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EP0069284A1 - Arrangement for windings of double floor transformers - Google Patents

Arrangement for windings of double floor transformers Download PDF

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Publication number
EP0069284A1
EP0069284A1 EP82105582A EP82105582A EP0069284A1 EP 0069284 A1 EP0069284 A1 EP 0069284A1 EP 82105582 A EP82105582 A EP 82105582A EP 82105582 A EP82105582 A EP 82105582A EP 0069284 A1 EP0069284 A1 EP 0069284A1
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EP
European Patent Office
Prior art keywords
windings
parts
transformer
fine
stage
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Granted
Application number
EP82105582A
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German (de)
French (fr)
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EP0069284B1 (en
Inventor
Walter Müller
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Transformatoren Union AG
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Transformatoren Union AG
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Priority to AT82105582T priority Critical patent/ATE10044T1/en
Publication of EP0069284A1 publication Critical patent/EP0069284A1/en
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Publication of EP0069284B1 publication Critical patent/EP0069284B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings

Definitions

  • the invention relates to a circuit arrangement for the windings of double-deck transformers, each with two electrically parallel-acting undervoltage and high-voltage main windings arranged spatially one above the other on common core legs and with coarse and / or fine-stage windings that can be connected to the high-voltage main windings by means of turners, selectors and load switches.
  • double-deck transformers are sometimes used instead of two separate transformers which are separate from one another, the nominal power of each floor of a double-deck transformer being equal to the nominal power of one of these single transformers.
  • the manufacturing and operating costs of these double-deck transformers lie between the costs for two single transformers, the nominal power of which corresponds to the nominal floor power, and the costs for a single transformer, the nominal power of which is the sum of the powers of the single transformers.
  • double-deck transformers have the advantage, however, that, like two single transformers, they reduce the short-circuit power in each of the networks connected to the undervoltage.
  • the invention is therefore based on the object of specifying a circuit arrangement for double-deck transformers which, when using only a single tap changer, precludes the occurrence of compensating currents between the tap windings of the two transformer storeys and, owing to the possibility of using a single tap changer, a space and Guaranteed inexpensive construction of double-deck transformers.
  • this object is achieved in that only one common coarse and / or fine-stage winding is provided for the high-voltage main windings of both transformer levels assigned to the same phase, that approximately equal parts of each of the stages of the step windings are arranged in each of the two transformer levels. that these parts of the step windings are each electrically connected in series and that the parts of the step windings that are common to the two transformer levels are connected together to a selector and a load switch and, if appropriate, to a turner.
  • the high-voltage master windings of the two transformer levels are electrically connected in parallel with one another and electrically in series with the step windings are.
  • the tapping of the fine-stage winding via the selector and the load switch, which carries the load current is expediently at zero potential and the series connection of the fine-stage winding halves takes place via a selector contact terminal.
  • the winding conductor cross-section in the step winding halves is twice as large as the winding conductor cross-section in the high-voltage master windings.
  • the circuit arrangement according to the invention is very advantageous because, at the same time, it allows a very simple construction of the windings, in particular the step windings, and only a single step switching device is required for their implementation.
  • Undervoltage windings 2 and 3 high-voltage master windings 4 and 5 and coarse and fine-stage windings are arranged around a core 1 which is layered in the usual manner from sheet metal.
  • the two low-voltage windings 2 and 3 like the two high-voltage master windings 4 and 5, are arranged spatially axially one above the other.
  • the two undervoltage windings 2 and 3 are completely electrically isolated from one another and serve to supply independent undervoltage networks.
  • the two high-voltage master windings 4 and 5 are electrically connected in parallel with one another and electrically connected in series with the step windings.
  • the coarse stage winding is made up of two coarse stage winding halves 6 and 7 and the fine stage winding is made up of parts 9 and 10 of approximately the same size for each of the stages.
  • One 9 of the parts 9 and 10 of each stage is on the upper floor and the other part 10 is arranged on the lower floor of the transformer.
  • the winding ends of the parts 9 are connected to the winding inputs of the parts 10 and both the winding ends of the parts 10 and the winding inputs of the parts 9 are connected to terminals of taps 11.
  • the coarse stage winding halves 6 and 7 and the parts 9 and 10 of the fine stage winding are each arranged spatially axially one above the other and thus represent winding tubes with very small radial dimensions. Both the coarse stage winding halves 6 and 7 and the parts 9 and 10 of the fine stage winding are due to their relatively low
  • the number of turns and the winding conductor cross-section which is about twice as large as that of the winding conductor cross-section in the high-voltage master windings 6, 7, can be easily manufactured in terms of production technology.
  • a turner -8 and a selector with load switch 12 are provided for the electrical connection of the coarse and fine stage winding.
  • the load line emanating from the load switch 12 is in the usual way, for example by grounding, at zero potential and forms a star point with the load lines emanating from the load switches 12 of the other phase. But it is also possible to connect the load lines to a delta connection.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

