Abstract: An electrical switching device having at least one pole includes a housing of an insulating material, and an incoming terminal contact and an outgoing terminal contact associated with a first pole. Each of the terminal contacts includes a first connection device for connection of a first external electrical conductor. At least one of the terminal contacts includes a second connection device for pluggable connection of a second electrical conductor.

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: The invention relates to a control circuit (2) for an electromagnetic drive. Said circuit contains first and second electronic switching elements (16 to 22), which in conjunction with a timing element (12) subject the drive coil (4) to a corresponding direct current in the starting phase or in the maintenance phase. A starting current (Ua) and a maintenance current (Ub) are provided by means of a current source (14) that is controlled by the timing element (12) and a direct current converter (10) with downward control.

Abstract: A serial transmission of data takes place on a bus (10) which has at least one forward line (8) and one return line (9) and is connected to a plurality of slaves (S1, S2, . . . ) and via whose forward line (8) successive data frames (R1, R2, . . . ) for successive slaves (S1, S2, . . . ) are transmitted. Each slave (S1, S2, . . . ) gates out, in the process, from the forward line (8) the data frame (R1, R2, . . . ) which is provided for it, and diverts said data frame (R1, R2, . . . ) directly to the return line (9) after processing. The transmission of data can therefore be carried out very quickly and with a high response speed.

Abstract: A programmable controller has a processing unit, a display screen, an operator unit, and signal inputs and signal outputs. The processing unit, the display screen, the operator unit, the signal inputs, and signal outputs are accommodated in a common housing, and switching functions can be programmed by the user on the basis of predetermined functions by using a menu-assisted user interface on the display screen. A button of the operator unit can be switched to an active button through the use of a programmable function, such that the sequence of a switching function depends on operation of this button.

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: An electromagnet system for a switch includes a main magnetic circuit including a magnet yoke and a magnet armature mechanically linked to a contact apparatus. At least one permanent magnet is disposed in the main magnetic circuit for generating a holding force for the magnet armature. A shunt circuit is provided parallel with the main magnetic circuit so that the permanent magnet is a magnetic energy source for the shunt circuit. The shunt circuit includes pole legs and a yoke arc of the magnet yoke. The magnet armature is capable of contacting the pole legs so as to close the shunt circuit. An excitation winding is provided for each of the pole legs for to generating a pull-in force for the magnet armature. The electromagnet system is magnetically dimensioned such that a minimum magnetomotive force of the excitation windings is sufficient for opening the electromagnet system.

Abstract: The invention relates to a modular selection button for actuating contact elements. Said button comprises a housing (6), spring-loaded switching lugs (81) and according to requirements a control switch (10), a rotary knob (11) or a key-operated switch (2) as a rotating actuator, in addition to one of several transmission members (4; 4?; 5; 5?), which transmits the movement from the actuator (10; 11; 2) to the switching lugs (81) via switching cam elements (42; 52). Stops and counter-stops which are fixed and displaceable respectively with respect to the housing (6) form various stop elements that can be used to select the number of switching positions and actuation modes. The various stops are configured on the housing (6), on the key-operated actuator (2) and on the second stop slides (92) that are to be inserted into the housing (6). The various counter-stops are configured in the control switch (10), in the rotary knob (11) and on the transmission members (4; 4?; 5; 5?).

Abstract: A self-recovering current-limiting device with a liquid metal includes a first and a second electrode for connection to an electric circuit to be protected. Each of the first and second electrodes are made of a solid metal. A plurality of pressure-resistant insulating bodies is provided, as well as a plurality of insulating intermediate walls supported by the insulating bodies. The plurality of insulating intermediate walls and the plurality of pressure-resistant insulating bodies define a plurality of compression spaces, and the plurality of insulating intermediate walls define a plurality of connecting channels. The plurality of compression spaces are disposed one behind the other between the first and second electrodes and are at least partially filled with the liquid metal.

