Hitachi Energy Ltd

Abb Power Grids Switzerland Ag

Hitachi Energy Switzerland Ag

Christoph Wirth

Jakub Korbel

Guenter Steding

Mahesh Dhotre

Nils Henrik Furrer

Dominique Kurrus

Rijo-Jude Raphael

Robert Voss

Matteo Papetti

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 medium or high voltage switch including a moveable contact element and a stationary contact element is described. Therein, a moveable-contact guiding portion of the moveable contact element and a stationary-contact guiding portion of the stationary contact element are shaped for establishing a spherical-bearing-type mechanical connection between each other, thereby aligning a center of the moveable-contact guiding portion with a center of the stationary-contact guiding portion while allowing an angular flexion between the moveable and stationary contact elements. Furthermore, at least one of the stationary-contact guiding portion and the moveable-contact guiding portion is electrically insulating.

Medium or high voltage switch having spherical-bearing-type mechanical connection

Growing community of inventors

Pfungen, Switzerland

Christoph Wirth