| 摘要 |
PROBLEM TO BE SOLVED: To provide a voltage changer, which prevents a screw and a cylindrical conductor element and a female threaded member from easily moving in a long hole, when the screw is moved above the long hole and the tip of a screw driver is separated from the screw, makes positioning accurate on the occasion of driving the screw, prevents the cylindrical conductor element and the female threaded member from touching a U-shaped cutout portion halfway, and makes contact by complete screwing. SOLUTION: This kind of voltage changer changes a the supply voltage to each branch breaker over to another voltage, by changing conductor phase to be connected to one pole of the branch breaker over to a neutral phase and a voltage phase of a single-phase three-wire distribution board which contains a main breaker, a plurality of two-pole branch breakers, and a conductor apparatus for connecting the main breaker and the two-pole branch breakers electrically; and the voltage changer contains a feed board, which is connected to the terminal of one pole of each branch breaker an has a long hole, conductors of the neutral phase and the voltage phases, a cylindrical conductor element, and a screw which penetrates the long hole of the feed board and the cylindrical conductor element, and connects the cylindrical conductor element to the connection of the conductor of the neutral phase or a voltage phase selectively. In the changer, a hindrance portion, which can be gone over in a loosened state of the screw, is formed at an approximately central part of the long hole of the feed board. |
