AUTOMATIC CIRCUIT BREAKER Russian patent published in 2000 - IPC

FIELD: electrical engineering. SUBSTANCE: circuit breaker has contact system, trip-free mechanism, intermediate lever actuating the trip-free mechanism, calibrating unit, bimetal overcurrent release, and holder for rack coupling releases of separate poles and for member transmitting force developed by bimetal release to intermediate lever. Novelty is that holder is made for mounting force- transmitting member whose stiffness is not worse than that of bimetal release. Force-transmitting member may be made of Group A steel in the form of plate whose length is smaller than that of bimetal release. Force-transmitting member may be built integral with holder, for example, in the form of holder flange. EFFECT: reduced bimetal consumption. 5 cl, 1 dwg