Abstract: The invention relates to connecting bars (4) made from profiled semifinished products and having a cavity, said bars having the same outer dimensions for different nominal currents and being intended for connecting the electrical components of electrical devices and apparatus to an external electrical circuit, wherein the connecting bars extend through the window opening located in the wall of the devices or apparatus and are fixed in the housing by fixing means consisting of two or more partial parts (11, 12) embodied as profiles, which are configured in such a way that they can be connected to one another by positive fit or otherwise to a hollow connecting bar (4). The partial parts (11, 12) have one or several legs (13; 16; 17), the length of which defines the height of the connecting bar (4).

Abstract: A connector rail includes a full profile which is provided with first bearing surfaces and second bearing surfaces which are used to provide support in the window opening of the rear wall of the housing. The second bearing surfaces are provided with projections for securing continuous current conductors which are aligned in a parallel manner and which are, for instance in the case of low voltage circuit breakers, embodied as male contacts for fixed contacts. Respectively corresponding projections are provided in order to secure the flexible cables to the moveable switching contacts or to secure the fixed switching contacts.

Abstract: A switchgear, for low-voltage switching units with a linearly-displaceable contact support, includes a case-like housing with guide grooves, running in the direction of travel of the contact support, in the housing side walls thereof. Suitable projections on the side of the contact support, engage in the grooves, whereby the linear travel of the contact support is achieved. Pivoting contacts are arranged on the contact support as displaceable switch contacts.

Abstract: A current measuring device (15) for a multi-pole low voltage circuit breaker (1). comprises a support body (20) with a through opening for a current conductor (4) for each of the poles and a receiving chamber (22), surrounding the through opening (21), for secondary components (26, 31) of current sensors and/or current transformers. The support body (20) is essentially plate-like and rectangular and forms part of the rear wall (13) of the circuit breaker (1). Should Rogowski coils (26) be used as secondary components of a transformer, then adjustable voltage dividers are also mounted on the support body for interdependent adjustment. The multi-pole current measuring device (15) simplifies the production of circuit breakers as approved components.

Abstract: A lever arrangement for transmitting a driving force to a switch contact of a power switch has parallel bearing plates with limiting parts mounted on them to reduce the distance between the bearing plates locally to a distance suitable for guiding hinge-connected levers. Hinge pins of the levers are guided so they slide along the limiting parts. Threaded pins are riveted to one bearing plate at one end and are secured on the other bearing plate with a nut.