EP3400603B1 - Winding arrangement with a plug lead-through - Google Patents

Winding arrangement with a plug lead-through Download PDF

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Publication number
EP3400603B1
EP3400603B1 EP17705328.7A EP17705328A EP3400603B1 EP 3400603 B1 EP3400603 B1 EP 3400603B1 EP 17705328 A EP17705328 A EP 17705328A EP 3400603 B1 EP3400603 B1 EP 3400603B1
Authority
EP
European Patent Office
Prior art keywords
winding
bushing
plug
solid insulation
insulation
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.)
Active
Application number
EP17705328.7A
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German (de)
French (fr)
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EP3400603A1 (en
Inventor
Richard Sille
Tim-Felix Mai
Steffen Weinert
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Siemens Energy Global GmbH and Co KG
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Siemens Energy Global GmbH and Co KG
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Publication of EP3400603A1 publication Critical patent/EP3400603A1/en
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Classifications

    • 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
    • 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
    • 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
    • H01F27/2823—Wires
    • H01F27/2828—Construction of conductive connections, of 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
    • H01F27/28—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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/10—Connecting leads to windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/12—Insulating of windings
    • H01F41/125—Other insulating structures; Insulating between coil and core, between different winding sections, around the coil

Definitions

  • the invention relates to a winding arrangement for a transformer or a choke with a winding formed from a winding conductor, solid insulation surrounding the winding and a connection unit embedded in the solid insulation, the connection unit being a plug-in bushing and designed for connecting a cable plug.
  • the invention also relates to a method for producing a winding arrangement for a transformer or a choke, in which a winding formed from a winding conductor is embedded in solid insulation and the solid insulation is molded onto a plug-in bushing for connecting a cable connector.
  • Such a winding arrangement is from U.S. 7,834,736 B1 already known.
  • the winding arrangement shown there is intended for a transformer or a choke and consists of windings, each of which is formed from a winding conductor.
  • the windings enclose an annular core, with a low-voltage winding and a high-voltage winding being arranged concentrically with one another.
  • the high-voltage winding is connected to a plug-in bushing via a connecting line, the plug-in bushing being molded onto an insulating body in which the high-voltage winding is embedded.
  • the stated bushing is individually manufactured at the same time as the production of the transformer.
  • winding arrangement mentioned above which is also referred to as a dry winding, is also known to the person skilled in the art from constant practice.
  • commercially available transformers have winding arrangements that consist of a winding that is embedded in solid insulation as a matrix.
  • the previously known winding arrangements are hollow-cylindrical, so that they can accommodate a low-voltage winding and an iron core formed from laminations in their winding interior. If a voltage of up to 36 kV is therefore applied to such a previously known winding arrangement, the magnetic field propagating in the core induces a voltage in the low-voltage winding.
  • the winding arrangement is usually equipped with a support to which a cable lug of a high-voltage cable can be screwed.
  • winding arrangements which have a plug-in bushing as the connection unit, the connection unit being installed in a switching strip.
  • a winding arrangement has the disadvantage that the configuration and design of the connection unit limits the operating voltages.
  • the previously known winding arrangement does not have the dielectric strength required to be used for operating voltages of more than 40 kV.
  • the object of the invention is therefore to provide a winding arrangement of the type mentioned in the introduction, in which the production of the connection is simplified and the electric strength is improved.
  • the invention achieves this object in that the plug-in bushing has a flange section formed from solid insulation and is connected via the flange section to a receiving section of the solid insulation, which protrudes from an outer surface of the solid insulation.
  • connection unit was designed as a plug-in bushing, the plug-in bushing being embedded in the solid insulation of the winding, in contrast to the prior art.
  • a plug-in bushing differs from the previous ones in the solid insulation embedded supporter in that a cable connector available on the market can be connected to the plug-in bushing in a simple manner.
  • the connection of the winding arrangement to a high voltage is therefore simplified within the scope of the invention.
  • Plug-in bushings are already known as such and are available on the market. Previously known plug connections are used in particular when the operating voltages for the winding arrangement are above 40 kV. In connection with transformers, plug-in bushings are mainly used in oil-filled transformers. According to the invention, a commercially available plug-in bushing is processed so that it can then be embedded in the solid insulation of the winding.
  • the plug-in bushing advantageously has a standardized cable connection socket. According to this advantageous further development, contact can be made with the winding arrangement using commercially available standardized cable plugs.
  • the plug-in bushing is dimensioned depending on the required operating voltage.
  • the plug-in bushing has a dielectric strength that is necessary for this.
  • the plug-in bushing is dimensioned depending on the operating voltage required in each case.
  • each plug-in bushing has a phase conductor which extends through bushing insulation consisting of a solid body, with field control elements being embedded in the bushing insulation.
  • field control elements With the help of the field control elements, it is possible to avoid high electric field strengths that can arise during operation between the phase conductor of the plug-in bushing and the outer surface of the solid insulation, which is usually at ground potential.
  • the plug-in bushing has a flange section formed from solid insulation and is connected via the flange section to a receiving section of the solid insulation, which protrudes from an outer surface of the solid insulation.
  • the solid insulation has a receiving section which is designed to be complementary in shape to that side of the plug-in bushing which faces the solid insulation.
  • the winding arrangement generally has a hollow-cylindrical winding interior, which is used to accommodate a low-voltage winding and/or a leg of an iron core.
