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EP1519391B1 - Resin encapsulated transformer - Google Patents

Resin encapsulated transformer Download PDF

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Publication number
EP1519391B1
EP1519391B1 EP04090341.1A EP04090341A EP1519391B1 EP 1519391 B1 EP1519391 B1 EP 1519391B1 EP 04090341 A EP04090341 A EP 04090341A EP 1519391 B1 EP1519391 B1 EP 1519391B1
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EP
European Patent Office
Prior art keywords
winding
windings
taps
regions
voltage
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 - Lifetime
Application number
EP04090341.1A
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German (de)
French (fr)
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EP1519391A2 (en
EP1519391A3 (en
Inventor
Rudolf Hanov
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Siemens AG
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Siemens AG
Siemens Corp
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Publication date
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Publication of EP1519391A2 publication Critical patent/EP1519391A2/en
Publication of EP1519391A3 publication Critical patent/EP1519391A3/en
Application granted granted Critical
Publication of EP1519391B1 publication Critical patent/EP1519391B1/en
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Expired - Lifetime legal-status Critical Current

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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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • 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

Definitions

  • the invention relates to a casting resin transformer according to the preamble of claim 1.
  • the DE 26 34 21 discloses a winding for controllable transformers, one part of which is permanently switched on and the other part of which is provided with switching stages which are arranged symmetrically to one another. According to the local invention, the switching stages of the high-voltage winding are arranged with respect to the center plane, that the winding parts selected by means of the tap changer are arranged symmetrically to each other and thus canceling with respect to the force effect.
  • Another cast resin transformer is from the US 4,533,892 A known.
  • an axial cooling channel is formed between the areas not provided with tappings and the areas provided with taps of the two winding parts. This leads to an improved cooling effect of the transformer.
  • the partial windings forming the taps of the two winding parts are advantageously electrically connected to each other at their respective two ends.
  • a particularly simple structure is obtained if, on the one hand, the mutually facing ends and, on the other hand, the mutually remote ends of the part-windings of the two winding parts provided with the taps in the axial direction are each at the same potential. This is achieved by non-disabling bow-shaped conductors.
  • Fig. 1 shows the extending in the axial direction right outer edge 1 of a core of a provided, for example, with three core legs cast resin transformer.
  • the cores are each equipped with the same winding arrangement. Coaxially guided around the core are on the radially inner side of a low-voltage winding and on the radially outer side of a high-voltage winding.
  • the low voltage winding and the high voltage winding are arranged in the radial direction at a distance from each other and thus form an axial cooling channel. 2
  • the low-voltage winding consists of two axially extending, electrically connected in parallel winding parts, which are each formed of two successive in the axial direction part windings 3.1, 3.2 and 4.1, 4.2.
  • the partial winding 3.1 of the first winding part spatially within the part winding 4.1 of the second winding part and the part winding 3.2 of the first winding part are spatially arranged outside the part winding 4.2 of the second winding part.
  • the high-voltage winding also has two extending in the axial direction, electrically connected in parallel Winding on, each containing two in the axial direction part windings 5.1, 5.2 and 6.1, 6.2 included. Their spatial assignment is as in the low-voltage winding such that the two partial windings are 5.1 and 5.2 or 6.1 and 6.2 of a winding axially one behind the other and that the partial winding 5.1 of the first winding part concentric of the partial winding 6.1 of the second winding part and the partial winding 6.2 of the second winding part are surrounded concentrically by the partial winding 5.2 of the first winding part.
  • the winding parts of the high-voltage winding additionally each contain a third partial winding 5.3 or 6.3.
  • These partial windings 5.3 and 6.3 are on the one hand connected in series with the other part windings 5.1 and 5.2 or 6.1 and 6.2 of their winding part, on the other hand but connected directly at their respective two ends by conductors 7 and 8, so that they are connected directly parallel to each other.
  • the terminals 9 and 10 of the high-voltage winding are connected on the one hand to a conductor 11 connecting the upper ends of the partial windings 5.1 and 6.1 and on the other hand to the conductor 8.
  • the partial windings 5.3 and 6.3 are each, as Fig. 1 shows, from a plurality of, in the example shown, ten, connected in series coils 12.
  • Each coil 12 is according to Fig. 2 provided with a tap 13; However, the coils 12 may each have a plurality of taps 13.
  • the taps 13 are opposite to in Fig. 1 shown leads to the sub-windings 5.3 and 6.3 offset in the circumferential direction by 180 ° and therefore in Fig. 1 not shown.
  • the partial windings 5.3 and 6.3 are identical to one another, so that each coil 12 or tap 13 of the partial winding 5.3 corresponds to a coil 12 or tapping 13 of the partial winding 6.3, which is at the same potential.
  • the taps 13 are connected to terminals of a switching strip 14. These contains internal connection lines 15 such that the two taps 13 lying at the same potential of the partial windings 5.3 and 6.3 are connected to each other. Each with two lying at the same potential taps 13 connecting line 15 is guided to an external terminal of the switching strip 14, which in turn is connected to a terminal of a tap changer 16 in connection.
  • the sub-windings 5.3 and 6.3 are also arranged concentrically to the core and the partial windings 6.1 and 5.2, wherein they are in the axial direction one behind the other.
  • the two conductors 7 and 8 respectively connect the opposite and opposite ends of the partial windings 5.3 and 6.3 via terminal supports 17, 18, 19 and 20.
  • An auxiliary support 21 serves to fix a conductor 22 between the terminal 9 and the conductor 11.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Ac-Ac Conversion (AREA)

