| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tank-shaped vacuum circuit-breaker capable of improving device reliability and compactification by suppressing a pressure difference between the inside and the outside of bellows in a simple structure reducing sealed parts. <P>SOLUTION: A vacuum interrupter 3 is accommodated in a ground tank 1 of each phase where an insulating medium is sealed, a link mechanism 100 for simultaneously driving the vacuum interrupters 3 is accommodated in a link mechanism case 2, and the link mechanism 100 has a main shaft 101, a lever 102 and a link 103. The main shaft 101 is concatenated to a manipulator provided outside of the link mechanism case 2, and a rotary seal part 21 is provided at a position where the main shaft 101 is passed through the link mechanism case 2. Further, an inner circumferential side of bellows 11, the inside of an insulated support cylinder 5 through which an insulating rod 4 is inserted and the inside of the link mechanism case 2 are communicated to each other to form a common gas block. In the common gas block, an insulating gas of intermediate pressure between pressure of the insulating medium in the ground tank 1 and atmospheric pressure is sealed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