  • the circumferentially closed winding extends completely within the solid insulation, the outer shell of which is therefore also essentially cylindrical.
  • the receiving section protrudes essentially at right angles from the cylindrical outer contour.
  • An electrical connection conductor extending through the receiving section connects a terminal of the embedded winding to a phase conductor of the plug-in bushing. In this way, all electrical conductors are embedded in a solid insulating material, resulting in the necessary dielectric strength.
  • the receiving section is expediently designed in the shape of a cylinder.
  • a cylindrical configuration provides symmetrical insulation that is uniform on all sides.
  • the plug-in bushing has a connection side and a winding side facing the solid insulation, which is remote from the connection side.
  • the winding side is provided with recesses.
  • the recesses increase the surface area of the socket outlet on the side on which the socket outlet connected to the solid insulation.
  • Each recess enlarges the surface of the plug-in bushing, so that when the solid insulation hardens, a firmer hold of the plug-in bushing on the solid insulation is provided due to the material connection that is established.
  • a peripherally closed circumferential channel structure with a rectangular cross section can be considered as a recess.
  • Particular advantages result, however, when the recesses have rounded, closed groove structures running all the way around.
  • Such a grooved structure enables the solid insulation to engage behind the plug-in bushing in the area of the recesses, so that in addition to a material connection, a positive connection is also made possible between the hardened solid insulation and the insulation of the plug-in bushing.
  • the invention achieves the object in that the plug-in bushing has a flange section formed from solid insulation and is connected via the flange section to a receiving section of the solid insulation, which protrudes from the solid insulation on an outer surface of the latter.
  • the plug-in bushing is provided with recesses on its winding side facing the solid insulation before it is embedded in the solid insulation.
  • the recesses serve to increase the surface area, so that the solid insulation rests against the plug-in bushing over a larger surface area. This results in a firm hold.
  • Channels here have a rectangular structure, while grooves have an arcuate cross-section.
  • FIG. 1 shows an embodiment of the winding arrangement 1 according to the invention in a perspective view.
  • the winding arrangement 1 has a cylindrical interior space 2 for accommodating a low-voltage winding and a leg of an iron core of a transformer.
  • the outer shell or in other words the outer contour is essentially cylindrical, with the winding arrangement 1 having a connection side 3 which is flattened compared to the cylindrical outer shell.
  • two receiving sections 4 protrude, which are cylindrical in the exemplary embodiment shown.
  • the receiving sections 4 extend at right angles to a central axis of the cylindrical interior 2 and each serve to receive a plug-in bushing 5, with each plug-in bushing 5 being seated on the respective receiving section 4 with a disk-shaped flange section.
  • the figures 2 and 3 show the plug-in bushing 5 in more detail.
  • the plug-in bushings 5 have a cable side 7 and a winding side 8 . There they are Cable side 7 and the winding side 8 separated by the disc-shaped flange portion 6 from each other.
  • a column section 9 which is designed conically or in other words in the shape of a truncated cone.
  • the column section 9 encloses a conductor 10, on the free end of which, facing away from the flange section 6, a threaded connection 11 is formed in the form of an internal thread.
  • the column section 9 is designed to complement a standardized cable connector, which is not shown in the figure.
  • the entire implementation is therefore also standardized, with the standard corresponding to EN 50181, for example.
  • the standard specifies, for example, the size of the internal thread, for example M16, and the dimensions and type of the truncated column section.
  • the internal thread 11 is used to fix the cable conductor, which extends inside a connector head. The connector head is slipped over the column section.
  • the conductor 10 of the plug-in bushing 5 extends from the cable side 7 centrally through the column section 9 and can be contacted on the winding side 8 with a winding arranged in the solid insulation of the winding arrangement 1 .
  • the conductor 10 protrudes through a step section 12 of the plug-in bushing 5 on the winding side, which figure 3 is particularly recognizable.
  • the step section 12 has circumferentially closed grooves 13 as receptacles, with which the surface of the plug-in bushing 5 on the winding side 8 is enlarged. Due to the enlarged outer surface of the plug-in bushing 5, an improved material connection between the plug-in bushing 5 and the solid insulation of the winding arrangement 1 is made possible.
  • the conductor 10 consists of an electrically conductive material which is completely embedded in a bushing insulation consisting of an insulating material.
  • field control elements (not shown in the figures) are embedded in the bushing insulation.
  • FIG 4 illustrates a preferred exemplary embodiment of the method according to the invention, in which the bushing 5 is formed onto the solid insulation of the winding arrangement 1.
  • the conductor 10 extends from the cable connector socket 11 through the entire bushing insulation, which consists of an electrically non-conductive material, for example a suitable resin.
  • the threaded connection 11 is designed as a cylindrical blind opening.
  • a winding connection 14 in the form of a threaded opening is introduced into the conductor 10 on the winding side 8 .
  • a metallic shielding arrangement or shielding element 15 is mounted.
  • the shielding element 15 is electrically conductively connected to the conductor 10 .
  • a casting mold 16 can also be seen, which consists of a receiving section mold 17 which is firmly connected to the remaining components of the casting mold 16 via connecting means 18 .
  • the receiving section mold 17 On its side facing away from the fastening means 18 , the receiving section mold 17 is equipped with holding means 19 which comprise a clamping ring 20 which is set up for clamping the holding means 19 on the receiving section mold 17 .
  • the clamping ring 20 encompasses the shape of the receiving section 17 circumferentially.
  • the clamping ring 20 has a through-opening with an internal thread which is in engagement with a clamping screw 21 in each case.
  • the clamping screws 21 extend through clamping brackets 22 and through an abutment 23, the abutment 23 being seated on the upper edge of the receiving section mold 17.
  • the flange section 6 of the plug-in bushing 5 extends between the clamping brackets 22 and the abutment 23 so that the plug-in bushing 5 is held firmly on the receiving section shape 17 by turning the clamping screws 21 .
  • the in figure 3 illustrated grooves 13 introduced.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Insulating Of Coils (AREA)

