A hybrid interrupter member for an electrical circuit, the interrupter member including a static interrupter component and an electromechanical interrupter component. The static component is mounted on a support carrying electrical contacts for the static component, the support being configured, on receiving a command to interrupt, to move in such a manner as to withdraw at least one of the electrical contacts from its respective pin, thereby forming the electromechanical interrupter component.

A DC circuit breaker according to various embodiments may comprise: a first terminal unit connected to a power source; and a second terminal unit connected to the first terminal unit and connected to a load, wherein the first terminal unit includes at least a pair of first terminals connected to each other in parallel and connected to the power source, and the second terminal unit includes at least a pair of second terminals corresponding respectively to the first terminals and connected to each other in parallel so as to be connected to the load.

A DC circuit breaker according to various embodiments may comprise: a first terminal unit connected to a power source; and a second terminal unit connected to the first terminal unit and connected to a load, wherein the first terminal unit includes at least a pair of first terminals connected to each other in parallel and connected to the power source, and the second terminal unit includes at least a pair of second terminals corresponding respectively to the first terminals and connected to each other in parallel so as to be connected to the load.

Disclosed herein are efficient mechanical fuse devices that are capable of functioning at high current levels. These devices comprise mechanical features configured such that the fuse devices have a non-triggered state, which allows current to flow through the device, and a triggered state, which does not allow current to flow through the device. In some embodiments, the devices are configured such that a certain pre-determined current level flowing through the device will generate a sufficient electromagnetic field to cause the mechanical elements to transition the fuse device into the triggered state and thus interrupt a connected electrical circuit, device or system. In some embodiments, these devices can also comprise hermetically sealed components. In some embodiments, the fuse devices can comprise pyrotechnic features.

A short-circuit shutdown switch is disclosed having a load current path and a cutting plunger. The load current path has a separating member with a first predetermined cutting zone, a second predetermined cutting zone, and a central section positioned between the first predetermined cutting zone and the second predetermined cutting zone. The cutting plunger is positioned to cut the first predetermined cutting zone and the second predetermined cutting zone.

A contact unit for a switching device includes: a first fixed contact; a second fixed contact; a contact bridge; a first movable contact and a second movable contact that are arranged at the contact bridge; a first arc extinguishing chamber, a second arc extinguishing chamber, and a third arc extinguishing chamber; and an arc guiding system. The first fixed contact is in contact with the first movable contact and the second fixed contact is in contact with the second movable contact in a switched-on state of the contact unit. The first fixed contact is free of contact with the first movable contact and the second fixed contact is free of contact with the second movable contact in a switched-off state of the contact unit. The first and the second arc extinguishing chamber and the arc guiding system in coordination with each other extinguish a first arc.

Disclosed embodiments relate to an improved switching or contactor device with high arc extinguishing capabilities industrial and railways applications where a high current must be switched on and off. The switching or contactor device includes, in a casing, a switch base portion including electrical switching means of a low voltage driving portion active on moving contacts; a high voltage portion including the moving contacts driven towards and away from each other with respect to a mutual contact position, said moving contacts being mounted at respective contact ends of a toggle mechanism which is movable by a low voltage driving portion, and a top arc chute extinguishing portion covering the high voltage portion. Hardware is provided in the proximity of the moving contacts to influence an electric arc occurring when currents are switched on and off by the moving contacts moving towards and away from each other.

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 electrical switching device includes: a main contact arrangement including a fixed contact and a movable contact, a plurality of splitter plates, each having a loop structure, the splitter plates being coaxially stacked with respect to their loop structure to form a stack, wherein one splitter plate is a first outermost plate and another splitter plate is a second outermost plate, a first arc runner electrically connected to the second outermost plate and a second arc runner electrically connected to the first outermost plate, the first and second arc runners being configured to direct a main arc from the main contact arrangement to the stack to thereby split the main arc into a plurality of secondary arcs between the splitter plates, and a first drive coil electrically connected to the second arc runner and to the movable contact or to the first arc runner and to the fixed contact.

A contactor includes an housing having a cavity, fixed contacts received in the cavity having mating ends in the cavity, a movable contact movable within the cavity between a mated position and an unmated position and engaging the fixed contacts to electrically connect the fixed contacts in the mated position, and a coil assembly in the cavity operated to move the movable contact between the unmated position and the mating position. The contactor includes an arc suppressor in the cavity. The arc suppressor includes a multi-pole magnet having a first magnet having a first pole and a second magnet having a second pole. The first magnet is integrated with the second magnet in a unitary magnet body.