ARC BLOW-OUT CIRCUIT BREAKER Russian patent published in 2016 - IPC H01H9/44 

FIELD: electricity.

SUBSTANCE: invention presents and arc blow-out circuit breaker with fast and polarity-independent arc blow-out and heat protection of the bridge circuit. The circuit breaker comprises at least two fixed contacts (2) with to contact areas and at least one movable electroconductive bridge contact (3) with the other two areas of contact (31, 32), at least one magnet (71, 72) intended for generation of permanent magnetic field (M) in essence at the section of the first and second contact areas for impact with magnetic force (F) on electric arc (51, 52) occurring between the first and second areas of contact when cutoff state is set, two first arc blow-out chambers (41, 42). The movable bridge contact (3) comprises two bridge plates (81, 82), which for the purpose of arcs (51, 52) blowing-out pass with the second direction of current opposite to the first direction of current from the bridge contact (3) along the axis (BA) of bridge contact (3) movement.

EFFECT: improved design.

12 cl, 3 dwg