Description

Die Erfindung bezieht sich auf einen Gießharz-Transformator nach dem Oberbegriff des Anspruchs 1.The invention relates to a casting resin transformer according to the preamble of claim 1.

Die DE 26 34 21 offenbart eine Wicklung für regelbare Transformatoren, deren einer Teil dauernd eingeschaltet ist und deren anderer Teil mit Schaltstufen versehen ist, die symmetrisch zueinander angeordnet sind. Gemäß der dortigen Erfindung sind die Schaltstufen der Oberspannungswicklung so bezüglich der Mittelebene angeordnet, dass die mittels des Stufenschalters ausgewählten Wicklungsteile symmetrisch zueinander und sich somit bezüglich der Kraftwirkung aufhebend angeordnet sind.The DE 26 34 21 discloses a winding for controllable transformers, one part of which is permanently switched on and the other part of which is provided with switching stages which are arranged symmetrically to one another. According to the local invention, the switching stages of the high-voltage winding are arranged with respect to the center plane, that the winding parts selected by means of the tap changer are arranged symmetrically to each other and thus canceling with respect to the force effect.

Aus der DE 198 09 572 C2 ist ein Gießharz-Transformator mit einer Unterspannungswicklung und mit einer diese koaxial umgebenden Oberspannungswicklung mit einem axialen Kühlkanal zwischen zwei Wicklungsteilen bekannt. Die beiden Wicklungsteile sind einander parallel geschaltet und bestehen jeweils aus zwei axialen Teilwicklungen, die jeweils mehrere Spulen enthalten. Jeder Wicklungsteil besteht aus einer radial inneren Teilwicklung und einer radial äußeren Teilwicklung, die axial hintereinander angeordnet und elektrisch in Reihe geschaltet sind. Da die genaue Einstellung der Oberspannung nur über Wicklungsanzapfungen an den radial äußeren Teilwicklungen erfolgen kann, findet diese Spannungseinstellung an den beiden Wicklungsteilen bei unterschiedlichen Spannungswerten statt. Daher muss sie für diese getrennt durchgeführt werden, so dass für jeden Wicklungsteil ein eigener Stufenschalter erforderlich ist.From the DE 198 09 572 C2 is a cast resin transformer with a low-voltage winding and a coaxially surrounding this high-voltage winding with an axial cooling channel between two winding parts known. The two winding parts are connected in parallel and each consist of two partial axial windings, each containing a plurality of coils. Each winding part consists of a radially inner part of the winding and a radially outer part of the winding, which are arranged axially behind one another and electrically connected in series. Since the exact adjustment of the upper voltage can only take place via winding taps on the radially outer part windings, this voltage setting takes place at the two winding parts at different voltage values. Therefore, it must be carried out separately for them, so that a separate tap changer is required for each winding part.

Ein weiterer Gießharztransformator ist aus der US 4,533,892 A bekannt.Another cast resin transformer is from the US 4,533,892 A known.

