Abstract: A connecting-device for a switchgear apparatus, includes: tulip-cluster-portions for electrically engaging with a contact-stud-element; a mounting-end-part for the mechanical connection to a pole-terminal, and conductive-transmitting-portions for transmitting electrical current from the contact-stud-element to the pole-terminal, each of the conductive-transmitting-portions extending from the respective tulip-cluster-portion to a respective base-portion of the mounting-end-part. The tulip-cluster-portions with the respective conductive-transmitting-portions and with the respective base-portions are integral with one other so as to define respective single-piece-portions.

Abstract: A method of estimating inductances and flux linkages of an electrical machine supplied with drive currents via current regulators. Drive current values are measured and fed back to the regulators for closed-loop control. The method includes providing one current regulator with an alternating current value either for a direct axis current reference i*d or for a quadrature axis current reference i*q of the machine current vector, while providing another current regulator with a predetermined direct current value for the remaining one of the two current references i*d and i*q. After a predetermined time, a varying signal is superimposed onto an output signal generated by the current regulator in response to the AC value. Finally, a contribution signal, which corresponds to the contribution of the superimposed varying signal to the drive currents, is determined, and the machine inductances and flux linkages are estimated on the basis of the contribution signal.

Abstract: A hydromechanical stored-energy spring mechanism is provided for operating at least one switching contact of a circuit breaker, for example, in a high-voltage switching system. The hydromechanical stored-energy spring mechanism includes a hydraulically operated close-open (CO) delay circuit configured to delay triggering of a switching process of the circuit breaker, and an electromechanical actuator provided in place of a hydraulic operation of the CO delay circuit. The electromechanical actuator generates a mechanical time delay or acceleration over an extended temperature range.

Abstract: An arrangement and a method are provided in connection with a solar energy system. The arrangement includes solar panels and a converter for converting the DC voltage from the solar panels. The converter is arranged inside a container or a similar closed structure. The arrangement includes means for producing heat from the energy produced by the solar panels. The means are arranged inside the container or a similar closed structure and are electrically connectable to the solar panels.

Abstract: An underfloor transformer includes a layered transformer core and at least one electrical winding through which the transformer core extends along a limb axis. In each of two axial end regions of the transformer core, a securing device, which interacts with the transformer core mechanically, is provided. The securing devices are configured for such tensile force stressing. The underfloor transformer can be carried suspended therefrom.

Abstract: A system analyzer and a method for analyzing an impact of a change in a component of a distributed control system (DCS) are disclosed. The system can collect and store data representing the DCS components and their interconnection as well as signals of the DCS components. The DCS can be graphically modeled with nodes and directed edges, wherein a node represents either a type of DCS component or a signal of a DCS components, and wherein an edge is an “influence”-edge, or a “contains”-edge. Information on a change of a DCS components is received, a depth first or breadth first search is performed over the “influence”-edges and “contains”-edges and determine unchanged DCS components which would be affected by a malfunction, a removal or a taking out of operation of the at least one DCS component, and information on the affected DCS components is transmitted to an operator interface.

Abstract: A disconnector for electric power equipment filled with dielectric liquid, especially transformers, applicable in protecting the operation of electric power equipment. The disconnector contains at least two cylindrical current-limiting fuses situated inside a tank, and each fuse is electrically connected with external phase power supply and through fixed contacts and moving contacts of the disconnector with the active part of the piece of electric power equipment. The disconnector is characterized in that the current-limiting fuses are placed in a common housing, in which a slide with a pilot is situated, and to the slide there are inseparably fixed moving contacts, which move together with the slide when the slide makes a to-and-fro motion. The to-and-fro motion takes place as a result of the operation of a tripping device situated in the current-limiting fuses and of the compression or stretching of springs fixed to the pilot and to a fixing disk.

Abstract: A system and method for additively manufacturing splices and terminations for extra high, high, medium and low voltage power cable includes providing an additive manufacturing machine having at least one print head. Cable ends can be secured within a chamber from which atmospheric air can be evacuated and replaced with non-oxidizing gas. A scanning device can determine the composition and position of the various constituents of the cable ends, from which information a controller can determine the printing sequence and print a termination or splice portion.

Abstract: A laminated cable includes a metal laminate surrounding a cable core having first and second ends. Solder is applied adjacent the ends of the laminate, and is heated and subsequently cooled to form a metal seal. The solder can be melted in a plastic jacketing extruder as the extruder applies a plastic jacket over the metal laminate.

