An electromagnetic relay includes a base, a spool provided on the base, a coil wound on the spool, a yoke inserted into a hole formed in the spool, an armature movably disposed on the base, a movable contact fixed on the base, a static contact fixed on the base, a driving member connected between the armature and the movable contact, and an elastic pressing member fixed on the base. The elastic pressing member is pressed against an outer side of the armature so as to position the armature on the base and provide an auxiliary thrust to the armature.

An electromagnetic relay includes a base, a spool provided on the base, a coil wound on the spool, a yoke inserted into a hole formed in the spool, an armature movably provided on the base, a movable contact fixed on the base, a static contact fixed on the base, and a driving member connected between the armature and the movable contact. The yoke is L-shaped. The yoke and the armature form a rectangular magnetic loop.

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.

A contact spring for a cradle relay of an electrical switch comprises a switching leg and a hook extending from the switching leg. The switching leg has a contact. The hook has a first tongue bent back toward the switching leg.

A spring for an electrical switch comprises a contact arm and a base from which the contact arm extends. The contact arm has a contact member. The base has a terminal and an extension. The extension extends from the contact arm to the terminal and away from a remaining base.

An electromechanical relay comprises a contact assembly including a stationary contact and a movable contact, an electromagnetic actuator assembly actuating the movable contact, a housing encasing the contact assembly and the electromagnetic actuator assembly, and a test button that is rotatable and engages the actuator arm. The electromagnetic actuator assembly includes a coil assembly generating a magnetic field and an actuator arm that is movable to engage the movable contact and actuate the movable contact in response to the magnetic field. The actuator arm is slidable in a direction transverse to a longitudinal axis of the movable contact. The movable contact is manually operable from outside the housing by rotating the test button.

An electromagnetic relay includes an electromagnet, an armature configured to shift in response to a magnetic force generated by the electromagnet, a movable spring having a movable contact disposed thereon, a fixed spring including a first contact strip and a second contact strip, the first contact strip having a first fixed contact disposed thereon, the second contact strip having a second fixed contact disposed thereon, the first fixed contact and the second fixed contact facing the movable contact, and a linkage member configured to link the armature and the movable spring to shift the movable spring in conjunction with movement of the armature.

Systems and methods for auto-monitoring a trip solenoid and a switching semiconductor in a circuit breaker comprises determining whether the trip solenoid or the switching semiconductor is open-circuited or otherwise non-operational. The trip solenoid has multiple windings therein and the switching semiconductor has multiple semiconductor switches therein. The circuit breaker automatically performs a designated action if one of the multiple windings or one of the semiconductor switches is determined to be open-circuited or otherwise non-operational. In some embodiments, the circuit breaker is a miniature circuit breaker.

An electromagnetic relay includes an electromagnet device, an armature and a fixed terminal. By coil current through a coil, the electromagnet device generates first magnetic flux that forces the armature and the electromagnet device together or apart in a first end in a first direction of the armature. The armature is connected with a movable contact at a second end of the first direction and forces the movable contact and a fixed contact together or apart according to coil current. The fixed terminal is electrically connected with the fixed contact, and provided around the armature so as to cross the armature as seen from a second direction perpendicular to the first direction with the armature closing the fixed and movable contacts. Electric current through the fixed terminal generates a second magnetic flux in the armature, a direction of which is opposite to that of the first magnetic flux.

A contact device including a fixed contact member having a fixed contact; and a movable contact member which includes a movable contact and is movable between a position where the movable contact is in contact with the fixed contact and a position where the movable contact is away from the fixed contact, a first contact member which is one of the fixed contact member and the movable contact member further including a recess in a surface to which a first contact of the first contact member is provided. The first contact protrudes toward a second contact of a second contact member which is another of the fixed contact member and the movable contact member, and a periphery of the recess at least partially surrounding a periphery of the first contact in a surface perpendicular to a protruding direction of the first contact.