EP0025951A1 - Single-phase transformer having windings encapsulated in resin - Google Patents

Single-phase transformer having windings encapsulated in resin Download PDF

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Publication number
EP0025951A1
EP0025951A1 EP80105468A EP80105468A EP0025951A1 EP 0025951 A1 EP0025951 A1 EP 0025951A1 EP 80105468 A EP80105468 A EP 80105468A EP 80105468 A EP80105468 A EP 80105468A EP 0025951 A1 EP0025951 A1 EP 0025951A1
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EP
European Patent Office
Prior art keywords
flanges
cast
winding cores
phase transformer
parallel
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Granted
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EP80105468A
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German (de)
French (fr)
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EP0025951B1 (en
Inventor
Gerhard Dipl.-Ing. Altmann
Richard Dr. Pfeiffer
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Transformatoren Union AG
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Transformatoren Union AG
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Priority to AT80105468T priority Critical patent/ATE5924T1/en
Publication of EP0025951A1 publication Critical patent/EP0025951A1/en
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Publication of EP0025951B1 publication Critical patent/EP0025951B1/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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating
    • 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
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • 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
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements

Definitions

  • the invention relates to a single-phase transformer with a winding core made of strip material and windings cast in cast resin, for example for installation on masts or directly in the ground in the course of underground cables.
  • This structure with a multi-legged core is very advantageous for a multi-phase transformer to be cast in synthetic resin, but it requires its use on single-phase transformers as a result of the mostly unwrapped yoke leg required there, a considerable effort in terms of the amount of material of the required casting resin, as soon as the core is to be hermetically sealed.
  • the invention is therefore based on the object of providing an arrangement of windings and cores for a single-phase transformer with a hermetically encapsulated active part which can be produced with normal manufacturing outlay without impairing operational safety and in which the amounts of material used are fully utilized according to their properties.
  • this object is achieved for a single-phase transformer with a winding core made of strip material in that when the windings are cast around parallel to the winding axis and parallel to a window with rectangular cross-section penetrated by the winding core, two flanges lying opposite one another are cast on, such that the inner sides of these flanges, which are also parallel to one another lie approximately in the plane of the narrow sides of the window, that in the inner sides of these flanges in the vicinity of the outer edge and parallel to this there are grooves for anchoring an encapsulation for the winding core and that the surface of the cast resin body has an earthed surface, at least on the surfaces directly opposite the winding core Metallization bears.
  • the space remaining after the introduction of the winding core between the flanges is cast with casting resin or that the flanges are rounded parallel to the contour of the winding core and the Space between the flanges is filled with tapes, preferably shrinkable, by wrapping the winding core, at least one layer of these tapes also covering the end faces of the flanges.
  • connection sockets for touch-proof, waterproof high-voltage cable plugs and bolts for the undervoltage connections which are also watertightly insulated in heat shrink tubing technology, are cast on the outside of the flanges or that support-like bushings for the top and bottom connections are used for use as a mast transformer on the outside of the flanges are. It is also expedient that the gaps between the metallized surface of the synthetic resin body and the winding core are filled with dried quartz sand.
  • the arrangement according to the invention is very advantageous for the construction of hermetically encapsulated single-phase transformers, because it enables the use of very low-loss winding cores and requires only relatively little synthetic resin for the encapsulation of the core and is therefore economically usable.
  • Windings 2 arranged around a vertical axis are encapsulated with synthetic resin and thereby completely encapsulated towards the outside.
  • This synthetic resin casting of the windings 2 is expanded on two opposite sides to axially parallel and also mutually parallel flanges 3.
  • the windings 2 consist of at least one, preferably internal, undervoltage winding and a radially further external high-voltage winding.
  • a central, shaft-like window parallel to the winding axis is recessed in the cast resin in the cast resin casting.
  • Two winding cores 1 made of strip material are arranged symmetrically to one another in this window.
  • Each of these winding cores 1 encloses the windings 2 on its own and lies between the flanges 3.
  • at least the surfaces of the synthetic resin encapsulation that lie directly between the windings 2 on the one hand and the winding cores 1 on the other are provided with a metallized surface 4 and are electrically conductive connected to an earth conductor.
  • this depression is also poured out all around with casting resin in a new casting process.
  • grooves 5 are provided on the inner side of the flanges 3 in the vicinity of the edges thereof.
  • the completely smooth-walled transformer is provided with corrosion protection and electrically effective shielding layers depending on the intended use.
  • the circumferential recess between the flanges 3 can also be filled by wrapping the winding cores 1 with a tape 6 made of shrinkable material, which, with a corresponding design of the inside of the flanges 3, likewise results in a hermetic encapsulation of the winding cores 1.
  • the corners of the flanges 3 are rounded off so that after wrapping the shrinkable tape 6 there is a step-free end jacket for the in turn cuboidal transformer.
  • the shrinkable band 6 it is expedient in many cases to enclose this arrangement with a bandage 7, the bandage 7 contributing above all to improving the corrosion protection.
  • Fig. 3 now shows a correspondingly supplemented cast resin transformer in a touch-proof, buried in the ground version.
  • connection sockets 8 are provided in a watertight design.
  • the low-voltage connection is made via bolts 9, the shrink tube technology being particularly suitable for insulation.
  • Fig. 4 shows a variation of the transformer according to the invention for installation on overhead line pylons, the electrical connection being made via support-like bushings 11.

