A high speed arc suppressor and method include a first phase-specific arc suppressor configured to suppress arcing across contacts of the power contactor in a positive domain and a second phase-specific arc suppressor configured to suppress arcing across the contacts in a negative domain. First and second high speed switches are configured to enable and disable operation of an associated one of the first and second phase-specific arc suppressors. First and second drivers are configured to drive the first and second high speed switches.

A sliding power contact and method includes a mobile load device connector and a socket. The mobile load device connector includes a non-current power pin having a first length, a current power pin having a second length less than the first length, a neutral pin, and a ground pin. The socket includes a non-current power contact configured to electrically couple with the non-current power pin, a current power contact configured to electrically couple with the current power pin, a neutral contact configured to electrically couple with the neutral pin, and a ground pin configured to electrically couple with the ground pin. An arc suppressor is directly coupled to at least one of the non-current power pin and the non-current power contact, wherein the arc suppressor, the non-current power pin and the non-current power contact form a current path between the current power pin and the current power contact.

An electric closer comprising a first connection lug, a second connection lug electrically insulated from the first connection lug, the first and second connection lugs each having at least one recess in a contact region disposed within a guide housing, an actuator for driving a contact element, the contact element being disposed in a guide housing between the actuator and the contact region of the connection lugs, and by the actuator from an open position, in which the connecting lugs are insulated from one another into a closed position, in which the connecting lugs are electrically connected to one another via the contact element, is displaceable, wherein in the closed position the contact element is accommodated in the recesses of the connecting lugs and wherein the contact element is guided in the displacement direction simultaneously in the respective recesses of the two connecting lugs during the displacement of the two connecting lugs.

A sliding power contact and method includes a mobile load device connector and a socket. The mobile load device connector includes a non-current power pin having a first length, a current power pin having a second length less than the first length, a neutral pin, and a ground pin. The socket includes a non-current power contact configured to electrically couple with the non-current power pin, a current power contact configured to electrically couple with the current power pin, a neutral contact configured to electrically couple with the neutral pin, and a ground pin configured to electrically couple with the ground pin. An arc suppressor is directly coupled to at least one of the non-current power pin and the non-current power contact, wherein the arc suppressor, the non-current power pin and the non-current power contact form a current path between the current power pin and the current power contact.

A fixing and unlocking mechanism for a plug-in type circuit breaker includes a housing (1) A button (2) is mounted in a button slot (101) of the housing (1). The fixing and unlocking mechanism is characterized in that the housing (1) is provided with a locking mechanism (3) therein, so that the plug-in type circuit breaker cannot be unplugged from a mounting cabinet, and the housing (1) is further provided with an unlocking mechanism (4) therein, which can unlock the locking mechanism (3) to make the plug-in type circuit breaker is unplugged from the mounting cabinet.

An arc suppressing circuit configured to suppress arcing across a power contactor coupled to an alternating current (AC) power source having a predetermined number of phases, each contact of the power contactor corresponding to one of the predetermined number of phases includes a number of dual unidirectional arc suppressors equal to the predetermined number of phases of the AC power source. Each dual unidirectional arc suppressor includes a first phase-specific arc suppressor configured to suppress arcing across the associated contacts in a positive domain, a a second phase-specific arc suppressor configured to suppress arcing across the associated contacts in a negative domain, and a coil lock controller, configured to be coupled between a contact coil driver of the power contactor, configured to detect an output condition from the contact coil driver and inhibit operation of the first and second phase-specific arc suppressors over a predetermined time.

An electric closer comprising a first connection lug, a second connection lug electrically insulated from the first connection lug, the first and second connection lugs each having at least one recess in a contact region disposed within a guide housing, an actuator for driving a contact element, the contact element being disposed in a guide housing between the actuator and the contact region of the connection lugs, and by the actuator from an open position, in which the connecting lugs are insulated from one another into a closed position, in which the connecting lugs are electrically connected to one another via the contact element, is displaceable, wherein in the closed position the contact element is accommodated in the recesses of the connecting lugs and wherein the contact element is guided in the displacement direction simultaneously in the respective recesses of the two connecting lugs during the displacement of the two connecting lugs.

A high speed arc suppressor and method include a first phase-specific arc suppressor configured to suppress arcing across contacts of the power contactor in a positive domain and a second phase-specific arc suppressor configured to suppress arcing across the contacts in a negative domain. First and second high speed switches are configured to enable and disable operation of an associated one of the first and second phase-specific arc suppressors. First and second drivers are configured to drive the first and second high speed switches.

Provided is a handcart circuit breaker and a contact device thereof including a contact arm and a moving contact. Inner walls of a cylindrical contact finger base in axial direction respectively have a contact finger groove with a spring contact finger for plugging the contact arm and a fixed contact; a rear of the contact finger base sleeves with a front of the contact arm having a positioning groove larger than a fitting end of the support pin, the contact finger base has support pins extending into the contact finger base; a diameter of a circle corresponding to the fitting end of each support pin is larger than a diameter of a circle corresponding to a bottom of each positioning groove; the contact finger base connects with the contact arm and an elastic support structure is arranged between the contact arm and the inner wall of the contact finger base.

Provided is a handcart circuit breaker and a contact device thereof including a contact arm and a moving contact. Inner walls of a cylindrical contact finger base in axial direction respectively have a contact finger groove with a spring contact finger for plugging the contact arm and a fixed contact; a rear of the contact finger base sleeves with a front of the contact arm having a positioning groove larger than a fitting end of the support pin, the contact finger base has support pins extending into the contact finger base; a diameter of a circle corresponding to the fitting end of each support pin is larger than a diameter of a circle corresponding to a bottom of each positioning groove; the contact finger base connects with the contact arm and an elastic support structure is arranged between the contact arm and the inner wall of the contact finger base.