An electromagnetic contactor includes: a box-shaped arc extinguishing wall which is arranged in a housing and in which a pair of fixed contacts and a movable contact are arranged; first and second arc extinguishing spaces provided on one side and the other side of the movable contact in its longitudinal direction, the first and second arc extinguishing spaces being spaces surrounded by the arc extinguishing wall; a pair of arc extinguishing permanent magnets arranged to face each other and configured to extend a first arc generated between the first fixed contact point and the first movable contact point in the first arc extinguishing space and to extend a second arc generated between the second fixed contact point and the second movable contact point in the second arc extinguishing space; a first opening provided in a wall portion of the arc extinguishing wall which wall portion is on a side toward which the first arc is extended; and a second opening provided in a wall portion of the arc extinguishing wall which wall portion is on a side toward which the second arc is extended.

Disclosed are a direct current relay and a manufacturing method therefor. A movable contact part provided in a direct current relay comprises a movable contact and a lower yoke positioned below the movable contact configured to attenuate an electromagnetic repulsive force generated by contact between the movable contact and a fixed contact. The movable contact is provided with a coupling protrusion portion that protrudes downward. The lower yoke is provided with a movable contact coupling portion into which the coupling protrusion portion is inserted. The coupling protrusion portion can receive pressure directed radially outward after being inserted into the movable contact coupling portion. The coupling protrusion portion is expanded radially outward by the pressure. Accordingly, the outer circumferential surface of the coupling protrusion portion can be inserted into and coupled to the inner circumferential surface of the lower yoke that forms the movable contact coupling portion.

A switch apparatus having pyrotechnic actuator includes a itch body and the pyrotechnic actuator. The switch body includes a static contact part which is fixed and a movable contact part which is movable. The pyrotechnic actuator is an independent modular construction and is fixedly mounted on the switch body from the outside of the switch body. The pyrotechnic actuator can ignite gunpowder to generate an explosive impact force that pushes the movable contact part away from the static contact part according to the load condition of the switch body, so as to assist the switch apparatus to be quickly disconnected.

A contactor movable contact assembly includes a driving shaft having a shoulder, a movable contact movably installed axially on the driving shaft and positioned above the shoulder, a spring component axially compressed between the shoulder of the driving shaft and the movable contact, and an insulator fixed on the driving shaft and electrically isolating the driving shaft from the movable contact. The driving shaft drives the movable contact from an opened position electrically separated from a static contact to a closed position electrically in contact with the static contact. The spring component applies a predetermined contact pressure on the movable contact to ensure reliable electrical contact between the movable contact and the static contact. A portion of the driving shaft between the shoulder and an upper end of the driving shaft is completely wrapped in the insulator to increase a creepage distance between the driving shaft and the movable contact.

An electromagnetic switch includes a pair of fixed contacts disposed and fixed in a contact housing case with a predetermined distance therebetween; a movable contact disposed in the contact housing case so as to contact and separate from the pair of fixed contacts; and an electromagnet unit which brings the movable contact into and out of contact with the pair of fixed contacts. The electromagnet unit has a magnetic yoke enclosing an exciting coil, a movable plunger having a contact pole surface facing the contact pole surface of the magnetic yoke, and a linking shaft which links the movable plunger and the movable contact, and magnetic paths through which a holding force is generated by external magnetic fluxes generated by a flowing current when the movable contact contacts the pair of fixed contacts, are formed on the contact pole surface of the magnetic yoke.

A high voltage relay device according to the present invention includes fixed contacts, a movable contact provided at one side of the fixed contacts and contactable with or separated from the fixed contacts, fixed-side arc electrodes coupled to the fixed contacts, and a movable-side arc electrode coupled to one side of the movable contact and contactable with or separated from the fixed-side arc electrodes when the movable contact is brought into contact with or separated from the fixed contacts, whereby a generation of arc from primary electrodes when current flows and is cut off can be prevented so as to enhance reliability of the primary electrodes, and also usage of specialized materials may result in reduction of material costs.

Electrical switching devices that can have a housing cup having an opening and a header covering and making a seal with said cup. Internal components are included within the housing, with the internal components configured to change the state of the switching device from a closed state and an open state in response to input. The closed state allows current flow through said device and the open state interrupts current flow through said device. A plurality of fixed contact are included that are electrically connected to said internal components for connection to external circuitry, wherein the fixed contact pass though the header with a portion exposed above the header. A plurality of glass/ceramic eyelets are included, each of which is mounted to a respective one of the fixed contacts on the exposed portion of its one of the fixed contacts. Each of the eyelets can be radially symmetric about its one of the fixed contacts, with the eyelets covering less than all of the header.

In an embodiment a switching chamber for a switching device includes at least a switching chamber base having, on an inner side facing an interior of the switching chamber, a bottom surface with a web structure, which projects out of the bottom surface into the interior.

The invention relates to a switching device which has two stationary contacts and a movable contact in a switching chamber. The stationary contacts are arranged next to each other along a longitudinal direction, and the switching chamber has a switching chamber wall with opposing transversal lateral wall parts and opposing longitudinal lateral wall parts. Each of the two stationary contacts is arranged at a distance to one of the transversal lateral wall parts, said distance being shorter than the respective distance to the longitudinal lateral wall parts.

In an embodiment a switching device includes at least one fixed contact projecting into a switching chamber, wherein the at least one fixed contact has a mounting part and a connection part, and wherein the mounting part is attached to the switching chamber.