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

Abstract

Single-phase transformer, including windings being wound around an axis and cast in resin forming a cast resin body, the cast resin winding body having an outer surface and a rectangular window formed therein with sides disposed in given planes, a wound core formed of tape material extended through the window, two flanges being cast with and integral with the cast resin winding body on opposite sides thereof and parallel to the winding axis and to the window, the flanges having outer edges, mutually parallel inner surfaces substantially disposed in the plane of the narrow sides of the window and grooves formed in the inner surfaces in the vicinity of and parallel to the outer edges, an encapsulation for the wound core being anchored in the grooves, and a grounded metallization layer formed on the outer surface of the cast resin winding body at least immediately adjacent to the wound core.

Description

Die Erfindung betrifft einen Einphasen-Transformator mit Wickelkern aus Bandwerkstoff und in Gießharz vergossenen Wicklungen, beispielsweise zur Installation auf Masten oder unmittelbar im Erdreich im Zuge von Erdkabeln.The invention relates to a single-phase transformer with a winding core made of strip material and windings cast in cast resin, for example for installation on masts or directly in the ground in the course of underground cables.

Derartige mit in Gießharz vergossenen Wicklungen ausgerüstete Transformatoren werden in neuerer Zeit, insbesondere wegen ihrer sehr guten Betriebssicherheit in wachsendem Maße als Verteilungstransformatoren eingesetzt. In der deutschen Patentanmeldung P 28 26 299.9 wird ein Mehrphasen-Transformator vorgeschlagen, dessen Wicklungen und dreischenkeliger Schichtkern durch Umgießen mit Kunstharz hermetisch abgeschlossen sind und der durch entsprechende Ausrüstung mit Anschlußbuchsen vergrabbar und an Erdkabel anschließbar ist.Such transformers equipped with cast resin encapsulated castings have recently been used increasingly as distribution transformers, in particular because of their very good operational reliability. In German patent application P 28 26 299.9, a multi-phase transformer is proposed, the windings and three-legged layer core of which are hermetically sealed by encapsulation with synthetic resin and which can be buried by appropriate equipment with connecting sockets and connected to underground cables.

