A manipulator according to an embodiment may comprise: a housing; a rotary unit which is disposed in the housing and has a first rotating shaft; and a linear unit at least a part of which is disposed in the housing and which performs linear motion with respect to a breaker, wherein one side of the linear unit may be connected to the breaker and the other side of the linear unit may be connected to a part of the rotary unit.

A particle extraction system for an electrical interrupter is disclosed in the present application. The particle extraction system includes a support bay configured to hold an electrical interrupter in position during a particle extraction event. An actuator system is operable for cycling the interrupter to dislodge and release foreign particles internal to the interrupter. A fluid source and pumping system is in fluid communication with at least one internal flowpath within the interrupter to entrain and transport the released particle from the interrupter. A vacuum slot is operable for receiving a fluid flow with entrained particles and transporting the particles to a particle capture device.

A particle extraction system for an electrical interrupter is disclosed in the present application. The particle extraction system includes a support bay configured to hold an electrical interrupter in position during a particle extraction event. An actuator system is operable for cycling the interrupter to dislodge and release foreign particles internal to the interrupter. A fluid source and pumping system is in fluid communication with at least one internal flowpath within the interrupter to entrain and transport the released particle from the interrupter. A vacuum slot is operable for receiving a fluid flow with entrained particles and transporting the particles to a particle capture device.

A switchgear driving device has a rod coupled to a movable electrode; an operation piston connected to the rod; and an operation cylinder in which an operation piston slides. A main control valve controls the pressure of the hydraulic oil in the operation cylinder. A turning-on pressure accumulation piston slides inside a turning-on pressure accumulation chamber; and a turning-on pressure accumulation spring imparts a driving force to the turning-on pressure accumulation piston to pressurize the hydraulic oil within the turning-on pressure accumulation chamber. A turning-off pressure accumulation piston slides inside a turning-off pressure accumulation chamber. A turning-off pressure accumulation spring imparts a driving force to the turning-off pressure accumulation piston to pressurize the hydraulic oil in the turning-off pressure accumulation chamber. A spring case accommodates the turning-on pressure accumulation spring and the turning-off pressure accumulation spring, wherein the turning-off pressure accumulation spring is arranged inside the turning-on pressure accumulation spring.

A high-voltage circuit breaker comprises a first main contact and a second main contact extending along a central longitudinal axis and being at least partially enclosed by an insulator, wherein the insulator has an inner surface facing the central longitudinal axis and being arranged at a first distance from the central longitudinal axis, and further comprises at least one particle trap for trapping particles generated during operation of the circuit breaker, wherein the particle trap has an inner surface facing the central longitudinal axis and being arranged at a second distance from the central longitudinal axis, the second distance being larger than the first distance.

A piston rod (15) and a first piston (13) are arranged in the interior of an external cylinder (11) and internal cylinder (12); a second piston for absorbing the change of volume of operating fluid (24) is also arranged therein. Also, a first return spring (18) for returning the piston rod (15) to the interruption position is provided and a second return spring (20) for returning the operating fluid 24 into the high-pressure chamber (25) by pressurizing the second piston (14) is provided. In addition, the air in the interior of the buffering device (10) is withdrawn by a vacuum pump (38), and operating fluid (24) is thus introduced in a degassed condition.