EP0709864A2 - Transformer encapsulated in cast resin - Google Patents

Transformer encapsulated in cast resin Download PDF

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Publication number
EP0709864A2
EP0709864A2 EP95116433A EP95116433A EP0709864A2 EP 0709864 A2 EP0709864 A2 EP 0709864A2 EP 95116433 A EP95116433 A EP 95116433A EP 95116433 A EP95116433 A EP 95116433A EP 0709864 A2 EP0709864 A2 EP 0709864A2
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EP
European Patent Office
Prior art keywords
bore
connection
cast resin
wire
transformer according
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.)
Granted
Application number
EP95116433A
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German (de)
French (fr)
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EP0709864A3 (en
EP0709864B1 (en
Inventor
Rudolf Dedelmahr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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Publication of EP0709864A2 publication Critical patent/EP0709864A2/en
Publication of EP0709864A3 publication Critical patent/EP0709864A3/xx
Application granted granted Critical
Publication of EP0709864B1 publication Critical patent/EP0709864B1/en
Anticipated expiration legal-status Critical
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
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • 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
    • H01F27/28—Coils; Windings; Conductive connections

Definitions

  • the present invention relates to a cast resin transformer with at least one primary winding, at least one secondary winding and at least one with cast-in connection element, which is connected in an electrically conductive manner to the primary winding or the secondary winding via a connecting wire and to which, e.g. by means of a screw connection, a transformer-external connecting line can be connected, the connecting element having a hole for receiving the connecting wire and the connecting wire being inserted into the hole (DE-PS 29 04 746).
  • connection elements in which in a casting compound together with the winding cast connection elements are mechanically fixed and electrically conductive via conductor rod to the winding in that these conductor rods have deformations in the manner of a knurling.
  • the connecting wires are also connected to the conductor bars via solder joints.
  • Similar transformers are also manufactured and sold, for example, by Trafo-Union GmbH under the name GEAFOL cast resin transformers.
  • the object of the present invention is to establish a simple, reliable and inexpensive connection between the connecting wire and the connecting element.
  • connection technology used allows one reliable operation of the transformer. There is no aging damage like a solder joint.
  • the deformation is advantageously designed as a bulge.
  • the bulge can be caused by upsetting, which is easy to manufacture.
  • the bore can be designed as a blind bore or alternatively as a through bore.
  • the connecting element can advantageously have a threaded bore for receiving a screw for connecting the connecting line, the bore being arranged radially or axially to the threaded bore. This allows the cast resin transformer to be connected to the network in a convenient manner.
  • the threaded bore and / or the bore can advantageously be arranged eccentrically, so that a lateral connection is possible.
  • the connecting element is preferably made of brass, the connecting wire preferably consisting of copper. This ensures good contact.
  • a primary-side three-phase network with the phases R, S and T or a secondary-side three-phase network with the phases U, V and W can be connected to the connection elements 6 and 8 via transformer-external connecting lines 9, 10.
  • the entire transformer including transformer core 4, windings 1, 2, connecting elements 6, 8 and connecting wires 5, 7 is cast in casting resin 11. So only the connection elements 6, 8 are accessible from the outside.
  • the windings can also form individually cast structural units which are arranged on a common, non-cast core.
  • connection elements 6, 8 are designed as hexagon cast nuts.
  • the connection elements 6, 8 each have a threaded bore 12 into which a screw (not shown in FIG. 2) can be screwed.
  • a screw not shown in FIG. 2
  • the transformer-external connecting lines 9, 10 are connected to the transformer.
  • the connection elements 6, 8 also each have a bore 13, which in the cast-in state of the connection elements 6, 8 is directed inwards and serves to accommodate the connection wires 5, 7.
  • the connecting wire 5 inserted into the bore 13 has a bulge 14 in the area of the connecting element 6.
  • the bulge 14 can e.g. to be caused by upsetting. Due to the bulge 14, the connecting wire 5 is mechanically fixed and electrically conductively connected to the connecting element 6.
  • the connection is both gas and liquid tight. It can absorb tensile forces and acts as a protection against torsion.
  • the bulge 14 can be designed differently depending on the configuration of the bore 13. If the bore 13 is a simple bore, the bulge 14 is at the entrance to the bore 13 arranged. If the bore is half open or has a puncture, the bulge 14 can alternatively or additionally also be arranged in the semi-open region of the bore 13 or in the puncture region of the bore 13.
  • the bore 13 is arranged axially to the threaded bore 12, both the threaded bore 12 and the bore 13 being arranged outside the line of symmetry of the pouring nut 6, that is to say eccentrically. As a result, the pouring nut 6 can be kept compact.
  • the bore 13 is designed as a blind bore in the present case.
  • the bore 13 could also be designed as a through bore.
  • FIG. 3 shows a further embodiment of the connection between connecting wire 7 and connecting element 8.
  • the bore 13 is not arranged axially but radially to the threaded bore 12.
  • the bore 13 is also formed as a through bore.
  • it could also be designed as a blind bore.
  • the invention described above is particularly advantageous when the connecting element 6, 8 is made of brass and the connecting wire 5, 7 is made of copper. With this combination in particular, flux is required for soldering, which can only be removed again with great effort. However, other working methods such as welding or squeezing are not possible for other technical reasons.
  • the present invention therefore enables great cost savings, in particular in the combination "brass for casting nut and copper for connecting wire".
  • other material combinations for example in connection with aluminum, are also possible.
  • they are described above Features can be combined in any way within the scope of professional skill, without leaving the path of the present idea.