Description

Die Erfindung betrifft eine Wicklungsanordnung für einen Transformator oder eine Drossel mit einer aus einem Wicklungsleiter gebildeten Wicklung, einer die Wicklung umschließenden Feststoffisolierung und einer in die Feststoffisolierung eingebetteten Anschlusseinheit, wobei die Anschlusseinheit eine Steckdurchführung und zum Anschluss eines Kabelsteckers eingerichtet ist.The invention relates to a winding arrangement for a transformer or a choke with a winding formed from a winding conductor, solid insulation surrounding the winding and a connection unit embedded in the solid insulation, the connection unit being a plug-in bushing and designed for connecting a cable plug.

Die Erfindung betrifft ferner ein Verfahren zum Herstellen einer Wicklungsanordnung für einen Transformator oder eine Drossel, bei dem eine aus einem Wicklungsleiter gebildete Wicklung in eine Feststoffisolierung eingebettet wird und die Feststoffisolierung an eine Steckdurchführung zum Anschluss eines Kabelsteckers angeformt wird.The invention also relates to a method for producing a winding arrangement for a transformer or a choke, in which a winding formed from a winding conductor is embedded in solid insulation and the solid insulation is molded onto a plug-in bushing for connecting a cable connector.

Eine solche Wicklungsanordnung ist aus der US 7,834,736 B1 bereits bekannt. Die dort gezeigte Wicklungsanordnung ist für einen Transformator oder eine Drossel vorgesehen und besteht aus Wicklungen, die jeweils aus einem Wicklungsleiter gebildet ist. Die Wicklungen umschließen einen ringförmigen Kern, wobei eine Unterspannungswicklung und eine Oberspannungswicklung konzentrisch zueinander angeordnet sind. Die Oberspannungswicklung ist über eine Anschlussleitung mit einer Steckdurchführung verbunden, wobei die Steckdurchführung an einen Isolierkörper angeformt ist, in dem die Oberspannungswicklung eingebettet ist. Die genannte Durchführung wird gemäß dem Stand der Technik bei der Herstellung des Transformators aufwändig individuell mitgefertigt.Such a winding arrangement is from U.S. 7,834,736 B1 already known. The winding arrangement shown there is intended for a transformer or a choke and consists of windings, each of which is formed from a winding conductor. The windings enclose an annular core, with a low-voltage winding and a high-voltage winding being arranged concentrically with one another. The high-voltage winding is connected to a plug-in bushing via a connecting line, the plug-in bushing being molded onto an insulating body in which the high-voltage winding is embedded. According to the state of the art, the stated bushing is individually manufactured at the same time as the production of the transformer.

Die oben genannte Wicklungsanordnung, die auch als Trockenwicklung bezeichnet wird, ist dem Fachmann auch aus der ständigen Praxis bekannt. So weisen marktübliche Transformatoren Wicklungsanordnungen auf, die aus einer Wicklung bestehen, die in eine Feststoffisolierung als Matrix eingebettet ist.The winding arrangement mentioned above, which is also referred to as a dry winding, is also known to the person skilled in the art from constant practice. For example, commercially available transformers have winding arrangements that consist of a winding that is embedded in solid insulation as a matrix.

Die vorbekannten Wicklungsanordnungen sind hohlzylindrisch ausgebildet, so dass sie in ihrem Wicklungsinneren eine Unterspannungswicklung und einen aus Lamellen gebildeten Eisenkern aufnehmen kann. Wird an einer solchen vorbekannten Wicklungsanordnung daher eine Spannung bis zu 36kV angelegt, induziert das sich im Kern ausbreitende Magnetfeld eine Spannung in der Unterspannungswicklung. Zum Anschluss einer Hochspannung ist die Wicklungsanordnung in der Regel mit einem Stützer ausgerüstet, mit dem ein Kabelschuh eines Hochspannungskabels verschraubbar ist.The previously known winding arrangements are hollow-cylindrical, so that they can accommodate a low-voltage winding and an iron core formed from laminations in their winding interior. If a voltage of up to 36 kV is therefore applied to such a previously known winding arrangement, the magnetic field propagating in the core induces a voltage in the low-voltage winding. To connect a high voltage, the winding arrangement is usually equipped with a support to which a cable lug of a high-voltage cable can be screwed.

