Abb Technology Ag

Marc Blanc

Philippe Noisette

Yoann Alphand

Philippe Häberlin

A switch unitfor a voltage circuit breaker that includes a first switch contactand a second switch contact. The first switch contactis movable between a first position in which the first switch contactcontacts the second switch contact and a second position in which the first and second switch contactsare separated from each other. Further, a positioning element to position an arc chuteon the switch unit. The arc chuteincludes at least two stacksof a plurality of substantially parallel metal plates. The switch unit includes a first connection devicecapable to electrically connect the first switch contactto a predetermined metal plateselected of the most proximal 25% metal plates of the first stack. A second connection devicecapable to electrically connect the second switch contact to a predetermined metal plateselected of the most proximal 25% metal plates of the second stack

Switch unit and circuit breaker for a medium voltage circuit

An arc chute for a DC circuit breaker is disclosed which includes at least one stack of a plurality of substantially parallel metal plates, the at least one stack defining a first axis A in parallel to a stacking direction; an arc space adapted to allow an arc to extend along the first axis, wherein a second axis traversing in parallel to the metal plates the at least one stack and the arc space substantially orthogonal to the first axis. Further, an arc-chute housing having at least one side wall, the at least one side wall being substantially parallel to the second axis, wherein the distance between the at least one sidewall and the metal plates is, for example, less than 5 mm, such as less than 2 mm.

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Lausanne, Switzerland

Marc Blanc