EP0075796B1 - Transformer with windings embedded in cast resin - Google Patents

Transformer with windings embedded in cast resin Download PDF

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Publication number
EP0075796B1
EP0075796B1 EP82108563A EP82108563A EP0075796B1 EP 0075796 B1 EP0075796 B1 EP 0075796B1 EP 82108563 A EP82108563 A EP 82108563A EP 82108563 A EP82108563 A EP 82108563A EP 0075796 B1 EP0075796 B1 EP 0075796B1
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EP
European Patent Office
Prior art keywords
voltage winding
cast resin
transformer
channels
resin body
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Expired
Application number
EP82108563A
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German (de)
French (fr)
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EP0075796A1 (en
Inventor
Richard Dr. Pfeiffer
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Transformatoren Union AG
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Transformatoren Union AG
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Priority to AT82108563T priority Critical patent/ATE17172T1/en
Publication of EP0075796A1 publication Critical patent/EP0075796A1/en
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Publication of EP0075796B1 publication Critical patent/EP0075796B1/en
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    • 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
    • H01F27/33—Arrangements for noise damping
    • 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/20—Cooling by special gases or non-ambient air
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating
    • H01F2027/328—Dry-type transformer with encapsulated foil winding, e.g. windings coaxially arranged on core legs with spacers for cooling and with three phases

Definitions

  • the invention relates to transformers with an iron core and with an undervoltage winding located radially radially between the high-voltage winding and the core leg, the high-voltage winding and the undervoltage winding each being embedded in a first and a second cast resin body holding and isolating the windings, and cooling channels being arranged in both cast resin bodies, which are flowed through by an electrically insulating, liquid coolant.
  • electrically conductive water serves as the coolant.
  • This electrically conductive water advantageously serves at the same time as electrical shielding, but limits the use of the known arrangement to transformers with relatively low nominal voltages, because the use in transformers for higher nominal voltages requires uneconomically large wall thicknesses for the cast resin bodies. Due to large wall thicknesses, the cast resin bodies are also relatively susceptible to cracking and act in an undesirable manner as thermal insulators.
  • a cast resin transformer in which all windings of a three-phase system are enclosed in a cast resin block, which on the one hand has openings for receiving the core legs of an iron core and, in addition, a trough for receiving one each in front of the end faces of the windings has lower and upper yokes.
  • the troughs receiving the yokes are sealed off from the outside by caps.
  • the invention is based on the object of providing an arrangement for cast-resin-insulated transformers which, on the one hand, enables effective construction to achieve a compact structure for larger nominal powers and, moreover, also allows use at higher nominal voltages.
  • a liquid is expediently chosen as the coolant, the boiling temperature of which, at the operating pressure provided in the cooling channels, is close to the operating temperature of the transformer windings.
  • SF 6 which is under pressure, serves as the insulating gas in the additional channels and that the cooling channels and the additional channels are each connected to an independent channel system, the internal pressure of which is assigned to a respective heat exchanger and / or reserve tank associated with the respective channel system is adjustable.
  • transformers according to the invention is very advantageous because, by reducing the amount of cast resin required and the absolute winding dimensions, it enables the construction of cast-resin-insulated transformers for larger nominal powers and also their use at higher than previously controllable nominal voltages.
  • a core leg 1 is surrounded by an undervoltage winding 2.
  • the core leg 1 is layered in a known manner from sheet metal lamellae and connected in a manner not shown in more detail via yokes 3 to further core legs 1 of a three-phase transformer.
  • the actual undervoltage winding 2 consists of sheet metal strip, the width of which is equal to the winding length and, after winding, is cast into a body 4 made of casting resin. 2 cooling channels 5 are provided in and around the undervoltage winding.
  • a high-voltage winding which in turn comprises undervoltage winding 2, is constructed from a large number of coils 6 arranged axially one above the other.
  • the individual coils 6 are wound from coil-wide sheet metal strip and electrically connected in series.
  • the coils 6 are mechanically connected to one another by a body 7 made of cast resin.
  • the body 7 and the coils 6 together form a grid of radial cooling channels 8 and axial cooling channels 9.
  • the annular end faces of the body 7 comprising the coils 6 are gas-tightly covered by locking rings 10, 10 sealing rings 12 being clamped between the body 7 and the locking rings.
  • the cavity the locking rings 10 is connected via channels 11 to the grid from the cooling channels 8 and 9 and at the same time serves as a collecting chamber for the supply and discharge of the coolant into the high-voltage winding.
  • the iron core from the core legs 1 and the yokes 3 as well as the undervoltage winding 2 in the body 4 and the high-voltage winding in the body 7 constructed from the coils 6 are encapsulated to the outside by a jacket 14 and a cover 13.
  • the jacket 14 forms with the outer jacket of the body 7 and the cover 13 with the locking rings 10 channels 15, which are kept open by spacers, not shown, preferably molded onto the existing cast resin body.
  • support walls 17 are provided for clamping the undervoltage winding 2.
  • channel extensions 16 are located between them and the outer wall of the associated cover, which are directly connected to the channels 15.
  • the support walls 17 form chambers 18 in front of the end faces of the undervoltage winding 2.
  • the chambers 18 are connected to the cooling channels 5 in the undervoltage winding 2 and open in the direction of the core legs 1 and the yokes 3 and serve as coolant collecting containers for the removal and supply of Coolant for the undervoltage winding 2 and the iron core.
  • the contact surfaces between the covers 13 and the jacket 14 and between the support walls 17 and the body 4 carrying the undervoltage winding 2 are not directly on top of one another, but instead press sealing rings 12, by means of which the gaps between these components are sealed gas-tight.
  • This makes it possible to fill the channels 15 and the channel extensions 16 with a pressurized insulating gas, for example SF 6 , so that even high nominal electrical voltages on the high-voltage winding are safely controlled.
  • the iron core from the core legs 1 and the yokes 3 is resiliently clamped between the covers 13 and is thus decoupled from the windings in terms of vibration technology.
  • the chambers in the closure rings 10 and the chambers 18 are connected in a manner not shown with a compensating vessel and with a recooling device for the coolant flowing through the cooling channels 5, 8 and 9.
  • a non-flammable liquid is expediently used as the coolant, the boiling temperature of which, at the operating pressure provided in the channels, is close to the operating temperature of the transformer windings.

