| 摘要 |
Provided is a switchgear operating mechanism which is capable of reducing the weight of a movable unit of the operating mechanism, reducing the electric energy required in driving the movable unit, obtaining a high response and a high speed with a relatively long stroke, reducing the impulsive force generated when stopping a circuit-opening operation, and enjoying high reliability. An electromagnetic rebound mechanism unit 10 and a magnetic latch unit 20 are fixedly installed between a switchgear 1 and a spring drive unit 30 by virtue of a rebound fixing member 11 and a fixing yoke 21. The electromagnetic rebound mechanism unit 10 includes a rebound coil 12 fixedly secured to the rebound fixing member 11, a reinforcing plate 14 fixedly secured to a movable shaft 5 and a rebound ring fixedly secured to the reinforcing plate 14. The magnetic latch unit 20 includes a permanent magnet 22 fixedly secured to the rebound fixing member 11, a latch ring 23 fixedly secured to the permanent magnet 22 and a movable yoke 24 fixedly secured to the movable shaft. The spring drive unit 30 includes a support frame 31, a spring retaining plate 32, a circuit-opening spring 33, a damper unit 40, and first and second electromagnetic solenoids 50 and 60. |
