Abb Schweiz Ag

Hitachi Energy Switzerland Ag

Abb Research Ltd.

Abb Technology Ag

Hitachi Energy Ltd

Abb Power Grids Switzerland Ag

Reto Karrer

Olaf Hunger

Martin Seeger

Nicola Gariboldi

Francesco Pisu

Helmut Heiermeier

Xiangyang Ye

Bernardo Galletti

Jakub Korbel

Jadran Kostovic

Sami Kotilainen

Lorenz Herrmann

Timothy Sutherland

Alexey Sokolov

Mahesh Dhotre

Charles Doiron

Manuel Gotti

Brant Suhrie

Luca Lienhard

Johan Karl Filip Costyson

Riccardo Bini

Henrik Dahlgren

Giang PhamVan

Rijo-Jude Raphael

Johan Costyson

Franceso Pisu

A gas-insulated high or medium voltage circuit breaker comprising: a first arcing contact and a second arcing contact, wherein at least one of the two arcing contact 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 a arcing region; a buffer housing defining a pressurizing volume; a nozzle arranged at a nozzle side of the pressurizing volume, the nozzle defining a channel connected to the pressurizing volume and directed to the arcing region, for blowing an arc extinguishing gas towards the arcing region during the breaking operation, the nozzle comprising a nozzle front face facing towards the interior of the pressurizing volume.

Nozzle for high or medium voltage circuit breaker

An electric switching device filled with a dielectric insulating medium includes first and second arcing contact, first exhaust volume downstream of first arcing contact and second exhaust volume downstream of second arcing contact. The exhaust volumes includes several first openings in their walls, through which the insulating medium exits into third volume. The third volume is arranged around the first or second exhaust volume and is radially delimited by the wall of the exhaust volumes and by an exterior wall having second openings through which the insulating medium exits the third volume. One baffle device is provided inside third volume such that vortex flow of the insulating medium is generated when it passes the baffle device on its way towards the second openings. Turbulent flow conditions are chosen such that gravitational force allows to trap or contributes to trap particles in the baffle device. The baffle device comprises baffle plates or fins, that are arranged to form cavities for capturing the particles by gravitational force.

Electrical circuit breaker device with particle trap

An electrical switching device for medium or high voltage circuits having at least a nominal contact arrangement, wherein the nominal contact arrangement includes at least a first nominal contact including a plurality of contact fingers forming a finger cage concentric with respect to a longitudinal axis, wherein the contact fingers are separated from one another by empty slots extending up to a free end of the contact fingers. The empty slots include first and second empty slots, wherein the second empty slots are shorter than the first empty slots, and wherein the contact fingers are grouped in groups, with the contact fingers of each group being separated by second empty slots and the contact fingers of adjacent groups being separated by first empty slots.

Electrical medium or high voltage switching device

A contact arrangement has a longitudinal axis and includes a first contact group with a first contact and a second contact and a second contact group with a third contact and a fourth contact. The first contact interacts electrically and mechanically with the third contact, and/or the second contact interacts electrically and mechanically with the fourth contact, for closing and opening the contact arrangement. At least one mechanical coupling is provided for transmitting an actuation force to the second contact group and thereby moving the second contact group. The at least one mechanical coupling is adapted to move the third and the fourth contact in such a way that their speeds differ along at least a portion of a travel path of the third contact or along at least a portion of a travel path of the fourth contact.

Electrical switching device with a triple motion contact arrangement

Growing community of inventors

Stäfa, Switzerland

Reto Karrer