Patent ID: 8173926

Claim:
An arc-quenching arrangement for an electrical service switching device with a fixed contact piece, comprising: a movable contact piece; an arc splitter stack, having arc splitter plates, each arc splitter plate having a cutout, which is open towards an arc formation point which has a V-shaped notch and tapers in the form of a funnel in an arc running direction; a first arc guide rail, which is associated with the fixed contact piece and which guides an arc into the arc splitter stack, comprising: a first, rectangular section, which faces the arc formation location, and a second section, which adjoins the first section and is in a form of a rectangular trapezium, the second section including a first limb that extends at an angle with respect to a mid-longitudinal axis of the first section and away therefrom; and a second arc guide rail, which is associated with the movable contact piece.