A contact mechanism has a base, a pair of fixed contact terminals provided side by side on the base, a first contact mechanism including a first fixed contact provided in one of the pair of fixed contact terminals, and a first movable contact that contactably and separably faces the first fixed contact, a second contact mechanism including a second fixed contact provided in another of the pair of fixed contact terminals, and a second movable contact that contactably and separably faces the second fixed contact, and a magnetic field generation unit having a permanent magnet disposed between the first contact mechanism and the second contact mechanism such that magnetic fields in opposite directions are generated respectively between contacts of the first contact mechanism and between contacts of the second contact mechanism when currents in opposite directions flow in the first contact mechanism and the second contact mechanism.

A contact mechanism has a base, a pair of fixed contact terminals provided side by side on the base, a first contact mechanism including a first fixed contact provided in one of the pair of fixed contact terminals, and a first movable contact that contactably and separably faces the first fixed contact, a second contact mechanism including a second fixed contact provided in another of the pair of fixed contact terminals, and a second movable contact that contactably and separably faces the second fixed contact, and a magnetic field generation unit having a permanent magnet disposed between the first contact mechanism and the second contact mechanism such that magnetic fields in opposite directions are generated respectively between contacts of the first contact mechanism and between contacts of the second contact mechanism when currents in opposite directions flow in the first contact mechanism and the second contact mechanism.

An electromagnetic relay including: an electromagnet; a movable spring having a movable contact; a first terminal to which one end of the movable spring is connected; a second terminal having a fixed contact opposite to the movable contact; an actuator that rotates by excitation of the electromagnet, rotates the movable spring, and causes the movable contact to come in contact with the fixed contact or to separate from the fixed contact; a nonmagnetic card to be attached to the actuator; a plurality of magnetic members that sandwich the movable contact and the fixed contact, and apply a magnetic flux to the movable contact and the fixed contact to extend an arc; and a permanent magnet attached between the magnetic members.

An electromagnetic relay includes a fixed contact part including a fixed terminal and a fixed contact connected to the fixed terminal, a movable contact part including a movable contact spring and a movable contact connected to the movable contact spring, an armature to which the movable contact part is connected, an electromagnet configured to move the armature, a magnet configured to stretch an arc generated between the fixed contact and the movable contact, and a first arc extinguishing plate and a second arc extinguishing plate configured to extinguish the stretched arc. The fixed contact and the movable contact are disposed between the first arc extinguishing plate and the second arc extinguishing plate. The magnet is disposed between a first pair of the fixed contact part and the movable contact part and a second pair of the fixed contact part and the movable contact part.

A fused disconnect switch device includes a housing defining an interior volume, and a current path. An arc interruption assembly is located in the interior volume and includes a shell, and a conductor in electrical communication with the current path. At least one arc plate is located between the magnets and the conductor. The magnets cooperate to generate a magnetic field facilitating an interruption of a first arc between the conductor and the first side of the arc chamber and a second arc between the conductor and the second side of the arc chamber.

Disclosed is a switch device with at least one contact point and a permanent magnetic arc blowing device which is paired with the contact point, wherein the arc blowing device has at least one second permanent magnet (15) as an auxiliary magnet, and the auxiliary magnet is arranged in the direct vicinity of the contact point (7.1), such that at least one section of the magnetic field (17) of the auxiliary magnet (15) amplifies the blow-out field in the transition region.

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.

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.

A switching device in a vacuum switching tube or for arc quenching in gases. The switching device has an arc-quenching device. There is also described a method for operating a switching device in a vacuum switching tube or in arc quenching in gases, which switching device has an arc-quenching device for medium-voltage, low-voltage and/or high-voltage applications.

An arc quenching system includes an arc-extinguishing unit and an arc-blowing magnetic unit. The arc-extinguishing unit extinguishing an arc discharge produced upon a switching operation of a contact pair from a closed state to an open state. The contact pair having a static contact and a movable contact which is movable relative to the static contact between the closed state and the open state in which the movable contact is spaced apart from the static contact by a gap. The arc-blowing magnetic unit creates a magnetic field having a plurality of magnetic field lines that cross a gap region of the contact pair along a predetermined magnetic field direction. The arc-blowing magnetic unit creates the magnetic field lines with an orientation based on an electrical polarity of the static contact and a positioning of the arc-extinguishing unit to magnetically blow the arc discharge toward the arc-extinguishing unit.