Abstract: A low-voltage power switch with a relative auxiliary switch which is actuated as a signalling switch only when the generally multi-pole low-voltage power switch is triggered. The problem to be solved is that of controlling relative auxiliary switches simply and independently of the switch latch. To this end, the switch latch is designed in such a way that the included angle of the moveable contacts or the switching sprindle (18) is greater in the "triggered" than in the "off" state. A radial extension (60) is arranged on the switching spindle (18) in such a way that, in the "triggered" state, it engages a fixed pivoted lever (68) which itself is effectively connected to the prestressed actuating pushrod (66) of the relative auxiliary switch (56).

Abstract: A safety device for mechanical switching devices such as circuit breakers which can be mounted on mounting surfaces or plugged into plug-in pin bases. The safety device ensures that the mechanical switching device is tripped both when it is being installed, and also when it is being removed.

Abstract: Substation for the distribution of electrical energy, and protected against arcing faults, characterized by the fact that Hall-effect sensors and additional optical fiber conductors are provided as sensors, whereby the Hall-effect sensors are logically AND linked with the optical fiber conductors.

Abstract: A circuit configuration for a signalling device in circuit breaker units, in particular in power circuit breakers, which have an electronic tripping device and which become effective in the event of a fault in an electrical system to be protected, whereby the electronic tripping device includes a microcontroller which performs a fault evaluation, and for each type of fault makes available an output pin, from which the corresponding fault signal is amplified and transmitted to an electrical relay. The fault signal (FM, FM1 . . . FMn) is transmitted to the circuit configuration (SA, SA1 . . . SAn), and by means of logic operation with the action of a static standard signal and of a clock pulse signal (Clock Pulse) acts on the electrical relay, which is realized in the form of a bistable relay (RB, RB1 . . . RBn) the contact system of which corresponds to a make function or a break function, depending on the signal status of the standard signal.

Abstract: The invention discloses a memory access control for coupled mask-program over microcontrollers in particular in connection with applications for memory storage programmable control in the low-cost region. The coupling of the microcontroller (MC1) and of the memory access authorization to the external program memory storage and data memory storage (7) is thereby based on a hardware wiring circuit in cooperation with a handshake provided by software. Always only one microcontroller accesses the external program memory storage/data memory storage (7) while the other microcontrollers access their internal program memory storage. The memory storage access is coordinated by the microcontroller (MC1) operating as a master through its output port (Px.y). On the hardware side the memory storage access signal (PSEN) and the address access signal (ALE) are multiplexed for the access-authorized microcontroller.

Abstract: A circuit breaker with a blocking mechanism having reversing levers which are rotatably mounted on both sides of the supporting lever of the circuit breaker, which reversing levers are in contact with the upper toggle in an interlocking manner. The reversing levers are moved when the switch latch moves. If there is an attempt to switch "off" when the contacts are welded together, the further movement of the switch latch is prevented by stops on the selector shaft. When switching "off" is performed when the contacts are satisfactorily open, the reversing levers automatically reverse the toggle system with regard to overcoming the throw-over point thereof, so that the "off" position of the circuit breaker is reached reliably.

Abstract: A circuit breaker having a housing structure with accessory devices for power circuit breakers, which housing structure can essentially eliminate the need for complex and expensive methods for the insertion and positioning of the accessory devices in the main housing of the power circuit breaker. For that purpose, in the rear portion of the narrow side walls of the accessory housing enclosing an accessory device, there are first rigid guide and retaining members and second rigid retaining members located opposite one another, interacting with these members are a rigid third guide and retaining member and a flexible fourth retaining member, which are located in a recess of the top part of the main housing, which recess contains the accessory housing or housings. Actuator elements of the accessory devices, if any, and the corresponding bottom actuator openings in the recess interact as second and third guide members.

Abstract: A current limiting contact system for a circuit breaker with improved durability and a reliable electrodynamic contact system opening. The moveable contact is composed of several contact fingers with a moveable contact piece. Each contact finger is mounted at one end by a swivel pin and connected at the other end to the selector shaft by a toggle system which is acted upon by a contact force spring. On the swivel pin side of a phase connector, tabs are configured. The tabs, when lateral contact pressure is applied, produce the sole electrical connection with the contact fingers. The force effect of the contact force spring is translated into an obtuse angle, in the "ON" state, to the contact finger. During electrodynamic opening, the relevant contact finger tips into a stable position. The wear on the contact pieces is counteracted by increasing contact pressure force up to the maximum travel. The contact system for limiting short circuit currents is suitable for multi pole circuit breakers.

