To provide a circuit breaker in which an arc generated between a fixed contact and the movable contact element of a movable contact maintains the movable contact element in open pole state after commutation to suppress restrike phenomenon when the main circuit is interrupted.
A movable contact 5 provided in a movable contact element 6 supported rotatably by a movable element holder 9 is separated from a fixed contact 3, the movable contact element 6 performs rotational movement, and maintains the open pole state by an electromagnetic repulsion force at a position where the direction of a current flowing through the flexible conductor 15 of a commutation traveling conductor 14 is opposite from the direction of a current flowing to the other end 6b side of the movable contact element thus suppressing restrike.
MINODA KYOHEI
WATANABE SHINYA
Masuo Oiwa
Toshihide Kodama
Takenaka Ikuo