| 摘要 |
<p>PURPOSE:To reduce the size of a switch device using gas insulation. CONSTITUTION:Openings 15, 17 are provided in that part of a boat form insulated object to be supported 7 which confronts metal flanges 11, 13 at the top and bottom of a vacuum valve 9, and thereby the inter-phase insulating performance under gas insulation is made dependent upon the voltage withstand performance of the vacuum valve high-voltage charging part relative to one another. Thereby the voltage withstand performance of inter-phase insulation can be enhanced more than in the case where insulation is interposed.</p> |
