| 摘要 |
To provide a gas insulation switch reducing the SF6 gas use amount without damaging the insulation performance and arc extinguishing performance, the present invention uses SF6 gas as insulating gas to be charged in the grounding tank 1 of a unit having a switching unit of the breaker 5, the disconnecting switches 3, 4, and 8, and the grounding switches 6, 7, and 9, for example, the line unit 190 and uses gas having a smaller warming coefficient than that of SF6 gas, for example, nitrogen gas 23, or air as insulating gas to be charged in the grounding tank 1 of a unit having no switching unit, for example, the main bus units 100 and 110 and the connection bus unit 160.
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