Abstract: A circuit breaker has at least one pole arrangement with a movable contact. A twin-armed lever is pivotally mounted for opening and closing the movable contact. A switch-on energy storage device is provided and a cam disc that is coupled to the switch-on energy storage device and, via an actuating element, to a first end of the lever. The second end of the lever is connected to the movable contact piece of the pole arrangement. There is also provided at least one switch-off energy storage device. The circuit breaker has a simple and compact design. The actuating element is a switching shaft, which interacts with the cam disc, is mounted such that it can rotate and is connected to the first end of the twin-armed lever via the switch-off energy storage device.

Abstract: A switch pole for interrupting an alternating electrical current has a supporting frame formed of insulating material. An interrupter extends in a longitudinal direction within the supporting frame between an input connection and an output connection and is configured to interrupt the alternating current between the input connection and the output connection. The input connection, the output connection, and the interrupter are held by the supporting frame. The insulating capacity of the supporting frame of the novel switch pole can be matched in a simple manner to the requirements placed respectively on the switch pole. For that purpose, the supporting frame has latching means for accommodating additional insulating parts, with which the insulating capacity of the supporting frame is increased.

Abstract: A movable arm assembly for a circuit breaker includes a unitary structure having two blade portions being connected by a bend location. The bend location forms a gapless surface region. A contact is connected to the unitary structure wherein the gapless surface region and a contact surface of the contact are connected to form a joint therebetween. A method for forming a movable arm assembly includes forming a blank from a conductive sheet, the blank including a unitary structure having two blade portions, bending the blade portion at a bend location to form a gapless surface region at the bend location and joining a contact to the unitary structure on the gapless surface region at the bend location to form a movable arm assembly.

Abstract: A movable arm assembly for a circuit breaker includes a unitary structure having two blade portions being connected by a bend location. The bend location forms a gapless surface region. A contact is connected to the unitary structure wherein the gapless surface region and a contact surface of the contact are connected to form a joint therebetween. A method for forming a movable arm assembly includes forming a blank from a conductive sheet, the blank including a unitary structure having two blade portions, bending the blade portion at a bend location to form a gapless surface region at the bend location and joining a contact to the unitary structure on the gapless surface region at the bend location to form a movable arm assembly.

Abstract: Switch position indications and interlocks for power breaker circuits for air-insulated medium-voltage switchgear assemblies, having the functional features of power switching, disconnection and grounding. The switch position indications and interlocks are integrated jointly in control modules and are provided by indication slides and interlock slides which are guided in a center plate which is arranged between a front-face cover plate and a retaining plate facing the inner region of the power breaker systems, with the center plate having a number of guide openings matched to the positions and contours of the indication slides and of the interlock slides, the cover plate having a number of viewing openings matched to the positions and contours of the indication slides and of the interlock slides, and the retaining plate having a number of bushing openings matched to the positions and contours of the indication slides and of the interlock slides.