 commutated to the arc runners moves toward an arc-extinguishing device 36 are arranged to face each other on the side surfaces of the arc runners 39a and 39b. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
