| 摘要 |
PROBLEM TO BE SOLVED: To provide a switchboard that prevents the incorrect wiring of a load by the difference in the order of phases in a double-sided switchboard in which a bus is used in common in the unit-device accommodating rooms at both front and back sides of the switchboard. SOLUTION: At the central part inside the switchboard 2, buses 5 consisting of main buses 3 and auxiliary buses 4 of three phases are mounted. Unit-device accommodating rooms 8 are provided at the front and back sides of the board 2 so that the buses 5 can be used in common by the rooms 8 at both sides. A load-side disconnecting switch 12 is provided in each chamber 8, and load wire connecting terminals 21 and a code plate 25 are mounted on the disconnecting switch 12. Letters representing the order of the phases of the terminals 21 are shown on the code plate 25. This structure makes it possible to prevent wrong connections caused by the difference in the order of the phases because the order of the phases is indicated by letters on the code plate 25 even if the order of the phases differs between the front and back sides of the board 2 when load wires provided on loads are connected to the connecting terminals 21 of the unit devices 7 accommodated in the rooms 8. |
