A switching device including a frame, a first fixed contact member having a first contact area, and a first movable contact member having a first contact arm provided with a contact area. The first movable contact member is adapted to pivot relative to the frame around a first pivoting axis between a first position and a second position. The switching device includes a spreader member that is adapted to provide a first intermediate position for the first movable contact member in which a projection of the contact area of the first contact arm overlaps at least partially with a projection of the first contact area on a switch plane perpendicular to the first pivoting axis while the contact area of the first contact arm is spaced apart from the first contact area.

A vehicle circuit breaker includes a housing configured with a electrode assembly including a first electrode and second electrode; the first electrode is configured with a first conducting element and first insertion portion, and the second electrode is configured with an electrode connection portion and second insertion portion; a bimetal conducting sheet and blocking element are configured inside the housing, where the bimetal conducting sheet has a plurality of conducting concave portions for the installment of a second conducting element and the connection with the electrode connection portion, thereby carrying out a blocking action when current is abnormal and therefore making it easier for assembly.

An electrical contactor system includes a stationary contactor having a stationary contact, a moving contactor having a moving contact, a rotating member, a magnetic blow-out arc quenching device including a permanent magnet, and an isolation arc quenching device. The moving contactor is mounted on the rotating member and is rotatable between a connected position and a disconnected position. The moving contact is in electrical contact with the stationary contact when the moving contactor is rotated to the connected position, the moving contact is separated from the stationary contact when the moving contactor is rotated to the disconnected position. The permanent magnet is statically disposed in a vicinity of the stationary contactor for elongating an arc between the stationary contact and the moving contact by an electromagnetic force so as to extinguish the arc. The isolation arc quenching device pushes the arc toward the permanent magnet so as to force the arc to move to a vicinity of the permanent magnet.

The present disclosure relates to an arc extinguishing unit of a molded case circuit breaker with a barrier provided between a fixed contact and a movable contact when a circuit is cut off. The arc extinguishing unit includes fixed contacts fixed to part of a base assembly case; movable contacts that contact or are separated from the fixed contacts; and an arc extinguishing part that extinguishes an arc generated when the movable contacts are separated from the fixed contacts. The arc extinguishing part includes a pair of side plates; multiple grids installed at a fixed interval between the side plates; and arc barriers each rotatably installed on the side plates, and configured to open between the movable contacts and the fixed contacts by being rotated when a current flows on the circuit, and to close between the movable contacts and the fixed contacts when the current is cut off.

The present disclosure relates to a molded case circuit breaker, and more particularly, to a contact unit of a molded case circuit breaker. A molded case circuit breaker according to an embodiment of the present disclosure may include a fixed contact; a movable contact rotatably provided on a shaft body to be brought into contact with or separated from the fixed contact; and an insulating barrier that enters between the fixed contact and the movable contact during interruption, wherein the insulating barrier is coupled to the movable contact to rotate along a circumferential surface of a shaft body.

A circuit protection device includes: a housing (102) defining a cavity (130); a metal oxide varistor (110) disposed within the cavity; a movable electrode (122) attached to a first side of the metal oxide varistor by a solder connection (140); an arc shield (114) disposed within the housing on the first side of the metal oxide varistor and adjacent to the movable electrode; and a spring (120) attached to the arc shield, wherein the arc shield is mechanically biased against the movable electrode along a surface direction parallel to the first side when the spring is in a compressed state. The device is easy to assemble in lower cost and provides fast response to overheating caused by a fault condition.

A circuit protection device includes: a housing (102) defining a cavity (130); a metal oxide varistor (110) disposed within the cavity; a movable electrode (122) attached to a first side of the metal oxide varistor by a solder connection (140); an arc shield (114) disposed within the housing on the first side of the metal oxide varistor and adjacent to the movable electrode; and a spring (120) attached to the arc shield, wherein the arc shield is mechanically biased against the movable electrode along a surface direction parallel to the first side when the spring is in a compressed state. The device is easy to assemble in lower cost and provides fast response to overheating caused by a fault condition.

A switch blocking device that is insertable into an open switch that prevents the switch from being closed, the device being sized and shaped to fit securely in a space between an open blade of the switch and fixed electrical contacts of the switch, the device having a handle that enables easy insertion and removal while also covering the live electrical blade.

A high-voltage large-current relay includes an electromagnet, at least one fixed transmission contact, at least one movable transmission contact, at least one fixed arc-striking contact, and at least one movable arc-striking contact. The fixed transmission contact and movable transmission contact are corresponsive to each other, and the fixed arc-striking contact and movable arc-striking contact are corresponsive to each other. The relay further includes at least one arc-striking spring plate and at least one transmission spring plate for installing the movable transmission contact and movable arc-striking contact respectively. The movable arc-striking contact is smaller than the movable transmission contact, and the arc-striking spring plate and the transmission spring plate are operated together. Before the electromagnetic effect of the electromagnet drives the movable transmission contact and fixed transmission contact into an open or closed state, the movable arc-striking contact and fixed arc-striking contact are contacted with each other.

A high-voltage large-current relay includes an electromagnet, at least one fixed transmission contact, at least one movable transmission contact, at least one fixed arc-striking contact, and at least one movable arc-striking contact. The fixed transmission contact and movable transmission contact are corresponsive to each other, and the fixed arc-striking contact and movable arc-striking contact are corresponsive to each other. The relay further includes at least one arc-striking spring plate and at least one transmission spring plate for installing the movable transmission contact and movable arc-striking contact respectively. The movable arc-striking contact is smaller than the movable transmission contact, and the arc-striking spring plate and the transmission spring plate are operated together. Before the electromagnetic effect of the electromagnet drives the movable transmission contact and fixed transmission contact into an open or closed state, the movable arc-striking contact and fixed arc-striking contact are contacted with each other.