Abstract: A circuit breaker for multi-phase power includes an opening-closing apparatus configured to open and close each phase of the multiphase power, a detection unit configured to detect a fault current in at least one phase of an electrical installation being protected by the circuit breaker, a plurality of connecting bars disposed on a load side of the circuit breaker, and a short circuiter disposed on the connecting bars and configured to produce a short circuit between the connecting bars if a fault current is detected by the fault-current detection unit. When a fault current occurs, a tripping signal can be transmitted by the detection system to the short circuiter. The circuit breaker is also fully operational, even without a function-activated short circuiter.

Abstract: An arrangement used to fix conductor rails for multi-phase switchgears to allow for mounting and dismantling the conductor rails in a simple manner is provided. The switchgear housing (4) comprises straight guide elements (16) which are used to receive the mounting position using the conductor rails (8). Each conductor rail (8) includes a continuous bore (22) which is covered by a receiving bore (24) when in a mounted position, the receiving bore being formed in the switchgear housing (4). Insertion journals (28) extend through the continuous bores (22) into the receiving bores (24) associated therewith and are combined with a connecting web (30) in order to form an insertion comb (26) made of an insulating material.

Abstract: A leading auxiliary switch includes an auxiliary switch housing for attachment to a circuit breaker. An operating slide is provided having a sliding edge and being supported so as to be movable in a first sliding direction. A contact carrier is provided supported so as to be movable parallel to the first sliding direction. The contact carrier includes a sliding nose and is movable in a first operating phase of the operating slide against an action of a contact pressure spring into an ON position of movable contacts with fixed contacts. A drive slide is supported in the auxiliary switch housing so as to be movable in a second sliding direction transverse to the first sliding direction, the drive slide including first and second opposed sliding surfaces extending at an angle to the first and second sliding directions. The sliding edge of the operating slide abuts against the first sliding surface in the first operating phase and is out of contact with the first sliding surface in the second operating phase.

Abstract: A connection module arrangeable on a connection side of a main casing of a power switch comprises a plurality of connection spaces limited by a removable covering cap and by lateral separation walls. When said connection module is mounted, connection bars provided with a through hole and arranged in the main casing are projected into the connection spaces, which are provided with lateral guiding elements formed in the separation walls for frame terminals surrounding the connection bars and for guiding elements on bottom side for screw plates placed under the connection bars. A cylindrical reception area coaxially extends with respect to the associated through hole from each connection space bottom and is closed on a bottom side by a breakable wall part and receives a connection sleeve through the broken wall part in such a way that said connection sleeve is at least indirectly connected to the associated connection bar.

Abstract: A mechanical locking device for mechanically connected contactors includes a first and a second actuating member and a locking element. The actuating members are operatively connected respectively to an electromagnetic operating mechanism and a movable contact of a respective contactor. The first actuating member has a first curved recess adjacent the first connecting sidewall. The second actuating member has a second curved recess adjacent the second connecting sidewall. The locking element includes a rolling element received in a respective opening in each of the first and second connecting sidewalls. The first actuating member urges the locking element into the second recess when the first contactor is in a switched-on condition and the second actuating member urges the locking element into the first recess when the second contactor is in a switched-on condition.

Abstract: An electrodynamically tilting contact system for power circuit breakers includes an actuating shaft segment, a rotary contact bridge pivotally mounted therein and contact force springs that form components of a tilting snap-action mechanism, which holds the rotary contact bridge in a repulsed position after an electrodynamically effected repulsion of fixed contacts. Two rockers, while serving as an additional component of the tilting snap-action mechanism, are mounted on the rotary contact bridge in a manner that enables them to tilt. The contact force springs are supported between the actuating shaft segment and the rockers, whereby the spring longitudinal axes, the tilting axes of the rockers, and the rotational symmetry axis of the rotary contact bridge are located in the tilting point plane of the tilting snap-action mechanism.

Abstract: A contactor includes an upper housing part (2), connecting bars (8) that are fixed in the upper housing part, a front housing cover and box terminals (20) that are located in terminal housings. To simplify the connection technique for the contactor, the housing cover has two right-angled cover halves (4, 6), whose respective front cover limbs (16) lie opposite one another in close proximity and which can be fixed onto the upper housing part (2). The cover limbs (18) of the housing cover on the connection side are configured as terminal housings.

Abstract: A method for operating an electromagnetic operating mechanism includes, upon application of a control voltage, resetting and initializing a control circuit and starting a charging of a charge storage device. Subsequently, an auxiliary tripping coil and a main tripping coil are sequentially briefly energized, and, if no current flow occurs through at least one of the tripping coils, the control voltage is permanently disconnected. If a current flow occurs through each of the tripping coils, a closing coil is energized so as to move the armature to an attracted position, and the closing coil is subsequently de-energized. Subsequently, sequentially briefly energizing the auxiliary tripping coil and the main tripping coil are sequentially briefly energized without affecting the armature. Upon removal of the control voltage, the charge storage device is discharged through the main tripping coil so as to move the armature to the dropped-out position.

