Arc extinction device for an electric switch, in particular for a protective circuit breaker of the line

摘要

Arc extinction device for an electric switch, comprising a stationary contact part (11), a first guide rail of the arc (15), a movable contact part (12), a second guide rail of the arc (16) on which the arc occurring in the movable contact part (12) can be switched during the opening of the switch, and an arc extinguishing chamber (18) between the rails (15, 16). A loop of the blower (19), in series with the electric arc, comprises a first part (20) located outside the first rail (15), close to the input of the arc extinguishing chamber (18), a second part (21) extending transversely to the arc extinguishing chamber (18), until the second rail (16) and a third part (22) returning along the second rail (16) as far as the first rail (15) which is electrically connected.