FIELD: electrical engineering.
SUBSTANCE: invention relates to low-voltage electrical equipment, in particular to automatic circuit breaker. Automatic circuit breaker comprises at least one outlet hole made in automatic circuit breaker housing and aligned with arc-quenching chamber tail section, at that, discharge outlet space can be shut off by switching device, at that, when switching device is not connected, it occupies outlet space, and when switching device is connected, outlet space is released. In housing of automatic circuit breaker there can be made three outlets leveled with top, middle and bottom of tail part of arc-quenching chamber, respectively, wherein outlet holes are located with equal intervals, and outlet space of outlet hole is aligned with tail part of arc-extinguishing chamber and is made with possibility of overlapping switching device, wherein the breaker housing can have a base and a cover, which are provided with corresponding longitudinal slots, wherein when the base and the cover are installed, the longitudinal slots form three outlet holes, and at least one of them is separated by the breaker parts.
EFFECT: provision of air outlet from automatic circuit breaker.
5 cl, 5 dwg
