Circuit breaker protection against low voltage sources having intermediate/lower container with fixed/moving contact with transmission gas holes with pressure increasing/walls flexing during switching allowing arc escape.

摘要

The circuit has an intermediate container (1) and lower container (2) having a fixed contact (3) and moving contact (17). The lower container has transmission gas holes (21). A thin part (35) is formed in the walls of the lower container. The front and rear walls a re curved towards the outside by an internal pressure which increases when the current is switched, allowing the gas arc to escape from the lower container to the outside.