Switchgear and opening and closing method thereof

A switchgear, comprising:

• a plurality of switch units each having a fixed electrode and a movable electrode disposed to be opposed to the fixed electrode, the movable electrode being closed or opened with respect to the fixed electrode;
• an operating device configured to operate the movable electrode being closed or opened with respect to the fixed electrode of each of the switch units;
• and a conductor configured to electrically connect the switch units to each other,
• wherein the switchgear is provided with a Geneva drive in which the operating device is configured of one motive part and two follower parts, the motive part having a movable pin that rotates with the motive part, and each of the two follower parts has a guide slit with which the movable pin of the motive part is to engage, and the movable pin engages with the guide slit of one of the follower parts along with rotation of the motive part, and when the movable pin is disengaged from the guide slit, the movable pin engages with a guide slit of the other of the follower parts, thereby the switch units are driven while a time delay is produced.

An opening and closing method of a switchgear, comprising a plurality of switch units that each include a fixed electrode and a movable electrode disposed opposite to the fixed electrode, the movable electrode being closed or opened with respect to the fixed electrode, a conductor configured to electrically connect the switch units to each other, an operating device configured of one motive gear and two follower gears that intermittently operate with each other, wherein the motive gear has cogs around a portion of the circumference of the motive gear and each of the two follower gears has cogs around a portion of the circumference of the follower gear, the method comprising:

• driving the motive gear by power of a motor transmitted via a power transmission mechanism;
• transmitting a drive force of the motive gear to a follower gear through engagement of the cogs of the motive gear with the cogs of a follower gear,
• transmitting the drive force transmitted to each of the follower gears to the respective movable electrodes via respective operating rods, which are connected to each of the respective follower gears,
• maintaining in a fixed position a state of a follower part,
• rotating the motive gear from an initial position to a final position, and during the rotation the cogs of one of the two follower gears engages with the cogs of the motive gear, and the cogs of the other of the two follower gears engages with the cogs of the motive gear asynchronously with respect to the engagement of the cogs of the one following gear.