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

Abstract

Transformer, including an iron core, high voltage and low voltage windings, at least one cast resin body completely embedding, holding and insulating the windings, the cast resin body having cooling channels formed therein and having additional channels formed therein being separated from the cooling channels, and insulating gas filling the additional channels.

Description

Die Erfindung betrifft Transformatoren mit Eisenkern sowie mit räumlich radial zwischen der Oberspannungswicklung und dem Kernschenkel liegender Unterspannungswicklung, wobei die Oberspannungswicklung und die Unterspannungswicklung jeweils in einen ersten bzw. einen zweiten, die Wicklungen haltenden und isolierenden Gießharzkörper eingebettet sind und in beiden Gießharzkörpern Kühlkanäle angeordnet sind, die von einem elektrisch isolierenden, flüssigen Kühlmittel durchströmt sind.The invention relates to transformers with an iron core and with an undervoltage winding located radially radially between the high-voltage winding and the core leg, the high-voltage winding and the undervoltage winding each being embedded in a first and a second cast resin body holding and isolating the windings, and cooling channels being arranged in both cast resin bodies, which are flowed through by an electrically insulating, liquid coolant.

In einer derartigen durch die DE-C-2 032 507 bekannten Anordnung dient als Kühlmittel elektrisch leitfähiges Wasser. Dieses elektrisch leitfähige Wasser dient zwar vorteilhafterweise gleichzeitig als elektrische Abschirmung, beschränkt jedoch die Anwendung der bekannten Anordnung auf Transformatoren mit verhältnismäßig niedrigen Nennspannungen, denn der Einsatz in Transformatoren für höhere Nennspannung erfordert unwirtschaftlich große Wanddicken für die Gießharzkörper. Durch große Wanddicken werden darüber hinaus die Gießharzkörper verhältnismäßig rißanfällig und wirken in unerwünschter Weise als thermische Isolatoren.In such an arrangement known from DE-C-2 032 507, electrically conductive water serves as the coolant. This electrically conductive water advantageously serves at the same time as electrical shielding, but limits the use of the known arrangement to transformers with relatively low nominal voltages, because the use in transformers for higher nominal voltages requires uneconomically large wall thicknesses for the cast resin bodies. Due to large wall thicknesses, the cast resin bodies are also relatively susceptible to cracking and act in an undesirable manner as thermal insulators.