Dieser Aufbau mit Mehrschenkelkern ist zwar für einen in Kunstharz einzugießenden Mehrphasen-Transformator sehr vorteilhaft, erfordert jedoch bei seiner Anwendung auf Einphasen-Transformatoren infolge des dort erforderlichen, meist unbewickelten Rückschlußschenkels einen erheblichen Aufwand bezüglich der Werkstoffmenge des erforderlichen Gießharzes, sobald der Kern hermetisch abgeschlossen werden soll.This structure with a multi-legged core is very advantageous for a multi-phase transformer to be cast in synthetic resin, but it requires its use on single-phase transformers as a result of the mostly unwrapped yoke leg required there, a considerable effort in terms of the amount of material of the required casting resin, as soon as the core is to be hermetically sealed.

Der Erfindung liegt daher die Aufgabe zugrunde, für einen Einphasen-Transformator mit hermetisch abgekapseltem Aktivteil eine Anordnung von Wicklungen und Kernen zu schaffen, die ohne Beeinträchtigung der Betriebssicherheit mit normalem Fertigungsaufwand herstellbar ist und in der die eingesetzten Werkstoffmengen entsprechend ihren Eigenschaften voll ausgenutzt werden.The invention is therefore based on the object of providing an arrangement of windings and cores for a single-phase transformer with a hermetically encapsulated active part which can be produced with normal manufacturing outlay without impairing operational safety and in which the amounts of material used are fully utilized according to their properties.

Erfindungsgemäß wird diese Aufgabe für einen Einphasen-Transformator mit Wickelkern aus Bandwerkstoff dadurch gelöst, daß beim Umgießen der Wicklungen parallel zur Wickelachse und parallel zu einem vom Wickelkern durchsetzten Fenster mit rechteckigem Querschnitt zwei sich gegenüberliegende Flansche angegossen sind, daß die Innenseiten dieser auch zueinander parallelen Flansche etwa in der Ebene der Schmalseiten des Fensters liegen, daß in den Innenseiten dieser Flansche in der Nähe des äußeren Randes und parallel hierzu Nuten zur Verankerung einer Kapselung für den Wickelkern liegen und daß die Oberfläche des Gießharzkörpers mindestens an den dem Wickelkern unmittelbar gegenüberliegenden Flächen eine geerdete Metallisierung trägt.According to the invention, this object is achieved for a single-phase transformer with a winding core made of strip material in that when the windings are cast around parallel to the winding axis and parallel to a window with rectangular cross-section penetrated by the winding core, two flanges lying opposite one another are cast on, such that the inner sides of these flanges, which are also parallel to one another lie approximately in the plane of the narrow sides of the window, that in the inner sides of these flanges in the vicinity of the outer edge and parallel to this there are grooves for anchoring an encapsulation for the winding core and that the surface of the cast resin body has an earthed surface, at least on the surfaces directly opposite the winding core Metallization bears.

Nach vorteilhaften Weiterbildungen der Erfindung ist vorgesehen, daß der nach dem Einbringen des Wickelkernes zwischen den Flanschen verbleibende Raum mit Gießharz vergossen ist oder daß die Flansche parallel zur Kontur des Wickelkernes abgerundet sind und der Raum zwischen den Flanschen durch Umwickeln des Wickelkernes mit, vorzugsweise schrumpffähigen, Bändern ausgefüllt ist, wobei wenigstens eine Lage dieser Bänder auch die Stirnseiten der Flansche überdeckt.According to advantageous developments of the invention it is provided that the space remaining after the introduction of the winding core between the flanges is cast with casting resin or that the flanges are rounded parallel to the contour of the winding core and the Space between the flanges is filled with tapes, preferably shrinkable, by wrapping the winding core, at least one layer of these tapes also covering the end faces of the flanges.

