A vacuum circuit breaker includes a grounded tank in which an insulating gas is sealed, a vacuum valve, a movable-side electrode, a fixed-side electrode, a bellows fixed to the movable-side electrode allowed to pass therethrough, to expand and contract in the vacuum valve, a pressure valve regulating gas pressure between a first area enclosed by the bellows and a movable-side frame and a second area enclosed by the grounded tank outside the first area, a pressure release valve releasing the insulating gas from the first area to the outside of the grounded tank, and an anomaly determination unit determining leak of the insulating gas from the grounded tank, based on a gas pressure in the second area measured by a pressure sensor.

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.

The present disclosure relates to a vacuum interrupter that is installed within a vacuum circuit breaker to break a circuit. The vacuum interrupter includes an insulated container, a seal cup, a fixing electrode, a diaphragm, and a movable electrode. The insulated container is formed in a cylindrical form. The seal cup is installed on an upper end of the insulated container. The fixing electrode includes a fixing shaft and a fixing contact member installed on the other end of the fixing shaft. The diaphragm is installed on a lower end of the insulated container. The movable electrode includes a movable shaft having one end fixed to the diaphragm and the other end disposed within the insulated container and formed to be linearly movable, and a movable contact member installed on the other end of the movable shaft to be selectively contacted to the fixing contact member.

In case of using multi-contacts or flat braided wires for constituting a current carrying structure of a movable part in a vacuum relay, problems tend to appear, which are enlargement of a control mechanism, complication, increased operation force and the like. The vacuum relay 1 includes an insulating cylinder 2, a first relay connecting portion 4 that is connected to one open end of the insulating cylinder 2 and has on its inner surface a first contact 3, a second relay connecting portion 5 that is arranged in the insulating cylinder 2 to face the first relay connecting portion 4, a movable member 7 that is movably arranged between the first and second relay connecting portions 4 and 5 and has a second contact that is brought into contact with the first contact when the movable member is moved toward the first relay connecting portion, and a control mechanism 8 that moves the movable member 7 in both directions to establish and break the contact between the two contacts. Between the movable member 7 and the second relay connecting portion 5, there is provided a bellows 11 through which the movable member 7 and the second relay connecting portion 5 are electrically connected.

A vacuum interrupter includes: one movable contact fixed on a movable contact stem; and one fixed contact with a fixed contact stem. The fixed contact and the movable contact are located in a electrically insulating tube, which is vacuumtightly closed by metal lids at boths sides. The fixed contact stem is placed vacuumtightly on one of the metal lids, and the movable contact stem is guided trough an opening of the opposite metal lid via an axially extendable vacuumtight bellow. In order to create a twist protection of the movable contact stem, a ring disc shaped plastic part with a central opening, through which the movable contact stem is guided, is connected externally to the vacuum interrupter such that inner spanner flats inside the opening complementarily fit closely to external spanner flats of the movable contact stem.

A medium voltage circuit breaker for the use in high pressure environments has a vacuum interrupter with a fixed contact side and a movable contract side with a movable rod, and a drive in pressure tight insulating housing, electrical terminals to the vacuum interrupter integrated into the pressure housing, and a further pressure tight housing attached pressure tightly at the insulating housing at the movable contact side of the vacuum interrupter with the movable rod, and that the inner volume of the insulating pressure tight housing gastightly separated from the inner volume of the further pressure tight housing by a bellows, through which the movable rod is guided through and mechanically coupled to a drive, which is arranged inside the further housing.

The present disclosure relates to a vacuum interrupter that is installed within a vacuum circuit breaker to break a circuit. The vacuum interrupter includes an insulated container, a seal cup, a fixing electrode, a diaphragm, and a movable electrode. The insulated container is formed in a cylindrical form. The seal cup is installed on an upper end of the insulated container. The fixing electrode includes a fixing shaft and a fixing contact member installed on the other end of the fixing shaft. The diaphragm is installed on a lower end of the insulated container. The movable electrode includes a movable shaft having one end fixed to the diaphragm and the other end disposed within the insulated container and formed to be linearly movable, and a movable contact member installed on the other end of the movable shaft to be selectively contacted to the fixing contact member.

A vacuum interrupter including a vacuum bottle, a fixed contact extending through one end of the vacuum bottle and a movable contact positioned within the vacuum bottle relative to the fixed contact so that a gap is defined between the fixed contact and the movable contact when the vacuum interrupter is open and the fixed contact and the movable contact are in contact with each other when the vacuum interrupter is closed. An insulated drive rod is rigidly coupled to the movable contact opposite to the fixed contact and a circular flexible conductor is coupled to the movable contact and flexes when the movable contact is moved by the drive rod. The flexible conductor can be, for example, a laminate structure including a plurality of stacked conductive laminates each having a plurality of spirals separated by gaps or a linear spring trampoline conductor.

A coupling bellows includes a first bellows and a second bellows having a higher spring constant than the first bellows. A coupling member is joined to each of the first bellows and the second bellows adjacent to each other, and includes a hole inserted with a movable shaft. A pressing member moves in an axial direction of the movable shaft toward the coupling member along with movement of the movable shaft in the direction in which a movable contactor is separated from a fixed contactor, and presses the coupling member, thereby contracting the second bellows.

A vacuum switch device has a housing, at one end of which a fixed contact is arranged; a bellows, which is fastened on one side to a flange at the other end of the housing and on the other side to a moving contact; and a guide bearing for the moving contact. The bearing is fastened to the flange and guides the moving contact in a sliding manner. The guide bearing is secured on the flange by an adhesive layer. There is also described a method for producing a vacuum switch device.