Darüber hinaus sind Wicklungsanordnungen bekannt, die als Anschlusseinheit eine Steckdurchführung aufweisen, wobei die Anschlusseinheit in einer Schaltleiste verbaut ist. Eine solche Wicklungsanordnung weist jedoch den Nachteil auf, dass die Ausgestaltung und Ausführung der Anschlusseinheit die Betriebsspannungen begrenzt. Mit anderen Worten weist die vorbekannte Wicklungsanordnung nicht die notwendige Spannungsfestigkeit auf, um für Betriebsspannungen von über 40kV eingesetzt zu werden.In addition, winding arrangements are known which have a plug-in bushing as the connection unit, the connection unit being installed in a switching strip. However, such a winding arrangement has the disadvantage that the configuration and design of the connection unit limits the operating voltages. In other words, the previously known winding arrangement does not have the dielectric strength required to be used for operating voltages of more than 40 kV.

Aufgabe der Erfindung ist es daher, eine Wicklungsanordnung der eingangs genannten Art bereitzustellen, bei der die Herstellung des Anschlusses vereinfacht und die Spannungsfestigkeit verbessert wird.The object of the invention is therefore to provide a winding arrangement of the type mentioned in the introduction, in which the production of the connection is simplified and the electric strength is improved.

Die Erfindung löst diese Aufgabe dadurch, dass die Steckdurchführung einen aus einer Feststoffisolierung gebildeten Flanschabschnitt aufweist und über den Flanschabschnitt mit einem Aufnahmeabschnitt der Feststoffisolierung verbunden ist, der an einer Außenfläche der Feststoffisolierung von dieser aufragt.The invention achieves this object in that the plug-in bushing has a flange section formed from solid insulation and is connected via the flange section to a receiving section of the solid insulation, which protrudes from an outer surface of the solid insulation.

Im Rahmen der Erfindung wurde die Anschlusseinheit als Steckdurchführung ausgebildet, wobei die Steckdurchführung im Gegensatz zum Stand der Technik in die Feststoffisolierung der Wicklung eingebettet ist. Eine solche Steckdurchführung unterscheidet sich von den bislang in die Feststoffisolierung eingebetteten Stützer dadurch, dass ein am Markt erhältlicher Kabelstecker auf einfache Art und Weise mit der Steckdurchführung verbindbar ist. Der Anschluss der Wicklungsanordnung an eine Hochspannung ist daher im Rahmen der Erfindung vereinfacht.In the context of the invention, the connection unit was designed as a plug-in bushing, the plug-in bushing being embedded in the solid insulation of the winding, in contrast to the prior art. Such a plug-in bushing differs from the previous ones in the solid insulation embedded supporter in that a cable connector available on the market can be connected to the plug-in bushing in a simple manner. The connection of the winding arrangement to a high voltage is therefore simplified within the scope of the invention.

Steckdurchführungen sind als solche bereits bekannt und am Markt erhältlich. So kommen vorbekannte Steckverbindungen insbesondere dann zur Anwendung, wenn die Betriebsspannungen für die Wicklungsanordnung oberhalb von 40kV liegen. Im Zusammenhang mit Transformatoren werden Steckdurchführungen im Wesentlichen bei Öltransformatoren eingesetzt. Erfindungsgemäß wird eine marktübliche Steckdurchführung bearbeitet, um anschließend in die Feststoffisolierung der Wicklung eingebettet werden zu können.Plug-in bushings are already known as such and are available on the market. Previously known plug connections are used in particular when the operating voltages for the winding arrangement are above 40 kV. In connection with transformers, plug-in bushings are mainly used in oil-filled transformers. According to the invention, a commercially available plug-in bushing is processed so that it can then be embedded in the solid insulation of the winding.

Vorteilhafterweise weist die Steckdurchführung eine genormte Kabelanschlussbuchse auf. Gemäß dieser vorteilhaften Weiterentwicklung kann die Wicklungsanordnung mit Hilfe markterhältlicher genormter Kabelstecker kontaktiert werden. Darüber hinaus ist die Steckdurchführung in Abhängigkeit einer jeweils geforderten Betriebsspannung dimensioniert. Insbesondere weist die Steckdurchführung eine hierfür notwendige Spannungsfestigkeit auf. Mit anderen Worten ist die Steckdurchführung in Abhängigkeit der jeweils geforderten Betriebsspannung dimensioniert.The plug-in bushing advantageously has a standardized cable connection socket. According to this advantageous further development, contact can be made with the winding arrangement using commercially available standardized cable plugs. In addition, the plug-in bushing is dimensioned depending on the required operating voltage. In particular, the plug-in bushing has a dielectric strength that is necessary for this. In other words, the plug-in bushing is dimensioned depending on the operating voltage required in each case.

