A gas-insulated switching device includes: a vacuum valve having a movable contact provided on one side of a movable conductor and a fixed contact provided to a fixed conductor; an insulation rod connected to another side of the movable conductor led out from the vacuum valve through a bellows; an operation rod connecting the insulation rod and an operation device; an airtight container in which the insulation rod, the other side of the movable conductor, and the operation rod are accommodated; and an intermediate pressure chamber formed by communication between internal spaces of the bellows and the airtight container. A sliding contact member is provided to the other side of the movable conductor. The sliding contact member is connected, via the airtight container, to a main circuit conductor. A communication portion provided between the airtight container and the sliding contact member allows communication inside the airtight container.

A switchgear driving arrangement includes a transmission element which penetrates a wall of a housing. The transmission element is guided in a linearly movable manner in such a way as to be supported on the wall. A first guide bearing is located inside the housing. A second guide bearing is located outside the housing. An electrical switchgear is also provided.

A circuit breaker includes at least one moveable contact. The moveable electrode is operably connected to a Thomson coil actuator that can separate and open the contacts of the circuit breaker. A sensor senses current or voltage in the circuit breaker. When a condition exists that triggers an opening action, a controller will use select a current level to apply to the Thomson coil actuator. The selected current level will vary based on the sensed current or voltage level. The controller will cause a driver to apply the selected current level to the Thomson coil actuator, and it will cause the contacts to separate and open. If the circuit breaker is a vacuum interrupter, the vacuum interrupter may employ a multi-section bellows in which each section has unique structural characteristics as compared to the other sections, so that different sections will dominate as the Thomson coil's speed of operation varies.

An arc shield surrounding an outer peripheral side of a fixed electrode and a movable electrode is provided, in addition to a fixed-side insulating unit in which a fixed-side insulator is provided to be connected coaxially with the arc shield on the fixed side in the axial direction of the arc shield, and a movable-side insulating unit in which movable-side insulators are provided to be connected coaxially with the arc shield on the movable side in the axial direction of the arc shield. The movable-side insulating unit has an insulator group in which movable-side insulators are provided to be connected in the axial direction, an insulator-group-side sub shield surrounding the outer peripheral side of a movable-side energizing shaft, and an insulator-group-side sub shield support part which is on the outer peripheral surface of the insulator-group-side sub shield and interposed between two adjacent movable-side insulators of the insulator group.

An electrical switchgear has a first switching contact piece and a second switching contact piece. The two switching contact pieces can be moved relative to one another by way of a kinematic chain. The kinematic chain has an axially movable drive element, which is guided in a guide element. A first pin is guided in a first gate and defines the trajectory of the drive element in the guide element.

A control rod system has a control or drive rod and at least one compensation element for vacuum interrupters, in particular for gas-insulated switchgear. The at least one compensation element has at least one hermetically sealed bellows. The at least one hermetically sealed bellows is either connected to the drive rod at at least one point, or is connected to or can be coupled to the drive rod via at least one engagement device and the engagement device is connected or can be connected to the at least one compensation element in a fixed or engaging manner.

A vacuum interrupter having a structure to trap running cathode tracks is disclosed. The interrupter includes a first electrode assembly and a second electrode assembly, at least one of which is moveable. The interrupter also includes a sidewall having a longitudinal axis. One or more trench structures are formed in at least one of the electrode assemblies. Each trench structure has an opening that faces the other electrode assembly in a direction that is parallel to the longitudinal axis, to trap the running cathode tracks to prevent them from getting close to the sidewall.

A gas insulated switchgear includes: a gas-tight housing; at least one shaft extending through an opening in the gas-tight housing, which shaft is partially rotatable and/or translatable; a sealing means arranged in the opening for sealing the shaft relative to the gas-tight housing, the sealing means including a sealing bellows having a first mounting rim on one axial end, a second mounting rim on an other axial end, and a bellow body in between the first and second mounting rims; and a mounting ring mounted coaxially to the shaft. The sealing bellows is arranged around the shaft, with the first mounting rim to the housing and with the second mounting rim to the mounting ring.

A gas-insulated switching device including, inside a pressure tank: a vacuum valve having a movable contact provided on one side of a movable conductor, and a fixed contact provided to a fixed conductor; an insulation rod connected to another side of the movable conductor led out through a bellows from the vacuum valve; and an airtight container in which the insulation rod and the other side of the movable conductor are stored, wherein an internal space of the bellows and an internal space of the airtight container communicate with each other, one side of the vacuum valve is fixed to a tank wall via an insulation support body, another side of the vacuum valve is connected to the tank wall via the airtight container, and the airtight container insulates the vacuum valve and the tank wall from each other, and is slidable in a movable direction of the movable conductor.

A gas-insulated switching device including, inside a pressure tank: a vacuum valve having a movable contact provided on one side of a movable conductor, and a fixed contact provided to a fixed conductor; an insulation rod connected to another side of the movable conductor led out through a bellows from the vacuum valve; and an airtight container in which the insulation rod and the other side of the movable conductor are stored, wherein an internal space of the bellows and an internal space of the airtight container communicate with each other, one side of the vacuum valve is fixed to a tank wall via an insulation support body, another side of the vacuum valve is connected to the tank wall via the airtight container, and the airtight container insulates the vacuum valve and the tank wall from each other, and is slidable in a movable direction of the movable conductor.