Abstract:
An exemplary method for calibrating a current transducer of the Rogowski type including a Rogowski coil sensor and an electronic device is performed by determining and correcting the sensitivity of the current transducer of the Rogowski type through the measurement of the self-inductance LRCCT of the coil using the electronic device.
Abstract:
An exemplary field device connection unit includes a base plate on which a plurality of connection elements for connection of connecting lines with field devices and a plurality of module slots for receiving in each case one plug-in unit of different plug-in unit types. To avoid erroneous configurations, an identical type coding is assigned to the plug-in units of the same plug-in unit type, which identical type coding is formed by a plurality of wedge-shaped code elements which are anchored rigidly in the plug-in unit, and a plurality of wedge-shaped code elements are assigned to each module slot, which wedge-shaped code elements are mounted moveably about a rotary spindle between two opposite stops and whose wedge tips are oriented, in an initial rest position, centrally between the stops.
Abstract:
A three-phase non-linear transformer is cooled by first (30) and second fans (40). The first fan (30) is attached to the first core clamps (12) of the transformer using a first mounting structure (15). The second fan (40) is attached to the second core clamps (24) of the transformer using a second mounting structure (17). The first fan is positioned first so that air is directed toward a central passage of the core. The second fan is positioned so that air is drawn through the central passage of the core. The first fan circulates air through a central passage in the transformer core and channels that exist between adjacent coil assemblies. The second fan draws air through the central passage and channels and further expels the air into the surrounding environment. The first and second fans are controlled by a control panel through which they are run automatically or manually.
Abstract:
A device for detecting an islanding condition in an electricity distribution network. The device comprises means for concurrently monitoring an islanding condition and a network event condition in the electricity distribution network, means for detecting an islanding condition in the power system network, and means for determining on the validity of detection of the islanding condition based on whether there is an associated network event with the detected islanding condition.
Abstract:
A layer structure for producing a planar insulation laminate, including the following sequence of planar individual layers arranged one on the other: a B-stage resin, a glass fabric, a core layer made of polyester film, a glass fabric, and a B-stage resin. In the hardened state, an insulation material produced therefrom is suitable, for example, to be used as an insulation barrier between a low-voltage winding and a high-voltage winding of a transformer winding.
Abstract:
A method provides a medium voltage radial drop winding for an open wound transformers. The method arranges a plurality of non-electrically conductive supports to extend outwardly from a periphery of an imaginary geometric shape so as to define an interior space. Each support includes a pair of opposing legs disposed in spaced relation and a bottom leg coupling the opposing legs to define at least one elongated slot between the opposing legs. Each slot has an open end. Conductive wire is dropped into the open end of each of the slots to substantially fill the slots and define at least one generally cylindrical winding segment carried by the supports.
Abstract:
A process automation system includes at least one wireless-aware component for detection of the occurrence (e.g., start and end) of a wireless volume data transfer from at least one other component which might be a wireless-unaware component. Upon such detection, the at least one wireless-aware component requests for bandwidth on behalf of the wireless-unaware component to decrease the communication time and subsequently releases this bandwidth again. A method is provided for operation of the process automation system, in which an upload/download is generally detected by either explicit initiation of the upload/download in the wireless-aware component, or by automatic detection in the wireless-aware component.
Abstract:
A system and method are disclosed for automated handling of at least one working step of a workflow in an automation and/or electrical engineering project via a data input interface, a processing unit and a data output interface connected to the processing unit for transmitting any data read in by the data input interface or generated by the processing unit to at least one of a data repository, another processing unit and/or a display unit. The data input interface can read in input values belonging to the at least one working step of the workflow, and an input uncertainty including a range of input values. The processing unit can generate an output value of the working step from the input value, and calculate an output uncertainty characterizing a range of the output value, by taking into account a parameter and/or a technical condition of the working step.
Abstract:
An oil transformer includes a transformer vessel, a transformer core mounted in the vessel, at least one upright hollow cylindrical transformer coil including at least one axial cooling channel arranged around a limb of the transformer core, and an oil chamber arranged at an axial front side of the transformer coil. At least one first opening leading from the inner chamber to the belonging front side of the transformer coil is provided, and at least one second opening is provided within the surrounding boundaries of the oil chamber. The oil chamber is an under-pressure chamber, wherein the at least one first opening is an inlet port and the at least one second opening is an outlet port.
Abstract:
A transformer core is disclosed, which can include at least three hollow-cylindrical rectangular shaped core-discs wound from a magnetic band-like material, wherein two opposed limb areas and an upper and lower yoke area can be formed along a circumferential path. The core-discs can include one first and at least one second slanted area parallel to the circumferential path in the belonging limb area. The at least three core-discs can be connected according to a polygonal layout at their first slanted areas, which can be arranged adjacently face to face. Conical shaped polygonal adapter plates fitted to the polygonal layout within the upper and lower yoke areas, which can be clamped together.