A breaker is provided including: a first stationary contact having a first stationary contact portion; a movable contact having a first movable contact portion; an actuating member to actuate the movable contact; a first arc extinguishing device; a first arc running piece extending from a first arc running end portion arranged adjacent to the first stationary contact portion to a second arc running end portion through the first arc extinguishing device; and an arc guiding piece having a first arc guiding section extending in the first direction, the first arc guiding section being arranged between the movable contact and the first arc extinguishing device in a second direction perpendicular to the first direction. The second arc running end portion and the first arc guiding section are arranged at opposite sides of the first arc extinguishing device in the second direction. A contactor including the breaker is further provided.

A breaker is provided including: a first stationary contact having a first stationary contact portion; a movable contact having a first movable contact portion; an actuating member to actuate the movable contact; a first arc extinguishing device; a first arc running piece extending from a first arc running end portion arranged adjacent to the first stationary contact portion to a second arc running end portion through the first arc extinguishing device; and an arc guiding piece having a first arc guiding section extending in the first direction, the first arc guiding section being arranged between the movable contact and the first arc extinguishing device in a second direction perpendicular to the first direction. The second arc running end portion and the first arc guiding section are arranged at opposite sides of the first arc extinguishing device in the second direction. A contactor including the breaker is further provided.

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.

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 air circuit breaker is disclosed. The air circuit breaker according to an embodiment of the present disclosure includes a cover magnet unit. The cover magnet unit is directly coupled to an upper cover which forms the outer appearance of the air circuit breaker. The cover magnet unit is positioned adjacent to a fixed contact and forms a magnetic field. Due to the formed magnetic field, an electromagnetic force in a direction toward an arc extinguishing unit is applied to a generated arc. Accordingly, the generated arc may be rapidly moved and extinguished. The cover magnet unit is inserted into a surface of the upper cover and is not exposed to the outside. Therefore, the generated arc is not in contact with the cover magnet unit. As a result, the cover magnet unit is not damaged by the generated arc.

The present disclosure relates to an arc extinguishing assembly which, when an arc is generated, has a structure that can push the generated arc in a direction farther away from a stationary contact point by forming a transient pressure difference between arc guides.

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.

The present invention provides an electric circuit breaker device that can be downsized by reducing the distance the moving body moves. A electric circuit breaker device includes: a housing; a part to be cut that is placed inside the housing and forms a part of an electric circuit; and a power source P placed on the side of a first end part of the housing, the electric circuit breaker device further includes a moving body that includes a first arc-extinguishing space X1 in which the part to be cut is inserted and housed, and which is filled with an arc-extinguishing material M, wherein the housing includes a moving body housing part that allows the moving body to move between the first end part and a second end part opposite to the first end part, the moving body is configured to cut the part to be cut housed in the first arc-extinguishing space X1 of the moving body while moving from the first end part toward the second end part by the power source P, and the housing includes an expanded arc-extinguishing space X2 positioned so as to face an end part of a separable piece of the part to be cut that is cut off and separated, when the moving body has moved and stopped, and the expanded arc-extinguishing space X2 being filled with an arc-extinguishing material M.

The present invention provides an electric circuit breaker device that can be downsized by reducing the distance the moving body moves. A electric circuit breaker device includes: a housing; a part to be cut that is placed inside the housing and forms a part of an electric circuit; and a power source P placed on the side of a first end part of the housing, the electric circuit breaker device further includes a moving body that includes a first arc-extinguishing space X1 in which the part to be cut is inserted and housed, and which is filled with an arc-extinguishing material M, wherein the housing includes a moving body housing part that allows the moving body to move between the first end part and a second end part opposite to the first end part, the moving body is configured to cut the part to be cut housed in the first arc-extinguishing space X1 of the moving body while moving from the first end part toward the second end part by the power source P, and the housing includes an expanded arc-extinguishing space X2 positioned so as to face an end part of a separable piece of the part to be cut that is cut off and separated, when the moving body has moved and stopped, and the expanded arc-extinguishing space X2 being filled with an arc-extinguishing material M.