Automatic circuit breaker for electricity supply has bimetal inducing thermal trigger when supercharges reach certain level, and magnetic section inducing magnetic trigger when supercharges are higher

摘要

Circuit breaker comprises independent mechanism but working together, for neutral pole and for each electric phase used. Mechanism of each phase comprises circuit with magnetic section, placed in series with parallel part made with calibrating mechanism and bimetal (15) able to react in function of intensity. Bimetal induces thermal trigger that opens mechanism when over-intensities reach pre-determined values, while magnetic section induces magnetic trigger when over-intensities are higher.