The invention relates to the use of a gas as a medium for electrically isolating and/or extinguishing electric arcs, said gas comprising a hexafluorobutene. The invention also relates to an electric device comprising a sealed chamber inside which electric components and said gas are located.

The invention relates to the use of a gas as a medium for electrically isolating and/or extinguishing electric arcs, said gas comprising a hexafluorobutene. The invention also relates to an electric device comprising a sealed chamber inside which electric components and said gas are located.

The present disclosure relates to switchgear. Various embodiments may include medium- or high-voltage switchgear with a gas-tight insulating space. For example, a switchgear may include: a gas-tight insulating space where an insulating gas is kept above atmospheric pressure and two switching contacts in the space. At least one of the contacts may movable with respect to a nozzle. The insulating gas may include a mixture of at least 90% by mass of nitrogen and oxygen or nitrogen and carbon dioxide. The nozzle may include a plastic with at least 65% by mass in total of the elements carbon, nitrogen, and oxygen.

The present disclosure relates to switchgear. Various embodiments may include medium- or high-voltage switchgear with a gas-tight insulating space. For example, a switchgear may include: a gas-tight insulating space where an insulating gas is kept above atmospheric pressure and two switching contacts in the space. At least one of the contacts may movable with respect to a nozzle. The insulating gas may include a mixture of at least 90% by mass of nitrogen and oxygen or nitrogen and carbon dioxide. The nozzle may include a plastic with at least 65% by mass in total of the elements carbon, nitrogen, and oxygen.

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.

The invention relates to an electric arc-blast nozzle for a circuit breaker comprising a middle portion forming a throat defining internally an axial passage for interrupting an electric arc, and two end portions extending on either side of the middle portion and being designed to receive respective arcing contacts and that are movable axially relative to each other.

The middle portion and the two end portions are made of a same dielectric material obtained from a composition consisting of a fluorocarbon polymer matrix and of at least one oxide, the oxide(s) being present in a proportion by weight lying in the range 11% to 50%, relative to the total weight of the composition.

The invention also relates to a circuit breaker including such a nozzle.

A switch comprising an insulator door that allows or disallows power transmission between two or more electrodes. When the insulator door is open, with sufficiently high voltage, an arc forms between the two or more electrodes facilitating transmission of power by means of the arc. When the insulator door is closed, the insulative properties of the insulator door block the path of power transmission.

A switch comprising an insulator door that allows or disallows power transmission between two or more electrodes. When the insulator door is open, with sufficiently high voltage, an arc forms between the two or more electrodes facilitating transmission of power by means of the arc. When the insulator door is closed, the insulative properties of the insulator door block the path of power transmission.

The invention relates to medium- or high-voltage, gas-insulated electrical apparatus (10) comprising: a hermetically sealed chamber (12) filled with a dielectric gas, the gas containing at least one of fluoronitrile, carbon dioxide, dinitrogen or dioxygen; at least two electrical contacts (16, 20) arranged coaxially with a main axis (A) of the chamber (12), of which at least one (20) can move axially inside the chamber (12) between a closed position in which the two contacts (16, 20) are in electrical contact with one another and an open position in which the contacts (16, 20) are located at a distance from one another; and a cut-off mechanism (14) for extinguishing the electric arc that forms between the two contacts (16, 20) as the at least one moving contact (20) moves from the closed position into the open position. The cut-off mechanism is of the rotating arc type.