Gemäß einer Variante der Erfindung weist jede Steckdurchführung einen Phasenleiter auf, der sich durch eine aus einem Festkörper bestehende Durchführungsisolierung erstreckt, wobei in der Durchführungsisolierung Feldsteuerelemente eingebettet sind. Mit Hilfe der Feldsteuerelemente ist es möglich, hohe elektrische Feldstärken, die während des Betriebs zwischen dem Phasenleiter der Steckdurchführung und dem üblicherweise auf Erdpotenzial liegenden äußeren Oberfläche der Feststoffisolierung entstehen können zu vermeiden.According to a variant of the invention, each plug-in bushing has a phase conductor which extends through bushing insulation consisting of a solid body, with field control elements being embedded in the bushing insulation. With the help of the field control elements, it is possible to avoid high electric field strengths that can arise during operation between the phase conductor of the plug-in bushing and the outer surface of the solid insulation, which is usually at ground potential.

Erfindungsgemäß weist die Steckdurchführung einen aus einer Feststoffisolierung gebildeten Flanschabschnitt auf und ist über den Flanschabschnitt mit einem Aufnahmeabschnitt der Feststoffisolierung verbunden, der an eine Außenfläche der Feststoffisolierung von dieser aufragt. Gemäß dieser vorteilhaften Weiterentwicklung verfügt die Feststoffisolierung über einen Aufnahmeabschnitt, der formkomplementär zu der der Feststoffisolierung zugewandten Seite der Steckdurchführung ausgebildet ist. Eine solche Ausgestaltung wird beispielsweise erreicht, indem die Steckdurchführung vor dem Vergießen mit einem Formteil verbunden wird. Nach dem Aushärten des Isolierstoffs wird das Formteil entfernt.According to the invention, the plug-in bushing has a flange section formed from solid insulation and is connected via the flange section to a receiving section of the solid insulation, which protrudes from an outer surface of the solid insulation. According to this advantageous further development, the solid insulation has a receiving section which is designed to be complementary in shape to that side of the plug-in bushing which faces the solid insulation. Such a configuration is achieved, for example, by connecting the plug-in bushing to a molded part before casting. After the insulating material has hardened, the molded part is removed.

Die Wicklungsanordnung weist einen in der Regel hohlzylindrischen Wicklungsinnenraum auf, der zur Aufnahme einer Unterspannungswicklung und/oder eines Schenkels eines Eisenkerns dient. Die umfänglich geschlossene Wicklung erstreckt sich dabei vollständig innerhalb der Feststoffisolierung, deren äußere Einhüllende daher ebenfalls im Wesentlichen zylinderförmig ausgebildet ist. Aus der zylinderförmigen Außenkontur ragt der Aufnahmeabschnitt im Wesentlichen rechtwinklig hervor. Ein sich durch den Aufnahmeabschnitt erstreckender elektrischer Verbindungsleiter verbindet einen Anschluss der eingebetteten Wicklung mit einem Phasenleiter der Steckdurchführung. Auf diese Weise sind alle elektrischen Leiter in einem festen Isolierstoff eingebettet, so dass sich die notwendige Spannungsfestigkeit ergibt.The winding arrangement generally has a hollow-cylindrical winding interior, which is used to accommodate a low-voltage winding and/or a leg of an iron core. The circumferentially closed winding extends completely within the solid insulation, the outer shell of which is therefore also essentially cylindrical. The receiving section protrudes essentially at right angles from the cylindrical outer contour. An electrical connection conductor extending through the receiving section connects a terminal of the embedded winding to a phase conductor of the plug-in bushing. In this way, all electrical conductors are embedded in a solid insulating material, resulting in the necessary dielectric strength.

Zweckmäßigerweise ist der Aufnahmeabschnitt zylinderförmig ausgebildet. Eine zylinderförmige Ausgestaltung bietet eine nach allen Seiten gleichförmige symmetrische Isolierung.The receiving section is expediently designed in the shape of a cylinder. A cylindrical configuration provides symmetrical insulation that is uniform on all sides.

Gemäß einer bevorzugten Ausgestaltung der Erfindung weist die Steckdurchführung eine Anschlussseite und eine der Feststoffisolierung zugewandte Wicklungsseite auf, die von der Anschlussseite abgewandt ist. Dabei ist die Wicklungsseite mit Ausnehmungen versehen. Die Ausnehmungen erhöhen die Oberfläche der Steckdurchführung an der Seite, an der die Steckdurchführung mit der Feststoffisolierung verbunden wird. Jede Ausnehmung vergrößert die Oberfläche der Steckdurchführung, so dass beim Aushärten der Feststoffisolierung aufgrund der sich einstellenden stoffschlüssigen Verbindung ein festerer Halt Steckdurchführung an der Feststoffisolierung bereitgestellt ist. Als Ausnehmung kommt beispielsweise eine umfänglich geschlossen umlaufende Kanalstruktur mit rechtwinkligem Querschnitt in Betracht. Besondere Vorteile ergeben sich jedoch, wenn die Ausnehmungen geschlossen umlaufende abgerundete Rillenstrukturen aufweisen. Eine solche Rillenstruktur ermöglicht der Feststoffisolierung die Steckdurchführung im Bereich der Ausnehmungen zu hintergreifen, so dass neben einer stoff- auch eine formschlüssige Verbindung zwischen der ausgehärteten Feststoffisolierung und der Isolierung der Steckdurchführung ermöglicht ist.According to a preferred embodiment of the invention, the plug-in bushing has a connection side and a winding side facing the solid insulation, which is remote from the connection side. The winding side is provided with recesses. The recesses increase the surface area of the socket outlet on the side on which the socket outlet connected to the solid insulation. Each recess enlarges the surface of the plug-in bushing, so that when the solid insulation hardens, a firmer hold of the plug-in bushing on the solid insulation is provided due to the material connection that is established. For example, a peripherally closed circumferential channel structure with a rectangular cross section can be considered as a recess. Particular advantages result, however, when the recesses have rounded, closed groove structures running all the way around. Such a grooved structure enables the solid insulation to engage behind the plug-in bushing in the area of the recesses, so that in addition to a material connection, a positive connection is also made possible between the hardened solid insulation and the insulation of the plug-in bushing.