Abstract: A circuit-breaker including a an interrupter chamber housing that includes a plastic material and houses an interrupter. The interrupter includes at least one stationary contact member, which, via a busbar is connected to a corresponding connecting terminal and a moveable contact member that is moveable connectable to the stationary contact member. To ensure that heat generated by the busbar is more rapidly released into the switch compartment housing the busbar is imbedded in an outer wall of the interrupter chamber housing and in contact with the housing by a form fit or a force fit.

Abstract: A contact element for an electrical switching apparatus is disclosed having a casing (2) with a basis part (8) and a cover part (10). Two electrical fixed contacts (4) have connections for electrical conductors and disposed inside of the casing (2). An actuating tappet (20) is supported over a first spring means (28) in the casing (2) and movable in an axial direction for receiving of a contact bridge (24), wherein the contact bridge (24) serves for connecting or, respectively, interrupting the electrical connection between the two fixed contacts (4), wherein the actuating tappet (20) is constructed such that the contact bridge (24) can be disposed in two different positions (A, B) having a distance from each other at the actuating tappet (20).

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 connecting terminal for switching device includes at least one receiving device configured to interchangeably receive either of a base contact element for a screw connection or a module for a spring-clamping device. A receiving shaft configured to engage the module is provided. The module includes an open mounting side configured for mounting the spring-clamping device.

Abstract: The invention relates to a device for fixing switchgears (2,4) on mounting rails, especially top hat rail adapters, comprising lower fixing means (8) which are used to secure the device on the mounting rail and upper fixing means (10a, 10b) which are used to secure at least one switchgear (2,4) on the device. According to the invention, at least one of the active elements (8b; 10b) is mounted in such a way that it can move in a linear manner on the fixing axis (X).

Abstract: The invention relates to a self-recovering current-limiting device with liquid metal. The device contains two solid metal electrodes (11, 12) which are rotationally symmetrical in relation to the longitudinal axis (3) of the current limiting device (1) and several compression chambers (4) which are partially filled with liquid metal (8) and arranged in a series between the electrodes (11, 12). The compression chambers are formed by pressure-resistant insulating bodies (5, 7) and insulating intermediate walls (6) which are supported by the same (6) and which have several connecting channels (9), distributed in a circular form. The aim of the invention is to extend the positions of use. To this end, the electrodes (11, 12) have cavities (14) which are connected to the adjacent compression chambers (4) by openings (16) and which are adequately wetted to completely filled with the liquid metal (8), according to the position of use.

Abstract: A safety lock out switch system for the prevention of an unexpected restart of an electrically powered machine in whose main power circuit it is installed. Therein the power-free status of the power supply output of the system is confirmed visually. The system is configured so it is flexible, thus being able to be used in the most various types or sizes of machines. Technical aspects and safety aspects were taken into account therein so that the installation can be carried out in practically every country in the world.

Abstract: An electronic drive control apparatus for controlling a drive coil of a contactor includes a microcontroller configured for generating an inverted pulse width modulated signal, and at least one semiconductor switch. A pulse-shaping stage is connected downstream of the microcontroller for varying the pulse width modulated signal. The pulse-shaping stage includes a preselectable RC combination and an inverter connected downstream of the RC combination and having a Schmitt trigger input. A preselection of the RC combination is carried out via a plurality of outputs of the microcontroller to open collector transistor stages of discharge resistors of the RC combination. The pulse width of the driving signal of the semiconductor switch is determined from the inverted pulse width modulated signal and the preselected RC combination.

Abstract: A coupling piece for carrying out digital transmissions between an electrical interface of a first device and an electrical interface of a second device. The devices each use different voltage levels for distinguishing between the two logical states “high” and “low”. An internal circuit is provided for converting the voltage levels of the first device to the voltage levels of the second device, which correspond to the state. The higher voltage level is conveyed to this internal circuit by one of the two devices so that the low level can be converted to the higher level. The internal circuit carries out the conversions using a switching process.

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.