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

Abstract

The transformer has at least a primary winding (1), a secondary winding, and an integral connection element (6,8). The connection element is connected to the primary or secondary winding via a connection wire (5,7). The connector is also connected to an external wire (9,10) via a screw connection. The connection element (6,8) include a bore (13) for receiving the connection wire (5,7). The connection wire has a deformation (14) for mechanically and electrically fixing the wire to the connection element. The bore is eccentric, and the wire is made of brass and/or copper.

Description

Die vorliegende Erfindung betrifft einen Gießharztransformator mit mindestens einer Primärwicklung, mindestens einer Sekundärwicklung und mindestens einem mit eingegossenen Anschlußelement, das über einen Anschlußdraht mit der Primärwicklung oder der Sekundärwicklung elektrisch leitend verbunden ist und an das, z.B. mittels Schraubverbindung, eine transformatorexterne Anschlußleitung anschließbar ist, wobei das Anschlußelement eine Bohrung zur Aufnahme des Anschlußdrahtes aufweist und der Anschlußdraht in die Bohrung eingeführt ist (DE-PS 29 04 746).The present invention relates to a cast resin transformer with at least one primary winding, at least one secondary winding and at least one with cast-in connection element, which is connected in an electrically conductive manner to the primary winding or the secondary winding via a connecting wire and to which, e.g. by means of a screw connection, a transformer-external connecting line can be connected, the connecting element having a hole for receiving the connecting wire and the connecting wire being inserted into the hole (DE-PS 29 04 746).

Aus der US-PS 38 38 372 ist eine Magnetspuleneinheit bekannt, bei der in einer Vergußmasse mitsamt der Wicklung eingegossene Anschlußelemente mechanisch fest und elektrisch leitend über Leiterstabe mit der Wicklung dadurch verbunden sind, daß diese Leiterstäbe Verformungen in der Art einer Rändelung aufweisen. Die Anschlußdrähte sind zusätzlich über Lötstellen mit den Leiterstäben verbunden.From US-PS 38 38 372 a solenoid unit is known in which in a casting compound together with the winding cast connection elements are mechanically fixed and electrically conductive via conductor rod to the winding in that these conductor rods have deformations in the manner of a knurling. The connecting wires are also connected to the conductor bars via solder joints.

Ähnliche Transformatoren werden beispielsweise auch von der Trafo-Union GmbH unter der Bezeichnung GEAFOL-Gießharztransformatoren hergestellt und vertrieben.Similar transformers are also manufactured and sold, for example, by Trafo-Union GmbH under the name GEAFOL cast resin transformers.

Die Aufgabe der vorliegenden Erfindung besteht darin, eine einfache, zuverlässige und kostengünstige Verbindung zwischen dem Anschlußdraht und dem Anschlußelement herzustellen.The object of the present invention is to establish a simple, reliable and inexpensive connection between the connecting wire and the connecting element.

