Abstract: The present disclosure aims to provide an electrical contact to which a low boiling point metal is added, the electrical contact being able secure both mechanical strength and conductivity at the same time. The electrical contact according to the present disclosure includes a base material made of Cu, particles of a high melting point substance dispersed in the base material, the particles being made of at least one of a high melting point metal or a carbide of the high melting point metal, and Te and Ti dispersed in the base material, wherein, the Te of 3.5 to 14.5 mass % is added where the total is 100 mass %, and Ti/Te is 0.12 to 0.38.

Abstract: A load break tool is disclosed. The load break tool includes a main housing; a sleeve having a first end and a second end coaxially mounted in the main housing and slidable between a retracted position and an extended position, wherein the second end of the sleeve remains in the main housing in the extended position; a clip assembly connected to the main housing for engaging a pull ring of a circuit isolating device; and a hook engaging terminal rotatably connected to the first end of the sleeve, such that the hook engaging terminal rotates relative to the clip assembly.

Abstract: A vacuum circuit breaker serving as a switch includes a pair of electrodes that serve as a stationary electrode and a movable electrode, a handler including a movable shaft and a housing that operate as a first mover in withdrawing the movable electrode from the stationary electrode and closing the movable electrode toward the stationary electrode, a movable shaft that is connected as a second mover to the movable electrode, a coil spring that is connected as an elastic between the first mover and the second mover to press the movable electrode against the stationary electrode, and a shock absorber that attenuates as an attenuator contraction of the elastic when the movable electrode is withdrawn from the stationary electrode.

Abstract: Electrical switch contact sets are disclosed. A disclosed example apparatus includes a movable platform having first and second contacts, where the first and second contacts electrically coupled via the movable platform, and a stationary portion having third and fourth contacts, where the movable platform is movable to bring the first and second contacts in contact with the third and fourth contacts, respectively, to simultaneously close a current path of an electrical circuit associated with the first, second, third and fourth contacts.

Abstract: An electrical contactor has an arc extinguishing component. The electrical contactor includes a first electrical contact and a second electrical contact that, when the contactor is open, define a gap therebetween. The arc extinguishing component includes a magnet adjacent a first side of the gap and an electrically non-conductive shutter adjacent an opposing second side of the gap. The electrically non-conductive shutter capable of reciprocating from a first position to a second position wherein the first position is outside of the gap and the second position is within the gap.

Abstract: A system for controlling a vacuum interrupter for a power diverter switch comprises a main driving shaft which is configured to drive the control cam. The system further comprises the vacuum interrupter which is configured to separate electrical contacts in a vacuum by use of a contact rod, and a transmission unit which is configured to transmit the force generated by the main driving shaft to the contact rod. The transmission unit comprises a plurality of rollable guiding elements and a lever mechanism which is coupled to both the control cam and the contact rod of the vacuum interrupter such that a rotation of the control cam generated by the main driving shaft causes a movement of the contact.

Abstract: In a vacuum container (1) of a vacuum interrupter (1A), an insulating cylindrical body (10) is sealed with a fixed-side flange (11a) on the fixed side in the axial direction, and is sealed with a movable-side flange (11b) on the movable side in the axial direction. In the fixed-side flange (11a) and the movable-side flange (11b), annular expansion portions (5a, 5b) are formed between middle portions (3a, 3b) and outer peripheral edge portions (4a, 4b), respectively. The annular expansion portions (5a, 5b) are respectively formed in annular shapes extending along the outer peripheries of the middle portions (3a, 3b), and in shapes expanding in the axial outer side direction of the vacuum container (1), such that an arch structural effect can be obtained.

Abstract: The present disclosure relates to a contact point monitoring module for a vacuum circuit breaker and a vacuum circuit breaker comprising the same. The present disclosure provides a vacuum circuit breaker comprising a push rod assembly which is coupled to a movable electrode of a vacuum interrupter and moves the movable electrode up or down to make a movable contact in a contact closed state or a contact open state, wherein the vacuum circuit breaker comprises a linear sensor which is coupled to a lower side of the push rod assembly and senses displacement according to a moving direction of the push rod; and a sensor holder which is installed adjacent to the lower side of the push rod assembly and is coupled to the linear sensor to process a signal transferred from the linear sensor.

Abstract: The present disclosure relates to a motion sensing device for a vacuum circuit breaker and a vacuum circuit breaker comprising same. In the present disclosure, the motion sensing device for a vacuum circuit breaker is provided with a push rod assembly coupled to a movable electrode of a vacuum interrupter to elevate or lower the movable electrode, wherein the motion sensing device comprises: a sensor module spaced apart from the push rod assembly and arranged to face a side of a rod housing; and a sensing unit installed on a side of the push rod assembly and arranged to face the sensor module that senses the movement of the sensing unit.

Abstract: An arc flash management system including a cabinet having multiple walls surrounding electrical equipment capable of producing arc flash, at least one aperture within one of the walls, and an arc exhaust attachment emanating from at least one of the apertures for directing possible arc flash away from the cabinet.

Abstract: A relay includes a housing, an electric contact system in the housing, an electromagnetic system in the housing, and a magnetic blowing arc-extinguish device. The electric contact system includes a static contact with a static contact portion and a movable contact with a movable contact portion. The electromagnetic system is configured to drive the movable contact to move between a closed position in which the movable contact is in electrical contact with the static contact and an opened position in which the movable contact is separated from the static contact. The magnetic blowing arc-extinguish device includes a permanent magnet statically provided near the static contact and configured to lengthen an electric arc between the static contact portion and the movable contact portion by an electromagnetic force to extinguish the electric arc.

