Gas-insulated switching apparatus

摘要

A gas-insulated switching apparatus in which insulation is attained by air is provided. A gas-insulated switching apparatus that can be made even smaller than conventional ones is also provided. In the gas-insulated switching apparatus, dry pressurized air is sealed as an insulation gas. The dry pressurized air has a pressure of 0.11 to 0.3 MPa and a water content that is no more than 3,000 ppm in terms of a volume ratio of a volume of water vapor in which a vapor partial pressure of the dry pressurized air is converted to be 101,325 Pa.