A pole actuation booster mechanism for a four-poles low voltage circuit breaker, which includes: a first operating member adapted to be operatively connected to the operating shaft of the circuit breaker and moving together with said shaft during its rotation from an open position to a closed position, and vice-versa, of said circuit breaker over a range of movement having a first, a second and a third portion of movement, the first operating member having a first operating end; an operating assembly including at least an elastic element operatively connected to a lever, the first operating member being disengaged from said operating assembly during the first portion of its movement and engaged with the lever during the second and third portions of its movement. During a closing operation of the circuit breaker the first operating member moves first along the first portion of movement driven by the operating shaft and disengaged from the operating assembly, then moves along the second portion of movement driven by the operating shaft and engaged with the lever and transmitting energy to the operating assembly; and finally moves along the third portion of movement driven by the lever and transmitting energy to the operating shaft.

A switching device for low-voltage or medium-voltage applications including: one or more electric poles; for each electric pole, at least a fixed contact and at least a movable contact, each movable contact being reversibly movable between a coupled position, at which the movable contact is coupled with a corresponding fixed contact, and an uncoupled position, at which the movable contact is separated from the fixed contact, wherein a separation gap is present between the movable contact and the fixed contact, when the movable contact is in the uncoupled position. The switching device includes, for each electric pole, at least an arc-diverting element made of electrically insulating material.

A circuit breaker includes an electrically insulative case and a rotor assembly disposed within the electrically insulative case. The rotor assembly includes a contact arm and a rotor that is rotatable relative to the electrically insulative case. The contact arm is coupled to the rotor and movable between a first position in which a conductive path is closed and a second position in which the conductive path is open. The rotor assembly also includes a latch mechanism coupled to the rotor. The latch mechanism retains the contact arm in the second position during a short circuit event. The latch mechanism is spaced from the contact arm when the contact arm is in the first position. The latch mechanism engages the contact arm when the contact arm is in the second position.

A rotating dual break point contact includes a rotor support, a first shaft, a second shaft, a third shaft, a first connection rod, a second connection rod, a contact bridge and a contact spring. The contact bridge is provided in the rotor support, and the contact bridge rotates relative to the rotor support by means of the first shaft, the second shaft, the third shaft, the first connection rod and the second connection rod. The contact bridge rotates between an initial pressure position and a maximum repulsion position. A single contact spring is mounted on one side of the contact bridge and is located in the rotor support.

A rotating switch contact apparatus has an apparatus housing; a contact housing; a housing bearing provided in the contact apparatus housing, the housing being rotatably mounted in the bearing; and a contact bridge mounted in the housing, rotating with the latter and having, at each end, a stationary mating contact receptacle, receptacles protruding from housing openings so the receptacles engage stationary mating contacts during contact housing rotation and may produce electrical contact between stationary mating contacts via the contact bridge. At least one spring terminal is arranged between the housing and bridge, which is resiliently mounted in the housing approximately perpendicular to the apparatus rotational plane. The contact housing is approximately cylindrical and at least partially has, on its lateral surface, a gearwheel section, and has an opening through which the gearwheel section projects, so the housing is rotationally movable for contact opening or closing between stationary mating contacts and receptacles via a gearwheel engaging in the gearwheel section.

An apparatus for reconfiguring a high-voltage circuit. The apparatus has a planar substrate, a non-conductive arm comprising a first contact and a rotary actuator having a body fixed to the substrate and a rotatable element fixed to the arm. The actuator is configured to selectably rotate the arm between a first position and a second position relative to the substrate. The apparatus also has a second contact fixed to the substrate such that the first contact makes conductive contact with the second contact when the arm is in the first position. The apparatus has a breakdown voltage that is greater than or equal to 500V.

A low voltage switch pole including an insulating casing defining an internal space with a contact area and an arc extinguishing area, a fixed contact assembly and a movable contact assembly being position in the contact area, the movable contact assembly being movable between a closed position in which it is into contact with the fixed contact assembly and an open position in which it is spaced apart from the fixed contact assembly, an arc chamber including a plurality of substantially parallel metallic plates being position in the arc extinguishing area, wherein fixed contact assembly is provided with a contact support, a contact surface contacting the movable contact assembly in the closed position and positioned on the contact support, and a conductive expansion plate positioned on the contact support and extending toward the arc chamber, and wherein the fixed contact assembly is provided with a gasifying plate which is directly mounted on the conductive expansion plate.

The present disclosure provides a contact actuating unit for an electrical circuit breaker. The contact actuating unit includes an electro-mechanical device. An actuator of the electro-mechanical device is connected to a contact arrangement in the electrical circuit breaker. The contact actuating unit further comprises a control unit. The control unit is configured to control the electro-mechanical device to move the actuator and to bring the contact arrangement from a first to a second position.

The contact actuating unit further includes a command feed forward or motion trajectory and feed forward controller, configured to provide one or more data signals. At least one of the provided data signals is indicative of a predetermined force and/or torque value, adapted to command the control unit to move the contact arrangement with the actuator to a predetermined position.

An electric switch including a frame, a first stationary contact, a roll element adapted to rotate relative to the frame, a rotating contact stationary fixed to the roll element, and an arc extinguisher plate system. The arc extinguisher plate system includes at least one first arc extinguisher plate for extinguishing an electric arc generated during an opening event between the first stationary contact and a first contact portion of the rotating contact. The at least one first arc extinguisher plate is fixed to the roll element.

An electric switch including a frame, a first stationary contact, a roll element adapted to rotate relative to the frame, a rotating contact stationary fixed to the roll element, and an arc extinguisher plate system. The arc extinguisher plate system includes at least one first arc extinguisher plate for extinguishing an electric arc generated during an opening event between the first stationary contact and a first contact portion of the rotating contact. The at least one first arc extinguisher plate is fixed to the roll element.