Es ist daher die Aufgabe der vorliegenden Erfindung, einen Gießharz-Transformator der eingangs genannten Art zu schaffen, bei dem der Aufwand für die Spannungseinstellung verringert werden kann, so dass eine kostengünstigere Herstellung möglich ist.It is therefore the object of the present invention to provide a cast-resin transformer of the type mentioned, in which the effort for the voltage setting can be reduced, so that a more cost-effective production is possible.

Diese Aufgabe wird erfindungsgemäß durch das Kennzeichen des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen des erfindungsgemäßen Transformators ergeben sich aus den Unteransprüchen.This object is achieved by the characterizing part of claim 1. Advantageous developments of the transformer according to the invention will become apparent from the dependent claims.

Dadurch, dass die Anordnung der nicht mit Anzapfungen versehene Teilwicklungen zusammen den ersten Endabgriff der Oberwicklung am axialen Ende der nicht mit Wicklungen versehenen Bereiche erlaubt, so dass beide Endabgriffe an leicht zugänglichen außenliegenden Flächen, nämlich Stirnseite und radialem Außenumfang der Oberwicklung, angeordnet werden können, bei Beibehaltung der durchgehenden Parallelschaltung zweier Wicklungsteile.Characterized in that the arrangement of the non-tapped part windings together allows the first end tapping of the top winding at the axial end of the non-winded areas, so that both end taps can be arranged on easily accessible outside surfaces, namely end face and radial outer circumference of the top winding, while maintaining the continuous parallel connection of two winding parts.

Zweckmäßig ist zwischen den nicht mit Anzapfungen versehenen Bereichen und den mit Anzapfungen versehenen Bereichen der beiden Wicklungsteile ein axialer Kühlkanal gebildet. Dies führt zu einer verbesserten Kühlwirkung des Transformators.Expediently, an axial cooling channel is formed between the areas not provided with tappings and the areas provided with taps of the two winding parts. This leads to an improved cooling effect of the transformer.

Um eine möglichst weitgehende Potentialgleichheit der einander zugeordneten Anzapfungen zu erhalten, sind vorteilhaft die die mit den Anzapfungen versehenen Bereiche der beiden Wicklungsteile bildenden Teilwicklungen an ihren jeweils beiden Enden elektrisch miteinander verbunden. Eine besonders einfache Struktur erhält man, wenn einerseits die einander zugewandten Enden und andererseits die einander abgewandten Enden der in axialer Richtung hintereinander angeordneten Teilwicklungen der mit den Anzapfungen versehenen Bereiche der beiden Wicklungsteile jeweils auf gleichem Potential liegen. Dies wird durch einander nicht behindernde bügelförmige Leiter erreicht.In order to obtain the greatest possible equality of potential of the taps associated with each other, the partial windings forming the taps of the two winding parts are advantageously electrically connected to each other at their respective two ends. A particularly simple structure is obtained if, on the one hand, the mutually facing ends and, on the other hand, the mutually remote ends of the part-windings of the two winding parts provided with the taps in the axial direction are each at the same potential. This is achieved by non-disabling bow-shaped conductors.

Die Erfindung wird im Folgenden anhand eines in den Figuren dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

Fig. 1
einen senkrechten Schnitt durch die auf einem Kern eines Transformators angeordneten Wicklungen auf der Anschlussseite, und
Fig. 2
das Schaltbild der Oberspannungswicklung der Wicklungsanordnung nach Fig. 1.
The invention will be explained in more detail below with reference to an embodiment shown in FIGS. Show it:
Fig. 1
a vertical section through the arranged on a core of a transformer windings on the connection side, and
Fig. 2
the circuit diagram of the high-voltage winding of the winding arrangement after Fig. 1 ,

Fig. 1 zeigt den in axialer Richtung verlaufenden rechten Außenrand 1 eines Kerns eines beispielsweise mit drei Kernschenkeln versehenen Gießharz-Transformators. Die Kerne sind jeweils mit dergleichen Wicklungsanordnung bestückt. Koaxial um den Kern herumgeführt sind auf der radial inneren Seite eine Unterspannungswicklung und auf der radial äußeren Seite eine Oberspannungswicklung. Die Unterspannungswicklung und die Oberspannungswicklung sind in radialer Richtung im Abstand voneinander angeordnet und bilden somit einen axialen Kühlkanal 2. Fig. 1 shows the extending in the axial direction right outer edge 1 of a core of a provided, for example, with three core legs cast resin transformer. The cores are each equipped with the same winding arrangement. Coaxially guided around the core are on the radially inner side of a low-voltage winding and on the radially outer side of a high-voltage winding. The low voltage winding and the high voltage winding are arranged in the radial direction at a distance from each other and thus form an axial cooling channel. 2

