A closing spring assembly for an electrical switching device is provided. The closing spring assembly is configured to exert a closing force on a moving contact of the switching device. The closing force helps to maintain physical and electrical contact between the moving contact and an associated stationary contact, so that the moving and stationary contacts form a path for conducing electric current through the switching device. The closing spring assembly is configured so that the closing force remains constant or decreases as the moving contact is driven away from the stationary contact during switching of the current path away from the moving and stationary contacts.

A first yoke is arranged in a contact direction with respect to a movable contact piece. A second yoke is arranged in an opening direction with respect to the movable contact piece. The first yoke and the second yoke are configured to generate a magnetic force that attracts the first yoke and the second yoke to each other when the movable contact contacts the fixed contact and is energized. The first yoke and the second yoke are arranged not to contact each other so that the movable contact piece can contact the fixed terminal in a state where the movable contact and the fixed contact are lost.

A first yoke is arranged in a contact direction with respect to a movable contact piece. A second yoke is arranged in an opening direction with respect to the movable contact piece. The first yoke and the second yoke are configured to generate a magnetic force that attracts the first yoke and the second yoke to each other when the movable contact contacts the fixed contact and is energized. The first yoke and the second yoke are arranged not to contact each other so that the movable contact piece can contact the fixed terminal in a state where the movable contact and the fixed contact are lost.

In an embodiment a contact arrangement includes a retaining element with a cylindrical hole having a cylinder axis configured to arrange the retaining element on a shaft and a contact bridge attached to the retaining element, wherein the contact bridge has a top side with at least one contact region and a bottom side opposite the top side, and wherein, via a rotation around the cylinder axis, the contact bridge is transferable to a locked state on the retaining element in a direction along the cylinder axis.

In an embodiment a contact arrangement includes a retaining element with a cylindrical hole having a cylinder axis configured to arrange the retaining element on a shaft and a contact bridge attached to the retaining element, wherein the contact bridge has a top side with at least one contact region and a bottom side opposite the top side, and wherein, via a rotation around the cylinder axis, the contact bridge is transferable to a locked state on the retaining element in a direction along the cylinder axis.

In an embodiment a switching device includes at least one stationary contact and a movable contact movable from a first switching state to a second switching state by a magnetic armature, wherein the magnetic armature has a spring configured to reset the movable contact from the second switching state to the first switching state, and wherein the spring has a first spring region with a first spring constant and a second spring region with a second spring constant which is greater than the first spring constant.

In an embodiment a switching device includes at least one stationary contact and a movable contact movable from a first switching state to a second switching state by a magnetic armature, wherein the magnetic armature has a spring configured to reset the movable contact from the second switching state to the first switching state, and wherein the spring has a first spring region with a first spring constant and a second spring region with a second spring constant which is greater than the first spring constant.

A system may include a relay device. The relay device may include an armature that moves between a first position that electrically couples a first contact to a second contact and a second position that electrically uncouples the first contact from the second contact. The relay device may also include a relay coil that receives a voltage configured to magnetize a relay coil, thereby causing the armature to move from the first position to the second position. The system also includes a control system that receives an indication that the armature is in the second position and sends a signal to an actuator in response to receiving the indication. The signal causes an arm associated with the actuator to move the armature to achieve a gap distance between the first contact and the second contact.

In an embodiment a switching device includes a first fixed contact element, a second fixed contact element, a movable contact bridge, a movable shaft configured to move the contact bridge, wherein the contact bridge is arranged at an end of the shaft, wherein the shaft is movable to a first position at which the contact bridge contacts the first and second contact elements, and wherein the shaft is movable to a second position at which the contact bridge is arranged at a distance from the first and second contact elements and a setting device configured to set the distance between the contact bridge and the first and second contact elements in the second position, wherein the setting device is arranged at the end of the shaft, and wherein the switching device is configured to switch an electrical load.

A contactor with a rotary actuation system, the contactor including a plurality of switching devices configured to switch a plurality of electrical circuits, a plurality of cam followers each operably coupled to one of the switching devices, wherein each cam follower is configured to actuate a switching device, and a cam mechanism, the cam pivotally attached to a point rotation, the cam having plurality of lobes about its perimeter, the cam in operable communication with each cam follower such that upon rotation of the cam mechanism, each cam follower engages a lobe of the plurality of lobes, it causes each cam follower to actuate the respective switching device. The contactor also includes an actuator connected to the cam, the actuator responsive to a control current and operable to rotate the cam and a controller, the controller operable to supply a control current the actuator.