Abstract: A load disconnecting circuit is disclosed with a housing that has a first housing section, which houses the drive, and has a second housing section, which houses a fixed contact element and a longitudinally extended moving contact element. The second housing section has a longitudinal extension adapted to the moving contact element. Field-control rings are placed on the second housing section while encircling it, of which the first are arranged in the vicinity of the fixed contact element and the second are arranged in the vicinity of the switch-off position of the moving contact element. Via a respective connection conductor, the first field-control ring is connected to the potential of the fixed contact element, and the second field-control ring is connected to the potential of the moving contact element when in its switch-off position.

Abstract: A closing resistor arrangement for a high-voltage circuit breaker has a large number of resistor elements and a large number of cooling elements, the cooling elements being arranged in series with one another and being connected electrically in series with one another. The resistor elements, which electrically connect the electrical cooling elements to one another, are arranged between in each case two cooling elements which are arranged in series.

Abstract: The invention relates to a fuse system for a switchgear assembly, especially for a medium voltage switchgear assembly. The fuse system comprises a plurality of fuses which correspond to the number of phases, every fuse having a tripping bar that projects from the face of the fuse under the effect of the force of a spring when the fuse comes into action. A sealing body, with a spring arrangement interposed, pushes a sealing head into the interior of a receptacle receiving the fuse. A two-armed lever is received on the sealing head, one arm covering a tripping mechanism which actuates a power switch.

Abstract: A method and apparatus for communicating with an intelligent electronic device coupled to a switching device used in a power system, wherein a user-interface software program operates on a computing device which is operatively connected to the intelligent electronic device. The user-interface software program when executed by the processor of the computing device provides a plurality of wizards selectable by a user. Upon selecting a wizard to be executed, the user-interface software program causes the display on a monitor of a first window displaying wizard controls for guiding a user in the execution of one or more steps related to the selected wizard, and a second window separate from the first window displaying information related to the step under execution.

Abstract: The disclosure relates to an electromagnetic actuator, such as for a medium-voltage switch, having a core having a coil applied to it, and a movable yoke. A method for producing such an actuator is also disclosed. A compact design can be achieved with, at the same time, a high level of actuator force, using a magnetic circuit of the actuator which has a rectangular magnet core and a round yoke which corresponds to the magnetic circuit of the magnetic core.

Abstract: The invention is directed to a transformer and a method of manufacturing the same. The transformer has high and low voltage coils mounted to legs of a core. Each low voltage coil includes conductor sheeting having opposing first and second ends and opposing first and second side edges. A pair of coil bus bars is provided for each low voltage coil. Each coil bus bar has first and second portions, wherein the first portion has a width that is more than one and a half times greater than a width of the second portion. Each coil bus bar is secured to the conductor sheeting of its low voltage coil such that the first portion of the coil bus bar is disposed at the first side edge of the conductor sheeting and the second portion of the coil bus bar is disposed at the second side edge of the conductor sheeting.

Abstract: The disclosure relates to a contact drive arrangement for the movement of at least one contact in high-voltage switchgear systems having a contact drive and having an auxiliary switch, which has at least two auxiliary contacts. The contact drive works together with the at least one contact and with a first auxiliary contact. Furthermore, a delay drive is connected functionally in parallel with the contact drive, and the delay drive works together with a second auxiliary contact. The first and second auxiliary contact are electrically connected in series. In addition, the delay drive has a damping element, and by means of the damping element the time for a switching operation is extended in comparison with the time for a switching operation with the contact drive.

Abstract: A circuit breaker and/or earthing switch are disclosed wherein a rotatable spindle nut, which is mounted in a spindle housing, displaces a spindle in a translatory manner, thus displacing contact elements of the switching device. The spindle actuates a contact pin that is configured in a contact carrier by a connection yoke that is common to all phases or poles and an isolating bar for each phase or pole.

Abstract: The invention relates to a winding for a transformer or a coil. Said winding is made of a winding material comprising a strip-type electric conductor which is connected in a detachable manner to at least one wide side having at least one layer of insulating material. The winding material is wound about a winding axis in order to prevent axial offset in order to form the threads. The invention further relates to a method for the production of said type of winding.

Abstract: The switching chamber is intended for a gas-insulated high-voltage switch. It contains a housing filled with insulating gas and a contact arrangement held in the housing. The contact arrangement has, in a coaxial arrangement, the following components: two switching pieces, which are capable of being moved relative to one another along an axis, with in each case one arcing contact and in each case one tubular conductor containing a rated current contact, an insulating nozzle, and a compression apparatus with a fixed piston and a cylinder. A moveable tubular conductor of the two tubular conductors forms the wall of the cylinder, is electrically conductively and rigidly connected to one of the two arcing contacts via a base of the cylinder and bears the insulating nozzle.

Abstract: A contact system for a short-circuiting device for a switchboard, the contact system including at least one fixed contact piece connected to a main voltage source. The contact system also includes at least one moving contact piece and an insulating screen penetrable using the at least one moving contact piece so as to make contact between the at least one moving contact piece and the at least one fixed contact piece. The screen is disposed between the at least one fixed contact piece and the at least one moving contact piece.

Abstract: A cradle and a method for adapting a circuit breaker for mounting in a switchgear cabinet having a bus bar system. The cradle includes a frame to which a racking apparatus and a locking apparatus are mounted. The racking apparatus is operable to move the cradle into and out of electrical connection with the bus bar system. The locking apparatus has a first operating state, wherein the locking apparatus prevents the circuit breaker from being disposed in the frame and allows the racking apparatus to operate, and a second operating state, wherein the locking apparatus allows the circuit breaker to be disposed in the frame and prevents the racking apparatus from operating.

Abstract: The invention relates to a heat exchanger for a transformer for a transformer comprising a heat exchanger medium, which can be introduced into a heat exchanger element via a feed element, and can be evacuated from the heat exchanging element via a discharge element. The invention involves a first temperature measurement of a feed flow of the heat exchanger medium and a second temperature measurement of a discharge flow of the heat exchanger medium. A first opening is provided in the feed element, inside of which a first temperature probe is positioned at a predetermined location inside the feed flow during operation of the heat exchanger, and a second opening is provided in the discharge element, inside of which a second temperature probe is positioned at a predetermined location in the discharge flow during operation of the heat exchanger.

Abstract: A current conductor for an electrical device including an electrically conducting central section having a first side and a second side. The central section is configured to receive at least one inserted electrical component. Two electrical conducting shield sections are each disposed on one of the first side and the side and configured to shield against an electric field. The shield sections cover the central section and the at least one inserted electrical component.

Abstract: The disclosure relates to minimizing the potential damage caused by the failure of a single central Intelligent Electronic Device (IED) responsible for calculating, assigning and storing information about switchyard zones of a high or medium voltage switchyard comprising switchyard elements interconnected by lines, and wherein the switchyard is operated by means of a Substation Automation system including a plurality of Intelligent Electronic Devices. For example, a distributed switchyard zone management is disclosed, comprising a distributed storage of the knowledge about the switchyard zones. Assignments of individual switchyard elements or components, such as switches and connectivity nodes, to the various switchyard zones are stored on several IEDs. If one of these IEDs fails, the services or applications based on switchyard zones thus are not necessarily doomed, as would be the case if the entire knowledge about switchyard zones were stored on one single central IED.

Abstract: A method and an apparatus for collecting data related to a status of an electrical power system, wherein data is continuously acquired from the electrical power system and is stored, at least temporarily, in a first volatile memory. Upon the occurrence of an event, the data stored in the first volatile memory is copied and permanently stored in a second non-volatile memory.