The disclosure relates to an arrangement and a method for switching an open contact gap by a switching device, wherein a galvanically isolated energy transmission of high-frequency energy provides an actuator energy for at least one switching device, in particular a vacuum interrupter. For the purpose of energy transmission, the switching device is connected to the high-frequency source via a dielectric resonator, the switching device being designed such as to be configured for converting the transmitted energy into actuator energy.

The disclosure relates to an arrangement and a method for switching an open contact gap by a switching device, wherein a galvanically isolated energy transmission of high-frequency energy provides an actuator energy for at least one switching device, in particular a vacuum interrupter. For the purpose of energy transmission, the switching device is connected to the high-frequency source via a dielectric resonator, the switching device being designed such as to be configured for converting the transmitted energy into actuator energy.

A vacuum interrupter for a vacuum circuit breaker is disclosed, in which a center shield is arranged between an upper insulating envelope and a lower insulating envelope, whereby the center shield is not provided inside each of the insulating envelopes and thus outer diameters of the respective insulating envelopes are reduced.

A vacuum interrupter for a vacuum circuit breaker is disclosed, in which a center shield is arranged between an upper insulating envelope and a lower insulating envelope, whereby the center shield is not provided inside each of the insulating envelopes and thus outer diameters of the respective insulating envelopes are reduced.

A circuit closer includes: a vacuum interrupter in which one of a pair of electrodes oppositely disposed in a vacuum vessel, wherein a gap d between the pair of electrodes always satisfies d>0, and a gap d1 between the pair of electrodes in a state in which closing of a circuit is completed, is shorter than a distance d2 at which insulation between the pair of electrodes is broken down by a charge voltage V of the circuit that is to be closed, and is longer than a distance d3 at which the pair of electrodes are bridged by a deposition of an electrode metal after a closing operation, the deposition resulting from evaporation caused by heat of an arc generated when the circuit is closed.

A circuit closer includes: a vacuum interrupter in which one of a pair of electrodes oppositely disposed in a vacuum vessel, wherein a gap d between the pair of electrodes always satisfies d>0, and a gap d1 between the pair of electrodes in a state in which closing of a circuit is completed, is shorter than a distance d2 at which insulation between the pair of electrodes is broken down by a charge voltage V of the circuit that is to be closed, and is longer than a distance d3 at which the pair of electrodes are bridged by a deposition of an electrode metal after a closing operation, the deposition resulting from evaporation caused by heat of an arc generated when the circuit is closed.

A double-contact switch has first and second tubular vacuum switching chambers; a stationary electrode, between the first and second vacuum switching chamber, having a first stationary contact protruding into the first chamber and a second stationary contact protruding into the second chamber; a first electrode, arranged in the first chamber, moveable axially therein, having a contact support region and sealed off from the first chamber exterior; a second electrode, arranged in the second chamber, moveable axially therein, having a contact support region and scaled off from the second chamber exterior; a first contact compression spring applying a first spring force to the first movable electrode so the first electrode contact presses onto the contact protruding into the first chamber; and a second contact compression spring applying a greater, second spring force to the second movable electrode so the second electrode contact presses onto the contact protruding into the second chamber.

A double-contact switch has first and second tubular vacuum switching chambers; a stationary electrode, between the first and second vacuum switching chamber, having a first stationary contact protruding into the first chamber and a second stationary contact protruding into the second chamber; a first electrode, arranged in the first chamber, moveable axially therein, having a contact support region and sealed off from the first chamber exterior; a second electrode, arranged in the second chamber, moveable axially therein, having a contact support region and scaled off from the second chamber exterior; a first contact compression spring applying a first spring force to the first movable electrode so the first electrode contact presses onto the contact protruding into the first chamber; and a second contact compression spring applying a greater, second spring force to the second movable electrode so the second electrode contact presses onto the contact protruding into the second chamber.

A vacuum circuit breaker comprises a vacuum interrupter operable between a closed state and an open state, and an actuator. The actuator comprises a piezoelectric driving element that is expandable and contractable along an expansion axis in response to an electrical input signal. The actuator further comprises a mechanical amplifying structure extendable along an actuation axis and being mechanically coupled to the piezoelectric driver such that expansion or contraction of said piezoelectric driving element causes the amplifying structure to extend or retract along the actuation axis. The mechanical amplifying structure is coupled to the vacuum interrupter for operating the vacuum interrupter between said closed and open states.

A vacuum circuit breaker comprises a vacuum interrupter operable between a closed state and an open state, and an actuator. The actuator comprises a piezoelectric driving element that is expandable and contractable along an expansion axis in response to an electrical input signal. The actuator further comprises a mechanical amplifying structure extendable along an actuation axis and being mechanically coupled to the piezoelectric driver such that expansion or contraction of said piezoelectric driving element causes the amplifying structure to extend or retract along the actuation axis. The mechanical amplifying structure is coupled to the vacuum interrupter for operating the vacuum interrupter between said closed and open states.