| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide the insulated switchgear of environmental harmonic type without using global warming tendency gas for attaining tendency of the switch gear miniaturizing it/weight reduction. <P>SOLUTION: A vacuum circuit breaker 1 is applied to the insulated switchgear, mixed gas or dry air with a principal component of N<SB>2</SB>and O<SB>2</SB>is used for insulating gas, the lowest warranty gas pressure or rated gas pressure is set to 0.2 to 0.8 MPa×abs. A lengthwise direction of the vacuum circuit breaker 1, and the lengthwise direction of the insulated switch gear, except an operating unit 3 or the like are arranged in a manner substantially in parallel to make a tendency to miniaturize the switchgear. A cylindrical pressure vessel 2 of the gas section of the vacuum circuit breaker 1 and cylindrical pressure vessels 7a, 7b of a gas interval of dis-connectors 5a, 5b are gas partitioned by spacers 6, a gas pressure of the cylindrical pressure vessel 2 is decreased lower than the gas pressure of the dis-connector 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