1. A connection arrangement for the windings of double floor transformers, having two secondary windings (2, 3) and two primary main windings (4, 5) which, in each case, operate in an electrically parallel manner and are arranged spatially one above another on common core limbs (1), and having coarse (6, 7) and/or fine stepped windings (9, 10) which can be connected to the primary main windings (4, 5) by reversers (8), selectors and load switches (12), characterised in - that only one common coarse (6, 7) and/or fine stepped winding (9, 10) is respectively provided for the primary main windings (4, 5) of both transformer floors which are assigned to the same phase ; - that on each of the two transformer floors, there are arranged parts (6, 9 and 7, 10) of each of the steps of the stepped windings of about the same size ; - that the parts (6, 7 and 9, 10) of the steps of the stepped windings are in each case electrically connected in series to one another, and - that each of the parts (6, 7 and 9, 10) of the stepped windings, which are common to the two transformer floors, are commonly connected to a selector and a load switch (12), and possibly to a reverser (8).

Description

Die Erfindung betrifft eine Schaltungsanordnung für die Wicklungen von Doppelstocktransformatoren mit je zwei elektrisch parallel wirkenden und räumlich übereinander auf gemeinsamen Kernschenkeln angeordneten Unterspannungs- und Oberspannungs-Stammwicklungen und mit durch Wender, Wähler und Lastschalter mit den Oberspannungs- stammwicklungen verschaltbaren Grob- und/oder Feinstufenwicklungen.The invention relates to a circuit arrangement for the windings of double-deck transformers, each with two electrically parallel-acting undervoltage and high-voltage main windings arranged spatially one above the other on common core legs and with coarse and / or fine-stage windings that can be connected to the high-voltage main windings by means of turners, selectors and load switches.

Derartige Doppelstocktransformatoren werden mitunter an Stelle von zwei, voneinander getrennten Einzeltransformatoren eingesetzt, wobei die Nennleistung jedes Stockwerks eines Doppelstocktransformators gleich der Nennleistung eines dieser Einzeltransformatoren ist. Die Herstellungs- und Betriebskosten dieser Doppelstocktransformatoren liegen zwischen den Kosten für zwei Einzeltransformatoren, deren Nennleistung gleich der Stockwerksnennleistung ist und den Kosten für einen Einzeltransformator, dessen Nennleistung gleich der Summe der Leistungen der Einzeltransformatoren ist. Gegenüber den Einzeltransformatoren haben Doppelstocktransformatoren jedoch den Vorteil, daß sie, wie zwei Einzeltransformatoren, in jedem der an die Unterspannung angeschlossenen Netze die Kurzschlußleistung herabsetzen.Such double-deck transformers are sometimes used instead of two separate transformers which are separate from one another, the nominal power of each floor of a double-deck transformer being equal to the nominal power of one of these single transformers. The manufacturing and operating costs of these double-deck transformers lie between the costs for two single transformers, the nominal power of which corresponds to the nominal floor power, and the costs for a single transformer, the nominal power of which is the sum of the powers of the single transformers. Compared to the single transformers, double-deck transformers have the advantage, however, that, like two single transformers, they reduce the short-circuit power in each of the networks connected to the undervoltage.