Abstract: A clamping element is configured for mounting a rail element bearing electrical/electronic devices on a supporting portion of a switchgear cabinet. The clamping element includes a body provided with a coupling portion configured for engaging with an opening portion of the rail element. The coupling portion is configured for enabling the body to be at least one of coupled with and removed from the rail element when the body is positioned in a first configuration relative to the rail element. The coupling portion is configured for hindering removal of the body from the rail element when the body is positioned in a second configuration relative to the rail element. The clamping element also includes a clasping device protruding from the body and configured for removably connecting the body to the supporting portion to mount the rail element within the switchgear cabinet.

Abstract: Exemplary controllers in a system are associated with technical entities and are configured to selectively execute tasks in a primary mode when the controllers interact with the associated technical entities with respect to the tasks, and to execute tasks in a secondary mode when the controllers do not interact with the associated technical entities with respect to the task. The system distributes task instructions of a first task to a first controller that is configured to execute the first task in the primary mode, and to distribute the task instructions of the first task to a second controller that is configured to execute the first task in the secondary mode. The system distributes task instructions of a second task to the second controller that is configured to execute the second task in the primary mode.

Abstract: A switching device including a breaker electrically connectable to an electrical conductor, and an at least partially electrically conductive housing to which the breaker is mounted, the housing having an outer surface. The breaker includes an electrically conductive first contact and an electrically conductive second contact, the second contact being movable and in relation to the first contact and in relation to the housing, and when the first and second contacts are in contact the breaker is in a closed position, and when the first and second contacts are separated the breaker is in an open position. The switching device is arranged to provide a current path between the breaker and the electrical conductor, and the housing houses a guiding member for operating the second contact, the guiding member being movable in relation to the housing, wherein the guiding member includes a biasing assembly.

Abstract: A transformer is provided with a tap configuration that permits only valid tap connections to be made. The transformer has a tap board to align the tap connections in the desired configuration depending on the number of tap positions available for the application. The taps are brought from the coil assembly through to openings on the tap board to allow manual connections between respective taps.

Abstract: A gas-insulated switchgear assembly is provided that includes a housing having an interior containing insulating gas. A disconnector is disposed in the housing and includes a movable contact, as well as fixed contacts that are spaced apart and arranged linearly in a direction perpendicular to a wall of the housing. The movable contact has a colored or topographical marking and is linearly movable among a plurality of positions. The wall of the housing is provided with an inspection window that permits a person to see the colored or topographical marking in relation to the fixed contacts, thereby permitting the person to determine the position of the movable contact.

Abstract: Exemplary embodiments relate to a method for adapting graphic representation on a user interface of a computer user station for the graphic representation of data of an industrial processing plant. Input signals received on or at the computer user station result in a size change of the graphic representation by zooming of the predefinable display region on the user interface or the selection of an object field of the graphic representation. The object field being located in the graphic representation at an associated object field position, for display or user interaction. With the selection of an object field for display or user interaction, the size of the object field on the user interface is fixed for display or user interaction, even if zooming of the graphic representation results in other data of the graphic representation not being readable or activatable by a user.

Abstract: An exemplary magnetic actuator for a circuit breaker arrangement includes a coil, a core with a groove for accommodating a section of the coil, and a movable plate configured to be attracted by the core. When a magnetic field is generated by the coil, the movable plate actuates the circuit breaker arrangement based on the attraction to the core. The magnetic actuator also includes a position locker for locking the coil in the groove. The position locker having a locking part protruding away from the core and over a section of the coil not accommodated in the groove.

Abstract: A high-voltage transformer module includes a transformer core including at least one winding, and a mechanical supporting structure having the transformer core integrated permanently therein. The mechanical supporting structure has corner points arranged in the form of a right-parallelepiped. The corner points are in the form of load transfer points and are arranged corresponding to the dimensions of a CSC (International Convention for Safe Containers) container.

Abstract: Techniques are disclosed for performing the estimation and/or prediction of the dynamic system state of large power system networks, using a multi-processor approach. More particularly, a large power system network is divided into smaller sub-systems, each sub-system having associated dynamic state variables. Each sub-system is assigned to one or more of a plurality of processing elements, and dynamic state variables for each sub-system are estimated or predicted independently, using the processing elements and sensor measurements. In several embodiments, the dynamic state of each sub-system is computed through the construction of a set of dedicated observers, such as linear parameter-varying (LPV) observers, which are designed to reduce the effects of other sub-systems on the state estimation problem.