Abstract: A method is disclosed for operating a circuit breaker, the 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 via the latching mechanism to the contact system 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: 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 molded-case circuit breaker includes a handle, a contact system and an actuating device. In an embodiment, the handle is movable between an “ON” position and an “OFF” position, the contact system includes at least one stationary contact and a movable contact and the actuating device is operatively connected to the handle and the contact system such that, when the handle is actuated, it is possible to open and close the contact system. Furthermore, in the event of a fault state, the handle can be brought into a “TRIP” position arranged between the “ON” position and the “OFF” position by the actuating device.

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. 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 via the latching mechanism to the contact system 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: 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: A molded-case circuit breaker includes a handle, a contact system and an actuating device. In an embodiment, the handle is movable between an “ON” position and an “OFF” position, the contact system includes at least one stationary contact and a movable contact and the actuating device is operatively connected to the handle and the contact system such that, when the handle is actuated, it is possible to open and close the contact system. Furthermore, in the event of a fault state, the handle can be brought into a “TRIP” position arranged between the “ON” position and the “OFF” position by the actuating device.

Abstract: A switching unit includes a pawl and a pawl spring, embodied such that, when a switching lever of the switching unit is moved from an ON position into a TRIP position and/or from the TRIP position into a RESET position, the pawl spring is bent by contact with a lateral face of the pawl. An electrical switching device, such as a circuit breaker, including at least one such switching unit is also disclosed.

Abstract: A multipolar electrical switch includes at least one central pole housing, which adjoins two adjacent pole housings of the switch. In at least one embodiment of the invention, an electrical switching mechanism for switching an electrical phase current on and off is contained in each of the pole housings respectively. The central pole housing is equipped with a fastening element, which extends through the central pole housing into the two adjacent pole housings, namely in each instance to at most the center of the adjacent pole housings.

Abstract: A switching apparatus for an electrical switching device, the switching device including a rotor housing rotatable between an open position and a closed position; at least one contact arm with a moving contact; and a switching unit with a switching lever, movable between an ON position and an OFF position, a switching frame, and a lever mechanism in functional contact with the switching frame and the rotor housing such that movement of the switching lever into the ON position allows the rotor housing to be moved into the closed position and movement of the switching lever into the OFF position allows the rotor housing to be moved into the open position. The lever mechanism includes at least one stop, configured to prevent movement of the switching lever into the OFF position, independently of the movement of the rotor housing, when the rotor housing is in the closed position.

Abstract: A test button is disclosed for an electrical switching device, especially for a circuit breaker; and an electrical switching device is disclosed, especially a circuit breaker, with a test button. The test button is at least one embodiment is embodied for actuation of a tripping mechanism of the electrical switching device. In this case, the test button actuates the tripping mechanism on the one hand if the test button is actuated manually and on the other hand if a cover element of the electrical switching device is opened. The actuation of the tripping mechanism by way of the test button ensures that the electrical switching device cannot be switched on or tripped respectively.

Abstract: A switching apparatus for an electrical switching device is disclosed, including a rotor housing that can be rotated between an open position and a closed position; at least one contact arm with a moving contact; and a switching unit with a switching lever, movable between an ON position and an OFF position, a switching frame, and a lever mechanism in functional contact with the switching frame and the rotor housing such that movement of the switching lever into the ON position allows the rotor housing to be moved into the closed position and movement of the switching lever into the OFF position allows the rotor housing to be moved into the open position. The lever mechanism includes at least one stop, configured to prevent movement of the switching lever into the OFF position, independently of the movement of the rotor housing, when the rotor housing is in the closed position.

Abstract: A test button is disclosed for an electrical switching device, especially for a circuit breaker; and an electrical switching device is disclosed, especially a circuit breaker, with a test button. The test button is at least one embodiment is embodied for actuation of a tripping mechanism of the electrical switching device. In this case, the test button actuates the tripping mechanism on the one hand if the test button is actuated manually and on the other hand if a cover element of the electrical switching device is opened. The actuation of the tripping mechanism by way of the test button ensures that the electrical switching device cannot be switched on or tripped respectively.

Abstract: A switching unit for an electrical switching device is disclosed, in particular for a circuit breaker, in which the pawl and the pawl spring of the switching unit are embodied such that, when a switching lever of the switching unit is moved from an ON position into a TRIP position and/or from the TRIP position into a RESET position, the pawl spring is bent by contact with a lateral face of the pawl. An electrical switching device, such as a circuit breaker, including at least one such switching unit is also disclosed.

Abstract: A multipolar electrical switch includes at least one central pole housing, which adjoins two adjacent pole housings of the switch. In at least one embodiment of the invention, an electrical switching mechanism for switching an electrical phase current on and off is contained in each of the pole housings respectively. The central pole housing is equipped with a fastening element, which extends through the central pole housing into the two adjacent pole housings, namely in each instance to at most the center of the adjacent pole housings.