Nach zweckmäßigen Ausgestaltungen ist vorgesehen, daß auf den Außenseiten der Flansche Anschlußbuchsen für berührungssichere wasserdichte Oberspannungskabelstecker und Bolzen für die in Schrumpfschlauchtechnik ebenfalls wasserdicht isolierten Unterspannungsanschlüsse angegossen sind oder daß zur Verwendung als Masttransformator auf den Außenseiten der Flansche stützerähnliche Durchführungen für die ober- und unterspannungsseitigen Netzanschlüsse angegossen sind. Dabei ist es weiterhin zweckmäßig, daß die Spalte zwischen der metallisierten Oberfläche des Kunstharzkörpers und dem Wickelkern mit getrocknetem Quarzsand gefüllt sind.According to expedient refinements, it is provided that connection sockets for touch-proof, waterproof high-voltage cable plugs and bolts for the undervoltage connections, which are also watertightly insulated in heat shrink tubing technology, are cast on the outside of the flanges or that support-like bushings for the top and bottom connections are used for use as a mast transformer on the outside of the flanges are. It is also expedient that the gaps between the metallized surface of the synthetic resin body and the winding core are filled with dried quartz sand.

Die erfindungsgemäße Anordnung ist für den Aufbau von hermetisch zu kapselnden Einphasen-Transformatoren sehr vorteilhaft, denn sie ermöglicht die Verwendung von sehr verlustarmen Wickelbandkernen und fordert nur verhältnismäßig wenig Kunstharz für den Umguß des Kernes und ist daher wirtschaftlich einsetzbar.The arrangement according to the invention is very advantageous for the construction of hermetically encapsulated single-phase transformers, because it enables the use of very low-loss winding cores and requires only relatively little synthetic resin for the encapsulation of the core and is therefore economically usable.

Der prinzipielle Aufbau des erfindungsgemäßen Transformators und zwei Ausführungsbeispiele werden anhand einer Zeichnung näher erläutert.

  • Fig. 1 zeigt in perspektivischer Darstellung teilweise aufgeschnitten eine Anordnung mit vollkommen umgossenem Bandwickelkern,
  • Fig. 2 zeigt eine Anordnung mit zum Abschluß des Aktivteiles verwendeten Bändern aus schrumpffähigem Werkstoff,
  • Fig. 3 zeigt eine zum Vergraben vorgesehene Ausführungsform und
  • Fig. 4 eine zur Montage auf Freileitungsmasten vorgesehene Ausführungsform der erfindungsgemäßen Einphasen-Transformatoren.
The basic structure of the transformer according to the invention and two exemplary embodiments are explained in more detail with reference to a drawing.
  • 1 shows a perspective view, partially cut away, of an arrangement with a completely cast tape winding core,
  • 2 shows an arrangement with tapes made of shrinkable material used to terminate the active part,
  • 3 shows an embodiment provided for burying and
  • Fig. 4 shows an embodiment of the single-phase transformers according to the invention intended for mounting on overhead line pylons.

Um eine senkrechte Achse angeordnete Wicklungen 2 sind mit Kunstharz umgossen und dadurch nach außen hin vollständig gekapselt. Dieser Kunstharzguß der Wicklungen 2 ist auf zwei sich gegenüberliegenden Seiten zu achsparallel und auch untereinander parallelen Flanschen 3 erweitert. Die Wicklungen 2 bestehen mindestens aus einer, vorzugsweise innenliegenden, Unterspannungswicklung und einer radial weiter außenliegenden Oberspannungswicklung.Windings 2 arranged around a vertical axis are encapsulated with synthetic resin and thereby completely encapsulated towards the outside. This synthetic resin casting of the windings 2 is expanded on two opposite sides to axially parallel and also mutually parallel flanges 3. The windings 2 consist of at least one, preferably internal, undervoltage winding and a radially further external high-voltage winding.

