| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily display and reset the cut-off condition by comprising an operation confirming bar which is projected from a confirmation window formed on a cover of a case in accompany with the rotation of a motor to display the cut-off condition of a breaker. SOLUTION: A rack 7 is moved in a vertical direction along a rack guide 7a when a motor 5 is rotated. The rack 7 comprises an operation confirming lever 9 in a vertical moving direction and an insulating plate 8 in a direction perpendicular to the vertical moving direction, a point of an operation confirming bar 9 is projected from an operation confirmation window 12 formed on the cover 2 when a cutoff circuit is in the cut-off condition, and the insulating plate 8 is inserted between a bus bar with contact point 4c and a bus bar 4a which form the cutoff circuit to cut off a power source. In the current carrying condition where the rack 7 is moved downward, the bus bar with contact point 4c and the bus bar 4a are kept into contact with each other, and in the cut-off condition, the insulating plate 8 is inserted between the bus bar with contact point 4c and the bus bar 4a to release the contact of the contact point and the bus bar 4a.</p> |