Zur Einstellung des Übersetzungsverhältnisses in den einzelnen Transformatorstockwerken der Doppelstocktransformatoren sind bisher zur Vermeidung von Ausgleichsströmen zwischen den Stufenwicklungen der beiden Stockwerke voneinander getrennte Wähler und Lastschalter mit lediglich gemeinsamen Antriebseinrichtungen eingesetzt worden. Nachteilig ist hierbei, daß dadurch sowohl der Raumbedarf als auch die Kosten für die Einstelleinrichtung ungünstig beeinflußt werden und dadurch die dem Doppelstocktransformator innewohnenden Vorteile nicht voll ausnutzbar sind.Up to now, in order to avoid compensation currents between the step windings of the two floors, separate selectors and load switches have been used to set the transmission ratio in the individual transformer storeys of the double-deck transformers have been used with only common drive devices. The disadvantage here is that both the space requirement and the costs for the setting device are adversely affected and the inherent advantages of the double-deck transformer cannot be fully exploited.

Der Erfindung liegt daher die Aufgabe zugrunde, für Doppelstocktransformatoren eine Schaltungsanordnung anzugeben, die bei Verwendung nur einer einzigen Stufenschalteinrichtung das Auftreten von Ausgleichsströmen zwischen den Stufenwicklungen der beiden Transformatorstockwerke ausschließt und die infolge der Möglichkeit, mit dem Einsatz einer einzigen Stufenschalteinrichtung auszukommen, einen raum- und kostengünstigen Aufbau von Doppelstocktransformatoren gewährleistet.The invention is therefore based on the object of specifying a circuit arrangement for double-deck transformers which, when using only a single tap changer, precludes the occurrence of compensating currents between the tap windings of the two transformer storeys and, owing to the possibility of using a single tap changer, a space and Guaranteed inexpensive construction of double-deck transformers.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß für die derselben Phase zugeordneten Oberspannungs- stammwicklungen beider Transformatorstockwerke jeweils nur eine gemeinsame Grob- und/oder Feinstufenwicklung vorgesehen ist, daß in jedem der beiden Transformatorstockwerke jeweils etwa gleich große Teile jeder der Stufen der Stufenwicklungen angeordnet sind, daß diese Teile der Stufenwicklungen jeweils untereinander elektrisch in Reihe geschaltet sind und daß die den beiden Transformatorstockwerken gemeinsamen Teile der Stufenwicklungen gemeinsam an je einen Wähler und einen Lastschalter und gegebenenfalls an einen Wender angeschlossen sind.According to the invention, this object is achieved in that only one common coarse and / or fine-stage winding is provided for the high-voltage main windings of both transformer levels assigned to the same phase, that approximately equal parts of each of the stages of the step windings are arranged in each of the two transformer levels. that these parts of the step windings are each electrically connected in series and that the parts of the step windings that are common to the two transformer levels are connected together to a selector and a load switch and, if appropriate, to a turner.

Gemäß vorteilhaften Weiterbildungen der erfindungsgemäßen Schaltungsanordnung ist vorgesehen, daß die Oberspannungsstammwicklungen der beiden Transformatorstockwerke untereinander elektrisch parallel und mit den Stufenwicklungen elektrisch in Reihe geschaltet sind. Dabei liegt zweckmäßig die jeweils den Laststrom führende Anzapfung der Feinstufenwicklung über den Wähler und den Lastschalter an Nullpotential und erfolgt die Reihenschaltung der Feinstufenwicklungshälften über eine Wählerkontaktklemme. Dabei ist der Wickelleiterquerschnitt in den Stufenwicklungshälften doppelt so groß wie der Wickelleiterquerschnitt in den Oberspannungsstammwicklungen.According to advantageous developments of the circuit arrangement according to the invention, it is provided that the high-voltage master windings of the two transformer levels are electrically connected in parallel with one another and electrically in series with the step windings are. In this case, the tapping of the fine-stage winding via the selector and the load switch, which carries the load current, is expediently at zero potential and the series connection of the fine-stage winding halves takes place via a selector contact terminal. The winding conductor cross-section in the step winding halves is twice as large as the winding conductor cross-section in the high-voltage master windings.

Die erfindungsgemäße Schaltungsanordnung ist sehr vorteilhaft, weil sie gleichzeitig einen sehr einfachen Aufbau der Wicklungen, insbesondere der Stufenwicklungen erlaubt und zu ihrer Realisierung außerdem nur eine einzige Stufenschalteinrichtung erforderlich ist.The circuit arrangement according to the invention is very advantageous because, at the same time, it allows a very simple construction of the windings, in particular the step windings, and only a single step switching device is required for their implementation.

