Abstract: An assembly device is disclosed for fixing a molded case circuit breaker, including a housing with at least one screw hole for a fixation screw for fixing the molded case circuit breaker to a bus bar. The assembly device includes a screw head holding device for holding a screw head of the fixation screw, the assembly device being configured to be arranged inside a cavity of the housing of the molded case circuit breaker in such a way that a screw head of a fixation screw arranged at the screw hole for mounting the molded case circuit breaker to the bus bar is engageable with the screw head holding device in an engagement direction. Furthermore, a circuit breaker system is disclosed including a molded case circuit breaker and an assembly device. Moreover, a method is disclosed for mounting a molded case circuit breaker to a bus bar.

Abstract: An assembly device is disclosed for fixing a molded case circuit breaker, including a housing with at least one screw hole for a fixation screw for fixing the molded case circuit breaker to a bus bar. The assembly device includes a screw head holding device for holding a screw head of the fixation screw, the assembly device being configured to be arranged inside a cavity of the housing of the molded case circuit breaker in such a way that a screw head of a fixation screw arranged at the screw hole for mounting the molded case circuit breaker to the bus bar is engageable with the screw head holding device in an engagement direction. Furthermore, a circuit breaker system is disclosed including a molded case circuit breaker and an assembly device. Moreover, a method is disclosed for mounting a molded case circuit breaker to a bus bar.

Abstract: An embodiment relates to an electric switch, particularly an electric circuit-breaker, including a rotor housing that can be turned to an ON and an OFF position and at least one electric contact arm that is mounted rotatably in the rotor housing and can be swiveled jointly with as well as relatively to it. A display element is included that is coupled indirectly or directly to the rotor housing and which in one display position indicates the ON position of the rotor housing and in another display position indicates the OFF position of the rotor housing.

Abstract: An embodiment relates to an electric switch, particularly an electric circuit-breaker, including a rotor housing that can be turned to an ON and an OFF position and at least one electric contact arm that is mounted rotatably in the rotor housing and can be swiveled jointly with as well as relatively to it. A display element is included that is coupled indirectly or directly to the rotor housing and which in one display position indicates the ON position of the rotor housing and in another display position indicates the OFF position of the rotor housing.