Abstract: A relay includes a movable contact piece having a movable contact, a fixed contact, a drive device configured to move the movable contact piece, a magnet to apply a Lorentz force to an arc in a first extension direction, a fixed terminal having an intermediate portion to apply a Lorentz force to the arc in a second extension direction, and a wall portion. The wall portion includes first and second wall surfaces. The first wall surface is disposed to face an arc-extinguishing space, and is disposed opposite to the movable contact and the fixed contact in the first extension direction. The second wall surface is disposed to face the arc-extinguishing space and is disposed downstream in the second extension direction with respect to the first wall surface. A distance from the movable contact piece to the second wall surface differs from a distance to the first wall surface.

Abstract: A relay includes a fixed contact, a movable contact piece including a movable contact, a movable portion, a coil, a return spring, and a contact spring. The movable portion includes a drive shaft and a movable iron core. The drive shaft is fixed to the movable contact piece in a contact case and extends from an inside of the contact case to an outside of the contact case. The movable iron core is connected to the drive shaft outside the contact case. The return spring urges the movable portion in an open direction in which the movable contact is separated from the fixed contact. The contact spring urges the drive shaft in a contact direction in which the movable contact contacts the fixed contact. The contact spring is arranged outside the contact case.

Abstract: A vacuum circuit breaker includes: a grounded tank; a vacuum valve including a vacuum container housing a movable contact and a stationary contact, a movable conductor that is connected to the movable contact and extends out of the vacuum container, and a tubular bellows; a tubular movable-side bushing conductor; a slider movably set inside the movable-side bushing conductor; a movable-side frame that communicates with a space inside a tube of the bellows and electrically connects the movable-side bushing conductor to the movable conductor; an operation rod having one end protruding to an outside of the grounded tank and an opposite end connected to the movable conductor; an operating device that moves the operation rod; a movable-side support plate covering an end of the grounded tank where the operation rod extends out of the grounded tank; and a packing set in a hole.

Abstract: A pressure release device includes a movable pressure release wall that can be moved relative to a pressure release opening. The pressure release wall, by virtue of its position relative to the pressure release opening, controls the passability of the opening. A detent stop is arranged in a path of movement of the pressure release wall.

Abstract: A conductor arrangement for a circuit breaker interrupter, the conductor arrangement including: a tubular body conductor including a first metal material, and an at least partly tubular contact conductor including a second metal material; wherein a tubular end portion of the tubular body conductor is mechanically and electrically joined with a tubular end portion of the tubular contact conductor in an circumferential overlap region formed by longitudinally press-fitting one of the tubular body conductor and the tubular contact conductor into the other one of the tubular body conductor and the tubular contact conductor, wherein the outer one of the tubular end portions of the tubular body conductor and the at least partly tubular contact conductor at the overlap region includes copper and the inner one includes aluminum.

Abstract: An interrupter unit includes a vacuum switch tube and an insulating housing. The insulating housing has an inner surface. The vacuum switch tube is bordered at least partially by an electrically insulating structure material having an outer surface. The insulating housing at least partially surrounds the vacuum switch tube. In operation, inner surface of the insulating housing and outer surface of the vacuum switch tube are separated by an adhesion layer. The inner surface and the outer surface are provided at least partially with an electrically conductive layer such that, in a boundary region between vacuum switch tube and insulating housing, the following layer sequence is directed radially outwards from a switch axis: structure material of vacuum switch tube; outer surface of structure material; conductive layer on outer surface of structure material; adhesion layer; conductive layer on insulating housing; inner surface of insulating housing; volume material of insulating housing.

Abstract: Systems and methods for improving control of an internal arc fault in equipment. The equipment includes a bus configured to provide three-phase power from an incoming line. Furthermore, the equipment includes a current loop formed from a first conductor and a second conductor, where current is received from the bus. The current loop uses electromagnetic forces of a short-circuit current caused by an internal arcing fault of the equipment to move the first and second conductors relative to each other. In response to the movement of the first and second conductors, the current loop creates a gap between the first and second conductors where a new arc ignites at the gap. In this manner, the loop design takes advantage of the natural electromagnetic force to reduce the arc energy at the point of initiation and relocates the energy release point to an exhaust vent of the equipment.

Abstract: A device for switching a medium-voltage electrical circuit, including: a vacuum interrupter including a mobile electrode, an actuating lever linked to the mobile electrode and mobile between an opening position and a closing position, an insulator linked to the actuating lever, a control fitting secured to the mobile electrode, and an elastic return, for example, a spring, exerting a return force between the control fitting and the insulator, wherein a travel of displacement of the actuating lever is greater than the opening distance such that the control fitting is distanced from the insulator when the actuating lever is in the closing position. The switching device further including an indicator stem secured to the control fitting, which is configured to extend at least partly out of the insulator when the actuating lever is in the closing position.

Abstract: A hermetic portion on the side of a main body portion of a gas insulated switchgear and a hermetic portion of a bushing tank which has polymer bushings connected to the main body portion are configured separately, and electrical connection between the main body portion side and the bushing tank is carried out in an open portion. A mid tank is provided in the rear of the main body portion in which a switching apparatus is housed, and conductor portions which are horizontally led out from the main body portion are led into the mid tank, bent upward, and connected to bushings on the top of the mid tank. Cables are extended downward from the bottom of the bushing tank disposed above the mid tank via a support panel, and in the open portion, the cables are connected to the bushings.