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.

Embodiments of the present disclosure provide a stationary contact assembly and a corresponding switch contact. The stationary contact assembly comprises: a stationary contact body (21); a stationary contact point (23) placed on the stationary contact body (21); and an arc-guiding member (25) fixed on the stationary contact body (21) and including an arc guiding portion (251), the arc guiding portion (251) comprising a first end (A) and a second end (B) that are opposite to each other, the first end (A) being close to the stationary contact point (23), a direction form the first end (A) to the second end (B) defining a main movement direction (F) of arc. The arc guiding portion (251) of the arc-guiding member (25) comprises an arc-guiding section (2511) at the first end (A), the arc-guiding section is adapted to guide the arc away from the stationary contact point (23) into the arc guiding portion (251), and the stationary contact point (23) is close to or in contact with the arc-guiding section (2511) in the main movement direction (F) of the arc. The stationary contact assembly of the embodiments of the present disclosure has an improved arc-guiding member that can guide the arc to quickly leave the contact point, enhance the mechanical strength of the stationary contact and reduce the production cost of the contact.

The invention relates to a contact unit and to a method for steering electric arcs on a contact unit, in particular for supplying vehicles with power via an overhead wire (20), the contact unit comprising a sliding contact device (19), the sliding contact device having a contact strip support (21) and a contact strip (22) disposed thereon, the contact unit having a steering device (24) for electric arcs (25) which is disposed on the contact unit, the steering device being provided with a magnet (30).

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 electrical switch includes a fixed contact member and a plurality of movable contact fingers that pivot into and out of engagement with the fixed contact member. The electrical switch also includes a fixed magnetic member and a plurality of U-shaped magnetic members housing the plurality of movable contact fingers. Upon occurrence of a fault condition, each of the plurality of U-shaped magnetic members is magnetically pulled towards the fixed magnetic member, without contacting the fixed magnetic member, such that each of the plurality of movable contact fingers is held in engagement with the fixed contact member.

The present invention relates to a switching device comprising at least one contact point, an arc extinguishing chamber assigned to the contact point, and an arc blow device assigned to the contact point. The arc extinguishing chamber comprises an exit opening through which plasma, which is generated inside the switching device by a switch arc developing when the contact point opens, can exit out of the switching device, the exit opening having a clearance dimension and defining an exit plane. The arc blow device is provided for generating a magnetic blow field by which the switch arc developing when the contact point opens is blown away from the contact point towards the exit opening. Furthermore, the switching device comprises at least one first arc guide plate which extends from the contact point to the exit opening and by which the switch arc is guided and stretched on the way from the contact point to the exit opening, wherein the first arc guide plate comprises a first portion and a second portion within the arc extinguishing chamber between the contact point and the exit plane, the first portion of the first arc guide plate being arranged proximal to the contact point, and the second portion of the first arc guide plate being arranged distal to the contact point. According to the invention it is provided that the second portion of the first arc guide plate extends beyond the exit opening in a direction parallel to the exit plane so that the switch arc is stretched by the second portion of the first arc guide plate at least at one end of the switch arc beyond the clearance dimension of the exit opening, wherein an arc guide pin projecting from the second portion of the first arc guide plate is arranged in front of the exit opening, by which arc guide pin the switch arc is again shortened in front of the exit opening.

A high voltage switch system including a circuit interrupter having a first set of contacts in series with a first coil, which are in series with a second coil and a second set of contacts, the first coil wound around a first core and the second coil wound around a second coil such that upon an arc forming between the contacts of the first and second contacts, the arcs are motivated in opposite directions to be extinguished.

Provided is a circuit breaker for a DC current using a magnetic field, which generates a magnetic flux and extinguishes an arc current generated in a main switch. The circuit breaker includes a main switch installed in a DC line, a coil wound so as to generate a magnetic flux in a direction vertical to the direction of an arc current generated when the main switch is opened, a semiconductor switch for switching current application to the coil, a capacitor connected in series to the semiconductor switch, and a first diode for conducting the electric current of the DC line, supplied from one side of the main switch, to the capacitor, wherein the semiconductor switch is turned on, in case a fault occurs, so that the electric current is applied to the coil by the voltage charged in the capacitor.

A DC electrical circuit breaker includes first and second movable electrical contacts. The circuit breaker includes a magnetic circuit including a magnet and generating a magnetic field able to guide an electrical arc in the direction of a quenching chamber, and having for this purpose curved field lines extending perpendicularly to opposite lateral walls of an electrical arc formation chamber, these field lines converging, in a central region of the arc formation chamber containing the contact zones, toward the quenching chamber while extending parallel to the longitudinal plane.

A magnetic shielding structure for a relay contact and a relay are provided, the magnetic shielding structure includes a contact assembly, which includes a movable contact piece and a pair of stationary contact lead-out terminals, which can contact with or separate from each other; an anti-short circuit assembly, which is at least disposed at a side of the movable contact piece along a third direction, and can generate suction force when a faulty high current in the movable contact piece for resisting an electrodynamic repulsion force between the movable contact piece and the stationary contact lead-out terminals; a permanent magnet, which is disposed around the contact assembly to achieve arc extinguishing; a first magnetic shielding member, which is sleeved on the outside of a stationary contact lead-out terminal and blocks the magnetic field transmitted from the permanent magnet to the anti-short circuit assembly.