Ausgehend von dem eingangs genannten Verfahren löst die Erfindung die Aufgabe dadurch, dass die Steckdurchführung einen aus einer Feststoffisolierung gebildeten Flanschabschnitt aufweist und über den Flanschabschnitt mit einem Aufnahmeabschnitt der Feststoffisolierung verbunden wird, der an einer Außenfläche der Feststoffisolierung von dieser aufragt.Based on the method mentioned at the outset, the invention achieves the object in that the plug-in bushing has a flange section formed from solid insulation and is connected via the flange section to a receiving section of the solid insulation, which protrudes from the solid insulation on an outer surface of the latter.

Gemäß einer diesbezüglich zweckmäßigen Weiterentwicklung wird die Steckdurchführung vor dem Einbetten in die Feststoffisolierung an ihrer der Feststoffisolierung zugewandten Wicklungsseite mit Ausnehmungen versehen. Wie bereits weiter oben ausgeführt wurde, dienen die Ausnehmungen zu einer Erhöhung der Oberfläche, so dass die Feststoffisolierung über einen größeren Flächenbereich an der Steckdurchführung anliegt. Hierdurch ergibt sich ein fester Halt.According to an expedient further development in this regard, the plug-in bushing is provided with recesses on its winding side facing the solid insulation before it is embedded in the solid insulation. As already explained above, the recesses serve to increase the surface area, so that the solid insulation rests against the plug-in bushing over a larger surface area. This results in a firm hold.

Weitere Vorteile ergeben sich, wenn in die Wicklungsseite umfänglich geschlossene Rillen oder Kanäle eingefräst werden. Kanäle weisen hier eine rechteckige Struktur auf, während Rillen im Querschnitt bogenförmig ausgebildet sind.Further advantages result if circumferentially closed grooves or channels are milled into the winding side. Channels here have a rectangular structure, while grooves have an arcuate cross-section.

Weitere zweckmäßige Ausgestaltungen und Vorteile der Erfindung sind Gegenstand der nachfolgenden Beschreibung von Ausführungsbeispielen der Erfindung unter Bezug auf die Figuren der Zeichnung, wobei gleiche Bezugszeichen auf gleich wirkende Bauteile verweisen und wobei

Figur 1
ein Ausführungsbeispiel der erfindungsgemäßen Wicklungsanordnung in einer perspektivischen Ansicht,
Figuren 2 und 3
eine Steckdurchführung der Wicklungsanordnung gemäß Figur 1 und
Figur 4
die Steckdurchführung der Durchführung gemäß Figur 1 in einer geschnittenen Seitenansicht verdeutlichen.
Further expedient refinements and advantages of the invention are the subject of the following description of exemplary embodiments of the invention with reference to the figures of the drawing, in which the same reference symbols refer to components that function in the same way and in which:
figure 1
an embodiment of the winding arrangement according to the invention in a perspective view,
Figures 2 and 3
a plug-in bushing according to the winding arrangement figure 1 and
figure 4
the plug-in bushing according to the bushing figure 1 in a sectioned side view.

Figur 1 zeigt ein Ausführungsbeispiel der erfindungsgemäßen Wicklungsanordnung 1 in einer perspektivischen Darstellung. Es ist erkennbar, dass die Wicklungsanordnung 1 einen zylindrischen Innenraum 2 zur Aufnahme einer Unterspannungswicklung sowie einen Schenkel eines Eisenkerns eines Transformators aufweist. Die Außenhülle oder mit anderen Worten die Außenkontur ist im Wesentlichen zylinderförmig ausgebildet, wobei die Wicklungsanordnung 1 eine Anschlussseite 3 aufweist, die gegenüber der zylindrischen Außenhülle abgeflacht ist. An der Anschlussseite 3 ragen zwei Aufnahmeabschnitte 4 auf, die in dem gezeigten Ausführungsbeispiel zylinderförmig ausgeführt sind. Die Aufnahmeabschnitte 4 erstrecken sich rechtwinklig zu einer Mittenachse des zylindrischen Innenraums 2 und dienen jeweils zur Aufnahme einer Steckdurchführung 5, wobei jede Steckdurchführung 5 mit einem scheibenförmigen Flanschabschnitt auf dem jeweiligen Aufnahmeabschnitt 4 aufsitzt. figure 1 shows an embodiment of the winding arrangement 1 according to the invention in a perspective view. It can be seen that the winding arrangement 1 has a cylindrical interior space 2 for accommodating a low-voltage winding and a leg of an iron core of a transformer. The outer shell or in other words the outer contour is essentially cylindrical, with the winding arrangement 1 having a connection side 3 which is flattened compared to the cylindrical outer shell. On the connection side 3, two receiving sections 4 protrude, which are cylindrical in the exemplary embodiment shown. The receiving sections 4 extend at right angles to a central axis of the cylindrical interior 2 and each serve to receive a plug-in bushing 5, with each plug-in bushing 5 being seated on the respective receiving section 4 with a disk-shaped flange section.

