A circuit interrupter includes a first set of contacts connected in series with a second set of contacts, with both sets of contacts configured to open and close simultaneously. First and second arc extinguishers are associated with the first and second sets of contacts, respectively. A moveable permanent magnet moves as the sets of contacts simultaneously open and close, the moveable magnet generating a moveable magnetic field, a first stationary permanent magnet associated with the first arc extinguisher, the first stationary magnet generating a first stationary magnetic field, where the first stationary magnetic field and the moveable magnetic field are additive, and a second stationary permanent magnet associated with the second arc extinguisher, the second stationary magnet generating a second stationary magnetic field, where the second stationary magnetic field and the moveable magnetic field are also additive.

A circuit interrupter includes a first set of contacts connected in series with a second set of contacts, with both sets of contacts configured to open and close simultaneously. First and second arc extinguishers are associated with the first and second sets of contacts, respectively. A moveable permanent magnet moves as the sets of contacts simultaneously open and close, the moveable magnet generating a moveable magnetic field, a first stationary permanent magnet associated with the first arc extinguisher, the first stationary magnet generating a first stationary magnetic field, where the first stationary magnetic field and the moveable magnetic field are additive, and a second stationary permanent magnet associated with the second arc extinguisher, the second stationary magnet generating a second stationary magnetic field, where the second stationary magnetic field and the moveable magnetic field are also additive.

An arc box and an electromagnetic contactor comprising same are disclosed. The arc box according to an embodiment of the present disclosure comprises a coupling protrusion. The coupling protrusion is inserted into and coupled to a grid coupling hole of an arc chamber. Therefore, the arc chamber can be stably coupled to the arc box. In one embodiment, the coupling can be performed through snap fastening. Therefore, the arc chamber and the arc box can be easily coupled. A rib part is formed on the arc box. The rib part is positioned to be adjacent to the coupled arc chamber so as to prevent pitching of the arc chamber. Therefore, the arc chamber coupled to the arc box can stably maintain a stopping state.

An arc box and an electromagnetic contactor comprising same are disclosed. The arc box according to an embodiment of the present disclosure comprises a coupling protrusion. The coupling protrusion is inserted into and coupled to a grid coupling hole of an arc chamber. Therefore, the arc chamber can be stably coupled to the arc box. In one embodiment, the coupling can be performed through snap fastening. Therefore, the arc chamber and the arc box can be easily coupled. A rib part is formed on the arc box. The rib part is positioned to be adjacent to the coupled arc chamber so as to prevent pitching of the arc chamber. Therefore, the arc chamber coupled to the arc box can stably maintain a stopping state.

A switch assembly, a system, and a method are provided. One such switch assembly includes a first connection bus to connect to a power source or a load and a second connection bus to connect to one of a second power source or the load. The switch assembly includes a shaft, a driving mechanism to engage the shaft, and a toggle arm connected to the first connection bus and secured to the driving mechanism. The switch assembly includes a pivot arm electrically connected to the second connection bus and including a contact pad. The shaft is structured to rotate the toggle arm from a closed position to an open position by rotating the driving mechanism, and in the closed position, a contact pad of the toggle arm contacts the contact pad of the pivot arm. The pivot arm is maintained substantially parallel to the second connection bus.

The present invention provides an arc-extinguishing device, including an arc-extinguishing chamber, where the arc-extinguishing chamber includes a support, a plurality of arc-extinguishing grid sheets, a first gas-evolving hood, and a second gas-evolving hood; the plurality of arc-extinguishing grid sheets are mounted on the supports, the arc-extinguishing grid sheet has a groove to form a moving track for a moving contact, both sides of the groove extend toward the moving contact respectively to form a first extension leg and a second extension leg, an end and an inner side of the first extension leg are wrapped by the first gas-evolving hood, and an end and an inner side of the second extension leg are wrapped by the second gas-evolving hood; a surface of the gas-evolving hood extending along the inner side of the extension leg toward the groove is referred to as a wrapping surface.

An electromechanical switching device for breaking an electric current, the switching device including a stationary main contact; a movable main contact; a stationary arcing contact; a movable arcing contact, the stationary arcing contact and the movable arcing contact being arranged in parallel with the stationary main contact and the movable main contact; an actuating arrangement configured to move the movable main contact and the movable arcing contact; and a magnetic member arranged to generate a magnetic holding force in response to an electric current flow through the movable arcing contact when the movable arcing contact is in the closed position, the magnetic holding force acting on the movable arcing contact in a direction against the stationary arcing contact.

The present disclosure relates to an arc extinguishing assembly including a sealing member and a circuit breaker including same. The sealing member is pressed and elastically deformed between coupling surfaces of the arc extinguishing assembly and the circuit breaker, and accordingly, a gap between the coupling surfaces of the arc extinguishing assembly and the circuit breaker is sealed. Accordingly, when an arc is generated, a temporary pressure increase in the circuit breaker increases and the arc can be smoothly extended.

A test bench for a contactor bulb includes: a frame, configured to fix the bulb therein, and an actuation device, borne by the frame and including an output shaft, centred on a longitudinal axis and translationally movable with respect to the frame parallel to the longitudinal axis between a front position and a rear position, the output shaft being configured to be connected to an actuation rod of the bulb. The actuation device is a moving magnet electromagnetic actuator.

A circuit interrupter includes a first set of contacts connected in series with a second set of contacts, with both sets of contacts configured to open and close simultaneously. First and second arc extinguishers are associated with the first and second sets of contacts, respectively. A moveable permanent magnet moves as the sets of contacts simultaneously open and close, the moveable magnet generating a moveable magnetic field, a first stationary permanent magnet associated with the first arc extinguisher, the first stationary magnet generating a first stationary magnetic field, where the first stationary magnetic field and the moveable magnetic field are additive, and a second stationary permanent magnet associated with the second arc extinguisher, the second stationary magnet generating a second stationary magnetic field, where the second stationary magnetic field and the moveable magnetic field are also additive.