Innerhalb der Wicklungen 2 ist in dem Gießharzumguß ein zur Wickelachse paralleles, zentrisches, schacht- ähnliches Fenster in dem Kunstharzumguß ausgespart. In dieses Fenster sind zwei symmetrisch zueinander angeordnete Wickelkerne 1 aus Bandwerkstoff eingeschichtet. Jeder dieser Wickelkerne 1 umschließt für sich allein die Wicklungen 2 und liegt dabei zwischen den Flanschen 3. Zur Verbesserung der Spannungsfestigkeit sind mindestens die unmittelbar zwischen den Wicklungen 2 einerseits und den Wickelkernen 1 andererseits liegenden Oberflächen des Kunstharzumgusses mit einer metallisierten Oberfläche 4 versehen und elektrisch leitend mit einem Erdungsleiter verbunden.Within the windings 2, a central, shaft-like window parallel to the winding axis is recessed in the cast resin in the cast resin casting. Two winding cores 1 made of strip material are arranged symmetrically to one another in this window. Each of these winding cores 1 encloses the windings 2 on its own and lies between the flanges 3. To improve the dielectric strength, at least the surfaces of the synthetic resin encapsulation that lie directly between the windings 2 on the one hand and the winding cores 1 on the other are provided with a metallized surface 4 and are electrically conductive connected to an earth conductor.

Die Wicklungen 2 bilden zusammen mit ihrem Kunstharzumguß und den hierin eingeschachtelten Wickelkernen 1 annähernd einen Quader mit einer zwischen den Flanschrändern umlaufenden Vertiefung. Um auch die Wickelkerne 1 nach außen hin abzuschließen und dadurch vor Korrosion und vor mechanischer Beschädigung zu schützen, wird in einem erneuten Gießvorgang diese Vertiefung rundum ebenfalls mit Gießharz ausgegossen. Zur Verankerung dieser Gießharzschicht sind auf der Inennseite der Flansche 3 in der Nähe von deren Rändern Nuten 5 vorgesehen. Der nach außen hin nunmehr vollständig glattwandige Transformator wird je nach Verwendungszweck mit Korrosionsschutz und elektrisch wirksamen Abschirmschichten versehen.The windings 2, together with their synthetic resin encapsulation and the winding cores 1 nested therein, form approximately a cuboid with a recess running between the flange edges. In order to also seal the winding cores 1 from the outside and thereby protect them against corrosion and mechanical damage, this depression is also poured out all around with casting resin in a new casting process. To anchor this cast resin layer, grooves 5 are provided on the inner side of the flanges 3 in the vicinity of the edges thereof. The completely smooth-walled transformer is provided with corrosion protection and electrically effective shielding layers depending on the intended use.

Anstelle eines Gießharzumgusses um die Wickelkerne 1 kann die umlaufende Vertiefung zwischen den Flanschen 3 auch durch Umwickeln der Wickelkerne 1 mit einem Band 6 aus schrumpffähigem Werkstoff ausgefüllt werden, wodurch bei entsprechender Gestaltung der Innenseiten der Flansche 3 ebenfalls eine hermetische Kapselung der Wickelkerne 1 bewirkt ist. Bei dieser Ausführungsform werden insbesondere die Ecken der Flansche 3 so abgerundet, daß sich nach dem Einwickeln des schrumpffähigen Bandes 6 ein absatzfreier Abschlußmantel für den wiederum quaderförmigen Transformator ergibt. Zusätzlich zu dem schrumpffähigen Band 6 ist es in vielen Fällen zweckmäßig, diese Anordnung durch eine Bandage 7 zu umschließen, wobei die Bandage 7 vor allem zur Verbesserung des Korrosionsschutzes beiträgt.Instead of a cast resin encapsulation around the winding cores 1, the circumferential recess between the flanges 3 can also be filled by wrapping the winding cores 1 with a tape 6 made of shrinkable material, which, with a corresponding design of the inside of the flanges 3, likewise results in a hermetic encapsulation of the winding cores 1. In this embodiment, in particular the corners of the flanges 3 are rounded off so that after wrapping the shrinkable tape 6 there is a step-free end jacket for the in turn cuboidal transformer. In addition to the shrinkable band 6, it is expedient in many cases to enclose this arrangement with a bandage 7, the bandage 7 contributing above all to improving the corrosion protection.

