FIELD: electricity.
SUBSTANCE: switching apparatus unit contains a block (4) of breaker with switching interval. The first and second contact elements (5, 6, 7, 8) are provided; they are movable relative to each other. The switching gas channel originates in the switching gap and connects the switching gap with the environment of the interrupter unit. The hollow structure (14) of the chamber delimits the switching gas channel at least in sections and is connected to one of the switching contact elements (6, 8). The hollow structure (14) of the chamber has an outlet (22) on the side of the lateral surface of the switching gas channel.
EFFECT: improved device reliability.
23 cl, 1 dwg
