A DC voltage switch for high-voltage on-board electrical systems having a housing, at least two stationary contacts, and a moving contact, wherein, in each case, a first contact region of the stationary contacts is routed out of the housing and, in each case, a second contact region of the stationary contacts is arranged in a switching chamber of the housing with the moving contact, wherein the housing is hermetically encapsulated, wherein a cooling chamber which is separated from the switching chamber by a partition wall is arranged above the switching chamber, wherein the partition wall has at least one outlet opening and at least one inlet opening.

A switch of nonmetallic macromolecular conductive material being water-resistant and resistant to oxidation includes a circuit board having electronic circuitry and a plurality of electrical contact assemblies on a top surface; and a plurality of elastic members mounted on the circuit board and each including a bottom opening, and a stem on a bottom of a top extending downward toward the bottom opening. Each electrical contact assembly is surrounded by the elastic member and the circuit board. An electrically conductive member made of nonmetallic macromolecular conductive material is formed on a bottom of the stem. An electrical contact made of nonmetallic macromolecular conductive material is formed on each electrical contact assembly. A process of manufacturing same is also included.

There is provided a contact switching device which has high productivity and in which operation characteristics hardly vary. The contact switching device includes an electromagnetic unit, a holder, a movable shaft, a movable yoke, a movable contact piece having movable contacts at both ends, fixed contacts, and a fixed yoke. At the time of excitation of the electromagnetic unit, the movable shaft moves to the holder side along a direction of an axis center. A magnetic circuit is formed of the fixed yoke and the movable yoke due to a magnetic field generated by a current that flows into the movable contact piece as a result of the movable contacts coming into contact with the fixed contacts. The movable yoke is then attracted to the fixed yoke.

Circuit interrupting devices, power distribution switchgear assemblies, and pole units for power distribution are provided. A circuit interrupting device includes a solid insulation housing, a disconnect, a window, and an insulating fluid. The solid insulation housing defines a first external opening and a first cavity extending into the solid insulation housing from the first external opening. The disconnect has a moving contact in selective engagement with a stationary contact in the first cavity. The window is secured to the solid insulation housing at the first external opening. The insulating fluid is disposed within the first cavity. The window, the solid insulation housing, or a combination thereof is configured to form a trap region that is in fluid communication with the first cavity and is configured to trap air bubbles in the insulating fluid.

A pole assembly housing for a miniature circuit breaker is structured to lessen pressure and temperature increases within the housing increase due to arcing gas. The housing includes an exhaust compartment, which includes an arc chamber where the separable contacts of the circuit breaker are located and an exhaust channel with a first end and a second end. The channel's first end is in fluid communication with the arc chamber and the second end is a vent opening in fluid communication with the environment external to the housing. The channel has a diverging shape such that the first end is the narrowest portion, and the channel widens between the first end and the vent opening. Multiple ribs are formed on the sidewall in the arcing chamber, and more ribs are formed on the walls surrounding the exhaust channel cool arcing gas and reduce pressure of the arcing gas.