The present invention relates to an arc chamber to extinguish electric arcs for a contactor with an extinguishing system, a blowing device which blows electric arcs into the extinguishing system, and a plurality of lamellar electric arc extinguishing elements between which flow channels are formed, wherein the flow channels each have a scattering section and wherein the scattering sections of adjacent flow channels are formed with different inclinations so that the blown air is deflected into different directions by the flow channels. The invention further relates to a contactor with such an arc chamber.

A vacuum bulb is provided, including a sealed chamber; two electrical contacts, which move relative to one another, the chamber including a cylindrical body of a dielectric material and closed at ends thereof by two metal covers, each of the two metal covers being connected to one of the two electrical contacts: and a dielectric coating, which covers an outer surface of the chamber, and includes at least two layers, including an overmolding layer of a synthetic material and an intermediate layer of silicone, the intermediate layer being interposed between the outer surface and the overmolding layer, the intermediate layer being discontinuous and localized on metal portions of the chamber so as to cover at least partially an outer surface of the metal portions, and the silicone includes compressible hollow bodies having a skin of a thermoplastic material.

A breaker comprises a static contact, a moving contact, and an arc-extinguishing chamber. A contact surface of an electrical contact of the static contact and an electrical contact of the moving contact and a bottom plane of a base form an acute angle that is located in the first quadrant. The moving contact comprises a conducting rod having a projecting portion, and the electrical contact which is welded on an end surface of the projecting portion in a direction facing the electrical contact of the static contact. A bottom arc-ignition grid plate on the bottom of the arc-extinguishing chamber is arranged lower than the electrical contact of the static contact. A top arc-ignition grid plate on the top of the arc-extinguishing chamber is arranged higher than the maximum position of the electrical contact of the moving contact when the moving contact is opened.

A non-electrical device (40) includes first and second half-housings which are produced in a plastic material, are joined fixedly to one another, define an axis along which a passage for an electrical conductor passes through the first and second half-housings, and delimit between them an internal volume, which is separated from the passage and which surrounds the passage all around the axis. The first half-housing incorporates, by moulding, mechanical reinforcing elements which extend substantially parallel to the axis in the internal volume until they are in contact with the second half-housing.

An arc plate for a circuit breaker includes a body and a magnetic coating that covers an exterior of the body. The magnetic coating is a metal matrix composite including from 80 to 92 volume percentage of a metal that is magnetic, and from 8 to 20 volume percentage of particles. The particles have a higher melting temperature than the metal.

A switch includes a cut-off chamber including a contact of the switch and a fluid outlet, a channel including an inlet open on the fluid outlet of the cut-off chamber, an outlet, a fluid outlet circuit formed by the channel and the cut-off chamber, wherein the channel is elbow-shaped and includes at least two elbow ducts dividing a flow of the fluid by partitions.

A slot motor apparatus for a circuit breaker is disclosed. The slot motor has first and second legs connected by a thin web, and an extending portion extending rearward from the rear faces of the legs. Slot motor-arc plate assemblies having an arc plate assembly received at least partially overtop of the extending portion are also disclosed, as are assemblies having the arc plate assembly received very close to the rear faces of the slot motor legs. Circuit breakers, slot motor-arc plate assemblies, slot motor covers, and methods of operating the slot motor-arc plate assemblies are disclosed, as are other aspects.

A switch pole for a low voltage switching device including an insulating casing defining an internal space with a contact area and an arc extinguishing area of said switch pole, a fixed contact assembly and a movable contact assembly positioned in said contact area and including, respectively, one or more fixed contacts and one or more movable contacts, which can be mutually coupled or uncoupled, and an arc chamber positioned in said arc extinguishing area and including a plurality of parallel arc-breaking plates and a terminal arc-breaking element, which includes a plate portion arranged in parallel to said arc-breaking plates and having one or more through openings and an elongated portion protruding from said plate portion and extending across said arc-extinguishing area, from said plate portion towards said fixed contact assembly.

The disclosure provides a breaking unit including a stationary contact with a contact surface facing a second direction perpendicular to the first direction; a moving contact arranged at the first side of the stationary contact in the second direction and configured to move relative to the stationary contact; a plurality of arc extinguishing grids arranged at the first side of the stationary contact and at intervals along the first direction; an arc extinguishing shield including a first section and a second section, wherein the first section and the second section are connected to partially surround the arc extinguishing grid, with gaps provided between the first section and the arc extinguishing grid, as well as between the second section and the arc extinguishing grid.

A circuit interrupter may include a plurality of mounting components comprised of an insulating material for receiving a first busbar and a second busbar component. A circuit interrupter may include an arc chamber for providing a primary arc path for a current between the first and second busbar components. A circuit interrupter may include a pyrotechnic charge and pusher component located in between the first and second busbar components and the arc chamber. The pusher component may be comprised of an insulating material and can be triggered upon detection of a fault to direct ionized particles or resulting gases toward the arc chamber.