Abstract: A carrier shaft with a modular structure for an electromechanical switching device of an embodiment includes at least one first carrier module, at least one second carrier module and at least one connecting module, arranged in a torsion-inhibiting manner between the at least one first carrier module and the at least one second carrier module. The connecting module includes a main body and at least one connecting device and the connecting device are arranged in the main body, the at least one first carrier module and the at least one second carrier module. Another embodiment relates to an electromechanical switching device with the carrier shaft.

Abstract: A carrier shaft with a modular structure for an electromechanical switching device of an embodiment includes at least one first carrier module, at least one second carrier module and at least one connecting module, arranged in a torsion-inhibiting manner between the at least one first carrier module and the at least one second carrier module. The connecting module includes a main body and at least one connecting device and the connecting device are arranged in the main body, the at least one first carrier module and the at least one second carrier module. Another embodiment relates to an electromechanical switching device with the carrier shaft.

Abstract: A method is disclosed for operating a circuit breaker. The circuit breaker includes an operating lever, a latching mechanism and an electrical contact system with a movable contact and a fixed contact. The operating lever is movable into an ON-position and an OFF-position. Further, the operating lever is mechanically connected to the electrical contact system via the latching mechanism such that when the operating lever is in its OFF-position, the contacts of the electrical contact system are opened and when the operating lever is in its ON-position, the contacts of the electrical contact system are closed. Further, such a circuit breaker is also disclosed.

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.