Abb Patent Gmbh

Wolfgang Dorfeld

Ralf Weber

Alexander Rab

The invention proposes an electrical service device, in particular line circuit breaker or motor circuit breaker, having a housing having connecting areas and connection means () for the purpose of connecting busbars and/or connection lines on both end sides and, having at least one switching contact having a fixed and a movable contact piece (), an arc () being produced in an arc prechamber area () between said fixed and movable contact pieces () in the event of a disconnection. The arc enters a current-limiting arc-quenching device (), in particular an arc splitter stack, via arc guide rails (), at least one insulating plate () being arranged at the edge of the arc-quenching device (). The insulating plate () is fixed to the end section of an arc guide rail () by means of a fixing clip ().

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Dossenheim, Germany

Wolfgang Dorfeld