Ein Ausführungsbeispiel der Erfindung wird anhand einer schematischen Darstellung in einer Zeichnung näher erläutert.An embodiment of the invention is explained in more detail with reference to a schematic representation in a drawing.

Um einen in üblicher Weise aus Blechen geschichteten Kern 1 sind von innen nach außen Unterspannungswicklungen 2 und 3, Oberspannungsstammwicklungen 4 und 5 sowie Grob- und Feinstufenwicklungen angeordnet. Die beiden Unterspannungswicklungen 2 und 3 sind ebenso wie die beiden Oberspannungsstammwicklungen 4 und 5 räumlich axial übereinander angeordnet.Undervoltage windings 2 and 3, high-voltage master windings 4 and 5 and coarse and fine-stage windings are arranged around a core 1 which is layered in the usual manner from sheet metal. The two low-voltage windings 2 and 3, like the two high-voltage master windings 4 and 5, are arranged spatially axially one above the other.

Die beiden Unterspannungswicklungen 2 und 3 sind galvanisch vollständig voneinander getrennt und dienen der Versorgung voneinander unabhängiger Unterspannungsnetze. Die beiden Oberspannungsstammwicklungen 4 und 5 sind ausgehend von einer gemeinsamen Hochspannungsklemme untereinander elektrisch parallel und mit den Stufenwicklungen elektrisch in Reihe geschaltet.The two undervoltage windings 2 and 3 are completely electrically isolated from one another and serve to supply independent undervoltage networks. Starting from a common high-voltage terminal, the two high-voltage master windings 4 and 5 are electrically connected in parallel with one another and electrically connected in series with the step windings.

Die Grobstufenwicklung ist aus zwei Grobstufenwicklungshälften 6 und 7 und die Feinstufenwicklung aus etwa gleich großen Teilen 9 und 10 für jede der Stufen aufgebaut. Je eines 9 der Teile 9 und 10 jeder Stufe ist im oberen Stockwerk und der jeweils andere Teil 10 ist im unteren Stockwerk des Transformators angeordnet. Dabei sind zur Reihenschaltung der Teile 9 und 10 der Feinstufen die Wicklungsenden der Teile 9 mit den Wicklungseingängen der Teile 10 und sowohl die Wicklungsenden der Teile 10 als auch die Wicklungseingänge der Teile 9 mit Klemmen von Anzapfungen 11 verbunden.The coarse stage winding is made up of two coarse stage winding halves 6 and 7 and the fine stage winding is made up of parts 9 and 10 of approximately the same size for each of the stages. One 9 of the parts 9 and 10 of each stage is on the upper floor and the other part 10 is arranged on the lower floor of the transformer. For the series connection of the parts 9 and 10 of the fine stages, the winding ends of the parts 9 are connected to the winding inputs of the parts 10 and both the winding ends of the parts 10 and the winding inputs of the parts 9 are connected to terminals of taps 11.

Die Grobstufenwicklungshälften 6 und 7 und die Teile 9 und 10 der Feinstufenwicklung sind jeweils räumlich axial übereinander angeordnet und stellen dadurch Wicklungsröhren mit sehr kleinen radialen Abmessungen dar. Sowohl die Grobstufenwicklungshälften 6 und 7 als auch die Teile 9 und 10 der Feinstufenwicklung sind infolge ihrer verhältnismäßig niedrigen Windungszahlen und des gegenüber dem Wickelleiterquerschnitt in den Oberspannungsstammwicklungen 6, 7 etwa doppelt so großen Wickelleiterquerschnittes fertigungstechnisch einfach herstellbar.The coarse stage winding halves 6 and 7 and the parts 9 and 10 of the fine stage winding are each arranged spatially axially one above the other and thus represent winding tubes with very small radial dimensions. Both the coarse stage winding halves 6 and 7 and the parts 9 and 10 of the fine stage winding are due to their relatively low The number of turns and the winding conductor cross-section, which is about twice as large as that of the winding conductor cross-section in the high-voltage master windings 6, 7, can be easily manufactured in terms of production technology.

