Hitachi Energy Ltd

Hitachi Energy Switzerland Ag

Abb Power Grids Switzerland Ag

Abb Schweiz Ag

Daniel Over

Lukas Zehnder

Martin Seeger

Patrick Stoller

Nitesh Ranjan

Bernardo Galletti

Arthouros Iordanidis

Jan Carstensen

Emmanouil Panousis

Markus Bujotzek

Branimir Radisavljevic

Valeria Teppati

Joerg Lehmann

Mahesh Dhotre

Angelos Garyfallos

Saskia Scheel

Michael Schwinne

Christoph Reutlinger

Charles Doiron

Jörg Lehmann

Saskia Buffoni

Philipp Simka

Vincent Dousset

Franceso Pisu

Stefan Arndt

The present invention relates to a dielectric-insulation or arc-extinction fluid for an apparatus for the generation, the transmission, the distribution and/or the usage of electrical energy, the fluid being a mixture comprising a fluoroolefin and oxygen. According the fluoroolefin is a monohydrofluoroolefin containing from 4 to 5 carbon atoms, the hydrogen atom being bound to a carbon atom of the double bond or directly adjacent to the double bond.

Dielectric-insulation or arc-extinction fluid

The present disclosure provides a gas-insulated high or medium voltage circuit breaker including a first arcing contact and a second arcing contact, wherein at least one of the two arcing contacts is axially movable along a switching axis, wherein during a breaking operation, an arc between the first arcing contact and the second arcing contact is formed in an arcing region; a nozzle including a channel directed to the arcing region, for blowing an arc-extinguishing gas to the arcing region during the breaking operation; a diffuser portion adjacent to the nozzle, for transporting the gas from the arcing region to a region downstream of the diffuser portion; a buffer volume directly downstream of the diffuser portion; and an enclosure confined within a housing of the circuit breaker.

Gas-insulated high or medium voltage circuit breaker

The present disclosure provides a gas-insulated high or medium voltage circuit breaker including a first arcing contact and a second arcing contact, wherein at least one of the two arcing contacts is axially movable including a first and a second state of motion along a switching axis, wherein during a breaking operation, an arc between the first arcing contact and the second arcing contact is formed in an arcing region; a nozzle including a channel directed to the arcing region, for blowing an arc-extinguishing gas to the arcing region during the breaking operation; a diffuser adjacent to the nozzle, for transporting the gas from the arcing region to a region downstream of the diffuser; a buffer volume directly downstream of the diffuser, and an enclosure substantially surrounding the buffer volume circumferentially.

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Klingnau, Switzerland

Daniel Over