| 摘要 |
PROBLEM TO BE SOLVED: To prevent the overlapped driving of two or more equipment to be controlled by a preventing circuit by selecting and driving one arbitrary equipment to be controlled among plural equipment to be controlled, and to improve reliability by simplifying the preventing circuit, and reducing the number of parts in a compact constitution. SOLUTION: When a push button switch 1 for selection is turned on, a selection relay 11 is operated, and when a contact 1b is turned off, other selection relays will not be operated. When a push button switch 4 for control is turned on in this state, a control relay 14 is operated, and equipment 1 to be controlled such as a circuit interrupter is driven (inputted). When the push button switch 4 for control is turned off, the equipment 1 to be controlled is turned off. Then, the push button switch 1 for selection is turned off, and the selection relay 11 is turned off, an initial state is restored so that any selection relay can be made selectable. Thus, it is possible to realize a simple circuit by preventing any other selection relay from being operated by the (b) contact of the push button switch for selection.
|