Durch die DE-A-2 826 299 ist ein Gießharztransformator bekannt, bei dem alle Wicklungen eines Drehstromsystems in einen Gießharzblock eingeschlossen sind, der einerseits Durchbrüche zur Aufnahme der Kernschenkel eines Eisenkerns aufweist und darüber hinaus vor den Stirnseiten der Wicklungen je eine Mulde zur Aufnahme eines unteren und oberen Joches hat. Die die Joche aufnehmenden Mulden sind bei dieser Anordnung durch Kappen wasserdicht nach außen hin abgeschlossen. In Folge der fehlenden Kühlung innerhalb der Wicklungen und des Kernes ist der Einsatz derartig gestalteter Transformatoren auf verhältnismäßig kleine Nennleistungen beschränkt.From DE-A-2 826 299 a cast resin transformer is known, in which all windings of a three-phase system are enclosed in a cast resin block, which on the one hand has openings for receiving the core legs of an iron core and, in addition, a trough for receiving one each in front of the end faces of the windings has lower and upper yokes. In this arrangement, the troughs receiving the yokes are sealed off from the outside by caps. As a result of the lack of cooling within the windings and the core, the use of transformers designed in this way is limited to relatively low nominal powers.

Der Erfindung liegt nun die Aufgabe zugrunde, für gießharzisolierte Transformatoren eine Anordnung zu schaffen, die einerseits durch Einsatz einer wirksamen Kühlung einen kompakten Aufbau auch für größere Nennleistungen und darüber hinaus auch den Einsatz bei höheren Nennspannungen ermöglicht.The invention is based on the object of providing an arrangement for cast-resin-insulated transformers which, on the one hand, enables effective construction to achieve a compact structure for larger nominal powers and, moreover, also allows use at higher nominal voltages.

Erfindungsgemäß wird diese Aufgabe für einen Transformator der eingangs genannten Art dadurch gelöst,

  • - daß die in den ersten Gießharzkörper eingebettete Oberspannungswicklung im Inneren von axial und eventuell radial verlaufenden Kühlkanälen durchsetzt ist und außerhalb des Gießharzkörpers allseitig von zusätzlichen, mit Isoliergas gefüllten Kanälen umgeben ist,
  • - daß die in den zweiten, für die Unterspannungswicklung und den Eisenkern gemeinsamen Gießharzkörper eingebettete Unterspannungswicklung lediglich von axial verlaufenden Kühlkanälen durchsetzt ist, und außerhalb des Gießharzkörpers nur auf ihrer Außenmantelfläche und an ihren Stirnseiten zusätzliche, mit Isoliergas gefüllte Kanäle aufweist und
  • - daß die Anschlußleiter der Oberspannungswicklung derart in den zusätzlichen Kanälen geführt sind, daß sie weitgehend von dem Isoliergas umgeben sind.
According to the invention, this object is achieved for a transformer of the type mentioned at the outset by
  • that the high-voltage winding embedded in the first cast resin body is penetrated in the interior by axially and possibly radially extending cooling channels and is surrounded on all sides outside the cast resin body by additional channels filled with insulating gas,
  • - That the embedded in the second, for the low-voltage winding and the iron core common resin resin under-voltage winding is only penetrated by axially extending cooling channels, and outside of the resin body only on its outer surface and on its end faces has additional channels filled with insulating gas and
  • - That the connecting conductors of the high-voltage winding are guided in the additional channels in such a way that they are largely surrounded by the insulating gas.

In dieser Anordnung wird zweckmäßigerweise als Kühlmittel eine Flüssigkeit gewählt, deren Siedetemperatur bei dem in den Kühlkanälen vorgesehenen Betriebsdruck in der Nähe der Betriebstemperatur der Transformatorwicklungen liegt.In this arrangement, a liquid is expediently chosen as the coolant, the boiling temperature of which, at the operating pressure provided in the cooling channels, is close to the operating temperature of the transformer windings.