Diese Aufgabe wird bei einem Gießharztransformator der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß daß der Anschlußdraht im Bereich des Anschlußelements eine Verformung aufweist, derart, daß der Anschlußdraht mechanisch fest und elektrisch leitend mit dem Anschlußelement verbunden ist. Die verwendete Verbindungstechnik erlaubt einen zuverlässigen Betrieb des Transformators. Alterungsschäden wie bei einer Lötstelle treten dabei nicht auf.This object is achieved according to the invention in a cast resin transformer of the type mentioned at the outset in that the connecting wire has a deformation in the region of the connecting element in such a way that the connecting wire is connected to the connecting element in a mechanically fixed and electrically conductive manner. The connection technology used allows one reliable operation of the transformer. There is no aging damage like a solder joint.

Mit Vorteil ist die Verformung als Aufbauchung ausgebildet. Die Aufbauchung kann dabei durch Stauchen bewirkt sein, was der einfachen Herstellbarkeit entgegenkommt. Die Bohrung kann als Sackbohrung oder alternativ als Durchgangsbohrung ausgebildet sein.The deformation is advantageously designed as a bulge. The bulge can be caused by upsetting, which is easy to manufacture. The bore can be designed as a blind bore or alternatively as a through bore.

Das Anschlußelement kann vorteilhafterweise eine Gewindebohrung zur Aufnahme einer Schraube zum Anschließen der Anschlußleitung aufweisen wobei die Bohrung radial oder axial zur Gewindebohrung angeordnet ist. Damit kann der Gießharztransformator in zweckmäßiger Weise an das Netz angeschlossen werden.The connecting element can advantageously have a threaded bore for receiving a screw for connecting the connecting line, the bore being arranged radially or axially to the threaded bore. This allows the cast resin transformer to be connected to the network in a convenient manner.

Die Gewindebohrung und/oder die Bohrung können mit Vorteil exzentrisch angeordnet sein, so daß eine seitliche Verbindung möglich ist. Das Anschlußelement besteht bevorzugt aus Messing, wobei der Anschlußdraht bevorzugt aus Kupfer besteht. Somit ist eine gute Kontaktierung gegeben.The threaded bore and / or the bore can advantageously be arranged eccentrically, so that a lateral connection is possible. The connecting element is preferably made of brass, the connecting wire preferably consisting of copper. This ensures good contact.

Weitere Vorteile und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels und der Zeichnung. Dabei zeigen:

FIG 1
einen Schnitt durch einen erfindungsgemäßen Drehstrom-Gießharztransformator und
FIG 2 und 3
jeweils die Verbindung eines Anschlußelements mit einem Anschlußdraht.
Further advantages and details emerge from the following description of an exemplary embodiment and the drawing. Show:
FIG. 1
a section through an inventive three-phase cast resin transformer and
2 and 3
each the connection of a connecting element with a connecting wire.

FIG 1 zeigt einen Drehstromtransformator, der drei Primärwicklungen 1 und drei Sekundärwicklungen 2 aufweist, welche jeweils paarweise konzentrisch auf den drei Säulen 3 des Transformatorkerns 4 angeordnet sind. Die Primärwicklungen 1 sind über die Anschlußdrähte 5 mit den Anschlußelementen 6 verbunden. Die Sekundärwicklungen 2 sind über die Anschlußdrähte 7 mit den Anschlußelementen 8 verbunden. An die Anschlußelemente 6 bzw. 8 sind über transformatorexterne Anschlußleitungen 9, 10 ein primärseitiges Drehstromnetz mit den Phasen R, S und T bzw. ein sekundärseitiges Drehstromnetz mit den Phasen U, V und W anschließbar.1 shows a three-phase transformer which has three primary windings 1 and three secondary windings 2, which are each arranged in pairs concentrically on the three columns 3 of the transformer core 4. The primary windings 1 are connected to the connection elements 6 via the connection wires 5. The secondary windings 2 are over the connecting wires 7 connected to the connecting elements 8. A primary-side three-phase network with the phases R, S and T or a secondary-side three-phase network with the phases U, V and W can be connected to the connection elements 6 and 8 via transformer-external connecting lines 9, 10.

Wie aus FIG 1 ersichtlich ist, ist der gesamte Transformator einschließlich Transformatorkern 4, Wicklungen 1, 2, Anschlußelementen 6, 8 und Anschlußdrähten 5, 7 in Gießharz 11 eingegossen. Von außen sind also nur die Anschlußelemente 6, 8 zugänglich. Die Wicklungen können alternativ auch jeweils für sich vergossene Baueinheiten bilden, die auf einem gemeinsamen, nicht vergossenen Kern angeordnet sind.As can be seen from FIG. 1, the entire transformer including transformer core 4, windings 1, 2, connecting elements 6, 8 and connecting wires 5, 7 is cast in casting resin 11. So only the connection elements 6, 8 are accessible from the outside. As an alternative, the windings can also form individually cast structural units which are arranged on a common, non-cast core.

