DE386211C - Current transformer for high voltage alternating currents - Google Patents

Current transformer for high voltage alternating currents

Info

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
Application number
DEP43369D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DEP43369D priority Critical patent/DE386211C/en
Application granted granted Critical
Publication of DE386211C publication Critical patent/DE386211C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/42Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
    • H01F27/422Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers
    • H01F27/427Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers for current transformers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20Instruments transformers
    • H01F38/22Instruments transformers for single phase ac
    • H01F38/28Current transformers
    • H01F38/32Circuit 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)

PATENT-ANSPRUCII: Stromwandler für hochgespannte Wechselströme, der aus mehreren in Reihe geschalteten Elementen besteht von denen jedes einen gegen Erde isolierten Eisenkern und zwei vom Eisenkern gegen Hochspannung isolierte Stromwicklungen besitzt, die getrennt auf je einem Schen-kel des Eisenkernes angeordnet sind, dadurch gekennzeichnet, daß der Eisenkern jedes Elementes mit zwei achsengleich über den Stromwicklungen angeordneten, miteinander kurzgeschlossenen Ausgleichswicklungen (u', u") versehen ist, die mit den beiden gegen Hochspannung isolierten Stromwicklungen elektromagnetisch verkettet und einander entgegengesetzt geschaltet sind, zum Zweck -der Vernichtung der Streufelder. PATENT ANSPRUCII: current transformer for high-tension AC currents, the switched of a plurality of series elements consisting each of which an insulated against earth iron core and two insulated from the iron core against high voltage current windings has, separated kel on each one Schen- of the iron core are arranged, characterized that the iron core of each element is provided with two equal-axis over the current windings, short-circuited equalizing windings (u ', u "), which are electromagnetically linked to the two current windings isolated from high voltage and connected in opposite directions for the purpose of destroying the stray fields .
DEP43369D 1921-12-07 1921-12-07 Current transformer for high voltage alternating currents Expired DE386211C (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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