Abb Patent Gmbh

Abb Ag

Alexander Rab

Ralf Weber

Richard Kommert

Patrick Claeys

Wolfgang Dorfeld

Klaus Kling

Jürgen Dipl-Ing Hofmann

Richard Dipl-Ing Kommert

Rainer Dipl-Ing Ludovici

Klaus Dipl-Ing Kling

The invention proposes an electrical service device, in particular line circuit breaker or motor circuit breaker, having a housing having connection means () for the purpose of connecting busbars and/or connection lines on at least one end side, having at least one switching contact having a fixed and a movable switching contact piece, an arc () being produced in an arc prechamber area () between said fixed and movable switching contact pieces in the event of a disconnection, said arc entering a current-limiting arc-quenching device () via arc guide rails. Prechamber plates () are arranged in the region of the arc prechamber area (), return-flow channels () being formed by said prechamber plates () from the arc-quenching device () to the arc prechamber area () between the housing wall () and the prechamber plates (). The housing wall () is provided with cutouts (), which are accessible from the outside, in the region of the prechamber plates (), iron plates () being inserted into said cutouts () for the purpose of creating an AC heavy-duty switching device and permanent magnet plates () being inserted into said cutouts () for the purpose of creating a DC heavy-duty switching device.

Electrical service device having an arc prechamber area, prechamber plates and a current-limiting arc-quenching device

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 ().

Electrical service device having an arc prechamber area, arc guide rails and a current-limiting arc-quenching device

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Walldorf, Germany

Alexander Rab