Patent ID: 9147541
Filing Date: 2015-09-29
Classification: H01H

Abstract:
1. A circuit breaker, comprising: a housing, in which a first switchgear region, a quenching chamber apparatus and a contact slide apparatus with moving contact pieces, positioned opposite fixed contact pieces, are arranged; and a second switchgear region, in which a current release group including a short-circuit release and an overload release is arranged, wherein a continuous ventilation channel is formed within opposite walls of the housing along the fixed contact pieces as a first convective air flow through the circuit breaker for heat, and wherein the first convective air flow is formed along the fixed contact pieces through recesses on the contact slide, on the fixed contact pieces and on the covers arranged on the fixed contact pieces, said recesses together forming the continuous ventilation channel which allows heat to be dissipated through openings in the housing.