A magnetic module in a circuit interrupting system is configured to generate a blow-on force that pushes a moving contact toward a stationary contact. The magnetic module includes: a coil conductor having an opening through which a moving stem of the moving contact may move, wherein the coil conductor is electrically connected to the moving stem and a first auxiliary conductor, wherein the coil conductor is configured to allow current to flow from the moving stem to the first auxiliary conductor; a plunger attached to an end of the moving stem; and a first magnetic core shaped to fit around a first section of the coil conductor, wherein the first magnetic core is configured, when current flows through the coil conductor to the first auxiliary conductor, to become magnetized, attract the plunger toward the magnetic core, and cause the moving stem of the moving contact to move toward the stationary contact.

A power switch device has a housing, a movable shuttle and at least one shape memory alloy actuator. The housing has a cavity and stationary current carrying contacts which extend through the housing to the cavity. The movable shuttle with a bridge contact provided in the cavity. The at least one shape memory alloy actuator is attached to a first end of the shuttle and to a first end of the housing. The at least one shape memory alloy actuator is configured to respond to a first activation signal. The at least one shape memory alloy actuator contracts from an initial shape in response to the first actuation signal to move the shuttle and the bridge contact toward the stationary current carrying contacts to a closed position in which the bridge contact is positioned in electrical engagement with the stationary current carrying contacts.

An electrical contact switch for use in an electrical contactor, which comprises first and second electrical terminals, an electrically-conductive busbar in electrical communication with the first electrical terminal, and at least one fixed electrical contact which is attached to the electrically-conductive busbar. The switch also has an electrically-conductive moveable arm in electrical communication with the second electrical terminal, with at least one moveable electrical contact which is attached to the electrically-conductive moveable arm to form an electrical contact set with the fixed electrical contact. A fixed ferromagnetic element is positioned at or adjacent to a side of the electrically-conductive moveable arm proximate the second electrical terminal, and a moveable ferromagnetic element is provided in physical communication with a side of the electrically-conductive moveable arm which is opposite to the fixed ferromagnetic element. In a closed condition of the electrical contact set, the electrically-conductive moveable arm induces a magnetic field in the fixed and moveable ferromagnetic elements, and thus the moveable ferromagnetic element is magnetically attracted towards the fixed ferromagnetic element to thereby increase a contact pressure on the electrical contact set. An electrical contactor and method of preventing or inhibiting contact bounce of an electrical contactor are also provided.

An electrical contact switch for use in an electrical contactor, which comprises first and second electrical terminals, an electrically-conductive busbar in electrical communication with the first electrical terminal, and at least one fixed electrical contact which is attached to the electrically-conductive busbar. The switch also has an electrically-conductive moveable arm in electrical communication with the second electrical terminal, with at least one moveable electrical contact which is attached to the electrically-conductive moveable arm to form an electrical contact set with the fixed electrical contact. A fixed ferromagnetic element is positioned at or adjacent to a side of the electrically-conductive moveable arm proximate the second electrical terminal, and a moveable ferromagnetic element is provided in physical communication with a side of the electrically-conductive moveable arm which is opposite to the fixed ferromagnetic element. In a closed condition of the electrical contact set, the electrically-conductive moveable arm induces a magnetic field in the fixed and moveable ferromagnetic elements, and thus the moveable ferromagnetic element is magnetically attracted towards the fixed ferromagnetic element to thereby increase a contact pressure on the electrical contact set. An electrical contactor and method of preventing or inhibiting contact bounce of an electrical contactor are also provided.

An electromagnetic relay has a contact device and an electromagnet device. An electromagnetic relay has stators which are a pair of rod-like members, and a mover. The mover may face the side of the stator. A housing supports the stator and accommodates the mover. A yoke is fixed to the housing so as to face the movable facing surface and contains a soft magnetic material.

An electromagnetic relay has a contact device and an electromagnet device. An electromagnetic relay has stators which are a pair of rod-like members, and a mover. The mover may face the side of the stator. A housing supports the stator and accommodates the mover. A yoke is fixed to the housing so as to face the movable facing surface and contains a soft magnetic material.

A movable spring plate structure for defining an open or closed state with respect to a fixed contact includes a rigid spring plate contact portion, a soft spring plate warp portion, a soft spring plate force-applying portion and a movable contact. The soft spring plate warp portion is coupled to the rigid spring plate contact portion, and a first deformation gap is formed between the rigid and soft spring plate contact portions. The rigid spring plate contact portion is harder than the soft spring plate warp portion. The soft spring plate force-applying portion is disposed at the soft spring plate warp portion, and the movable contact is disposed at the rigid spring plate contact portion. A force applied to the soft spring plate force-applying portion drives the movable and fixed contacts into a closed state.

A contactor includes first and second fixed contacts coupled to a housing having mating ends located in the cavity. The contactor includes a movable contact movable within the cavity between a mated position and an unmated position. The movable contact engages the second mating end in the mated position and is separated from the second fixed contact in the unmated position. The contactor includes a coil assembly in the cavity operated to move the movable contact. The contactor includes a magnetic shroud coupled to at least one of the movable contact and the second fixed contact to provide a magnetic holding force to hold the movable contact relative to the second fixed contact in the mated position.

A contactor includes first and second fixed contacts coupled to a housing having mating ends located in the cavity. The contactor includes a movable contact movable within the cavity between a mated position and an unmated position. The movable contact engages the second mating end in the mated position and is separated from the second fixed contact in the unmated position. The contactor includes a coil assembly in the cavity operated to move the movable contact. The contactor includes a magnetic shroud coupled to at least one of the movable contact and the second fixed contact to provide a magnetic holding force to hold the movable contact relative to the second fixed contact in the mated position.

A control system is designed to control an interrupter. The interrupter is started by a startup current to interrupt a main electric circuit. The startup current flows through an auxiliary electric circuit and has a current valve equal to or greater than a predetermined value. The control system includes a driving unit and a driven unit. The driving unit includes an intermediate electrical path to be connected to the main electric circuit. The driven unit is to be connected to the auxiliary electric circuit. When an abnormal current having a current value equal to or greater than a prescribed value flows through the intermediate electrical path, the driving unit uses, as a drive source for driving the driven unit, the abnormal current flowing through the intermediate electrical path. The driven unit supplies the auxiliary electric circuit with the startup current by being driven by the driving unit.