Abstract: The invention relates to a method and a device for measuring a first voltage and a second voltage by means of a differential voltmeter. The differential voltmeter comprises a first inlet and a second inlet and a known voltage potential is applied to the second inlet. The voltage measurement comprises the following; a first voltage is applied to a first inlet of the differential voltmeter, a first differential voltage is measured, the first voltage from the measured first differential voltmeter and the known voltage potential is determined, the second voltage is applied to the second inlet of the differential voltmeter, a second differential voltage is measured, and the second voltage from the measured second differential voltage and the previously determined first voltage is determined.

Abstract: A device for identifying a control mode for a voltage or current release of a voltage-release or current-release switching device includes at least one control unit having first and second control inputs. The control unit includes a signal detection device configured to detect a signal state at a first control input and a blocking device configured to disable the second control input when a control signal is detected at the first control input.

Abstract: A power supply for a voltage or current-releasing switching device having at least one coil for one of a voltage and current release includes a device which activates a switch means in a pulse-width modulated manner, the device configured for setting the current flowing in the coil, wherein inductance of the coil functions as an impedor of a clocked power supply which, via a rectifier diode and a storage capacitor, provides a first supply voltage that is predefinable via a comparison value. A voltage regulation device provides at least one second supply voltage. A measurement-resistor-free regulation device is provided for setting the current through the coil.

Abstract: The invention relates to an electrical switching arrangement which is arranged in a switching chamber, comprising at least one contact arrangement comprising a moving contact and a fixed contact, with the fixed contact being formed on a fixed contact mount (18) which is arranged at the end (13) of a busbar (10), and, furthermore, with a contact rest mount (20) and a switching arc guide apparatus (30), which is produced from ferromagnetic material, being formed on the fixed contact mount (18). It is proposed that the fixed contact mount (18) be formed with a holding opening (17) and that the switching arc guide apparatus (30) be in the form of an inlay element which can be mounted with a force fit in the holding opening (17) on the fixed contact mount (18).

Abstract: A control apparatus for a switching device including a contactor drive and a coil includes a pulse width-controlled switching mechanism connected to a coil and a control unit connected to the switching mechanism. The control unit is configured to generate a control signal having an adjustable pulse width and set the adjustable pulse width as a function of an input voltage signal so as to maintain a current through the coil approximately constant. The control unit is further configured to determine a voltage of the control apparatus by determining an instantaneous coil voltage of the coil and adjusting a current pulse width modulation turn-on time in accordance with the instantaneous coil voltage using at least one data processing unit.

Abstract: A power switch disposed in a housing includes a contact breaker configured to connect and disconnect a low-voltage switchgear from a power source supplying the low-voltage switchgear, a triggering device configured to disconnect the low-voltage switchgear in an overload event, a current detection device, a control device, a first evaluation device configured to evaluate an accidental arc overcurrent, and a second evaluation device configured to evaluate the accidental arc overcurrent. The power switch is configured to be activated via an overcurrent signal generated by an arc monitoring system in response to the accidental arc overcurrent. The overcurrent signal is linked to the at least one triggering signal. The second evaluation has a threshold above a threshold of the first evaluation device. The triggering device is configured to be activated via a turn-off pulse when a signal from the current detection device is above the threshold of the second evaluation device.

Abstract: The present invention provides a rotary drive for a switch actuated by a toggle lever. The rotary drive includes an operative connection which swivels, a first catch element on the operative connection, coupled to the toggle lever, and a second catch element on the operative connection. A mounting plate parallel to the switch base and a rotatable shaft are provided, the rotatable shaft disposed through the mounting plate. The rotary drive further includes a swivel arm on the shaft, a rotary knob coupled to the shaft configured to rotate the shaft. A mechanical connection couples the swivel arm to the second catch element, converting movement of the shaft into a movement of the operative connection. A swivel movement of the toggle lever is transferred to the second catch element, and the swivel arm enables the operative connection to swivel through a rotation of the shaft to move the toggle lever.

Abstract: An actuating unit or actuating mechanism and release for a circuit breaker. The magnetic mechanism of the release includes a magnet armature, which can move linearly in a magnet coil, is in the form of a tripping plunger and can be moved towards a permanent magnet counter to the force of a storage compression spring and is held fixedly by said permanent magnet in the case of a magnet coil through which no current is flowing. The tripping unit is in the form of a mechanical force store. After a tripping action, the mechanical force store needs to be reset manually again. For this purpose, a rotary movement of the drive shaft with an angular displacement of from 20 to 30 degrees takes place in the opposite direction to the ON switching rotary movement.