Die Unterspannungswicklung besteht aus zwei sich in axialer Richtung erstreckenden, elektrisch parallel geschalteten Wicklungsteilen, die jeweils aus zwei in axialer Richtung hintereinander liegenden Teilwicklungen 3.1, 3.2 bzw. 4.1, 4.2 gebildet sind. Dabei sind die Teilwicklung 3.1 des ersten Wicklungsteils räumlich innerhalb der Teilwicklung 4.1 des zweiten Wicklungsteils und die Teilwicklung 3.2 des ersten Wicklungsteils räumlich außerhalb der Teilwicklung 4.2 des zweiten Wicklungsteils angeordnet.The low-voltage winding consists of two axially extending, electrically connected in parallel winding parts, which are each formed of two successive in the axial direction part windings 3.1, 3.2 and 4.1, 4.2. The partial winding 3.1 of the first winding part spatially within the part winding 4.1 of the second winding part and the part winding 3.2 of the first winding part are spatially arranged outside the part winding 4.2 of the second winding part.

Die Oberspannungswicklung weist ebenfalls zwei sich in axialer Richtung erstreckende, elektrisch parallel geschaltete Wicklungsteile auf, die jeweils zwei in axialer Richtung hintereinander liegende Teilwicklungen 5.1, 5.2 bzw. 6.1, 6.2 enthalten. Deren räumliche Zuordnung ist wie bei der Unterspannungswicklung derart, dass die beiden Teilwicklungen 5.1 und 5.2 bzw. 6.1 und 6.2 eines Wicklungsteils axial hintereinander liegen und dass die Teilwicklung 5.1 des ersten Wicklungsteils konzentrisch von der Teilwicklung 6.1 des zweiten Wicklungsteils sowie die Teilwicklung 6.2 des zweiten Wicklungsteils konzentrisch von der Teilwicklung 5.2 des ersten Wicklungsteils umgeben sind.The high-voltage winding also has two extending in the axial direction, electrically connected in parallel Winding on, each containing two in the axial direction part windings 5.1, 5.2 and 6.1, 6.2 included. Their spatial assignment is as in the low-voltage winding such that the two partial windings are 5.1 and 5.2 or 6.1 and 6.2 of a winding axially one behind the other and that the partial winding 5.1 of the first winding part concentric of the partial winding 6.1 of the second winding part and the partial winding 6.2 of the second winding part are surrounded concentrically by the partial winding 5.2 of the first winding part.

Darüber hinaus enthalten die Wicklungsteile der Oberspannungswicklung zusätzlich jeweils eine dritte Teilwicklung 5.3 bzw. 6.3. Diese Teilwicklungen 5.3 und 6.3 sind einerseits mit den anderen Teilwicklungen 5.1 und 5.2 bzw. 6.1 und 6.2 ihres Wicklungsteils in Reihe geschaltet, andererseits aber an ihren jeweiligen beiden Enden durch Leiter 7 und 8 direkt miteinander verbunden, so dass sie unmittelbar zueinander parallel geschaltet sind. Die Anschlüsse 9 und 10 der Oberspannungswicklung sind einerseits mit einem die oberen Enden der Teilwicklungen 5.1 und 6.1 verbindenden Leiter 11 und andererseits mit dem Leiter 8 verbunden.In addition, the winding parts of the high-voltage winding additionally each contain a third partial winding 5.3 or 6.3. These partial windings 5.3 and 6.3 are on the one hand connected in series with the other part windings 5.1 and 5.2 or 6.1 and 6.2 of their winding part, on the other hand but connected directly at their respective two ends by conductors 7 and 8, so that they are connected directly parallel to each other. The terminals 9 and 10 of the high-voltage winding are connected on the one hand to a conductor 11 connecting the upper ends of the partial windings 5.1 and 6.1 and on the other hand to the conductor 8.