Zweckmäßige Weiterbildungen der Erfindung bestehen darin, daß als Isoliergas in den zusätzlichen Kanälen unter Überdruck stehendes SF6 dient und daß die Kühlkanäle und die zusätzlichen Kanäle zu je einem selbständigen Kanalsystem verbunden sind, dessen Innendruck an je einem dem jeweiligen Kanalsystem zugeordneten Wärmetauscher und/oder Reservebehälter einstellbar ist.Expedient developments of the invention consist in that SF 6, which is under pressure, serves as the insulating gas in the additional channels and that the cooling channels and the additional channels are each connected to an independent channel system, the internal pressure of which is assigned to a respective heat exchanger and / or reserve tank associated with the respective channel system is adjustable.

Der erfindungsgemäße Aufbau von Transformatoren ist sehr vorteilhaft, weil er durch Verringerung der erforderlichen Gießharzmenge und der absoluten Wicklungsabmessungen den Bau von gießharzisolierten Transformatoren für größere Nennleistungen ermöglicht und auch deren Einsatz bei höheren als bisher beherrschbaren Nennspannungen.The construction of transformers according to the invention is very advantageous because, by reducing the amount of cast resin required and the absolute winding dimensions, it enables the construction of cast-resin-insulated transformers for larger nominal powers and also their use at higher than previously controllable nominal voltages.

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

Ein Kernschenkel 1 wird von einer Unterspannungswicklung 2 umfaßt. Der Kernschenkel 1 ist in bekannter Weise aus Blechlamellen geschichtet und in nicht näher dargestellter Art und Weise über Joche 3 mit weiteren Kernschenkeln 1 eines Drehstromtransformators verbunden.A core leg 1 is surrounded by an undervoltage winding 2. The core leg 1 is layered in a known manner from sheet metal lamellae and connected in a manner not shown in more detail via yokes 3 to further core legs 1 of a three-phase transformer.

Die eigentliche Unterspannungswicklung 2 besteht aus Blechband, dessen Breite gleich der Wicklungslänge ist und ist nach dem Wickeln in einen Körper 4 aus Gießharz eingegossen. Dabei sind in und um die Unterspannungswicklung 2 Kühlkanäle 5 vorgesehen.The actual undervoltage winding 2 consists of sheet metal strip, the width of which is equal to the winding length and, after winding, is cast into a body 4 made of casting resin. 2 cooling channels 5 are provided in and around the undervoltage winding.

Eine ihrerseits wieder die Unterspannungswicklung 2 umfassende Oberspannungswicklung ist aus einer Vielzahl von axial übereinander angeordneten Spulen 6 aufgebaut. Die einzelnen Spulen 6 sind aus spulenbreitem Blechband gewickelt und elektrisch in Reihe geschaltet. Die Spulen 6 sind durch einen Körper 7 aus Gießharz mechanisch miteinander verbunden. Der Körper 7 und die Spulen 6 bilden gemeinsam ein Gitter aus radialen Kühlkanälen 8 und axialen Kühlkanälen 9.A high-voltage winding, which in turn comprises undervoltage winding 2, is constructed from a large number of coils 6 arranged axially one above the other. The individual coils 6 are wound from coil-wide sheet metal strip and electrically connected in series. The coils 6 are mechanically connected to one another by a body 7 made of cast resin. The body 7 and the coils 6 together form a grid of radial cooling channels 8 and axial cooling channels 9.

Die kreisringförmigen Stirnflächen des die Spulen 6 umfassenden Körpers 7 sind durch Verschlußringe 10 gasdicht abgedeckt, wobei zwischen dem Körper 7 und den Verschlußringen 10 Dichtringe 12 eingespannt sind Der Hohlraum der Verschlußringe 10 steht über Kanäle 11 mit dem Gitter aus den Kühlkanälen 8 und 9 in Verbindung und dient gleichzeitig als Sammelkammer bei der Zu- und Ableitung des Kühlmittels in die Oberspannungswicklung.The annular end faces of the body 7 comprising the coils 6 are gas-tightly covered by locking rings 10, 10 sealing rings 12 being clamped between the body 7 and the locking rings. The cavity the locking rings 10 is connected via channels 11 to the grid from the cooling channels 8 and 9 and at the same time serves as a collecting chamber for the supply and discharge of the coolant into the high-voltage winding.