Die Figuren 2 und 3 zeigen die Steckdurchführung 5 genauer. Es ist erkennbar, dass die Steckdurchführungen 5 eine Kabelseite 7 sowie eine Wicklungsseite 8 aufweisen. Dabei sind die Kabelseite 7 und die Wicklungsseite 8 durch den scheibenförmigen Flanschabschnitt 6 voneinander getrennt. Aus dem scheibenförmigen Flanschabschnitt 6 ragt ein Säulenabschnitt 9 hervor, der konisch oder mit anderen Worten kegelstumpfförmig ausgestaltet ist. Dabei umschließt der Säulenabschnitt 9 einen Leiter 10, an dessen vom Flanschabschnitt 6 abgewandten freien Ende ein Gewindeanschluss 11 in Gestalt eines Innengewindes ausgebildet ist. Der Säulenabschnitt 9 ist formkomplementär zu einem genormten figürlich nicht dargestellten Kabelstecker ausgeführt. Die gesamte Durchführung ist daher ebenfalls genormt, wobei die Norm beispielsweise der EN 50181 entspricht. Die Norm legt beispielsweise die Größe des Innengewindes, beispielsweise M16, und die Dimensionierung und den Typus des kegelstumpfförmigen Säulenabschnittes fest. Das Innengewinde 11 dient der Fixierung des Kabelleiters, der sich innerhalb einem Steckerkopf erstreckt. Der Steckerkopf wird über den Säulenabschnitt gestülpt.the figures 2 and 3 show the plug-in bushing 5 in more detail. It can be seen that the plug-in bushings 5 have a cable side 7 and a winding side 8 . There they are Cable side 7 and the winding side 8 separated by the disc-shaped flange portion 6 from each other. From the disk-shaped flange section 6 protrudes a column section 9, which is designed conically or in other words in the shape of a truncated cone. The column section 9 encloses a conductor 10, on the free end of which, facing away from the flange section 6, a threaded connection 11 is formed in the form of an internal thread. The column section 9 is designed to complement a standardized cable connector, which is not shown in the figure. The entire implementation is therefore also standardized, with the standard corresponding to EN 50181, for example. The standard specifies, for example, the size of the internal thread, for example M16, and the dimensions and type of the truncated column section. The internal thread 11 is used to fix the cable conductor, which extends inside a connector head. The connector head is slipped over the column section.

Der Leiter 10 der Steckdurchführung 5 erstreckt sich von der Kabelseite 7 mittig durch den Säulenabschnitt 9 und ist auf der Wicklungsseite 8 mit einer in der Feststoffisolierung der Wicklungsanordnung 1 angeordneten Wicklung kontaktierbar. Dabei durchragt der Leiter 10 auf der Wicklungsseite einen Stufenabschnitt 12 der Steckdurchführung 5, der in Figur 3 besonders gut erkennbar ist. So weist der Stufenabschnitt 12 umfänglich geschlossen umlaufende Rillen 13 als Aufnehmungen auf, mit denen die Oberfläche der Steckdurchführung 5 an der Wicklungsseite 8 vergrößert ist. Aufgrund der vergrößerten Außenfläche der Steckdurchführung 5 ist eine verbesserte stoffschlüssige Verbindung zwischen der Steckdurchführung 5 und der Feststoffisolierung der Wicklungsanordnung 1 ermöglicht. Abschließend sei darauf hingewiesen, dass der Leiter 10 aus einem elektrisch leitenden Material besteht, der vollständig in eine aus einem Isolierstoff bestehende Durchführungsisolierung eingebettet ist.The conductor 10 of the plug-in bushing 5 extends from the cable side 7 centrally through the column section 9 and can be contacted on the winding side 8 with a winding arranged in the solid insulation of the winding arrangement 1 . The conductor 10 protrudes through a step section 12 of the plug-in bushing 5 on the winding side, which figure 3 is particularly recognizable. The step section 12 has circumferentially closed grooves 13 as receptacles, with which the surface of the plug-in bushing 5 on the winding side 8 is enlarged. Due to the enlarged outer surface of the plug-in bushing 5, an improved material connection between the plug-in bushing 5 and the solid insulation of the winding arrangement 1 is made possible. Finally, it should be pointed out that the conductor 10 consists of an electrically conductive material which is completely embedded in a bushing insulation consisting of an insulating material.

Säulenabschnitt 9, Flanschabschnitt 6 und Wicklungsabschnitt 12 bestehen daher aus einem festen Durchführungsisolierstoff.Column section 9, flange section 6 and winding section 12 therefore consist of a solid bushing insulating material.

