Abstract: A mechanical-electronic position sensor in which the wiper voltage of a potentiometer actuated by a plunger is measured, processed by a microcontroller, and is available as an analog output signal via an output stage. In the event that watchdog signals fail to appear because of a malfunction of the microcontroller, two monitoring stages deactivate the output stage. The monitoring stages themselves are tested by regularly interrupting the watchdog signals for a short time while the output stage is maintained active.

Abstract: An auxiliary operating device for an electromechanical switching device having an operating mechanism. The auxiliary operating device including an actuating element couplable to the operating mechanism and movable between a first position and a second position, an actuation member movable relative to the actuating element between a third position and a fourth position, and a drive dog arrangement configured to cooperate with the actuating element and the actuation member. The auxiliary operating device further includes a coupling device movable between a release position and an operating position. The coupling device is configured, when in the operating position, so as to move the actuating element with the actuation member in a second direction of movement when the actuation member is in the third position. The coupling device is configured, when in the release position, so as to allow movement of the actuation member in the first and second directions between the third and fourth positions.

Abstract: A switching device for direct-current applications includes a housing having a first wall and a second wall, a plurality of receiving areas for respective mutually substantially parallel current paths disposed in the housing. Each of the current paths has a respective stationary switching contact element and a respective movable switching contact element, the movable switching element being actuatable into a closed position and into an open position so as to form a respective air break, the respective movable switching contact elements being actuatable simultaneously. The switching device includes a plurality of arc-quenching devices associated with the current paths and disposed next to each other, and at least one magnet. The at least one magnet is configured to generate a magnetic field so as to generate a deflection force on the arcs so as to deflect the respective arcs toward at least one of the respective arc-quenching devices.

Abstract: A switching shaft unit for an electrical contact system for use in a low-voltage breaker. The switching shaft unit includes a rotary contact moveably disposed, with play, in a switching shaft or a shifting shaft segment, and having a pair of bearing pins. The switching shaft unit further includes at least one contact piece configured to make switchable contact with at least one fixed contact, and at least one pair of force springs. Each force spring is supported by an associated respective support disposed in an interior of the switching shaft or the switching shaft segment, and an associated respective bearing pin, so that, upon an opening movement of the rotary contact, a connection line defined through the associated bearing pin and the associated support of at least one of the force springs is displaced over a breakover point plane so that the rotary contact remains in an open position.

Abstract: A switching device for direct-current applications including a housing, and at least three current paths. Each current path includes a respective movable switching contact element, a respective stationary switching contact element, and a respective air break between the respective movable and stationary contact elements. Each movable switching contact element is movable into a closed position and into an open position. The switching device includes a quenching capacitor connected in parallel to the respective at least one air break of a first of the current paths and configured to at least one of prevent the formation of an arc and quench an arc formed therealong. The quenching capacitor is not coupled to a second of the current paths. The second current path is couplable in series to the first current path.

Abstract: An auxiliary actuating device for an electromechanical switching device. The actuating device including a handle housing rotatably disposed on an actuating shaft coupled to the switching device and engageably coupled to a door coupling handle, an exterior having at least one handle element, and an interior having a plurality of first coupling elements. The actuating device further including a coupling wheel rigidly connected to the actuating shaft and received in the handle housing, the coupling wheel having a plurality of second coupling elements and a spring element to act between the handle housing and the coupling wheel. Further, the first and second coupling elements engage with each other through a displacement against a force of the spring element, the housing is bendable, and the handle hosing includes locking hooks configured to snappedly secure the coupling wheel in the housing, and limit an axial displacement of the housing.

Abstract: A manually operated circuit breaker for motor protection and/or line protection includes a basic board including a switching mechanism, a contact device, and a main current path. The switching mechanism includes a switching apparatus and a breaker latching mechanism. The circuit breaker includes a manual actuating device disposed in a housing part protruding from an operating front and configured to activate the switching mechanism via a rotary knob and an actuating shaft disposed perpendicular to the operating front. The circuit breaker includes an electronic control unit module pluggable onto the basic board and configured to be set with at least one control variable for a fault scenario so as to activate the switching mechanism by indicating a settable fault scenario. The electronic control unit is supplied with a voltage from the main current path via the contact device.