Gemäß FIG 2 sind die Anschlußelemente 6, 8 als Sechskant-Eingießmuttern ausgebildet. Die Anschlußelemente 6, 8 weisen jeweils eine Gewindebohrung 12 auf, in welche eine in FIG 2 nicht näher dargestellte Schraube eindrehbar ist. Mittels einer derartigen Schraubverbindung werden die transformatorexternen Anschlußleitungen 9, 10 an den Transformator angeschlossen. Die Anschlußelemente 6, 8 weisen ferner jeweils eine Bohrung 13 auf, welche im eingegossenen Zustand der Anschlußelemente 6, 8 nach innen gerichtet ist und der Aufnahme der Anschlußdrähte 5, 7 dient.According to FIG 2, the connection elements 6, 8 are designed as hexagon cast nuts. The connection elements 6, 8 each have a threaded bore 12 into which a screw (not shown in FIG. 2) can be screwed. By means of such a screw connection, the transformer-external connecting lines 9, 10 are connected to the transformer. The connection elements 6, 8 also each have a bore 13, which in the cast-in state of the connection elements 6, 8 is directed inwards and serves to accommodate the connection wires 5, 7.

Wie aus FIG 2 ersichtlich ist, weist der in die Bohrung 13 eingeführte Anschlußdraht 5 im Bereich des Anschlußelements 6 eine Aufbauchung 14 auf. Die Aufbauchung 14 kann z.B. durch Stauchen bewirkt sein. Durch die Aufbauchung 14 ist der Anschlußdraht 5 mechanisch fest und elektrisch leitend mit den Anschlußelement 6 verbunden. Die Verbindung ist sowohl gas- als auch flüssigkeitsdicht. Sie kann Zugkräfte aufnehmen und wirkt als Verdrehungsschutz.As can be seen from FIG. 2, the connecting wire 5 inserted into the bore 13 has a bulge 14 in the area of the connecting element 6. The bulge 14 can e.g. to be caused by upsetting. Due to the bulge 14, the connecting wire 5 is mechanically fixed and electrically conductively connected to the connecting element 6. The connection is both gas and liquid tight. It can absorb tensile forces and acts as a protection against torsion.

Die Aufbauchung 14 kann je nach Ausgestaltung der Bohrung 13 verschieden ausgestaltet sein. Wenn die Bohrung 13 eine einfache Bohrung ist, ist die Aufbauchung 14 am Eingang der Bohrung 13 angeordnet. Wenn die Bohrung halb offen ist oder einen Einstich aufweist, kann die Aufbauchung 14 alternativ oder zusätzlich auch im halb offenen Bereich der Bohrung 13 bzw. im Einstichsbereich der Bohrung 13 angeordnet sein.The bulge 14 can be designed differently depending on the configuration of the bore 13. If the bore 13 is a simple bore, the bulge 14 is at the entrance to the bore 13 arranged. If the bore is half open or has a puncture, the bulge 14 can alternatively or additionally also be arranged in the semi-open region of the bore 13 or in the puncture region of the bore 13.

Wie aus FIG 2 ersichtlich ist, ist die Bohrung 13 axial zur Gewindebohrung 12 angeordnet, wobei sowohl die Gewindebohrung 12 als auch die Bohrung 13 außerhalb der Symmetrielinie der Eingießmutter 6, also exzentrisch, angeordnet sind. Dadurch kann die Eingießmutter 6 kompakt gehalten werden. Wie ferner aus FIG 2 ersichtlich ist, ist die Bohrung 13 im vorliegenden Fall als Sackbohrung ausgebildet. Die Bohrung 13 könnte aber ebenso als Durchgangsbohrung ausgebildet sein.As can be seen from FIG. 2, the bore 13 is arranged axially to the threaded bore 12, both the threaded bore 12 and the bore 13 being arranged outside the line of symmetry of the pouring nut 6, that is to say eccentrically. As a result, the pouring nut 6 can be kept compact. As can also be seen from FIG. 2, the bore 13 is designed as a blind bore in the present case. The bore 13 could also be designed as a through bore.

