Electrical switching device with a thermal release

Details Electrical switching device with a thermal release Electrical switching device with a thermal release

H - Electricity

01

H

H01H 33/08 (2006.01)

Patent

CA 2705897

The invention describes an arc-quenching arrangement (1) for an electrical service switching device (2), with a fixed contact piece (3) a movable contact piece (4), with an arc splitter stack (6) having arc splitter plates (5), each arc splitter plate (5) having a cutout (8) which is open towards the arc formation point (7), has a V-shaped notch and tapers in the form of a funnel in the arc running direction, and the arc being guided into the arc splitter stack (6) via a first arc guide rail (9), which is associated with the fixed contact piece (3), and a second arc guide rail, which is associated with the movable contact piece (4). The first arc guide rail (9) has a first, rectangular section (10), which faces the arc formation location (7), and a second section (11), which adjoins the first section and is in the form of a rectangular trapezium and whose first limb (12) extends at an angle with respect to the mid-longitudinal axis (13) of the first section (10) and away therefrom.

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