Thermal magnetic circuit breakers

摘要

A thermomagnetic circuit breaker in a preformed housing (11) comprises a display means (53,55,70,72) for selective display of the reasons for tripping. Tripping bars (42,43), actuable independently of one another, include a release function as well as a display function. Alternatively, display may take place with additional trip levers. Combinations of independently actuable tripping bars and an operating handle (13) provide a display means for display of an overload, momentary, ground leak or accessory trip condition. <IMAGE>