Die Teilwicklungen 5.3 und 6.3 bestehen jeweils, wie Fig. 1 zeigt, aus mehreren, im dargestellten Beispiel zehn, hintereinander geschalteten Spulen 12. Jede Spule 12 ist gemäß Fig. 2 mit einer Anzapfung 13 versehen; jedoch können die Spulen 12 jeweils auch mehrere Anzapfungen 13 aufweisen. Die Anzapfungen 13 sind gegenüber den in Fig. 1 gezeigten Zuleitungen zu den Teilwicklungen 5.3 und 6.3 in deren Umfangsrichtung um 180° versetzt und daher in Fig. 1 nicht dargestellt.The partial windings 5.3 and 6.3 are each, as Fig. 1 shows, from a plurality of, in the example shown, ten, connected in series coils 12. Each coil 12 is according to Fig. 2 provided with a tap 13; However, the coils 12 may each have a plurality of taps 13. The taps 13 are opposite to in Fig. 1 shown leads to the sub-windings 5.3 and 6.3 offset in the circumferential direction by 180 ° and therefore in Fig. 1 not shown.

Die Teilwicklungen 5.3 und 6.3 sind einander gleich ausgebildet, so dass jeder Spule 12 bzw. Anzapfung 13 der Teilwicklung 5.3 eine Spule 12 bzw. Anzapfung 13 der Teilwicklung 6.3 entspricht, die auf gleichem Potential liegt. Die Anzapfungen 13 sind mit Anschlüssen einer Schaltleiste 14 verbunden. Diese enthält interne Verbindungsleitungen 15 derart, dass die beiden jeweils auf gleichem Potential liegenden Anzapfungen 13 der Teilwicklungen 5.3 und 6.3 miteinander verbunden werden. Jede mit zwei auf gleichem Potential liegenden Anzapfungen 13 verbundene Verbindungsleitung 15 ist zu einem äußeren Anschluss der Schaltleiste 14 geführt, der wiederum mit einem Anschluss eines Stufenschalters 16 in Verbindung steht. Durch entsprechende Einstellung nur des einen Stufenschalters 16 wird somit bewirkt, dass in beiden Teilwicklungen 5.3 und 6.3 gleichzeitig einander entsprechende Spulen oder Spulenteile überbrückt werden, wodurch in den Teilwicklungen 5.3 und 6.3 jeweils der gleiche Teilwert der Oberspannung gebildet wird, um diese auf einen gewünschten Wert einzustellen.The partial windings 5.3 and 6.3 are identical to one another, so that each coil 12 or tap 13 of the partial winding 5.3 corresponds to a coil 12 or tapping 13 of the partial winding 6.3, which is at the same potential. The taps 13 are connected to terminals of a switching strip 14. These contains internal connection lines 15 such that the two taps 13 lying at the same potential of the partial windings 5.3 and 6.3 are connected to each other. Each with two lying at the same potential taps 13 connecting line 15 is guided to an external terminal of the switching strip 14, which in turn is connected to a terminal of a tap changer 16 in connection. By appropriate adjustment of only one tap changer 16 is thus effected that in both partial windings 5.3 and 6.3 simultaneously corresponding coils or coil parts are bridged, whereby in the partial windings 5.3 and 6.3 respectively the same partial value of the upper voltage is formed to these to a desired value adjust.

Wie in Fig. 1 illustriert ist, sind die Teilwicklungen 5.3 und 6.3 ebenfalls konzentrisch zum Kern und die Teilwicklungen 6.1 und 5.2 umgebend angeordnet, wobei sie in axialer Richtung hintereinander liegen. Die beiden Leiter 7 und 8 verbinden jeweils die einander abgewandten und die einander zugewandten Enden der Teilwicklungen 5.3 und 6.3 über Anschlussstützer 17, 18, 19 und 20. Ein Hilfsstützer 21 dient zum Fixieren eines Leiters 22 zwischen dem Anschluss 9 und dem Leiter 11.As in Fig. 1 is illustrated, the sub-windings 5.3 and 6.3 are also arranged concentrically to the core and the partial windings 6.1 and 5.2, wherein they are in the axial direction one behind the other. The two conductors 7 and 8 respectively connect the opposite and opposite ends of the partial windings 5.3 and 6.3 via terminal supports 17, 18, 19 and 20. An auxiliary support 21 serves to fix a conductor 22 between the terminal 9 and the conductor 11.

Zwischen den Teilwicklungen 6.1 und 5.2 einerseits und den Teilwicklungen 5.3 und 6.3 andererseits besteht ein radialer Abstand, um einen zweiten Kühlkanal 23 zu bilden.Between the partial windings 6.1 and 5.2 on the one hand and the partial windings 5.3 and 6.3 on the other hand, there is a radial distance to form a second cooling channel 23.

