FIELD: electricity.
SUBSTANCE: circuit breaker (1) comprises two switching chutes (11a, 11b), each of them containing a single contact breaker of fixed contact (2) with the first contact area (21) and movable conductive contact element (30) with the second contact area (31) in order to set the respective conductive connection between the first and second contact area in on state of the circuit breaker and to separate the first (21) and second contact areas (31) in off state of the circuit breaker (1) and two arc blow-out chambers (4) to blow out electric arc (5). Each electric arc (5) is propagated in direction of one of arc blow-out chambers (4) notwithstanding direction of current in electric arc (5), movable contact elements of switching chutes are set in parallel to direction of magnetic field (M) in switching chutes thus providing progressive motion.
EFFECT: invention relates to circuit breaker ensuring fast, reliable blowing out of arcs notwithstanding direction of current, this circuit breaker is fit for multipole mode of operation.
15 cl, 3 dwg
