The fixed contact member includes a fixed contact. The movable contact member includes a movable contact and is movable between a position where the movable contact is in contact with the fixed contact and a position where the movable contact is away from the fixed contact. The permanent magnet forms a magnetic field around the fixed contact. The case is for accommodating at least the fixed contact member and the movable contact member. Further, the case includes an accommodation part which is partitioned from an internal space of the case and is for accommodating the permanent magnet through an opening thereof directed to an outside of the case.

A multi-finger circuit breaker includes a moving contact assembly having a carrier body, a first plurality of fixed breaking contacts, a first plurality of movable contacts, a plurality of first fingers, at least one second finger longer in length to a length of a first finger of the plurality of first fingers, a plurality of splitter plates disposed adjacent to the plurality of first fingers and the at least one second finger and a slot motor disposed adjacent to the plurality of first fingers and the at least one second finger. The slot motor is configured to provide a first magnetic field force to amplify a second magnetic field force being applied on the second finger to influence an arc between the first plurality of fixed breaking contacts and the first plurality of movable contacts during a short circuit such that to move the arc away from between the first plurality of fixed breaking contacts and the first plurality of movable contacts and dissipate energy of the arc.

A switch includes a first fixed contact, a second fixed contact, a movable contact, a drive shaft, a first outside yoke, a second outside yoke, a first inside yoke, a second inside yoke, and a permanent magnet. The permanent magnet magnetically couples the first outside yoke, the second outside yoke, the first inside yoke, and the second inside yoke, and produces a magnetic field component in a direction in which the first fixed contact point and the second fixed contact point are aligned, between the first fixed contact point and the first movable contact point and between the second fixed contact point and the second movable contact point.

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.

An electrical switching device including: 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 of splitter plates, wherein one of the splitter plates of the stack of splitter plates is a first outermost splitter plate and another one of the splitter plates of the stack of splitter plates is a second outermost splitter plate, a first arc runner electrically connected to the second outermost splitter plate and a second arc runner electrically connected to the first outermost splitter plate, the first arc runner and the second arc runner being configured to direct a main arc from the main contact arrangement to the stack of splitter plates 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, wherein the first drive coil has a first force increasing coil portion extending in parallel with the first arc runner in a direction towards the splitter plates such that the first force increasing coil portion is able to carry current in the same direction as and in parallel with a main current flow in the first arc runner to increase the magnetic field to thereby increase the Lorenz force applied to the main arc between the first arc runner and the second arc runner, when energised, is configured to create a blowing magnetic field in the stack of splitter plates, causing the secondary arcs to move circumferentially along the loops structures of the splitter plates.

A DC circuit breaker having an arc blowout device according to the present invention comprises: a fixed contact; a movable contact operating so as to make contact with or separate from the fixed contact; an operation part for driving the movable contact; and a blowout device which provides a magnetic field in a direction crossing the arc generated when the movable contact is separated, wherein the blowout device includes: a pair of core plates arranged side by side on both sides of the movable contact and the fixed contact; core rods integrally connected to the core plates, respectively, and having symmetrical shapes to each other; and a blowout coil coupled to one of the core rods.

The invention relates to a pyrotechnic fuse for interrupting an electrical circuit, comprising a body (9), in which an explosive charge is disposed, wherein: the pyrotechnic fuse comprises a hollow cylinder (11), in which a piston (12) is disposed, beneath which a separation claw (13) is disposed, beneath which the conductor (20), which is to be severed, is disposed; the piston (12) and the separation claw (13) are pressed downwards once the pyrotechnic fuse has been triggered, and the separation claw (13) severs the conductor (20) at two points; a quenching substance storage chamber (14) is disposed outside the cylinder (11), which quenching substance storage chamber, as a result of the piston being pressed downwards once the pyrotechnic fuse has been triggered, is opened towards a separation chamber (15) such that the quenching substance moves into the separation chamber.

An arc extinguishing device of a DC circuit breaker is proposed. The arc extinguishing device is provided with electromagnets installed on opposite sides of an arc extinguishing chamber, so as to increase arc resistance, thereby quickly extinguishing an arc. The arc extinguishing device includes: an arc extinguishing chamber installed above contact terminals and provided with an internal space formed open up and down; a plurality of grids installed side by side in the internal space of the arc extinguishing chamber; a cover installed on an upper part of the arc extinguishing chamber, and including a filter for filtering out impurities remaining in an arc which is extinguished in the arc extinguishing chamber; and electromagnets installed on the one side and the other side of the internal space of the arc extinguishing chamber.

An electromagnetic relay has a contact device and an electromagnet device. An electromagnetic relay has stators which are a pair of rod-like members, and a mover. The mover may face the side of the stator. A housing supports the stator and accommodates the mover. A yoke is fixed to the housing so as to face the movable facing surface and contains a soft magnetic material.

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.