Claims (6)

  1. Resin-encapsulated transformer with at least one lower-voltage winding and with at least one upper-voltage winding, coaxially surrounding the lower-voltage winding and having two winding parts, which are connected parallel to one another and respectively have a number of taps for a desired setting of the higher voltage,
    - wherein each winding part has part-windings (5.1, 5.2, 5.3, or 6.1, 6.2, 6.3), the part-windings of each winding part (5.1, 5.2, 5.3, or 6.1, 6.2, 6.3) forming a series connection,
    - wherein the regions of the two winding parts that are provided with the taps (13) are each formed by a part-winding (5.3, 6.3) with in each case a number of coils (12) and these part-windings (5.3, 6.3) coaxially surround the regions of the two winding parts that are not provided with the taps (13) and are arranged one behind the other in the axial direction, characterized
    - in that the part-windings (5.3, 6.3), which form the regions of the two winding parts that are provided with the taps (13), are formed the same as one another, so that each coil (12) or tap (13) of the first of these part-windings (5.3) has a corresponding coil (12) or tap (13) of the second of these part-windings (6.3), which is at the same potential, the taps (13) of these two part-windings (5.3, 6.3) that are respectively at the same potential being connected to a common terminal of a stepping switch (16) that is adjustable for the voltage setting,
    - in that the regions of the two winding parts that are not provided with the taps (13) are respectively divided into at least two axial part-windings (5.1, 5.2; 6.1, 6.2), these axial part-windings (5.1, 5.2; 6.1, 6.2) being arranged alternately on the radially inner and radially outer side of the upper-voltage winding.
  2. Transformer according to Claim 1, characterized in that an axial cooling channel (23) is formed between the regions that are not provided with taps (13) and the regions that are provided with taps (13) of the two winding parts.
  3. Transformer according to either of Claims 1 and 2, characterized in that the part-windings (5.3, 6.3) forming the regions of the two winding parts that are provided with the taps (13) are connected electrically parallel at both of their ends respectively.
  4. Transformer according to Claim 3, characterized in that the ends facing one another of the part-windings (5.3, 6.3), arranged one behind the other in the axial direction, of the regions of the two winding parts that are provided with the taps (13) are at the same potential.
  5. Transformer according to Claim 3 or 4, characterized in that the ends facing away from one another of the part-windings (5.3, 6.3), arranged one behind the other in the axial direction, of the regions of the two winding parts that are provided with the taps (13) are at the same potential.
  6. Transformer according to one of the preceding claims, characterized in that a switching strip (14) is provided, for the respective connection of the taps (13) of the two winding parts that are at the same potential to one another and to an assigned terminal of the stepping switch (16).
EP04090341.1A 2003-09-25 2004-09-06 Resin encapsulated transformer Expired - Lifetime EP1519391B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003145659 DE10345659B4 (en) 2003-09-25 2003-09-25 Cast-resin transformer
DE10345659 2003-09-25

Publications (3)

Publication Number Publication Date
EP1519391A2 EP1519391A2 (en) 2005-03-30
EP1519391A3 EP1519391A3 (en) 2006-03-01
EP1519391B1 true EP1519391B1 (en) 2016-11-02

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EP04090341.1A Expired - Lifetime EP1519391B1 (en) 2003-09-25 2004-09-06 Resin encapsulated transformer

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EP (1) EP1519391B1 (en)
DE (1) DE10345659B4 (en)

Citations (1)

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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE263421C (en) * 1911-07-04 1913-09-05
DE3338149A1 (en) * 1983-10-20 1985-05-02 Transformatoren Union Ag, 7000 Stuttgart CIRCUIT ARRANGEMENT FOR LARGE POWER TRANSFORMERS
DE3936937A1 (en) * 1989-11-06 1991-05-08 Siemens Ag Winding set for moulded resin transformer - has main and auxiliary winding for each phase axially aligned along respective core limbs
DE19809572C2 (en) * 1998-03-05 2000-06-21 Siemens Ag Cast resin transformer

Patent Citations (1)

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

Also Published As

Publication number Publication date
DE10345659B4 (en) 2005-11-10
EP1519391A2 (en) 2005-03-30
DE10345659A1 (en) 2005-04-28
EP1519391A3 (en) 2006-03-01

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