| 摘要 |
PROBLEM TO BE SOLVED: To enable the switching of connection merely with loosening and fastening one screw by arranging a first L-phase switch screw hole face, an N-phase switch screw hole face, and a second L-phase switch screw hole face on roughly the same plane, and paralleling the longitudinal directions of the slots of the connection bars of voltage switches with each other. SOLUTION: To switch the connection of the voltage of a breaker, a switch screw 7 is to be loosened to such an extent that the tip of a screw part 702 comes off a switch screw hole face 202. At that time, the screw 7 is pressed to the U-shaped connection of a conductor by an elastic retainer, so it never easily comes off a switch piece. Moreover, for the switch piece, too, the engaging groove 8022 of the retaining piece 802 engages with a slot face part 600, so it never slips out of the connection bar 6. In that condition, the screw 7 and the switch piece can shift in a sliding manner within the slot 602, so the voltage is switched by picking up the head 701 of the screw 7 between fingers, and shifting it to side of the second L-phase switch screw hole face part 303, the switch piece and all, and fastening the screw 7 over again. |