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: An electronic trip unit for a motor circuit breaker of an electric motor includes at least one detection unit configured to sense at least one current that is delivered to the electric motor. The unit further including a discriminator circuit, the discriminator circuit being in a first state when no measured current value exceeds a predefined trip threshold, and being in a second state when at least one measured current value exceeds the predefined trip threshold. The discriminator circuit includes an output for controlling the motor; a voltage-limiting component having a breakdown voltage; a resistor; and a switching unit configured to, in the first state, switch the control signal to the first level, and, in the second state, switch the control signal to the second level, the switching unit being configured to be switched by a voltage drop across the resistor.

Abstract: A contactor includes a housing lower section housing a solenoid mechanism, a main contact and a housing upper section, for housing main terminals and a connector module including control terminals which may be connected to the solenoid coil of the solenoid mechanism. The housing upper section includes a recessed step to the front of a housing side, in which the connector module may be fixed. The control terminals are located facing the housing front in front of the plane of the main terminals. Connector lines extending into the main housing from the connector module connect the control terminals to the control pins, connected to the solenoid coil and located in the housing lower section.

Abstract: A combination of at least two electromagnetic switching devices, each of which is provided with a plug-in connector socket and can be fixed side by side on a support in a stationary position in relation to one another and can be connected to form electrical contact by means of a connection unit. The connection unit includes an electrical conductor connection and a plug-in connector system. The conductor connection is encased by a housing of the connection unit and the plug-in connector system is encased by the lateral faces of the connection unit that face the switching devices. The plug-in connector system is configured to be displaced on the lateral face of the connection unit towards the lateral face of the neighbouring device in the connection unit housing.

Abstract: An electric switching device, designed to carry a low-voltage, in particular a circuit-breaker or contactor, having at least one arc-quenching unit (16;18) is provided. Connection contacts (8) are mounted in a housing (2) that can be sealed by a cover (4) and switching chambers (10) are configured in the housing. To adapt the device to different current ranges, the housing (2) and cover (4) are equipped with guide and retaining elements (12, 26, 28, 30) for cooling plates (16) that can be inserted and for arc-quenching laminated cores (18) that can be interchanged with the plates.

Abstract: A tamper protection device for an electrical switching device including a housing and a panel for at least one control element. The tamper protection device a protection cap configured to prevent unwanted operation or tampering of the control element when in position on the housing and a seal retainer configured to block the protection cap from being removed from the covering position when the seal retainer and protection cap are connected by a secured seal wire thereby forming a sealed unit. Each of the protection cap and the seal retainer are releasably connectable to the housing. When the protection cap and seal retainer are secured as the sealed unit it is non-releasably connectable to the housing by an interlocking connection.

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 contactor includes a housing lower section housing a solenoid mechanism, a main contact and a housing upper section, for housing main terminals and a connector module including control terminals which may be connected to the solenoid coil of the solenoid mechanism. The housing upper section includes a recessed step to the front of a housing side, in which the connector module may be fixed. The control terminals are located facing the housing front in front of the plane of the main terminals. Connector lines extending into the main housing from the connector module connect the control terminals to the control pins, connected to the solenoid coil and located in the housing lower section.

Abstract: A control circuit for an electromagnetic drive includes first and second electronic switching elements, which in conjunction with a timing element subject the drive coil to a corresponding direct current in the starting phase or in the maintenance phase. A starting current and a maintenance current are provided by means of a current source that is controlled by the timing element and a direct current converter with downward control.

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: The invention relates to a data transmission system for the serial asynchronous data transmission between two devices (1; 3). The aim of the invention is to provide a secure data transmission system for the communication between two devices that can be produced with as little technical effort as possible. To this end, two circuit parts that are interconnected by means of a two-wire circuit (8) are used which are provided with respective receiver circuit elements (2b; 4b) and respective emitter circuit elements (2a; 4a). The inventive system also comprises a source of current (6) via which a current (1q) can be fed to the data transmission line (8a) so that signal states can be modified depending on the input signals of the circuit parts while at the same time parts of the circuits are supplied with current.