Abb Technology Ag

Philippe Häberlin

Philippe Noisette

Yoann Alphand

Marc Blanc

A switch unit for a DC circuit is disclosed, which includes a first switch contact, and a second switch contact, which is movable between a first position, wherein the first switch contact contacts the second switch contact, and a second position, wherein the second switch contact is separated from the first switch contact. A positioning element to position an arc chute on the switch unit, the arc chute comprises a plurality of substantially parallel metal plates, the positioning element arranged to guide an arc, which is created between the first switch contact and the second switch contact, into the arc chute in an arc displacement direction in order to be extinguished. At least one gas emitting element, wherein at an interruption operation of the circuit breaker at its nominal current, the arc between the first switch contact and the second switch contact vaporizes a portion of the gas emitting layer.

Switch unit, method for assembling a switch unit, and circuit breaker for a medium voltage circuit

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

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Troinex, Switzerland

Philippe Häberlin