Abstract: A data transmission device for serial, synchronous transmission of data includes a master device and a slave device which can be linked by at least one data transmission line and a clock signal line. The master and slave devices can be linked by an additional ready signal line for transmitting a ready signal from the slave device to the master device. When the slave device has completed a data reading operation, a ready signal can be generated for the master device. The master device is able to initiate a further writing operation to the slave device only after receiving the ready signal from the slave device. Suppression of interference by the slave device may be enhanced.

Abstract: A contactor includes an upper housing part (2), connecting bars (8) that are fixed in the upper housing part, a front housing cover and box terminals (20) that are located in terminal housings. To simplify the connection technique for the contactor, the housing cover has two right-angled cover halves (4, 6), whose respective front cover limbs (16) lie opposite one another in close proximity and which can be fixed onto the upper housing part (2). The cover limbs (18) of the housing cover on the connection side are configured as terminal housings.

Abstract: An arrangement used to fix conductor rails for multi-phase switchgears to allow for mounting and dismantling the conductor rails in a simple manner is provided. The switchgear housing (4) comprises straight guide elements (16) which are used to receive the mounting position using the conductor rails (8). Each conductor rail (8) includes a continuous bore (22) which is covered by a receiving bore (24) when in a mounted position, the receiving bore being formed in the switchgear housing (4). Insertion journals (28) extend through the continuous bores (22) into the receiving bores (24) associated therewith and are combined with a connecting web (30) in order to form an insertion comb (26) made of an insulating material.

Abstract: A circuit breaker includes current detectors, a microprocessor-controlled tripping device, and a bypass circuit that interacts with a watchdog circuit that monitors the proper functioning of the microprocessor. A switchable reference voltage is made available to the bypass circuit as a function of the momentary supply voltage. During short circuits, the bypass circuit, immediately upon being switched on, responds to very high limit current values, whereas after the switch-on phase, it already responds at moderately high limit current values.

Abstract: A method for connecting an expansion module to a programmable electric switching device includes initiating a recognition mode within the switching device during which an interrogation is carried out as to whether or not the connected expansion module is initializable. If the expansion module is not initializable, no data is exchanged between the switching device and the expansion module. If the expansion module is initializable, the switching device switches into an expansion communication mode in which data exchange takes place under the control of the operating system of the expansion module.

Abstract: In a method for function monitoring of an electronic-mechanical position switch in which the wiper voltage of a potentiometer acted upon by an actuation tappet is evaluated in comparison to a threshold value in order to activate or deactivate electronic contacts, during first or second test intervals a microcontroller interrupts watchdog signals or contact-closing control signals and checks the state of the switching contacts. If the expected state transition of the switching contacts from the closed into the open state does not occur, then the control signals make the transition to the contact-opening signal level or the watchdog signals are discontinued.

Abstract: A combination of an electromagnetic switching device and a printed circuit board incoming and outgoing connecting conductors associated with switchable conducting paths in the switching device. The connecting conductors are each associated with a connecting terminal for connecting an external electrical conductor. Pin contacts are connected to the printed circuit board for establishing a connection to the switching device. Each of the connecting conductors includes a contact receptacle accessible from the front of the switchgear housing for providing a contact connection to one of the pin contacts.

Abstract: A protective circuit-breaker comprising includes an operating mechanism for closing and opening main contacts. An evaluation unit is provided for processing a measured value of the phase current, comparing the processed measured value to an adjustable fault criterion, and tripping the operating mechanism via a trip solenoid by outputting a trip signal when the fault criterion is exceeded. A measuring terminal is connected to the evaluation unit at an input side thereof and configured to supply a monitored electrical quantity supplied by a temperature-dependent resistor connected to a motor-driven system supplied via the protective circuit-breaker. The evaluation unit includes a measuring device for measuring a change in the monitored electrical quantity and for outputting a trip signal when the monitored electrical quantity exceeds a predefined limit.

Abstract: A mechanical locking device for mechanically connected contactors includes a first and a second actuating member and a locking element. The actuating members are operatively connected respectively to an electromagnetic operating mechanism and a movable contact of a respective contactor. The first actuating member has a first curved recess adjacent the first connecting sidewall. The second actuating member has a second curved recess adjacent the second connecting sidewall. The locking element includes a rolling element received in a respective opening in each of the first and second connecting sidewalls. The first actuating member urges the locking element into the second recess when the first contactor is in a switched-on condition and the second actuating member urges the locking element into the first recess when the second contactor is in a switched-on condition.

Abstract: The invention relates to an electronic assembly, in particular for low power consumption electric switching devices such as low power contactors, time relays or the like. In order to provide protection against input current pulses, an ohmic resistor (6) is provided in the form of a resistive layer that is applied by pressing.

Abstract: A modular electrical device combination includes an operator control module and a computer module that can be electrically coupled to the operator control module. The operator control module has a fastening portion on its rear side for installation into a mounting panel. Mechanical connecting means are provided in an extension at a free end of the fastening portion.