| 摘要 |
PROBLEM TO BE SOLVED: To implement downsizing as well as ensuring safety of a circuit and reliability of cutoff performance by using electromagnetic force generated by magnetic flux density generated by a current path and current of an arc itself.SOLUTION: A movable contactor 6 and a fixed contactor 4 are formed and arranged so as to comprise: a fixed electrification contact 4d and a movable electrification contact 6d opposite to each other so as to be separated and apart from each other; a movable arc contact 6b and a fixed arc contact 4a that are together connected to the fixed electrification contact 4d and the movable electrification contact 6d when rated current flows, and are separated and apart from each other belatedly after the fixed electrification contact 4d and the movable electrification contact 6d are separated and apart from each other; and a movable arc current conductor 6c and a fixed arc current conductor 4b that are formed so that their cross sectional area is smaller than those of contact surfaces of the fixed electrification contact 4d and the movable electrification contact 6d, and are arranged so as to be vertical to the arc and have current directions inverse to each other. The movable contactor 6 and the fixed contactor 4 are also formed and arranged so that the movable arc current conductor 6c and the movable arc contact 6b are accommodated in a recess part of a fixed conductor 4e, in a closed electrode state. |