FIG 3 zeigt eine weitere Ausführungsform der Verbindung zwischen Anschlußdraht 7 und Anschlußelement 8. Der wesentliche Unterschied zur ersten Ausführungsform besteht darin, daß die Bohrung 13 nicht axial, sondern radial zur Gewindebohrung 12 angeordnet ist. Auch ist in diesem Ausführungsbeispiel die Bohrung 13 als Durchgangsbohrung ausgebildet. Sie könnte aber, so wie in FIG 2 dargestellt, auch als Sackbohrung ausgebildet sein.3 shows a further embodiment of the connection between connecting wire 7 and connecting element 8. The main difference from the first embodiment is that the bore 13 is not arranged axially but radially to the threaded bore 12. In this embodiment, the bore 13 is also formed as a through bore. However, as shown in FIG. 2, it could also be designed as a blind bore.

Obenstehend beschriebene Erfindung ist besonders vorteilhaft dann, wenn das Anschlußelement 6, 8 aus Messing besteht und der Anschlußdraht 5, 7 aus Kupfer. Insbesondere bei dieser Kombination ist nämlich bei Lötungen Flußmittel erforderlich, was sich nur unter großem Arbeitsaufwand wieder entfernen läßt. Andere Arbeitsverfahren wie beispielsweise Schweißen oder Quetschen sind dagegen aus anderen technischen Gründen nicht möglich.The invention described above is particularly advantageous when the connecting element 6, 8 is made of brass and the connecting wire 5, 7 is made of copper. With this combination in particular, flux is required for soldering, which can only be removed again with great effort. However, other working methods such as welding or squeezing are not possible for other technical reasons.

Insbesondere bei der Kombination "Messing für Eingießmutter und Kupfer für Anschlußdraht" ermöglicht die vorliegende Erfindung daher eine große Kostenersparnis. Es sind aber auch andere Materialkombinationen, z.B. in Verbindung mit Aluminium, möglich. Selbstverständlich sind die oben beschrieben Merkmale beliebig im Rahmen des fachmännischen Könnens kombinierbar, ohne daß der Weg der vorliegenden Idee verlassen wird.The present invention therefore enables great cost savings, in particular in the combination "brass for casting nut and copper for connecting wire". However, other material combinations, for example in connection with aluminum, are also possible. Of course, they are described above Features can be combined in any way within the scope of professional skill, without leaving the path of the present idea.

Claims (9)

