A breaking device for interrupting current includes an electrically conducting outer member, an electrically conducting inner member arranged radially inside the outer member with respect to a breaking axis and an electrically insulating or semiconducting breaking member arranged radially between the outer member and the inner member with respect to the breaking axis, where the breaking member is arranged to move along the breaking axis from a starting position to a protruding position in which the breaking member protrudes from a space within the outer member for interrupting a current between the outer member and the inner member io and the breaking member includes a first tubular including a first insulating material and a second insulating material, where the first insulating material has a higher wear resistance than the second insulating material.

A breaker is provided which is used for controlling only one current path. The breaker includes a contact assembly, a movable contact and a housing accommodating the contact assembly and the actuating member. The contact assembly includes: a first stationary contact having a first stationary contact portion; a second stationary contact having a second stationary contact portion; and a movable contact having a first movable contact portion and a second movable contact portion which are respectively located at both ends of the movable contact. The actuating member is connected to the movable contact to actuate the movable contact in a first direction to move between an open position and a closed position. A breaker assembly and a contact having the breaker are also provided.

A breaker is provided which is used for controlling only one current path. The breaker includes a contact assembly, a movable contact and a housing accommodating the contact assembly and the actuating member. The contact assembly includes: a first stationary contact having a first stationary contact portion; a second stationary contact having a second stationary contact portion; and a movable contact having a first movable contact portion and a second movable contact portion which are respectively located at both ends of the movable contact. The actuating member is connected to the movable contact to actuate the movable contact in a first direction to move between an open position and a closed position. A breaker assembly and a contact having the breaker are also provided.

An arc chamber for a DC circuit breaker includes an entry side adapted to receive an electric arc, which was generated outside of the arc chamber and which propagates in a forward direction, a plurality of stacked splitter plates, and at least one inhibitor barrier. The at least one inhibitor barrier is arranged on the entry side to inhibit a reverse propagation of the electric arc out of the arc chamber in a reverse direction. DC circuit breaker comprising an arc chamber. Use of an arc chamber with a circuit breaker in a DC electrical system.

A switch includes: a first stationary contact having a first stationary contact point; a second stationary contact having a second stationary contact point; a movable contact having a first movable contact, and a second movable contact point; a first magnet pair defined by magnets having surfaces facing each other, the magnets of the first magnet pair being disposed with the first stationary contact point and the first movable contact point therebetween in such a manner that the magnets of the first magnet pair become farther from each other outwardly; and a second magnet pair defined by magnets having surfaces facing each other, the magnets of the second magnet pair being disposed with the second stationary contact point and the second movable contact point therebetween in such a manner that the magnets of the second magnet pair become farther from each other outwardly.

An electromagnetic relay includes a case, a first fixed terminal including a first fixed contact, a second fixed terminal including a second fixed contact, a movable contact piece including first and second movable contacts, a first magnet, a gas flow path, and a partition member. The case includes an accommodation space and a side wall covering the accommodation space in a first direction. The accommodation space includes a first space where the first fixed contact is disposed and a second space where the second fixed contact is disposed. The first magnet configured to extend a first arc generated between the first fixed contact and the first movable contact in the first direction. The gas flow path is disposed between the side wall and the movable contact piece. The gas flow path includes an inlet communicating with the first space and an outlet communicating with the second space.

A switching device includes: a first terminal contact; a first fixed contact arranged at the first terminal contact; a contact bridge; a contact bridge carrier arranged at the contact bridge and having a barrier; a first movable contact arranged at the contact bridge; a second terminal contact; a second fixed contact arranged at the second terminal contact; a second movable contact arranged at the contact bridge; and a magnetic drive assembly including a coil and an armature, the armature being coupled to the contact bridge. The first fixed contact is in contact with the first movable contact in a switched-on state of the switching device. The first fixed contact is free of contact with the first movable contact in a switched-off state of the switching device. The second fixed contact is in contact with the second movable contact in the switched-on state of the switching device.

A direct current contactor includes a case and two groups of contact components disposed in the case. Each group of contact components includes two moving contacts connected to each other and two fixed contacts. The direct current contactor further includes a drive system configured to drive the moving contacts to move in a direction close to or away from the fixed contacts, so that the moving contacts are connected to or disconnected from the fixed contacts. The case has an arc-extinguishing cavity. A first baffle in the arc-extinguishing cavity divides the arc-extinguishing cavity into a first arc-extinguishing chamber and a second arc-extinguishing chamber. The contact components are respectively located in the first arc-extinguishing chamber and the second arc-extinguishing chamber. In other words, the two groups of contact components are integrated into two arc-extinguishing chambers of one arc-extinguishing cavity and perform connection/disconnection drive by using a single drive system.

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.