Abstract: An actuator comprising: a disconnecting switch drive shaft; a first drive gear axially coupled to the drive shaft; a first follower gear in engagement with the first drive gear; a first drive disc having a first drive roller; a first rotary shaft axially supporting the first follower gear and the first drive disc; an earthing switch drive shaft; a second drive gear axially coupled to the earthing switch drive shaft; a second follower gear in engagement with the second drive gear; a second drive disc having a second drive roller; a second rotary shaft; a zeneva disc having a pair of groove portions which the first drive roller or the second drive roller is inserted into or separated from; and a main shaft for switching the disconnecting switch or the earthing switch in accordance with the rotation of the zeneva disc.

Abstract: Disclosed is an electrode for a vacuum interrupter, capable of reducing damage of contacts due to heat concentration to the center of the contacts, by reducing magnetic flux concentration to the center of the electrode, and capable of rapidly extinguishing an arc by diffusing the arc by forming a wide range of magnetic flux.

Abstract: Disclosed is a spring actuator for a circuit breaker, the spring actuator comprises a spring configured to provide an elastic energy serving to perform a circuit opening operation or a circuit closing operation of a circuit breaker; a spring housing providing a space to compress or extend the spring; a movable supporting plate linearly movable in the spring housing; a linearly-movable shaft linearly-movable having a first position for charging an elastic energy by compressing the spring, and having a second position for releasing the spring; a driving mechanism configured to provide a rotatory power for linearly-moving the linearly-movable shaft; one rigid link configured to convert the rotatory power provided from the driving mechanism to a linear power and to transmit the linear power to the linearly-movable shaft; and a latch mechanism having a position for latching the spring such that the spring maintains a charged state.

Abstract: Disclosed is an electrode for a vacuum interrupter, capable of reducing damage of contacts due to heat concentration to the center of the contacts, by reducing magnetic flux concentration to the center of the electrode, and capable of rapidly extinguishing an arc by diffusing the arc by forming a wide range of magnetic flux.

Abstract: An electromagnetic linear actuator is disclosed that is capable of providing a large driving force adequately used for a high-voltage circuit breaker due to simplified structure and reduced manufacturing cost, the actuator comprising: stators each facing the other about an axle; a mover disposed with a moving core and a moving coil wrapping the moving core to magnetize the moving core during conduction, and capable of linearly and axially moving an interior of the stator; and permanent magnets, one facing the other, and fixedly mounted on both inner walls of the stator for providing a Lorentz force and reluctance force to the moving coil for movement when a current flows in the moving coil of the mover, and for providing a holding force to the mover for holding a position when the electric conduction to the moving coil of the mover is interrupted.