A gas-insulated load break switch and a gas-insulated switchgear having a gas-insulated load break switch. The gas-insulated load-break switch has a housing defining a housing volume for holding an insulation gas at an ambient pressure; a first main contact and a second main contact, the first and second main contacts being movable in relation to each other in the axial direction of the load break switch; a first arcing contact and a second arcing contact, the first and second arcing contacts being movable in relation to each other in an axial direction of the load break switch and defining an arcing region in which an arc is formed during a current breaking operation, wherein the arcing region is located, at least partially, radially inward from the first main contact; a pressurizing system having a pressurizing chamber for pressurizing a quenching gas during the current breaking operation; and a nozzle system arranged and configured to blow the pressurized quenching gas onto the arc formed in the quenching region during the current breaking operation, the nozzle system having a nozzle supply channel for supplying at least one nozzle with the pressurized quenching gas. The first main contact includes at least one pressure release opening formed such as to allow a flow of gas substantially in a radial outward direction, wherein the total area of the at least one pressure release opening is configured such that during a supply of the pressurized quenching gas, a reduction of the flow of gas out of the pressure release opening is suppressed.

A medium or high voltage switch including a moveable contact element and a stationary contact element is described. Therein, a moveable-contact guiding portion of the moveable contact element and a stationary-contact guiding portion of the stationary contact element are shaped for establishing a spherical-bearing-type mechanical connection between each other, thereby aligning a center of the moveable-contact guiding portion with a center of the stationary-contact guiding portion while allowing an angular flexion between the moveable and stationary contact elements. Furthermore, at least one of the stationary-contact guiding portion and the moveable-contact guiding portion is electrically insulating.

A conductor arrangement for a circuit breaker interrupter, the conductor arrangement including: a tubular body conductor including a first metal material, and an at least partly tubular contact conductor including a second metal material; wherein a tubular end portion of the tubular body conductor is mechanically and electrically joined with a tubular end portion of the tubular contact conductor in an circumferential overlap region formed by longitudinally press-fitting one of the tubular body conductor and the tubular contact conductor into the other one of the tubular body conductor and the tubular contact conductor, wherein the outer one of the tubular end portions of the tubular body conductor and the at least partly tubular contact conductor at the overlap region includes copper and the inner one includes aluminum.

An electrical switching device includes a first switching contact piece and a second switching contact piece. The switching contact pieces can be displaced in relation to each other. The first switching contact piece is surrounded by a fluid flow guiding device. An enveloping contour of a flow duct, disposed between the fluid flow guiding device and the first switching contact piece, is greater at its end facing the second switching contact piece than an enveloping contour of the first switching contact piece at its end facing the second switching contact piece.

A switch includes a first contact and a second contact that are placed along an operating shaft and can reciprocate with respect to each other. An end of the second contact opposite to an end thereof on the side of the first contact is housed in a housing space of a housing box. The pressure in the housing space is increased due to an arc generated when the first contact approaches the second contact. The increased in the pressure causes the second contact to move toward the first contact.

A contact piece for a high-voltage circuit breaker includes at least a contact pin and a contact carrier. The contact carrier is configured to mechanically fasten the contact pin in the high-voltage circuit breaker. The contact pin includes a contact shaft. The contact carrier and the contact shaft are formed as a monolithic contact element. A method for producing a contact piece is also provided.

A gas-insulated low- or medium-voltage switch for system voltages within 1 to 52 kV and for up to 2000 A rated current includes first and second contacts being movable in relation to each other along an axis of the switch and defining a quenching region in which an arc is formed during a current breaking operation; and an arc-extinguishing system for extinguishing the arc during the current breaking operation. The arc-extinguishing system may include a pressurization system with a puffer chamber, and a nozzle system connecting the pressurization system with the quenching region, the nozzle system having a nozzle at its outlet for blowing the pressurized quenching gas onto the arc formed in the quenching region during the current breaking operation; and a swirling device configured for generating a subsonic swirl flow of a quenching gas onto the quenching region during the current breaking operation, wherein the swirling device is arranged at an entrance of the nozzle system. The arc-extinguishing system further includes a swirling device configured for generating a subsonic swirl flow of a quenching gas onto the quenching region during the current breaking operation, wherein the swirling device is arranged at an entrance of the nozzle system.

A switch including a housing, a first contact arrangement having a first commutation contact element and a first contact, a second contact arrangement having a second commutation contact element and a second contact, and also a nominal contact arrangement. The first commutation contact element and the second commutation contact element form a snap-action connection with one another in the closed position of the commutation contact element. When the switch is closed, a distance between the first contact and the second contact is smaller than a distance between the first commutation contact element and the second commutation contact element in the direction of the axis.

A switching device includes an electrode housing having an opening; a first electrode provided inside the electrode housing; and a second electrode that fits in the opening such that the second electrode comes into and out of contact with the first electrode. The electrode housing generates an ablation gas through an arc generated between the first electrode and the second electrode. Until the first electrode and the second electrode become separated by a certain distance, a gas including the ablation gas is retained in an enclosed space defined by the first electrode, the second electrode, and the electrode housing. When a distance by which the first electrode and the second electrode are separated from each other exceeds the certain distance, the gas in the enclosed space is discharged through a gap defined between the opening and the second electrode, such that the gas is blown onto the arc.

A switch includes a first contact and a second contact that are placed along an operating shaft and can reciprocate with respect to each other. An end of the second contact opposite to an end thereof on the side of the first contact is housed in a housing space of a housing box. The pressure in the housing space is increased due to an arc generated when the first contact approaches the second contact. The increased in the pressure causes the second contact to move toward the first contact.