| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a gas-insulated switching device capable of preventing breakdown between metal containers due to induction surge by an inexpensive insulating structure between the metal containers. <P>SOLUTION: In the gas insulated switching device 30 in which an adaptor 4 and an insulating spacer 5 are pinched between flanges 6, 7 to constitute an insulating connection between the metal containers 15, 16, a screw part of an aerial discharging bolt 1 with a projection is screwed into a screw hole 26 formed in the flange 7 by being inserted into the adaptor 4 and the insulating spacer 5 from a bottom face of a counterbore 23 formed in the adaptor 4, thereby fastening the flange 7 and the adaptor 4 through the insulating spacer 5. Furthermore, an aerial gap 14 is provided between a projection part 22 of the aerial discharging bolt 1 with the projection and the flange 6, and the length of this aerial gap 14 is adjusted so that its dielectric strength becomes smaller than those of the insulating spacer 5 and an insulating washer 2. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
