Switchgear operating mechanism

A switchgear operating mechanism which operates a movable shaft extending from a movable electrode of a switchgear to thereby bring the movable electrode into contact or out of contact with a fixed electrode, comprising:

• an electromagnetic rebound mechanism unit;
• a magnetic latch unit;
• and
• a spring drive unit,
• wherein the electromagnetic rebound mechanism unit and the magnetic latch unit are fixedly installed between the switchgear and the spring drive unit by virtue of a fixing member,
• the electromagnetic rebound mechanism unit includes a rebound coil fixedly secured to the fixing member, a reinforcing plate fixedly secured to the movable shaft and a rebound ring fixedly secured to the reinforcing plate,
• the magnetic latch unit includes a permanent magnet fixedly secured to the fixing member, a latch ring fixedly secured to the permanent magnet and a movable yoke fixedly secured on the movable shaft, and
• the spring drive unit includes a support frame fixedly installed on the fixing member, a spring retaining plate fixedly secured to an end portion of the movable shaft, a circuit-opening spring disposed between the spring retaining plate and the support frame so as to surround the movable shaft, a damper unit fixedly installed on the support frame and an electromagnetic solenoid fixedly installed on the support frame.