Abstract: A plug-in adapter for optional connection of a three (3) pin plug system to different nationally specific plugging systems both with and without grounding contact. The adapter comprises a housing with a polarity of different projecting plugging systems disposed thereon. A socket receptacle supported for rotation in the housing is provided and presents electrical contacts adapted to be connected in the respective rotational positions of the socket receptacle, which are associated with the outer plugging systems, with corresponding electrical contacts of the respective plugging systems. Further, at least one of the plugging systems comprises a grounding contact pin supported for movement in the housing.

Abstract: An overcurrent release device for protection switching devices, in particular automatic line circuit breakers or motor protective switches, with electromagnetic and thermoelectric release, includes a thermoconducting tubular supporting body onto which a coil is wound and which has a striking end and an opposite widened receiving end for bearing contact and radial support of a bimetal snap-action disk with a central bore, a core having a bore defined therein, an armature movable in the supporting body between its striking end and the core, and a slide extending through the bore in the snap-action disk and through the bore in the core in a direction towards the armature. The slide is provided for thermoelectric disengagement by means of the snap-action disk via a thickened portion and for electromagnetic disengagement by means of the armature via a slide actuator. In the operative state, the spacing between the armature and the core corresponds at maximum to the snapping travel of the snap-action disk.

Abstract: A DI fault current leakage guard switching device for detecting improperly wired networks or missing connections includes a totalizing current transformer for detecting fault currents in a phase conductor line and a neutral conductor line, a switching stage, a DI guard switch, and a detecting unit for detecting fault conditions of a protective earth conductor line. The detecting unit receives signals on the phase conductor line, neutral conductor line and protective earth conductor line, respectively. The detecting unit is connected to the switching stage for controlling the DI guard switch.

Abstract: A DI fault current leakage guard switching device for detecting improperly wired networks or missing connections includes a totalizing current transformer for detecting fault currents in a phase conductor line and a neutral conductor line, a switching stage, a DI guard switch, and a detecting unit for detecting fault conditions of a protective earth conductor line. The detecting unit receiving signals on the phase conductor line, neutral conductor line and protective earth conductor line, respectively. The detecting unit is connected to the switching stage for controlling the DI guard switch.

Abstract: A device for turning an electric motor on and off implements an expedient instantaneous turn-on or turn-off switching operation in which contact bridges are released for closing or pushed open by means of a spring-operated over-center device. Pivoting elements are rotated by means of the switching slide via their articulated legs such that, when the dead-center position, which is located between the axes of the pivoting elements, is overcome, one pivoting element axis is shifted in a quick-action motion. As a result of the contact bridge control levers, which are provided in different angular positions on the respective pivoting elements, a sequential switching of two contact bridges can be implemented such that initially the first contact bridge and then the second contact bridge are released for closing under the action of the contact closing spring while for opening initially the second and then the first contact bridge may be pushed open in opposition to the contact closing spring.

Abstract: Fault-current protector circuitry has a first totalling current transformer (7) with a primary winding formed from phase (1) and neutral (2) conductor lines and a secondary winding (13) connected to a first analyzer circuit (16). A second totalling current transformer (10) has a primary winding formed by a protective conductor line (3) and a secondary winding (17) connected to a second analyzer circuit (20). A trigger device (24) connected to the first and second analyzer circuits actuates switches (4,5,6) which are connected into each conductor (1,2,3). The fault-current protector circuitry is especially for isolation monitoring of electrical circuits and which has the advantage of reliably isolating the monitored circuit from the mains if fault currents occur in the phase or neutral conductor lines and if a current appears in the protective conductor line.

Abstract: A device for switching an electric motor, particularly for braking an electrically operated tool, comprises change-over switches 19' and 20' for connecting and disconnecting the electric motor to and from an associated power source, for reversing the polarity of a field winding or armature winding of the electric motor, and for enabling and disabling an electric braking circuit for the electric motor, also an actuating member 21' for the change-over switches 19', 20', a movable contact 32', which is associated with each change-over switch and is movable between a fixed ON contact 30' and an OFF contact 30, which is spaced an arcproof distance from said ON contact, and a sliding guide 40', which is associated with at least one movable contact 32' and is adapted to guide said movable contact over at least part of its path of movement during the switching operation. The actuating member consists of a switching slider 21', which cooperates with a toggle lever 54.

Abstract: A circuit breaker with an input side and an output side for connecting and disconnecting conductors in an electrical circuit comprising a magnetic breaker device which acts on a latching mechanism unit for opening a contacting device in case of overload, an arc-quenching means being connected to said magnetic breaker device, whereat said magnetic breaker device comprises two parallel connected coils.

Abstract: A device for separating a pair of electric contacts which tend to weld and consist of a stationary contact 11 and a contact 12 which is movable away from the stationary contact, particularly in a circuit breaker is provided. The device includes a tripping lever 17, which is biased in a contact-separating direction and serves to actuate the movable contact 12, and means 19 for holding the tripping lever 17 in its stand-by position. The movement of the tripping lever 17 from its stand-by position involves a displacement of a lever fulcrum to a first position where a strong separating force is exerted on the movable contact 12 and then to a second position where a weaker separating force is exerted on the movable contact 12.

Abstract: A circuit breaker comprises high-duty arc-quenching means 23 and a latching mechanism 19, which is adapted to be electromagnetically and thermoelectrically unlatched by means of a snap-action bimetal disk 52 to open contacting means 21 in response to an overload. The snap-action bimetal disk 52 is held in a carrying body 32, which has a high thermal conductivity and which carries an electromagnetic exciter coil 33 and contains an associated plunger 42. For tripping in response to an overload, the plunger 42 is adapted to be actuated either electromagnetically and/or by the snap-action bimetal disk 52. The movable contact 21 will remain open when the latching mechanism 19 has been unlatched. In response to a movement of the plunger 42 out of its make position, the latching mechanism 19 is unlatched by a first arm of a two-armed lever 37, which is made of lucite and is pivoted to the carrying body 42. The contacting means 21 are adapted to be struck open by the second arm 41 of the lever 37.

Abstract: A protective switching device with difference-current, undervoltage and free tripping in a confined space, for example within a conventional mains angle plug or the like, the switch-on and plunger-type magnet mechanics and the electronic monitoring arrangement are divided per se in constructional groups capable of being assembled efficiently.