Abstract: A device for limiting short-circuit current in a consumer network having at least one supply line with a respective current feed point includes a disconnection point disposed in the at least one supply line so as to provide a first partial line and a second partial line in an event of a short-circuit fault. Each of the first and second partial lines has a respective associated current detector and at least one of the first and second partial lines has at least one current feed aggregate. The device includes a multiphase high-speed short circuiter having a current carrying capacity for short-circuit current intensities in the at least one supply line and a respective power circuit breaker connected in series with the high-speed short circuiter. The respective associated current detector is configured, upon detection of a short circuit in one of the first and second partial lines, to transmit a triggering signal so as to effect a short-circuit switching operation.

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: A plug arrangement for an electric or optical cable includes a connector body connected with the cable and including a first socket or plug. An insulating housing is provided configured to receive the connector body. A locking tab is articulated at a front edge of the connector body and configured to block release of the connector body from a counter body having a plug-in opening and including a second plug or a socket complementary to the connector body. A length of the locking tab is less than or equal to a depth of the plug-in opening. A resilient actuation element is provided including a pressure body extending parallel to a plug-in direction of the plug arrangement. The actuation element is integrally disposed in an articulated manner via a film hinge on the housing so as to be deformable with the housing and actuate the locking tab. The actuation element is integrated in a wall of the housing via at least one surface element disposed on the housing.

Abstract: A system for configuring slave stations connected to a bus configured to have a predefined number of slave stations connected thereto includes at least one master station, and a configuration module connected to the bus and configured to receive a query from the master station at a beginning of a configuration process. The configuration module is configured to provide information corresponding to a configuration of the slave stations connected to the bus. The configuration module has a plurality of mechanical setting devices, a number of the mechanical setting devices corresponding to the predefined number of slave stations connectable to the bus. Respective positions of the mechanical setting devices indicate a sequence of the slave stations connected to the bus.

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 the 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 the connection sleeve is at least indirectly connected to the associated connection bar.

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, a plurality of connecting bars disposed on a load side of the circuit breaker, and a fastening device disposed on the connecting bars and configured to detachably fasten a short circuiter to the connecting bars, the short circuiter configured to create a short circuit between the connecting bars when a fault is detected by the detection unit. The option proposed according to the invention of installing a short circuiter means that the circuit breaker is fully operational, either with or without the installation of a short circuiter.

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 plug adapter for plugging a connecting lead having at least two poles onto a switching device having a respective secondary contact, for a respective lead conductor, disposed parallel to a combination plug-in orifice includes, on a bottom side facing the switching device, a housing cutout. Associated with each of the at least two poles is a respective access contact including a contact spring. The access contact has a housing opening, and a respective plug, a respective conductor bar. The free end of the contact spring is elastically preloaded, and a damping device is configured to simultaneously clamp the lead conductors to the contact spring and actuatable via an actuator bracket.

Abstract: An operating mechanism, for a switch of a switching device disposed in a control cabinet having a door, includes a locking device having a locking element movable between a release position and a locking position. A spring device is configured to bias the locking element toward the release position. A force-transmitting member is operatively coupled to a resilient control member of the door, the force-transmitting member being configured to actuate the locking element.

Abstract: A thermal and/or magnetic overload trip device for an electrical switching device having multiple poles includes a housing having a housing member configured to receive a plurality of functional elements and being at least partially closable, The overload trip device further including a conductor strap associated with each of the multiple poles, each conductor strap having an associated housing portion, and a rotatable trip shaft configured to rotate between a rest position and an actuating position so as to trip an associated switching mechanism. The overload trip device further including at least one rotatable adjusting element configured to set the at least one of the presettable thermal threshold and the presettable magnetic threshold. Further, the housing member is configured so that the functional elements is insertable therein and is couplable to the housing member.

Abstract: An actuating unit or actuating mechanism and release for a circuit breaker. The magnetic mechanism of the release includes a magnet armature, which can move linearly in a magnet coil, is in the form of a tripping plunger and can be moved towards a permanent magnet counter to the force of a storage compression spring and is held fixedly by said permanent magnet in the case of a magnet coil through which no current is flowing. The tripping unit is in the form of a mechanical force store. After a tripping action, the mechanical force store needs to be reset manually again. For this purpose, a rotary movement of the drive shaft with an angular displacement of from 20 to 30 degrees takes place in the opposite direction to the ON switching rotary movement.