Patent ID: 7394032

Claim:
A contact system for a power circuit breaker, the contact system comprising: a plurality of fixed contacts disposed across from each other; a breaker shaft segment; a rotary contact bridge pivotably mounted in the breaker shaft segment about a rotation symmetrical axis by means of a bearing axle and a slot bearing having a slot longitudinal axis perpendicular to the bearing axle, the rotary contact bridge configured to electrically connect and disconnect the fixed contacts; two rockers mounted on the rotary contact bridge so as to tilt about a tilting axis with respect to the rotary contact bridge parallel to the rotation-symmetrical axis; and two contact force springs, each having a longitudinal axis and being supported between the breaker shaft segment and one of the rockers, wherein the rotary contact bridge, the breaker shaft segment, the contact force springs, and the rockers form a tilting snap-action mechanism for holding the rotary contact bridge in a repulsed position after the fixed contacts have been electrodynamically repulsed, and wherein the longitudinal axes of the springs, the tilting axes and the rotation-symmetrical axis lie in a tilting point plane of the tilting snap-action mechanism and the slot longitudinal axis forms at most an acute angle with the tilting point plane.