Abb Schweiz Ag

Hitachi Energy Ltd

Abb Power Grids Switzerland Ag

Hitachi Energy Switzerland Ag

Mahesh Dhotre

Francesco Agostini

Lukas Zehnder

Stephan Grob

Jean-Claude Mauroux

Martin Seeger

Javier Mantilla

Xiangyang Ye

Bernardo Galletti

Oliver Cossalter

Arthouros Iordanidis

Jakub Korbel

Sami Kotilainen

Francesco Pisu

Emmanouil Panousis

Jadran Kostovic

Joerg Lehmann

Lorenz Herrmann

Helmut Heiermeier

Reto Karrer

Javier Mantilla Florez

Daniel Over

Timothy Sutherland

Christoph Wirth

Charles Doiron

Manuel Gotti

Robert Voss

Matteo Papetti

Johan Costyson

Nils Henrik Furrer

Rijo-Jude Raphael

Fredrik Lundqvist

Johan Karl Filip Costyson

Vincent Dousset

Christoph Koller

Franceso Pisu

Stefan Arndt

Gunnar Andrae

The invention relates to an electrical switching device including a nominal contact arrangement, an arcing contact arrangement defining an arcing volume in which an arc-quenching medium is present, an exhaust system including a first exhaust opening connected fluidly to a tank volume, an exhaust channel for dissipating hot medium from the arcing volume into the tank volume, the exhaust system further including a piston arranged in a compression guide and defining on its side opposed to the arcing volume together with the compression guide a compression chamber. An inlet channel is fluidly connected to the compression chamber and extends to an inlet opening fluidly connected to the tank volume, wherein the inlet channel and the exhaust channel are fluidly separated from each other.

Electrical switching device

A circuit breaker includes: first and second contacts moveable relative to each other along an axis of the circuit breaker between an open and closed configuration and defining an arcing region in which an arc is formed during current breaking operation; a nozzle directing a flow of quenching gas onto the arcing region during current breaking operation, a diffusor downstream of the nozzle for further transporting the quenching gas within the arcing region and/or downstream of the arcing region, and a mechanical swirling device arranged downstream of the nozzle and at least partially in the diffusor for imparting a swirl onto the quenching gas flowing along the diffusor, the mechanical swirling device having an axial overlap with the second contact in the open configuration of the circuit breaker.

Circuit breaker and method of performing a current breaking operation

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 is filled with a dielectric insulating medium comprising an organofluorine compound, in particular a fluoroether, a fluoroarnine, a fluoroketone or a fluoroolefin, and comprises at least an arcing contact arrangement with a first arcing contact and a mating second arcing contact. At least a first intermediate volume is provided downstream from the first arcing contact, and/or at least a second intermediate volume is provided downstream from the second arcing contact. The intermediate volumes are for intermediate pressure enhancement and exhaust gas jet formation for turbulent convective heat transfer to metal walls of the exhaust system. In embodiments, the first and/or second intermediate volume is delimited by at least one moveable wall arranged transversally to the longitudinal axis and shiftable parallel to it by an actuation device.

Growing community of inventors

Brugg, Switzerland

Mahesh Dhotre