Gießharztransformator mit mindestens einer Primärwicklung (1), mindestens einer Sekundärwicklung (2) und mindestens einem mit eingegossenen Anschlußelement (6,8), das über einen Anschlußdraht (5,7) mit der Primärwicklung (1) oder der Sekundärwicklung (2) leitend verbunden ist und an das, z.B. mittels Schraubverbindung, eine transformatorexterne Anschlußleitung (9,10) anschließbar ist, wobei das Anschlußelement (6,8) eine Bohrung (13) zur Aufnahme des Anschlußdrahtes (5,7) aufweist und der Anschlußdraht (5,7) in die Bohrung (13) eingeführt ist, dadurch gekennzeichnet, daß der Anschlußdraht (5,7) im Bereich des Anschlußelements (6,8) eine Verformung (14) aufweist, derart, daß der Anschlußdraht (5,7) mechanisch fest und elektrisch leitend mit dem Anschlußelement (6,8) verbunden ist.Cast resin transformer with at least one primary winding (1), at least one secondary winding (2) and at least one with a cast-in connection element (6,8), which is conductively connected to the primary winding (1) or the secondary winding (2) via a connecting wire (5,7) and to which, for example by means of a screw connection, a connection line (9, 10) external to the transformer can be connected, the connection element (6, 8) having a bore (13) for receiving the connection wire (5, 7) and the connection wire (5, 7 ) is inserted into the bore (13), characterized in that the connecting wire (5, 7) has a deformation (14) in the region of the connecting element (6, 8) such that the connecting wire (5, 7) is mechanically firm and is electrically conductively connected to the connecting element (6, 8). Gießharztransformator nach Anspruch 1, dadurch gekennzeichnet, daß die Verformung (14) als Aufbauchung (14) ausgebildet ist.Cast resin transformer according to claim 1, characterized in that the deformation (14) is designed as a bulge (14). Gießharztransformator nach Anspruch 2, dadurch gekennzeichnet, daß die Aufbauchung (14) durch Stauchen bewirkt ist.Cast resin transformer according to claim 2, characterized in that the bulge (14) is caused by upsetting. Gießharztransformator nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Bohrung (13) als Sackbohrung (13) ausgebildet ist.Cast resin transformer according to claim 1, 2 or 3, characterized in that the bore (13) is designed as a blind bore (13). Gießharztransformator nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Bohrung (13) als Durchgangsbohrung (13) ausgebildet ist.Cast resin transformer according to claim 1, 2 or 3, characterized in that the bore (13) is designed as a through bore (13). Gießharztransformator nach einem der obigen Ansprüche dadurch gekennzeichnet, - daß das Anschlußelement (6,8) eine Gewindebohrung (12) zur Aufnahme einer Schraube zum Anschließen der Anschlußleitung (9,10) aufweist und - daß die Bohrung (13) radial zur Gewindebohrung (12) angeordnet ist. Cast resin transformer according to one of the above claims, characterized in - That the connecting element (6,8) has a threaded bore (12) for receiving a screw for connecting the connecting line (9,10) and - That the bore (13) is arranged radially to the threaded bore (12). Gießharztransformator nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, - daß das Anschlußelement (6,8) eine Gewindebohrung (12) zur Aufnahme einer Schraube zum Anschließen der Anschlußleitung (9,10) aufweist und - daß die Bohrung (13) axial zur Gewindebohrung (12) angeordnet ist. Cast resin transformer according to one of claims 1 to 5, characterized in - That the connecting element (6,8) has a threaded bore (12) for receiving a screw for connecting the connecting line (9,10) and - That the bore (13) is arranged axially to the threaded bore (12). Gießharztransformator nach Anspruch 7, dadurch gekennzeichnet, daß die Gewindebohrung (12) und/oder die Bohrung (13) exzentrisch angeordnet sind.Cast resin transformer according to claim 7, characterized in that the threaded bore (12) and / or the bore (13) are arranged eccentrically. Gießharztransformator nach einem der obigen Ansprüche, dadurch gekennzeichnet, daß das Anschlußelement (6,8) aus Messing besteht und/oder der Anschlußdraht (5,7) aus Kupfer besteht.Cast resin transformer according to one of the above claims, characterized in that the connecting element (6, 8) consists of brass and / or the connecting wire (5, 7) consists of copper.
EP95116433A 1994-10-28 1995-10-18 Transformer encapsulated in cast resin Expired - Lifetime EP0709864B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4438653 1994-10-28
DE4438653A DE4438653C1 (en) 1994-10-28 1994-10-28 Cast resin transformer

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EP0709864A2 true EP0709864A2 (en) 1996-05-01
EP0709864A3 EP0709864A3 (en) 1996-06-05
EP0709864B1 EP0709864B1 (en) 1999-01-13

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EP95116433A Expired - Lifetime EP0709864B1 (en) 1994-10-28 1995-10-18 Transformer encapsulated in cast resin

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EP (1) EP0709864B1 (en)
AT (1) ATE175806T1 (en)
DE (2) DE4438653C1 (en)
ES (1) ES2127451T3 (en)

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WO2012123341A3 (en) * 2011-03-11 2012-12-20 REO TRAIN TECHNOLOGIES GmbH Electrical component comprising at least one electrical power loss source arranged in a casting compound and a cooling device

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DE3743222A1 (en) * 1987-12-19 1989-06-29 Asea Brown Boveri COOLED CHOICE COIL FOR RECTIFIER SYSTEMS
DE9114654U1 (en) * 1991-11-25 1992-04-30 Elektro-Kern GmbH & Co KG, 7990 Friedrichshafen Magnetic coil

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Publication number Priority date Publication date Assignee Title
US3838372A (en) 1971-10-29 1974-09-24 Motorola Inc Magnetic pickup assembly
DE2904746A1 (en) 1979-02-08 1980-08-28 Smit Transformatoren Bv WINDING FOR AN AIR-COOLED DRY TRANSFORMER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012123341A3 (en) * 2011-03-11 2012-12-20 REO TRAIN TECHNOLOGIES GmbH Electrical component comprising at least one electrical power loss source arranged in a casting compound and a cooling device

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Publication number Publication date
ES2127451T3 (en) 1999-04-16
EP0709864A3 (en) 1996-06-05
DE4438653C1 (en) 1996-06-20
EP0709864B1 (en) 1999-01-13
DE59504800D1 (en) 1999-02-25
ATE175806T1 (en) 1999-01-15

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