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.

The present disclosure relates to a contact point monitoring module for a vacuum circuit breaker and a vacuum circuit breaker comprising the same. The present disclosure provides a vacuum circuit breaker comprising a push rod assembly which is coupled to a movable electrode of a vacuum interrupter and moves the movable electrode up or down to make a movable contact in a contact closed state or a contact open state, wherein the vacuum circuit breaker comprises a linear sensor which is coupled to a lower side of the push rod assembly and senses displacement according to a moving direction of the push rod; and a sensor holder which is installed adjacent to the lower side of the push rod assembly and is coupled to the linear sensor to process a signal transferred from the linear sensor.

A vacuum interrupter includes: an insulation cylinder; a fixed-side flange; a movable-side flange; a fixed-side electrode rod fixed to the fixed-side flange at one end and having a fixed-side electrode fitting shaft on a fixed-side end surface at another end; a movable-side electrode rod connected to the movable-side flange via a bellows at one end and having a movable-side electrode fitting shaft on a movable-side end surface at another end; a fixed-side windmill-shaped electrode fixed to the fixed-side electrode fitting shaft; and a movable-side windmill-shaped electrode fixed to the movable-side electrode fitting shaft. A fixed-side support member having a fixed-side spacer portion and a fixed-side planar portion is provided between the fixed-side end surface and the fixed-side windmill-shaped electrode, and a movable-side support member having a movable-side spacer portion and a movable-side planar portion is provided between the movable-side end surface and the movable-side windmill-shaped electrode.

An operation device includes a housing, an operation member, and a detector. The housing includes an electrically conductive portion on a surface thereof. The operation member is supported by the housing such that the operation member is movable in response to an operation by an operation body, and is configured to be capacitively coupled to the operation body and to the electrically conductive portion. The detector is configured to detect whether the operation body is in proximity to the operation member based on a change in capacitance at the electrically conductive portion.

A vacuum interrupter includes: an insulation cylinder; a fixed-side flange; a movable-side flange; a fixed-side electrode rod fixed to the fixed-side flange at one end and having a fixed-side electrode fitting shaft on a fixed-side end surface at another end; a movable-side electrode rod connected to the movable-side flange via a bellows at one end and having a movable-side electrode fitting shaft on a movable-side end surface at another end; a fixed-side windmill-shaped electrode fixed to the fixed-side electrode fitting shaft; and a movable-side windmill-shaped electrode fixed to the movable-side electrode fitting shaft. A fixed-side support member having a fixed-side spacer portion and a fixed-side planar portion is provided between the fixed-side end surface and the fixed-side windmill-shaped electrode, and a movable-side support member having a movable-side spacer portion and a movable-side planar portion is provided between the movable-side end surface and the movable-side windmill-shaped electrode.

An operation device includes a housing, an operation member, and a detector. The housing includes an electrically conductive portion on a surface thereof. The operation member is supported by the housing such that the operation member is movable in response to an operation by an operation body, and is configured to be capacitively coupled to the operation body and to the electrically conductive portion. The detector is configured to detect whether the operation body is in proximity to the operation member based on a change in capacitance at the electrically conductive portion.

The invention relates to a vacuum arc extinguishing chamber contact, a vacuum arc extinguishing chamber and a vacuum circuit breaker. The contact includes a contact blade, a first contact cup and a second contact cup. The first contact cup is arranged in the second contact cup. One end of the first contact cup is connected with the second contact cup, and the other end of the first contact cup is connected with the contact blade. The contact blade is connected with the second contact cup. According to the invention, a single longitudinal magnetic field is split into a plurality of independent longitudinal magnetic field areas, a plurality of coils are used for shunting current, and the current density is reduced, thereby solving the contradiction between interrupting of the large short-circuit current and the temperature rise of the large rated current.

Various embodiments include a method for manufacturing a contact component for an electrical switch with a contact surface for closing in electrical contact comprising manufacturing the contact component at least partially using a powder. At least two powder types are used to create different material compositions in the contact component. Manufacturing the contact component include using an additive fabrication process based on a powder bed. The contact component includes a sequence of layers. At least two of the layers include different powder types.

An electrode assembly for a vacuum interrupter includes a contact plate, an electrode coil, an inner support, a lower support, and at least one support member. The electrode coil includes a base for attachment to a terminal post of the vacuum interrupter. The electrode coil also includes at least one arcuate arm between the base and the contact plate extending along a curved path in a plane substantially perpendicular to a direction of travel of the electrode assembly. Each arcuate arm includes an aperture that is positioned to align with a corresponding aperture of an adjacent arcuate arm or the base of the electrode coil. Each support member is partially positioned within aligned apertures to maintain a gap between the arcuate arms and the base. The support members and the lower support may be slotted to decrease the current flowing through the supports.

The present application discloses a DC vacuum interrupter. The cup-shaped contact of the vacuum interrupter is in a transverse magnetic field. The magnetic core is placed in the contact cup. The magnetic core inside the cup of the contact works with the permanent magnets outside the vacuum interrupter to generate transverse magnetic fields in multiple directions between the contacts. While the contacts are open, the arc burns and moves rapidly along the ring shaped contacts under the transverse field along the tangent line of the contacts. While the arc moves rapidly along the ring-shaped contacts, the arc column passes the permanent magnets structure and works with the magnetic core to generate multi-polar transverse magnetic field. While the arc column makes a turn, the number of the transverse fields which are cut by the arc is same with the number of the permanent magnets set.