Der Eisenkern aus den Kernschenkeln 1 und den Jochen 3 sowie die Unterspannungswicklung 2 in dem Körper 4 und die aus den Spulen 6 aufgebaute Oberspannungswicklung im Körper 7 sind durch einen Mantel 14 und durch Deckel 13 nach außen hin abgekapselt. Dabei bildet der Mantel 14 mit dem äußeren Mantel des Körpers 7 sowie die Deckel 13 mit den Verschlußringen 10 Kanäle 15, die durch nicht dargestellte, vorzugsweise an die vorhandenen Gießharzkörper angeformte, Distanzstücke offengehalten werden.The iron core from the core legs 1 and the yokes 3 as well as the undervoltage winding 2 in the body 4 and the high-voltage winding in the body 7 constructed from the coils 6 are encapsulated to the outside by a jacket 14 and a cover 13. The jacket 14 forms with the outer jacket of the body 7 and the cover 13 with the locking rings 10 channels 15, which are kept open by spacers, not shown, preferably molded onto the existing cast resin body.

Auf der Innenseite der Deckel 13 sind Stützwände 17 zum Einspannen der Unterspannungswicklung 2 vorgesehen. Durch entsprechende Gestaltung der Stützwände 17 befinden sich zwischen diesen und der Außenwand des jeweils zugehörigen Deckels 13 Kanalfortsätze 16, die mit den Kanälen 15 direkt verbunden sind.On the inside of the cover 13, support walls 17 are provided for clamping the undervoltage winding 2. By appropriate design of the support walls 17 13 channel extensions 16 are located between them and the outer wall of the associated cover, which are directly connected to the channels 15.

Die Stützwände 17 bilden Kammern 18 vor den Stirnseiten der Unterspannungswicklung 2. Die Kammern 18 sind mit den Kühlkanälen 5 in der Unterspannungswicklung 2 verbunden und in Richtung auf die Kernschenkel 1 und die Joche 3 hin offen und dienen als Kühlmittelsammelbehälter für die Ab- und Zufuhr von Kühlmittel zur Unterspannungswicklung 2 und dem Eisenkern.The support walls 17 form chambers 18 in front of the end faces of the undervoltage winding 2. The chambers 18 are connected to the cooling channels 5 in the undervoltage winding 2 and open in the direction of the core legs 1 and the yokes 3 and serve as coolant collecting containers for the removal and supply of Coolant for the undervoltage winding 2 and the iron core.

Die Berührungsflächen zwischen den Deckeln 13 und dem Mantel 14 sowie zwischen den Stützwänden 17 und dem die Unterspannungswicklung 2 tragenden Körper 4 liegen nicht unmittelbar aufeinander, sondern pressen Dichtringe 12, durch die die Spalte zwischen diesen Bauteilen gasdicht verschlossen sind. Dadurch ist es möglich, die Kanäle 15 und die Kanalfortsätze 16 mit einem unter Überdruck stehenden Isoliergas, beispielsweise SF6, zu füllen, so daß auch hohe elektrische Nennspannungen an der Oberspannungswicklung sicher beherrscht sind.The contact surfaces between the covers 13 and the jacket 14 and between the support walls 17 and the body 4 carrying the undervoltage winding 2 are not directly on top of one another, but instead press sealing rings 12, by means of which the gaps between these components are sealed gas-tight. This makes it possible to fill the channels 15 and the channel extensions 16 with a pressurized insulating gas, for example SF 6 , so that even high nominal electrical voltages on the high-voltage winding are safely controlled.

Der Eisenkern aus den Kernschenkeln 1 und den Jochen 3 ist federnd zwischen den Deckeln 13 eingespannt und dadurch schwingungstechnisch von den Wicklungen entkoppelt.The iron core from the core legs 1 and the yokes 3 is resiliently clamped between the covers 13 and is thus decoupled from the windings in terms of vibration technology.

