A dielectric, including a halogenated olefin having from 2 to 4 carbon atoms, and having a water content of 6000 ppm or less in terms of mass.

Electrical insulation system with low environmental impact for medium- and high-voltage electrical switchgear.

The invention relates to an electrical insulation system comprising two fundamental elements: a) a gaseous medium formed by a mixture of i) one or more non-flammable hydrofluoroolefins with at least 4 carbon atoms and ii) one, two or three carrier gases selected from N2, O2, dry air, helium, CO.sub.2 or mixtures thereof; and b) one or more drying agents.

Electrical insulation system with low environmental impact for medium- and high-voltage electrical switchgear.

The invention relates to an electrical insulation system comprising two fundamental elements: a) a gaseous medium formed by a mixture of i) one or more non-flammable hydrofluoroolefins with at least 4 carbon atoms and ii) one, two or three carrier gases selected from N2, O2, dry air, helium, CO.sub.2 or mixtures thereof; and b) one or more drying agents.

Electrical insulation system with low environmental impact for medium- and high-voltage electrical switchgear.

The invention relates to an electrical insulation system comprising two fundamental elements: a) a gaseous medium formed by a mixture of i) one or more non-flammable hydrofluoroolefins with at least 4 carbon atoms and ii) one, two or three carrier gases selected from N2, O2, dry air, helium, CO.sub.2 or mixtures thereof; and b) one or more drying agents.

Electrical insulation system with low environmental impact for medium- and high-voltage electrical switchgear.

The invention relates to an electrical insulation system comprising two fundamental elements: a) a gaseous medium formed by a mixture of i) one or more non-flammable hydrofluoroolefins with at least 4 carbon atoms and ii) one, two or three carrier gases selected from N2, O2, dry air, helium, CO.sub.2 or mixtures thereof; and b) one or more drying agents.

The present application concerns a medium- or high-voltage equipment including a leaktight enclosure in which there are located electrical components and a gas mixture for providing electrical insulation and/or for extinguishing electric arcs that are likely to occur in the enclosure, the gas mixture including heptafluoroisobutyronitrile, carbon dioxide, and a high content of oxygen

The present application concerns a medium- or high-voltage equipment including a leaktight enclosure in which there are located electrical components and a gas mixture for providing electrical insulation and/or for extinguishing electric arcs that are likely to occur in the enclosure, the gas mixture including heptafluoroisobutyronitrile, carbon dioxide, and a high content of oxygen

Embodiments of the disclosure can include a circuit breaker, comprising an enclosure comprising: arcing contacts movable axially relative to each other, between an open position of the circuit breaker in which the arcing contacts are separated from each other and a closed position of the circuit breaker in which the arcing contacts are in contact with each other; and a gas inlet configured to blow an arc-control gas to interrupt an electric arc during movement of the arcing contacts from the closed position to the open position, wherein the arc-control gas comprises at least 80% of carbon dioxide; wherein the enclosure further comprises an adsorbing material, which adsorbs carbon monoxide after ionization of the carbon dioxide during arcing, said adsorber being a metal-organic framework comprising nickel and/or iron.

In an embodiment a switching device includes at least one stationary contact in a switching chamber containing a gas comprising H.sub.2 and one movable contact in the switching chamber, wherein the switching chamber has a switching chamber wall and a switching chamber base, and wherein the switching chamber at least partially comprises a polymer material configured to release hydrogen when heated.

In an embodiment a switching device includes at least one stationary contact in a switching chamber containing a gas comprising H.sub.2 and one movable contact in the switching chamber, wherein the switching chamber has a switching chamber wall and a switching chamber base, and wherein the switching chamber at least partially comprises a polymer material configured to release hydrogen when heated.

The present invention relates to a device for interrupting non-short circuit currents only, and in particular relates to a disconnector, more particularly high voltage disconnector, or to an earthing switch, more particularly make-proof earthing switch, and further relates to a low voltage circuit breaker. The device comprises at least two contacts movable in relation to each other between a closed state and an open state and defining an arcing region, in which an arc is generated during a current interrupting operation and in which an arc-quenching medium comprising an organofluorine compound is present. According to the application, a counter-arcing component is allocated to the arcing region, the counter-arcing component being designed for counteracting the generation of an arc and/or being designed for supporting the extinction of an arc.

The present invention relates to a device for interrupting non-short circuit currents only, and in particular relates to a disconnector, more particularly high voltage disconnector, or to an earthing switch, more particularly make-proof earthing switch, and further relates to a low voltage circuit breaker. The device comprises at least two contacts movable in relation to each other between a closed state and an open state and defining an arcing region, in which an arc is generated during a current interrupting operation and in which an arc-quenching medium comprising an organofluorine compound is present. According to the application, a counter-arcing component is allocated to the arcing region, the counter-arcing component being designed for counteracting the generation of an arc and/or being designed for supporting the extinction of an arc.