| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the number of the parts of a grounding switch and to enhance its assembling workability. SOLUTION: A grounding switch 22 is constituted between a gas circuit breaker 21 and a crank case 32. Insulating spacers 27 are provided in the crank case 32, and embedded connectors 37 make movable-side electrodes 38 in a container 33 and grounding electrodes 44 are set outside the container. The movable-side electrodes 38 are inserted loosely into cylindrical movable contacts 25, and each movable contact 25 is loosely fitted to a fitting board 24. A stationary-side electrode 26 of the grounding switch 22 is fitted to the circuit breaker. At on-off operation of the grounding switch 22, the movable contacts 25 move guide by the movable-side electrodes 38 and make contact with or separate from the stationary-side electrodes 26. This enables the breaker to reduce the number of parts and to simplify assembling work, since the embedded conductors of the insulating spacers 27 are used for movable-side electrodes 38, as well as for grounding electrodes 44.</p> |
