Electrical device with thermal and electromagnetic trigger, such as circuit breaker, thermal relay and the like

摘要

The present invention relates to an electrical appliance with thermal and electromagnetic trigger, such as circuit breaker, thermal relay, motor starter and the like having the thermal trigger (1) and the electromagnetic trigger (2) arranged in series and mechanically coupled with each other through the mediation of an adjustable arm (3) of a bimetal holder (5). The electromagnetic trigger (2) has U-shaped coil (6) holder (8) the open end of which is bridged by an insertion magnetic yoke (9) provided with a projection (10) having the form of a bent nose for a stop contact (11) of a moving switching contact (12). After the bend, the projection (10) passes in the backward skew direction toward the coil (6) holder (8) over to a surface of an arcing strip (7). A fixed insulation flange (31), fitted with an insulation tube and provided inside with a spring-loaded core (14) with an axial adapter (15), is assigned from inside to said magnetic yoke (9) face. Said insulation flange (32) is further provided on its circumference with a stop (16) for an external threaded end (17) of the coil (6), which is connected by means of at least one electrically conducting wire line (18) with the moving switching contact (12), while said coil internal threaded end (19) is conductively connected with an adapter (20) of the bimetal (5) holder (4) adjustable arm (3), or the coil (6) internal threaded end (19) can be provided with an electrically conducting wire line (21) that can be alternatively interconnected with the thermal trigger (1) bimetal (5) system. Between the coil (6) and a bottom bracket (21) of the holder (8) there is disposed an insulating washer (22) having an insulation projection (23) for the outwardly overlapping internal threaded end (19) of the coil (6). Said bimetal (5) holder (4) consists of the adjustable arm (3) that is fixedly attached by its one end (25) to the coil (6) holder (8) bottom bracket (22) and connected at its other free end (26) with a short buckled arm (27) for spot attachment of the bimetal (5) strip from one side and the end of a supply electrically conducting wire line (28) of the supply strip (29) from the other side.