In Fig. 1 und 2 wurden der Übersichtlichkeit halber zjm Anschluß der Transformatoren an ein Netz erforderliche Hilfsmittel nicht dargestellt.1 and 2, for the sake of clarity, the aids required for connecting the transformers to a network have not been shown.

Fig. 3 zeigt nun einen entsprechend ergänzten Gießharz-Transformator in einer berührungssicheren, in den Erdboden eingrabbaren Ausführung. Zum oberspannungsseitigen Anschluß dieses Transformators sind Anschlußbuchsen 8 in wasserdichter Ausführung vorgesehen. Der unterspannungsseitige Anschluß erfolgt über Bolzen 9, wobei zur Isolierung insbesondere die Schrumpfschlauchtechnik geeignet ist.Fig. 3 now shows a correspondingly supplemented cast resin transformer in a touch-proof, buried in the ground version. For the high-voltage side connection of this transformer, connection sockets 8 are provided in a watertight design. The low-voltage connection is made via bolts 9, the shrink tube technology being particularly suitable for insulation.

Fig. 4 zeigt eine Variation des erfindungsgemäßen Transformators zur Aufstellung auf Freileitungsmasten, wobei der elektrische Anschluß über stützerähnliche Durchführungen 11 erfolgt.Fig. 4 shows a variation of the transformer according to the invention for installation on overhead line pylons, the electrical connection being made via support-like bushings 11.

Claims (6)

