The electrical switch includes two fixed contacts and a rotatable knife contact having a rotational axis and including at least one longitudinal pair of blades flexibly connected to each other. The two fixed contacts as well as the blades in the rotatable knife contact are of a first electrically conductive material composition. The first and the second fixed contact includes a first contact pin and outer ends in the blades in the rotatable knife contact includes a second contact pin. The first contact pin and the second contact pin are of a second electrically material composition, which is different from the first material composition. The first contact pin and the second contact pin pass over each other during a switching event.

A gas-insulated puffer-type switch device for operating inside a sealed gas tight enclosure of an electric power distribution switchgear, the sealed gas tight enclosure being filled with a dielectric gas having a global warming potential lower than that of SF6. The switch device has at least one of improved compactness, minimised electrical stress, maximised heat dissipation and reduced environmental impact.

A vacuum circuit breaker capable of efficiently dissipating heat generated in a vacuum valve includes a movable side contact and a fixed side contact which are arranged in the inside of the vacuum valve; a fixed side energization shaft to which the fixed side contact is fixed; a movable side energization shaft to which the movable side contact is fixed; an energization connection portion provided at a position where the movable side energization shaft protrudes from the vacuum valve; and a coupling body provided at the outside tip portion of the movable side energization shaft. The coupling body at the outside tip portion of the movable side energization shaft is coupled to an insulation operating rod.

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.

An electromagnetic relay includes a magnetic attractive member magnetically attractable by an electromagnet unit, and a conductive resilient plate connected to the magnetic attractive member and having a movable portion fixed to the magnetic attractive member, and a movable contact being urged to contact with a first stationary contact. A flexible conductive member is connected to the conductive resilient plate. When the electromagnetic unit is energized and attracts the magnetically attractive member to move the conductive resilient plate therealong, the movable contact contacts with a second stationary contact. When the electromagnetic unit is de-energized, the movable contact contacts with the first stationary contact.

A low voltage contact assembly including a rotating support having a body adapted to rotate around a rotation axis and supporting at least a first couple of movable contacts that can be coupled to/uncoupled from corresponding first fixed contacts by rotation around said rotation axis, the first couple of movable contacts including a first and a second movable contacts housed in the rotating support and each having a corresponding first and second elongated contact body with a contact end protruding from the rotating support, the first and second elongated contact bodies lying parallel to each other in a rotation plane substantially perpendicular to the rotation axis. The low voltage assembly further includes a pressure exerting device having a pressing bar operatively coupled to the first and second elongated contact body and transversally placed with respect to the rotation plane of the first and second elongated contact bodies, and a first and a second elastic elements positioned at opposite ends of the pressing bar, the pressing bar further including a first and a second operating surface each including a corresponding first and second pressing surface protruding from the pressing bar and respectively acting on the first and second elongated contact body.

The electrical switch includes a first and a second fixed contact, and a rotatable knife contact including at least one pair of blades being flexibly connected to each other and rotating around a rotational axis. A third fixed contact is positioned on an opposite side of the rotational axis in relation to the adjacent first and second fixed contact and a middle portion of the rotatable knife contact is electrically connected to the third fixed contact. The rotatable knife contact connects in a first switching position the first fixed contact and in a second switching position the second fixed contact to the third fixed contact.

A high voltage relay resistant to instantaneous high-current impact is disclosed, and includes an electromagnet system, a control system, a contact system, and a base support. In the present solution, an electromagnetic force generated by the contact system is used to resolve a problem of contact separation caused by an electric repulsion force generated by an instantaneous high-current.

A change-over switch including a frame having a first side wall and a second side wall, a first supply terminal, a second supply terminal, a load terminal, and at least one gas flow opening for discharging gasses from the frame. The second side wall faces substantially opposite direction relative to the first side wall. The change-over switch is adapted to selectively provide a first connection between the first supply terminal and the load terminal, and a second connection between the second supply terminal and the load terminal. The first supply terminal and the second supply terminal project from the first side wall, and the load terminal projects from the second side wall. The at least one gas flow opening is formed in the second side wall.

Switch assemblies and switching methods are disclosed. In some embodiments, a switch assembly may include a first blade having a first contact within an enclosed cavity, and a second blade having a second contact within the enclosed cavity. The first and second contacts are operable to make or break contact with one another in response to a magnetic field. The switch assembly may further include a coating formed over each of the first and second contacts, the coating including a titanium layer, a second layer formed over the titanium layer, and a tungsten-copper layer formed over the second layer. In some embodiments, the second layer is copper or molybdenum.