Gas-insulated electrical switchgear for medium and high-voltage electrical distribution networks that allows configuring different electrical diagrams and that basically consists of a first gas-insulated enclosure (1) and is equipped with at least one electrical connection means (2, 3) and at least one mechanical connection means (4), a second enclosure (11) housed inside the first enclosure (1) and an operating means (5) integrated inside a second enclosure (11) which in turn comprises a gas breaking switch, an actuating element (8) configured to actuate the operating means (5) that performs the functions of breaking, making, disconnecting and grounding, and an operating mechanism (9) to produce actuation of the actuating element (8).

A switch includes an insulating base having an upper surface and an assembly having a mounting surface. The assembly configured to be arranged on the insulating base, the assembly having a lower surface, the assembly being configured to be arranged on the upper surface of the insulating base with an open space between the lower surface of the assembly and the upper surface of the insulating base. The switch further includes a plurality of fixed contact units mounted in an aligned arrangement on the mounting surface of the assembly and a movable contactor mounted to move within the bore of the insulating body and the electrical contacts of the plurality of fixed contact units.

A switch includes an insulating base having an upper surface and an assembly having a mounting surface. The assembly configured to be arranged on the insulating base, the assembly having a lower surface, the assembly being configured to be arranged on the upper surface of the insulating base with an open space between the lower surface of the assembly and the upper surface of the insulating base. The switch further includes a plurality of fixed contact units mounted in an aligned arrangement on the mounting surface of the assembly and a movable contactor mounted to move within the bore of the insulating body and the electrical contacts of the plurality of fixed contact units.

A circuit breaker system has an SF6 tank having a wall, and an SF6 heating system. The SF6 heating system includes a heater disposed externally of the tank, and a radiator disposed on the wall inside the SF6 tank. The radiator is thermally coupled to the heater via the wall. The heating system is constructed to conduct heat from the heater through the wall to the radiator. The radiator is constructed to radiate the heat to the SF6 in the tank. A circuit breaker system has an SF6 tank having a wall, and a particle trap. The particle trap has a spar extending radially inward from the wall and a wing extending outward from each side of the spar. Each wing is spaced apart from the wall and forms a region having no electric field at the bottom of the tank adjacent the spar.

An electric switching device may include at least two conductor elements that can be placed at a distance from one another and contacted with each other using a moving mechanism, and a housing that defines a circuit breaker chamber, wherein the housing is made of an insulator, and at least partly surrounds the conductor elements. At least one face of the housing may have a resistive coating made of a matrix material filled with a filler, wherein the coating has a sheet resistance between 10.sup.8 and 10.sup.12 ohm at the operating field strength, and is conductingly connected to the conductor elements.

A switchgear system operable at voltages up to 27 kV includes an enclosure containing atmospheric air and a loadbreak module disposed within the enclosure. The loadbreak module includes a loadbreak module housing made of a solid dielectric material, a vacuum interrupter enclosed within the loadbreak module housing and having a fixed contact and a movable contact, and an interchange electrically connected to the movable contact. The vacuum interrupter is operable to selectively break or establish an electrical pathway between the interchange and a terminal in response to movement of the movable contact relative to the fixed contact. The switchgear system further includes a bushing coupled to the enclosure and a disconnect switch electrically connected in series between the loadbreak module and the bushing. The disconnect switch includes a disconnect switch housing made of a solid dielectric material.

A power distribution switchgear including a housing to which a switch is mounted, housing has an opening, the first and second electric contact connected to a first and second conductors. A rotating operating shaft of inserted into the opening, and an actuator having a first end coupled to the shaft and a second end coupled to the second contact. The actuator and shaft made of an electrically insulating material. The shaft supported in the housing by the actuator member. The interface is located at a distance D from the longitudinal axis Y of the shaft that is longer than a distance d between axis Y and a circumferential edge that delimits the opening.

A power distribution switchgear including a housing to which a switch is mounted, housing has an opening, the first and second electric contact connected to a first and second conductors. A rotating operating shaft of inserted into the opening, and an actuator having a first end coupled to the shaft and a second end coupled to the second contact. The actuator and shaft made of an electrically insulating material. The shaft supported in the housing by the actuator member. The interface is located at a distance D from the longitudinal axis Y of the shaft that is longer than a distance d between axis Y and a circumferential edge that delimits the opening.

A vacuum valve according to embodiments of the present disclosure comprise a prescribed shaped vacuum insulation vessel 1 having openings on its both ends, sealing metal fittings 2,3 configured to seal the openings of the vacuum insulation vessel 1 respectively, and a pair of contact points 5,6 which can be brought into contact or out of contact with each other and is arranged within the vacuum insulation vessel 1, wherein the vacuum insulation vessel 1 includes a base material layer 1c of aluminum oxide, a 1st oxidization promotion layer 1a whose oxygen combination was promoted, which 1st oxidization promotion layer 1a is formed on the inner circumference of the base material layer 1c, and a 2nd oxidization promotion layer 1b whose oxygen combination was promoted, which 2nd oxidization promotion layer 1b is formed on the outer circumference of the base material layer 1c.

A vacuum valve according to embodiments of the present disclosure comprise a prescribed shaped vacuum insulation vessel 1 having openings on its both ends, sealing metal fittings 2,3 configured to seal the openings of the vacuum insulation vessel 1 respectively, and a pair of contact points 5,6 which can be brought into contact or out of contact with each other and is arranged within the vacuum insulation vessel 1, wherein the vacuum insulation vessel 1 includes a base material layer 1c of aluminum oxide, a 1st oxidization promotion layer 1a whose oxygen combination was promoted, which 1st oxidization promotion layer 1a is formed on the inner circumference of the base material layer 1c, and a 2nd oxidization promotion layer 1b whose oxygen combination was promoted, which 2nd oxidization promotion layer 1b is formed on the outer circumference of the base material layer 1c.