1. Einphasen-Transformator mit Wickelkern aus Bandwerkstoff und in Gießharz vergossenen Wicklungen, dadurch gekennzeichnet, - daß beim Umgießen der Wicklungen (2) parallel zur Wickelachse und parallel zu einem von Wickelkernen (1) durchsetzten Fenster mit rechteckigem Querschnitt zwei sich gegenüberliegende Flansche (3) angegossen sind, - daß die Innenseiten dieser auch zueinander parallelen Flansche (3) etwa in der Ebene der Schmalseiten des Fensters liegen, - daß in den Innenseiten dieser Flansche (3) in der Nähe des äußeren Randes und parallel hierzu Nuten (5) zur Verankerung einer Kapselung für die Wickelkerne (1) liegen und - daß die Oberfläche des Gießharzkörpers mindestens an den den Wickelkernen (1) unmittelbar gegenüberliegenden Flächen eine geerdete Metallisierung (4) trägt. 1. Single-phase transformer with winding core made of strip material and windings cast in cast resin, characterized in that - that when the windings (2) are cast around, parallel to the winding axis and parallel to a window with rectangular cross-section penetrated by winding cores (1), two flanges (3) lying opposite one another are cast on, - That the inner sides of these flanges (3), which are also parallel to one another, lie approximately in the plane of the narrow sides of the window, - That in the inside of these flanges (3) in the vicinity of the outer edge and parallel to this grooves (5) for anchoring an encapsulation for the winding cores (1) and - That the surface of the cast resin body carries an earthed metallization (4) at least on the surfaces directly opposite the winding cores (1). 2. Einphasen-Transformator nach Anspruch 1, dadurch gekennzeichnet , daß der nach dem Einbringen der Wickelkerne (1) zwischen den Flanschen (3) verbleibende Raum mit Gießharz vergossen ist, so daß die Wickelkerne (1) hermetisch abgeschlossen sind (Fig. 1).2. Single-phase transformer according to claim 1, characterized in that the space remaining after the introduction of the winding cores (1) between the flanges (3) is cast with casting resin, so that the winding cores (1) are hermetically sealed (Fig. 1) . 3. Einphasen-Transformator nach Anspruch 1, dadurch gekennzeichnet , daß die Flansche (3) parallel zur Kontur der Wickelkerne (1) abgerundet sind und der Raum zwischen den Flanschen (3) durch Umwickeln der Wickelkerne (1), mit vorzugsweise schrumpffähigen Bändern (6), ausgefüllt ist und daß wenigstens eine Lage (7) dieser Bänder (6) auch die Stirnseiten der Flansche (3) bedeckt und die Wickelkerne (1) vor Korrosion schützt (Fig. 2).3. Single-phase transformer according to claim 1, characterized in that the flanges (3) parallel to the contour of the winding cores (1) are rounded and the space between the flanges (3) is filled by wrapping the winding cores (1), preferably with shrinkable tapes (6), and that at least one layer (7) of these tapes (6) also covers the end faces of the flanges (3) covered and protects the winding cores (1) from corrosion (Fig. 2). 4. Einphasen-Transformator nach Anspruch 2 oder 3, dadurch gekennzeichnet , daß auf den Außenseiten der Flansche (3) Anschlußbuchsen (8) für berührungssichere, wasserdichte Oberspannungskabelstecker und Bolzen (9) für in Schrumpfschlauchtechnik ebenfalls wasserdicht isolierte Unterspannungsanschlüsse angegossen sind (Fig. 3).4. Single-phase transformer according to claim 2 or 3, characterized in that on the outer sides of the flanges (3) connection sockets (8) for touch-proof, waterproof high-voltage cable connectors and bolts (9) for under-voltage connections which are also watertightly insulated in heat-shrink tubing technology (FIG. 3 ). 5. Einphasen-Transformator nach Anspruch 2 oder 3, dadurch gekennzeichnet , daß zur Verwendung als Masttransformator auf den Außenseiten der Flansche (3) stützerähnliche Durchführungen (11) für die ober- und unterspannungsseitigen Netzanschlüsse angegossen sind (Fig. 4).5. Single-phase transformer according to claim 2 or 3, characterized in that for use as a mast transformer on the outside of the flanges (3) support-like bushings (11) for the upper and lower voltage side power connections are molded (Fig. 4). 6. Einphasen-Transformator nach Anspruch 2 oder 3, dadurch gekennzeichnet , daß die Spalte zwischen der metallisierten Oberfläche (4) des die Wicklungen (2) umschließenden Kunstharzkörpers und den Wickelkernen (1) mit getrocknetem Quarzsand gefüllt sind.6. Single-phase transformer according to claim 2 or 3, characterized in that the gaps between the metallized surface (4) of the windings (2) enclosing synthetic resin body and the winding cores (1) are filled with dried quartz sand.
EP80105468A 1979-09-25 1980-09-12 Single-phase transformer having windings encapsulated in resin Expired EP0025951B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80105468T ATE5924T1 (en) 1979-09-25 1980-09-12 SINGLE-PHASE TRANSFORMER WITH WINDINGS CAST IN RESIN.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2938792A DE2938792C2 (en) 1979-09-25 1979-09-25 Single-phase transformer with cast resin cast windings
DE2938792 1979-09-25

Publications (2)

Publication Number Publication Date
EP0025951A1 true EP0025951A1 (en) 1981-04-01
EP0025951B1 EP0025951B1 (en) 1984-01-18

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EP80105468A Expired EP0025951B1 (en) 1979-09-25 1980-09-12 Single-phase transformer having windings encapsulated in resin

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US (1) US4349801A (en)
EP (1) EP0025951B1 (en)
JP (1) JPS5655021A (en)
AT (1) ATE5924T1 (en)
BR (1) BR8006044A (en)
DE (1) DE2938792C2 (en)

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DE966274C (en) * 1950-12-02 1957-07-18 Siemens Ag Method for soaking and embedding coils or the like.
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Also Published As

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EP0025951B1 (en) 1984-01-18
JPS5655021A (en) 1981-05-15
ATE5924T1 (en) 1984-02-15
DE2938792A1 (en) 1981-03-26
US4349801A (en) 1982-09-14
DE2938792C2 (en) 1983-04-14
BR8006044A (en) 1981-04-07

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