| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve a sealed gas-insulated switchgear so that high reliability can be secured by reducing cost by simplifying a constitution of the sealed gas-insulated switchgear and also by providing a maintenance-free system thereto. <P>SOLUTION: In the sealed gas-insulated switchgear, a switching apparatus of a main circuit is housed in a sealed vessel 2; and phases of the switching apparatus, isolating poles, and the switchgear and the ground are insulated by filling insulation gas into the sealed vessel. In the sealed gas-insulated switchgear, a drawing type disconnector 10 equipped with a disconnector body, an operating part and an isolating part contactor 10b is employed to a moving bogie 10a as the switching apparatus of the main circuit, and the drawing type disconnector is arranged in the sealed vessel while linking to a movement operation mechanism 13 that moves to an operating position and an isolating position by the operation of a handle 13b from the outside of the vessel. Low-temperature dry air or a nitrogen gas is filled into the sealed vessel as the insulation gas by being set to almost the same in air pressure as the atmospheric air . <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