Die Kammern in den Verschlußringen 10 und die Kammern 18 sind in nicht dargestellter Weise mit einem Ausgleichsgefäß und mit einer Rückkühleinrichtung für das die Kühlkanäle 5, 8 und 9 durchströmende Kühlmittel verbunden.The chambers in the closure rings 10 and the chambers 18 are connected in a manner not shown with a compensating vessel and with a recooling device for the coolant flowing through the cooling channels 5, 8 and 9.

Als Kühlmittel dient dabei zweckmäßigerweise eine nicht brennbare Flüssigkeit, deren Siedetemperatur bei dem in den Kanälen vorgesehenen Betriebsdruck in der Nähe der Betriebstemperatur der Transformatorwicklungen liegt.A non-flammable liquid is expediently used as the coolant, the boiling temperature of which, at the operating pressure provided in the channels, is close to the operating temperature of the transformer windings.

Durch entsprechende Gestaltung und Bemessung der Körper 4 und 7 aus Gießharz sowie der mit Isoliergas gefüllten Kanäle 15 besteht die Möglichkeit, den Mantel 14 und die Deckel 13 zumindest teilweise aus elektrisch leitendem, metallischen Werkstoff herzustellen.By appropriate design and dimensioning of the body 4 and 7 made of cast resin and the channels 15 filled with insulating gas, there is the possibility of at least partially producing the jacket 14 and the cover 13 from an electrically conductive, metallic material.

Claims (4)

1. A transformer having an iron core (1) and a low voltage winding (2) which is spatially radially arranged between the high voltage winding (6) and the core limb, the high voltage winding (6) and the low voltage winding (2) being respectively embedded in a first and a second cast resin body (7, 4) which retain and insulate the windings, and cooling channels (5, 8, 9), through which an electrically-insulating, liquid coolant flows, being arranged in both cast resin bodies (2,6), characterised in
- that the high voltage winding (6) which is embedded in the first cast resin body (7), is penetrated by cooling channels (8, 9) which extend axially and possibly radially, and outside the cast resin body is surrounded an all sides by additional channels (15) which are filled with an insulating gas;
- that the low voltage winding (2) which is embedded in the second cast resin body (4) which is common to the low voltage winding (2) and the iron core (1, 3), is only penetrated by axially extending cooling channels (5), and outside the cast resin body it only has additional channels filled with an insulating gas on its outer shell surface and on its end faces; and
- that the terminals of the high voltage winding (6) are led in the additional channels (15, 16) in such a manner that they are largely surrounded by the insulating gas.
2. A transformer as claimed in Claim 1, characterised in that, as a coolant, a liquid is selected whose boiling point at the operating pressure provided in the cooling channels (5, 8, 9), lies in the vicinity of the operating temperature of the transformer windings.
3. A transformer as claimed in Claim 1 and 2, characterised in that SF6 which is under excess pressure is used as insulating gas in the additional channels (15, 16).
4. A transformer as claimed in Claim 1 to 3, characterised in that the cooling channels (5, 8, 9) and the additional channels (15, 16) are respectively connected to form an independent channel system, the internal pressure of which is adjustable at a heat exchanger and/or reserve tank which is assigned to the respective channel system.
EP82108563A 1981-09-30 1982-09-16 Transformer with windings embedded in cast resin Expired EP0075796B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82108563T ATE17172T1 (en) 1981-09-30 1982-09-16 TRANSFORMER WITH WINDINGS EMBEDDED IN RESIN.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813138909 DE3138909A1 (en) 1981-09-30 1981-09-30 TRANSFORMER WITH COMPLETELY EMBEDDED IN RESIN
DE3138909 1981-09-30

Publications (2)

Publication Number Publication Date
EP0075796A1 EP0075796A1 (en) 1983-04-06
EP0075796B1 true EP0075796B1 (en) 1985-12-27

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EP82108563A Expired EP0075796B1 (en) 1981-09-30 1982-09-16 Transformer with windings embedded in cast resin

