DE386211C - Current transformer for high voltage alternating currents - Google Patents
Current transformer for high voltage alternating currentsInfo
- Publication number
- DE386211C DE386211C DEP43369D DEP0043369D DE386211C DE 386211 C DE386211 C DE 386211C DE P43369 D DEP43369 D DE P43369D DE P0043369 D DEP0043369 D DE P0043369D DE 386211 C DE386211 C DE 386211C
- Authority
- DE
- Germany
- Prior art keywords
- current
- iron core
- high voltage
- windings
- current transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
- H01F27/422—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers
- H01F27/427—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers for current transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/32—Circuit arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Description
Stromwandler für hochgespannte WechseIströme.# Vorliegende Erfindung bezieht sich auf Stromwandler für hochgespannte Ströme, bei denen mit Rücksicht auf gute Isolation zwischen Ober- und Unterspannungswicklung die Spulen beider Teile nicht direkt übereinander oder nebeneinander, sondern getrennt auf je einem Schenkel des Eisenkernes angordnet werden. Der Stro=esser besteht dabei aus mehreren in Reihe geschalteten Elementen, von denen jedes einen gegen Erde iso ierten Eisenkern und zwei vom Eisenkern gegen Hochspannung isolierte Stromwicklungen besitzt.Current transformers for high-tension WechseIströme. # The present invention relates to current transformers for high-tension current, where the coils of both parts are not directly above the other or side by side but angordnet isolated on a respective leg of the iron core with respect to good insulation between upper and lower voltage winding. The current consists of several elements connected in series, each of which has an iron core insulated from earth and two current windings insulated from the iron core against high voltage.
Die durch diese Anordnung bedingten, stark ausgeprägten Streufelder sollen nun in an sich bekannter Weise durch eine Kurzschlußwicklung vernichtet werden, und zwar soll der Erfindung gemäß diese Kurzschlußwicklung durch zwei achsengleich über den Stromwicklungen auf dem Eiselikern jedes Elementes angeordneten, miteinandet. kurzgeschlossenen Ausgleichswicklungen gebildet werden.The strongly pronounced stray fields caused by this arrangement should now be destroyed in a manner known per se by a short-circuit winding, namely, according to the invention, this short-circuit winding should be axially aligned by two arranged above the current windings on the iron core of each element, with one another. short-circuited compensation windings are formed.
In der Zeichnung ist der Erfindungsgegenstand in Abb. i für einen Stromwandler in Kettenschaltung schematisch dargestellt, während Abb. 2 ein die Wirkungsweise der Anordnung nach Abb. i erläuterndes Vektordiagramm dargestellt.In the drawing, the subject of the invention in Fig. I is for a Current transformers in a daisy chain are shown schematically, while Fig. 2 shows the The mode of operation of the arrangement is shown in the explanatory vector diagram in Fig. I.
Der Stromwandler 1 besteht aus zwei Elementen mit den Eisenkernen f, f, die durch die induzierten Wicklungen W,'-W." und nuiteinander elektromagnetisch verkettet sind. - Zur Vermeidung der Streuung sind erfindungsgemäß die Ausgleichswicklungen u' und W' von gleicher oder annähernd gleicher Windungszahl angeordnet. In der Zeichnung sind der Deutlichkeit halber die Ausgleichswicklungen neben den Wicklungen W#", li,'2' und W2" dargestellt. In Wirklichkeit ,sind dieselben achsengleich über die Hauptwicklungen gelagert, um deren Streufelder möglichst vollkommen aufzunehmen.The current transformer 1 is comprised of two elements with the iron cores f, f by the induced windings W, '-. "W and nuiteinander concatenated electromagnetically are -. In order to avoid the dispersion of the compensation windings are according to the invention u' and W 'of the same or approximately For the sake of clarity, the drawing shows the compensating windings next to the windings W # ", li," 2 "and W2".
Die Verschiedenheit der magnetischen Flüsse, welche W,' und'W," bzw. W,' und W2" umschließen, erzeugt im Stromkreis der einander entgegengesetzt - geschalteten Spulen u' und u" einen Ausgleichstrorn, welcher diese Verschiedenheit aufzuheben trachtet.The difference of the magnetic fluxes which W 'und'W, "and W' and W2 'enclose generated in the circuit of oppositely - connected coils u' and u", which seeks cancel this difference a Ausgleichstrorn.
In Abb. 2 ist das Ströme- und Spannungs-Schaubild dargestellt. J, bedeutet den Primär-Strom, J., den Sekundärstrom und J, den Magnetisierungsstrom. Die durch die Streuflüsse von J,. und J, erzeugten Spannungen Eu, und Eu, ergeben eine resultierende Spannung Eu. Die beiden Streuspannungen stehen auf den Vektorrichtungen der Streuflüsse bzw. der sie erzeugenden Ströme senkrecht, so daß sich diese Spannungen nahezu arithmetisch addieren. Der hierdurch hervorgerufene Kurzschlußstrom wird daher bestrebt sein, das äußere Streufeld der primären wie der sekundären Wicklung möglichst abzublasen. Die Streufeldverteilung wird daher nunmehr nahezu der Anordnung eines Transformators mit nahe übereinanderliegenden Wicklungen entsprechen.The current and voltage diagram is shown in Fig. 2. J, means the primary current, J., the secondary current and J, the magnetizing current. The by the leakage flux of J ,. and J, generated stresses Eu, and Eu, result in a resultant stress Eu. The two stray voltages are perpendicular to the vector directions of the stray fluxes or the currents that generate them, so that these voltages add up almost arithmetically. The short-circuit current caused by this will therefore endeavor to blow off the external stray field of the primary as well as the secondary winding as much as possible. The stray field distribution will therefore now almost correspond to the arrangement of a transformer with windings lying close to one another.
Die Verluste in den Ausgleichspulen sind verhältnismäßig gering, weil nur ein Teil des gesamten Stromes durch dieselben fließt.The losses in the compensation coils are relatively low because only part of the total current flows through them.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP43369D DE386211C (en) | 1921-12-07 | 1921-12-07 | Current transformer for high voltage alternating currents |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP43369D DE386211C (en) | 1921-12-07 | 1921-12-07 | Current transformer for high voltage alternating currents |
Publications (1)
Publication Number | Publication Date |
---|---|
DE386211C true DE386211C (en) | 1923-12-15 |
Family
ID=7379410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP43369D Expired DE386211C (en) | 1921-12-07 | 1921-12-07 | Current transformer for high voltage alternating currents |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE386211C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994028429A1 (en) * | 1993-06-01 | 1994-12-08 | Liaisons Electroniques-Mecaniques Lem S.A. | Method and device for measuring the dynamic components of an electric current in the presence of a continuous component |
-
1921
- 1921-12-07 DE DEP43369D patent/DE386211C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994028429A1 (en) * | 1993-06-01 | 1994-12-08 | Liaisons Electroniques-Mecaniques Lem S.A. | Method and device for measuring the dynamic components of an electric current in the presence of a continuous component |
FR2706040A1 (en) * | 1993-06-01 | 1994-12-09 | Lem | Current measurement method and device implementing this method. |
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