Abstract: A contact system for current limiting units which are combined with power circuit breakers or motor circuit breakers. The object of the invention is to improve the reliability of the current limiting unit equipped with such a contact system, while reducing the time and effort required to assemble and install such a contact system. The invention teaches that the contact systems can be assembled from a contact carrier with a stationary contact tip and a subsystem preassembled with little force, which can be installed in the arcing chambers in a stable condition and under the force of contact compression springs. The subsystem contains the wiper provided with the moving contact tip, which wiper is mounted with a direct electrical connection to a supply lead. Supports in the subsystem limit the movement of the wiper in both directions.

Abstract: An overload relay comprising three modules, each enclosed in molded housings: the basic unit, the contactor-side terminal block and the load-side terminal block. Both terminal blocks have phase connectors which can be the same or different in terms of their type of connection and/or their clearance between phases and/or their phase height. The terminal blocks can be mechanically and electrically detachably connected to the basic unit. At least the basic unit or the terminal blocks have means for fastening to a mounting plate. In an additional solution, the terminal blocks are part of a series which is compatible with at least two different contactors. A typical field of application for the invention is the protection of electric motors.

Abstract: The breaker mechanism for power circuit breakers is the energy storage link between the handle and the contact systems. Known breaker mechanisms are generally too expensive to manufacture. When contact welding occurs, there is also the risk that, in spite of the tripping of the breaker mechanism, the contact system will not open. The new breaker mechanism reliably opens the contact system and consists of fewer and technologically simpler individual parts. It is inserted between two symmetrical breaker plates held in a die cast housing, and in which a connecting piece is mounted. Two toggle levers are connected at a distance from one another by means of a connecting shaft engaged in crossbar cam slots. A toggle lever spring is engaged between the connecting piece and the connecting shaft. A bracing lever which can be driven by the connecting piece is friction locked in the breaker plates, and the toggle levers in the bracing lever.

Abstract: An electrical switching device such as a low voltage power circuit breaker, can have a cover with a slot-like opening for providing access to a switch lever of the switching device. The cover can extend to cover over any chambers for shunt releases and/or auxiliary switches etc. which chambers can be located on both sides of the switch lever within the enclosure. The cover can also have fastening devices for attachment of a mechanical rotary actuator or a motor drive. The cover is connected to the enclosure in a manner which provides for a simple opening and closing of the cover, and essentially eliminates the danger of losing and mixing up such covers. The cover is designed with bearing legs which are bent at an angle of 90 degrees in relation to the cover plane. The bearing legs are preferably parallel to one another and laterally overlap the enclosure. The cover is mounted to the enclosure by means of the bearing legs and pivot bearing with coaxially interlocking pivots and pivot bearing openings.

Abstract: The known arrangements of low-voltage energy distribution include connecting elements for busbar trunking systems with which, while a change of direction is possible, the currents are limited. The new device is intended to make it possible to easily change directions, even with high currents. To achieve this object, the invention teaches that the busbars at the junction site are placed in such a way around a common tensioning element that they can be rotated.

Abstract: The invention relates to a method for the coding and the availability of a chip card, which is provided as memory storage in a programmable control system. During the initial operation of a chip card with a control system a coding process is performed. The coding process specifies the chip card to the control system and encodes the chip card. The chip card can only be copied after the coding process. However, the copy can only be used in the control system on which the original or master chip card was coded. In the event of a defect in the system hardware, a chip card may be used in a second control system so that the total system installation remains available. The second control system remains functionally operable with a chip card for a time-limited period if the code of the chip card does not coincide with the code of the control system.

Abstract: An apparatus for electrical connection which has good contact characteristics, consists of simple parts, is easy to assemble and install, and is also suitable for the electrical connection to C-shaped bus bars or bus bars with slot shaped tap zones, which bus bars are preferably in withdrawable unit distribution boards or panels. The apparatus preferably has a mounting element, elastic contact elements, and a plug element. The plug element preferably has a plug shell, a contact strip, and contact laminar strips, which contact laminar strips are embedded in window like openings of the plug shell and act as elastic current bridges between the bus bar or socket element and the contact strip carrying the current located within the connection apparatus.

Abstract: A device is disclosed for connecting control current lines in low voltage switchboard plants. The device should allow the control current in a plug-in distribution board to be easily maintained up to a test position of the rack and to be cut beyond this position when the rack is drawn out. The device has two multipoint plugs with plugs and sockets, of which the first is rigidly linked to the rack and the other is movably mounted over a limited path on two guiding pins, the terminal cross-section of which is enlarged. In the test position they are locked in by elastic elements, ensuring complete contact between both multipoint plugs in this position when the rack is inserted. A plurality of control lines can be easily cabled with little attrition in a reduced space within a plug-in distribution board and a test position can be reached by drawing out the rack.