The present disclosure provides a gas-insulated high or medium voltage circuit breaker including a first arcing contact and a second arcing contact, wherein at least one of the two arcing contacts is axially movable along a switching axis, wherein during a breaking operation, an arc between the first arcing contact and the second arcing contact is formed in an arcing region; a nozzle including a channel directed to the arcing region, for blowing an arc-extinguishing gas to the arcing region during the breaking operation; a diffuser portion adjacent to the nozzle, for transporting the gas from the arcing region to a region downstream of the diffuser portion; a buffer volume directly downstream of the diffuser portion; and an enclosure confined within a housing of the circuit breaker.

A coupler between an activator mounted on an enclosure and an electronic protection device located within the enclosure facilitates alignment between the coupler and the electronic protection device during installation and requires no tool for installation. The coupler is positioned over an opening in the electronic protection device and oriented such that a first coupling portion is configured to engage a complementary coupling portion on the electronic protection device. The coupler may be manually mounted, engaging the complementary coupling portions on the door handle coupler and the electronic protection device without requiring a tool for installation. The coupler includes an upper sleeve configured to receive an axle, also connected to the activator, that rotates independently of a lower sleeve which is mounted to the electronic protection device, facilitating orientation of the activator on the outside of the enclosure. The coupler also provides for local lock-out of the electronic protection device.

An arc-extinguishing unit structure for a direct current air circuit breaker according to one embodiment of the present disclosure comprises: a plurality of grids; side plates coupled to both sides of the plurality of grids so that the plurality of the grids are mounted so as to be spaced apart from each other; an exhaust cover positioned above the side plates and the plurality of grids; an arc guide coupled to the side plates so as to be located under the plurality of grids; a magnet coupled to the arc guide, wherein the magnet is magnetized with different poles on the basis of the plurality of grids and the vertical orientation of the arc guide.

An arc-extinguishing unit structure for a direct current air circuit breaker according to one embodiment of the present disclosure comprises: a plurality of grids; side plates coupled to both sides of the plurality of grids so that the plurality of the grids are mounted so as to be spaced apart from each other; an exhaust cover positioned above the side plates and the plurality of grids; an arc guide coupled to the side plates so as to be located under the plurality of grids; a magnet coupled to the arc guide, wherein the magnet is magnetized with different poles on the basis of the plurality of grids and the vertical orientation of the arc guide.

The present disclosure provides a gas-insulated high or medium voltage circuit breaker including a first arcing contact and a second arcing contact, wherein at least one of the two arcing contacts is axially movable along a switching axis, wherein during a breaking operation, an arc between the first arcing contact and the second arcing contact is formed in an arcing region; a nozzle including a channel directed to the arcing region, for blowing an arc-extinguishing gas to the arcing region during the breaking operation; a diffuser portion adjacent to the nozzle, for transporting the gas from the arcing region to a region downstream of the diffuser portion; a buffer volume directly downstream of the diffuser portion; and an enclosure confined within a housing of the circuit breaker.

The present disclosure provides a gas-insulated high or medium voltage circuit breaker including a first arcing contact and a second arcing contact, wherein at least one of the two arcing contacts is axially movable along a switching axis, wherein during a breaking operation, an arc between the first arcing contact and the second arcing contact is formed in an arcing region; a nozzle including a channel directed to the arcing region, for blowing an arc-extinguishing gas to the arcing region during the breaking operation; a diffuser portion adjacent to the nozzle, for transporting the gas from the arcing region to a region downstream of the diffuser portion; a buffer volume directly downstream of the diffuser portion; and an enclosure confined within a housing of the circuit breaker.

An electric circuit breaker device includes an igniter provided to a housing, a projectile disposed in a cylindrical space formed in the housing, the projectile being movably formed in the cylindrical space by energy received from the igniter, a conductor piece that is provided to the housing, forms a portion of an electric circuit, includes a cutoff portion to be cut off by the projectile in a portion thereof, and is disposed with the cutoff portion crossing the cylindrical space, an arc-extinguishing region positioned within the cylindrical space, on a side opposite to the projectile prior to actuation of the igniter with the cutoff portion interposed between the arc-extinguishing region and the projectile, and configured to receive the cutoff portion cut off by the projectile, and a coolant material having a fibrous form and disposed in the arc-extinguishing region.

An electric circuit breaker device includes an igniter provided to a housing, a projectile disposed in a cylindrical space formed in the housing, the projectile being movably formed in the cylindrical space by energy received from the igniter, a conductor piece that is provided to the housing, forms a portion of an electric circuit, includes a cutoff portion to be cut off by the projectile in a portion thereof, and is disposed with the cutoff portion crossing the cylindrical space, an arc-extinguishing region positioned within the cylindrical space, on a side opposite to the projectile prior to actuation of the igniter with the cutoff portion interposed between the arc-extinguishing region and the projectile, and configured to receive the cutoff portion cut off by the projectile, and a coolant material having a fibrous form and disposed in the arc-extinguishing region.

A double-pole circuit breaker and a distribution box are provided. The circuit breaker includes a case, a first-pole and a second-pole conductive assembly which are disposed in the case, the first-pole conductive assembly is provided with a first inlet and a first outlet wire terminals and a first contact mechanism, the second-pole conductive assembly is provided with a second inlet and a second outlet wire terminals and a second contact mechanism; the first and the second-pole conductive assembly are crossed each other, and the first and second outlet wire terminals respectively include a first and second outlet terminal seat which are arranged side by side and spaced in a lateral direction, and are exposed the case, and are extended in a longitudinal direction, the first and second contact mechanisms are laterally arranged in the case, and are disposed in a span between the first and second outlet wire terminals.

A double-pole circuit breaker and a distribution box are provided. The circuit breaker includes a case, a first-pole and a second-pole conductive assembly which are disposed in the case, the first-pole conductive assembly is provided with a first inlet and a first outlet wire terminals and a first contact mechanism, the second-pole conductive assembly is provided with a second inlet and a second outlet wire terminals and a second contact mechanism; the first and the second-pole conductive assembly are crossed each other, and the first and second outlet wire terminals respectively include a first and second outlet terminal seat which are arranged side by side and spaced in a lateral direction, and are exposed the case, and are extended in a longitudinal direction, the first and second contact mechanisms are laterally arranged in the case, and are disposed in a span between the first and second outlet wire terminals.