Abb Technology Ag

Ove Albertsson

Lars E Jonsson

Magnus Backman

Per Larsson

Lennart Balgård

Philip C Kjaer

Falah Al-Hosini

Jan Smede

Jan-Anders Nygren Nolemo

An electric switching device for alternating current comprises two branches () connected in parallel in a current path and having each at least two contact members () connected in series. A semiconductor device () is adapted to interconnect the midpoints between the two contact members of each branch. When opening the current path a first contact member () of one, first branch located before said midpoint as seen in the current direction existing is controlled to open and a second contact member () of the second branch located after the midpoint as seen in the current direction is controlled to open for transferring the current to a temporary current path through the semiconductor device. The current path through the switching device is then broken when the semiconductor device is in a blocking state by opening a contact member () of the switching device arranged in the temporary current path.

Electric switching device

Growing community of inventors

Västerås, Sweden

Ove Albertsson