Zur elektrischen Verschaltung der Grob- und Feinstufenwicklung ist ein Wender -8 und ein Wähler mit Lastschalter 12 vorgesehen. Dabei liegt in üblicher Weise die von dem Lastschalter 12 ausgehende Lastleitung, beispielsweise durch Erdung, an Nullpotential und bildet mit den von den Lastschaltern 12 der anderen Phase ausgehenden Lastleitungen einen Sternpunkt. Es ist aber auch möglich, die Lastleitungen zu einer Dreieckschaltung zu verbinden.A turner -8 and a selector with load switch 12 are provided for the electrical connection of the coarse and fine stage winding. The load line emanating from the load switch 12 is in the usual way, for example by grounding, at zero potential and forms a star point with the load lines emanating from the load switches 12 of the other phase. But it is also possible to connect the load lines to a delta connection.

Claims (5)

1. Schaltungsanordnung für die Wicklungen von Doppelstocktransformatoren mit je zwei elektrisch parallel wirkenden und räumlich übereinander auf gemeinsamen Kernschenkeln angeordneten Unterspannungs- und Oberspannungsstammwicklungen und mit durch Wender, Wähler und Lastschalter mit den Oberspannungsstammwicklungen verschaltbaren Grob- und/oder Feinstufenwicklungen, dadurch gekennzeichnet , - daß für die derselben Phase zugeordneten Oberspannungs- stammwicklungen (4, 5) beider Transformatorstockwerke jeweils nur eine gemeinsame Grob- und/oder Feinstufenwicklung vorgesehen ist, - daß in jedem der beiden Transformatorstockwerke jeweils etwa gleich große Teile (6, 9 bzw. 7, 10) jeder der Stufen der Stufenwicklungen angeordnet sind, - daß die Teile (6, 7 bzw. 9, 10) der Stufen der Stufenwicklungen jeweils untereinander elektrisch in Reihe geschaltet sind und - daß die den beiden Transformatorstockwerken gemeinsamen Teile (6, 7 bzw. 9, 10) der Stufenwicklungen gemeinsam an je einen Wähler und einen Lastschalter (12) und gegebenenfalls an je einen Wender (8) angeschlossen sind. 1. Circuit arrangement for the windings of double-decker transformers, each with two undervoltage and high-voltage master windings that act in parallel and spatially one above the other on common core legs and with coarse and / or fine-stage windings that can be connected to the high-voltage master windings by turners, selectors and load switches, characterized in that - that only one common coarse and / or fine-stage winding is provided for the high-voltage main windings (4, 5) of the two transformer levels assigned to the same phase, - that in each of the two transformer storeys parts of the same size (6, 9 or 7, 10) of each of the stages of the stage windings are arranged, - That the parts (6, 7 and 9, 10) of the stages of the stage windings are each electrically connected in series and - That the parts common to the two transformer levels (6, 7 and 9, 10) of the step windings are connected together to a selector and a load switch (12) and optionally to a turner (8). 2. Schaltungsanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Oberspannungs- stammwicklungen (4, 5) der beiden Transformatorstockwerke untereinander elektrisch parallel und mit den Teilen (6, 7 bzw. 9, 10) der Stufenwicklungen elektrisch in Reihe geschaltet sind.2. Circuit arrangement according to claim 1, characterized in that the high-voltage main windings (4, 5) of the two transformer storeys are electrically connected in parallel with one another and with the parts (6, 7 and 9, 10) of the step windings are electrically connected in series. 3. Schaltungsanordnung nach Anspruch 1 und 2, da- durch gekennzeichnet , daß die jeweils den Laststrom führende Anzapfung (11) der Feinstufenwicklung über den Wähler und Lastschalter (12) an Nullpotential liegt.3. Circuit arrangement according to claim 1 and 2, characterized in that the tapping (11) of the fine-stage winding, which carries the load current in each case, is at zero potential via the selector and load switch ( 1 2). 4. Schaltungsanordnung nach Anspruch 1 bis 3, da- durch gekennzeichnet, daß der Wickelleiterquerschnitt in den Teilen (6, 7 bzw. 9, 10) der Stufenwicklungen für den Summenstrom der Oberspannungsstammwicklungen bemessen ist.4. Circuit arrangement according to claim 1 to 3, characterized in that the winding conductor cross-section in the parts (6, 7 and 9, 10) of the step windings is dimensioned for the total current of the high-voltage main windings. 5. Schaltungsanordnung nach Anspruch 1 bis 4, da- durch gekennzeichnet , daß die Reihenschaltung der Teile (9, 10) der Feinstufenwicklung über Wählerkontaktklemmen erfolgt.5. Circuit arrangement according to claim 1 to 4, characterized in that the series connection of the parts (9, 10) of the fine-stage winding takes place via selector contact terminals.
EP82105582A 1981-07-08 1982-06-24 Arrangement for windings of double floor transformers Expired EP0069284B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82105582T ATE10044T1 (en) 1981-07-08 1982-06-24 CIRCUIT ARRANGEMENT FOR THE WINDINGS OF TWO-tier TRANSFORMERS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3126972 1981-07-08
DE3126972A DE3126972C2 (en) 1981-07-08 1981-07-08 Circuit arrangement for the windings of a double-deck transformer

