ELECTRIC CURRENT SWITCHING DEVICE

摘要

Provided is an electric current switching device comprising: a blade type movable contact (26) extending in a radial direction from a center of rotation (P) and having a reciprocating action such that the free end traces a swinging path (L); a stationary contact (20) alternately in the proximity of and away from the movable contact (26) and having current-carrying members (31) disposed so as to sandwich the rotating surface of the movable contact (26) and face each other substantially parallel on both sides thereof and an external frame (45) covering at least the periphery of the current-carrying members (31); a movable arc contact (1) provided on the movable contact (26); a stationary arc contact (2) provided on the stationary contact (20); and permanent magnets (3a, 3b) disposed in the stationary contact (20) or the movable contact (26) so as to generate a magnetic field that crosses an arc (4) generated between the movable arc contact (1) and the stationary arc contact (2).