Patent ID: 8901447
Filing Date: 2014-12-02
Classification: H01H

Abstract:
1. A circuit breaker comprising: a body configured to be filled with a quenching gas; and two contact arrangements which are configured to be moved relative to one another and along a longitudinal axis between an on state in which the contact arrangements are in contact with each other and an off state in which the contact arrangements are not in contact with each other, wherein: the contact arrangements have an arcing contact system and a rated current contact system connected electrically in parallel with the arcing contact system; the rated current contact system has a lower electrical resistance than the arcing contact system, and is configured to permanently carry a rated current flowing in the circuit breaker; one of the contact arrangements comprises inner rated current contacts and outer rated current contacts of the rated current contact system, the inner rated current contacts being configured to overhang the outer rated current contacts in the direction of the longitudinal axis, and the outer rated current contacts coaxially surrounding the inner rated current contacts, wherein the inner and outer rated current contacts are each entirely a unitary contact in both the on and off states, respectively.