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US (1) US4488134A (en)
EP (1) EP0075796B1 (en)
JP (1) JPS5871609A (en)
AT (1) ATE17172T1 (en)
DE (2) DE3138909A1 (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3229480A1 (en) * 1982-08-06 1984-02-09 Transformatoren Union Ag, 7000 Stuttgart DRY TRANSFORMER WITH WINDINGS POOLED IN CAST RESIN
CA1211169A (en) * 1984-04-03 1986-09-09 Nicolai Alexandrov Distribution transformer with woundmagnetic circuit
WO1992016955A1 (en) * 1991-03-21 1992-10-01 Siemens Aktiengesellschaft Process for producing cast resin coils and cast resin coils thus produced
US5383266A (en) * 1993-03-17 1995-01-24 Square D Company Method of manufacturing a laminated coil to prevent expansion during coil loading
US5396210A (en) * 1993-03-17 1995-03-07 Square D Company Dry-type transformer and method of manufacturing
US5267393A (en) * 1993-03-17 1993-12-07 Square D Company Method of manufacturing a strip wound coil to eliminate lead bulge
US5461772A (en) * 1993-03-17 1995-10-31 Square D Company Method of manufacturing a strip wound coil to reinforce edge layer insulation
US6204243B1 (en) 1993-09-01 2001-03-20 Novatis Ag Pharmaceutical preparations for the targeted treatment of crohn's disease and ulcerative colitis
JPH0997719A (en) * 1995-09-28 1997-04-08 Makoto Yamamoto Transformer structure
JP2001351820A (en) * 2000-06-07 2001-12-21 Mitsubishi Electric Corp Electric apparatus
US7023312B1 (en) 2001-12-21 2006-04-04 Abb Technology Ag Integrated cooling duct for resin-encapsulated distribution transformer coils
JP4466684B2 (en) * 2007-06-12 2010-05-26 トヨタ自動車株式会社 Reactor
AT507024B1 (en) * 2008-06-30 2011-10-15 Coil Holding Gmbh THROTTLE COIL FOR ELECTRIC POWER SUPPLY NETWORKS WITH REDUCED BARE MISSIONS
DE102008055882A1 (en) * 2008-11-03 2010-05-06 Siemens Aktiengesellschaft Holding device for a cast resin transformer winding
US7911308B2 (en) * 2008-11-26 2011-03-22 Rippel Wally E Low thermal impedance conduction cooled magnetics
US8118086B2 (en) 2009-06-16 2012-02-21 Uop Llc Efficient self cooling heat exchanger
US8631858B2 (en) * 2009-06-16 2014-01-21 Uop Llc Self cooling heat exchanger with channels having an expansion device
US8122946B2 (en) * 2009-06-16 2012-02-28 Uop Llc Heat exchanger with multiple channels and insulating channels
KR101707813B1 (en) * 2009-06-30 2017-02-27 에이비비 슈바이쯔 아게 Dry type transformer with improved cooling
US7834736B1 (en) 2009-07-31 2010-11-16 Abb Technology Ag Dry type pole-mounted transformer
ES2540817T3 (en) * 2009-10-19 2015-07-13 Abb Technology Ag Transformer
CN103026432A (en) 2010-04-07 2013-04-03 Abb技术有限公司 Outdoor dry-type transformer
US10826297B2 (en) * 2018-11-06 2020-11-03 General Electric Company System and method for wind power generation and transmission in electrical power systems

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA525065A (en) * 1956-05-15 K. Paluev Konstantin Cooling system for electrical apparatus
DE762171C (en) * 1937-11-17 1954-05-31 Siemens Schuckertwerke A G Disc coil winding for transformers wrapped on all sides with solid insulating materials
US2872651A (en) * 1955-11-29 1959-02-03 Gen Electric Transformer cooling system
US3028566A (en) * 1958-10-08 1962-04-03 Gen Electric Cooling system for electrical induction apparatus
DE1230902B (en) * 1962-05-16 1966-12-22 Liebknecht Transformat Layer winding for high voltage transformers
DE2826299C2 (en) * 1978-06-15 1982-04-08 Transformatoren Union Ag, 7000 Stuttgart Multi-phase transformer for power transmission in a supply network

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Publication number Publication date
JPS5871609A (en) 1983-04-28
DE3138909A1 (en) 1983-04-14
EP0075796A1 (en) 1983-04-06
ATE17172T1 (en) 1986-01-15
US4488134A (en) 1984-12-11
DE3268149D1 (en) 1986-02-06

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