| 摘要 |
An insulation rod cover (38) is fitted onto the end portion of a puffer shaft (32), and by fitting the insulation rod cover (38) onto a breaker unit-side connecting pin (33) which links the puffer shaft (32) and the insulation rod (34), the insulation rod cover (38) is held on to a linking unit linking the puffer shaft (32) and the insulation rod (34). During the first half of the breaker operation, the insulation rod cover (38) is positioned inside of an exhaust tube (28), preventing discharge of hot exhaust gas from the puffer shaft (32) and increasing the pressure of the arc extinguishing gas blown onto an arc. During the second half of the breaker operation, the insulation rod cover (38) is position inside of a guard tube (29), promoting discharge of the hot exhaust gas from the puffer shaft (32) and suppressing inflow of the hot gas into an insulation cylinder (27). |
