Abstract: A network monitoring device for a supply network and a method for actuating a switch unit are disclosed, wherein the switch unit can control the energy supply of a consumer connected to a supply network. In order to prevent an overload of the supply network or of parts thereof, according to an embodiment of the invention, the network monitoring device includes a communication device, wherein the network monitoring device can receive a switch command for a switch unit via the communication device and transmit same to the switch unit, wherein the network monitoring device is designed to determine a network utilization of the supply network by way of a measurement device and, in dependence on the determined network utilization,; to influence a received switch command for the switch unit, which would lead to increased energy consumption on the supply network.

Abstract: An embodiment of the invention relates to a device for protecting a load, with a first current path having two lines, and a monitoring arrangement for detecting an imminent overload of the electrical load. In order to enable the detection of an imminent overload on a load, it is proposed that the monitoring arrangement includes a first temperature measuring unit, an evaluation unit and a first transducer, which establishes an electrically conductive connection between the two lines of the first current path, wherein the first temperature measuring unit is electrically isolated from the first transducer and can record a temperature of the first transducer, wherein the evaluation unit can determine, using recorded temperatures of the first transducer, a temporary heating behaviour of the first transducer, and can determine, by evaluating the determined temporary heating behaviour of the first transducer, an imminent overload on the load.

Abstract: A plate-shaped quenching element for a quenching unit of a switching device is produced of an electrically and also magnetically conductive plastic. In a special embodiment, the plastic is composed of a flame retardant material. At least one embodiment relates to a quenching unit and a quenching and plugging unit having a plurality of such quenching elements. Furthermore, at least one embodiment of the invention relates to a switching device having such a quenching unit and/or such a quenching and plugging unit.

Abstract: A network monitoring device for a supply network and a method for actuating a switch unit are disclosed, wherein the switch unit can control the energy supply of a consumer connected to a supply network. In order to prevent an overload of the supply network or of parts thereof, according to an embodiment of the invention, the network monitoring device includes a communication device, wherein the network monitoring device can receive a switch command for a switch unit via the communication device and transmit same to the switch unit, wherein the network monitoring device is designed to determine a network utilization of the supply network by way of a measurement device and, in dependence on the determined network utilization, to influence a received switch command for the switch unit, which would lead to increased energy consumption on the supply network.

Abstract: A plate is disclosed for inscription for a control unit in automation technology contains a plate-shaped lower part. In at least one embodiment, the lower part has a front flat side, and an inscription element is provided on the front flat side. In at lease one embodiment, the lower part is optically translucent, and an electrical luminous element couples light into the lower part.

Abstract: In order to achieve thermomechanical overload protection with a broad adjustment range for protecting against overload currents, the live components carry an electrical current which is between the value of the overload current and zero. According to at least one embodiment of the invention, switching devices are used which, in a preferred embodiment, switch the current, in parallel, from a first current branch to at least one second current branch, the parallel-connected at least one current branch carrying a partial current, which is between the value of the overload current and zero. In the associated overload protection device, contact devices are provided which are associated with live components on two current branches which can be connected in parallel with one another, wherein at least one current branch can be switched on and off by the switching devices.

Abstract: A plate is disclosed for inscription for a control unit in automation technology contains a plate-shaped lower part. In at least one embodiment, the lower part has a front flat side, and an inscription element is provided on the front flat side. In at lease one embodiment, the lower part is optically translucent, and an electrical luminous element couples light into the lower part.

Abstract: An electromagnetic switching device is disclosed with an electromagnet and a movable magnet armature, which is mounted in the switching device with a resetting force, which counteracts the closing force, is different than zero in an OPEN position and is formed at least partially by a magnet arrangement with at least one permanent magnet. The magnet arrangement is arranged fixed in position in the switching device outside the magnetic circuit formed from the electromagnet and the magnet armature, and whose resetting force, which acts on the magnet armature, is at a maximum in the OPEN position.

Abstract: A plate-shaped quenching element for a quenching unit of a switching device is produced of an electrically and also magnetically conductive plastic. In a special embodiment, the plastic is composed of a flame retardant material. At least one embodiment relates to a quenching unit and a quenching and plugging unit having a plurality of such quenching elements. Furthermore, at least one embodiment of the invention relates to a switching device having such a quenching unit and/or such a quenching and plugging unit.

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: 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 self-recovering device current limiting device with liquid metal includes two solid metal electrodes for connecting to an electric circuit to be protected. Several compression chambers partially filled with liquid metal are arranged one after the other between the electrodes. The compression chambers are formed by pressure-resistant insulating bodies and insulating intermediate walls supported by the insulating bodies. The insulating bodies include several connecting channels. To adjust the current limiting device to a desired nominal current factor, the level of the liquid metal above the connecting channels can be modified using an adjusting device. A reservoir is connected to the adjusting device, which can be adjusted and fixed in place externally.

Abstract: A self-recovering current-limiting device with a liquid metal includes two T-shaped electrodes for connection to an electric circuit to be protected. Each of the electrodes are made of a solid metal. Several compressor cavities which are partially filled with the liquid metal are situated one behind the other between the electrodes. The compressor cavities are formed by pressure-proof insulating bodies and by insulating intermediate walls which are provided with connecting channels and which are held by the insulating bodies. The insulating bodies and the intermediate walls form a uniform upper and lower half shell with opposite-lying joining surfaces. The half shells are connected in a sealed manner along joining surfaces in the area of a common middle plane of the connecting channels. Up to half of each of the electrodes is accommodated in corresponding recesses of the half shells, the electrodes extending with their respective middle limb out of the half shells.

Abstract: A self-recovering current-limiting device having liquid metal includes solid metal electrodes for connecting to an external electric circuit to be protected. A plurality of compression spaces which are partially filled with liquid metal are arranged one behind the other between the electrodes and are formed by pressure-resistant insulating bodies and by insulating partitioning walls having connecting channels. An enclosing insulating shaped housing is provided having a trough-like bottom part and a cover that tightly closes the bottom part via a non-positive and/or positive connecting device. The partitioning walls and the bottom part are interconnected as one piece. The connecting channels are configured as longitudinal holes which are open at the top. The electrodes are mounted in the bottom part. The nominal current range of the device may be easily adjusted.

Abstract: A self-regenerating current limiter with liquid metal includes solid metal electrodes for connection of the current limiter to an electric circuit to be protected. A plurality of compression chambers that are partially filled with liquid metal are located one behind the other between the electrodes. The compression chambers are formed by compression-proof insulating bodies and insulating partition walls that have communicating channels and that are supported by the insulating bodies. Non-conductive ceramic disks are mounted on the inner surfaces of the electrodes. The disks are located opposite the communicating channels of the adjacent partition walls.

Abstract: A self-regenerating liquid metal current limiter including solid metal electrodes for connection to an electric circuit to be protected and several compression chambers which are partially filled with liquid metal. The compression chambers are located one behind the other between the electrodes and are formed by pressure-resistant insulating bodies and by partition walls with connecting channels that are supported by the insulating bodies. The partition walls are provided with a plurality of connecting channels that are not arranged in a generally concent arrangement with respect to a substantially horizontal longitudinal axis of the current limiter, the axis extending in a direction perpendicular to the partition walls. The current limiter provides for various positions of use corresponding to a position of rotation of the current limiter about its longitudinal axis.