| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a switchgear in which abrasive exfoliation of silver plating applied to the ground disconnection section movable electrode and each fixed electrode in contact with the spring contactor thereof does not take place even for high frequency switching operation, a stabilized low contact resistance can be maintained, and the temperature does not rise at the contact part. <P>SOLUTION: The switchgear comprises a ground disconnection section disposed in a gas and can be switched between a disconnection position and a ground position by moving linearly, and a vacuum valve connected electrically with the ground disconnection section and closing and opening a current in the vacuum in a vacuum container. The ground disconnection section and the vacuum valve are covered integrally with a solid insulator, and ring-shaped spring contactors are installed on both axial end faces of the movable electrode in the ground disconnection section. When the ground disconnection section is in closed state or the grounded state, the spring contactors are brought into conduction by applying a contact load by means of a bi-directional wipe mechanism. <P>COPYRIGHT: (C)2013,JPO&INPIT |