Publications (2)

Publication Number Publication Date
EP0069284A1 true EP0069284A1 (en) 1983-01-12
EP0069284B1 EP0069284B1 (en) 1984-10-24

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EP82105582A Expired EP0069284B1 (en) 1981-07-08 1982-06-24 Arrangement for windings of double floor transformers

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EP (1) EP0069284B1 (en)
JP (1) JPS5816514A (en)
AT (1) ATE10044T1 (en)
DE (1) DE3126972C2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141296A1 (en) * 1983-10-20 1985-05-15 Siemens Aktiengesellschaft Circuit arrangement for the wiring of high power transformers
EP2302648A1 (en) * 2008-06-18 2011-03-30 TBEA Shenyang Transformer Group Co., Ltd Self power-acquiring quickly responsive controllable electric reactor
CN113421753A (en) * 2021-06-30 2021-09-21 保定天威集团特变电气有限公司 Transformer convenient to promote single capacity

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
US4533892A (en) * 1982-06-23 1985-08-06 Hitachi, Ltd. Split structure type transformer

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DE1638379B2 (en) * 1967-05-11 1972-11-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt CIRCUIT ARRANGEMENT FOR A STEPPED TRANSFORMER
DE2944812A1 (en) * 1978-11-06 1980-05-14 Hitachi Ltd THREE-WINDING TRANSFORMER

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DE1258967B (en) 1960-11-28 1968-01-18 Licentia Gmbh Transformer with several main winding parts lying next to one another in the axial direction
FR1303841A (en) 1961-10-16 1962-09-14 Licentia Gmbh Winding device comprising two parts spaced apart from each other and placed vertically one below the other for series-parallel assembly
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DE1638379B2 (en) * 1967-05-11 1972-11-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt CIRCUIT ARRANGEMENT FOR A STEPPED TRANSFORMER
DE2944812A1 (en) * 1978-11-06 1980-05-14 Hitachi Ltd THREE-WINDING TRANSFORMER

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Title
F. ANDE "Betrieb und Anwendung von Leistungs- und Regeltransformatoren, 1954 SPRINGER-VERLAG, Berlin/Gottingen/Heidelberg (BRD) Seiten 114-118 *
R. RICHTER "Elektrische Maschinen", Band 3: Die Transformatoren, 1954 VERLAG BIRKHAUSER, Basel/Stuttgart Seiten 254-262 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141296A1 (en) * 1983-10-20 1985-05-15 Siemens Aktiengesellschaft Circuit arrangement for the wiring of high power transformers
EP2302648A1 (en) * 2008-06-18 2011-03-30 TBEA Shenyang Transformer Group Co., Ltd Self power-acquiring quickly responsive controllable electric reactor
EP2302648A4 (en) * 2008-06-18 2013-10-09 Tbea Shenyang Transformer Gp Self power-acquiring quickly responsive controllable electric reactor
CN113421753A (en) * 2021-06-30 2021-09-21 保定天威集团特变电气有限公司 Transformer convenient to promote single capacity

Also Published As

Publication number Publication date
DE3126972C2 (en) 1985-05-09
DE3126972A1 (en) 1983-01-27
ATE10044T1 (en) 1984-11-15
JPS5816514A (en) 1983-01-31
EP0069284B1 (en) 1984-10-24

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