In der Durchführungsisolierung sind ferner figürlich nicht dargestellte Feldsteuerelemente eingebettet.In addition, field control elements (not shown in the figures) are embedded in the bushing insulation.

Figur 4 verdeutlicht ein bevorzugtes Ausführungsbeispiel des erfindungsgemäßen Verfahrens, bei dem die Durchführung 5 an die Feststoffisolierung der Wicklungsanordnung 1 angeformt wird. In der gezeigten geschnittenen Seitenansicht ist erkennbar, dass sich der Leiter 10 von der Kabelanschlussbuchse 11 durch die gesamte Durchführungsisolierung, die aus einem elektrisch nichtleitenden Material, beispielsweise einem zweckmäßigen Harz, besteht, hindurch erstreckt. Dabei ist der Gewindeanschluss 11 als zylindrische Sacköffnung ausgeführt. figure 4 illustrates a preferred exemplary embodiment of the method according to the invention, in which the bushing 5 is formed onto the solid insulation of the winding arrangement 1. In the sectional side view shown, it can be seen that the conductor 10 extends from the cable connector socket 11 through the entire bushing insulation, which consists of an electrically non-conductive material, for example a suitable resin. The threaded connection 11 is designed as a cylindrical blind opening.

An der Wicklungsseite 8 ist in den Leiter 10 ein Wicklungsanschluss 14 in Gestalt einer Gewindeöffnung eingebracht. Zur Vermeidung hoher Feldstärken an dem Wicklungsleiter 8 ist eine metallische Abschirmanordnung oder Abschirmelement 15 montiert. Das Abschirmelement 15 ist elektrisch leitend mit dem Leiter 10 verbunden.A winding connection 14 in the form of a threaded opening is introduced into the conductor 10 on the winding side 8 . To avoid high field strengths on the winding conductor 8, a metallic shielding arrangement or shielding element 15 is mounted. The shielding element 15 is electrically conductively connected to the conductor 10 .

In Figur 4 ist weiterhin eine Gießform 16 erkennbar, die aus einer Aufnahmeabschnittsform 17 besteht, die über Verbindungsmittel 18 fest mit den restlichen Bestandteilen der Gießform 16 verbunden ist. An ihrer von den Befestigungsmitteln 18 abgewandten Seite ist die Aufnahmeabschnittsform 17 mit Haltemitteln 19 ausgerüstet, die einen Klemmring 20 umfassen, der zum Festklemmen der Haltemittel 19 auf der Aufnahmeabschnittsform 17 eingerichtet ist. Dabei umgreift der Klemmring 20 die Aufnahmeabschnittsform 17 umfänglich. Der Klemmring 20 verfügt über eine Durchgangsöffnung mit Innengewinde, die jeweils mit einer Klemmschraube 21 im Eingriff steht. Die Klemmschrauben 21 erstrecken sich durch Klemmbügel 22 sowie durch ein Wiederlager 23, wobei das Wiederlager 23 auf der oberen Kante der Aufnahmeabschnittsform 17 aufsitzt. Zwischen den Klemmbügeln 22 und dem Wiederlager 23 erstreckt sich der Flanschabschnitt 6 der Steckdurchführung 5, so dass durch Verdrehen der Klemmschrauben 21 die Steckdurchführung 5 fest an der Aufnahmeabschnittsform 17 gehalten ist. Vor dem Verklemmen wurden in die Wicklungsseite die in Figur 3 verdeutlichten Rillen 13 eingebracht.In figure 4 a casting mold 16 can also be seen, which consists of a receiving section mold 17 which is firmly connected to the remaining components of the casting mold 16 via connecting means 18 . On its side facing away from the fastening means 18 , the receiving section mold 17 is equipped with holding means 19 which comprise a clamping ring 20 which is set up for clamping the holding means 19 on the receiving section mold 17 . The clamping ring 20 encompasses the shape of the receiving section 17 circumferentially. The clamping ring 20 has a through-opening with an internal thread which is in engagement with a clamping screw 21 in each case. The clamping screws 21 extend through clamping brackets 22 and through an abutment 23, the abutment 23 being seated on the upper edge of the receiving section mold 17. The flange section 6 of the plug-in bushing 5 extends between the clamping brackets 22 and the abutment 23 so that the plug-in bushing 5 is held firmly on the receiving section shape 17 by turning the clamping screws 21 . Before the Jamming were in the winding side the in figure 3 illustrated grooves 13 introduced.

Nachdem die Steckdurchführung 5, wie in Figur 4 gezeigt, mit der Gießform 16 für die Feststoffisolierung verbunden ist, wird die figürlich nicht dargestellte Wicklung vergossen, wobei der flüssige Isolierstoff, beispielsweise ein flüssiges Harz, in die Gießform 16 gegossen wird. Anschließend wird die Feststoffisolierung ausgehärtet und die Klemmmittel 19 und die Gießform 16 entfernt, so dass die in Figur 1 dargestellte Wicklungsanordnung 1 bereitgestellt ist.After the plug-in bushing 5, as in figure 4 shown, is connected to the mold 16 for the solid insulation, the figuratively not shown winding is cast, wherein the liquid insulating material, for example a liquid resin, is poured into the mold 16. The solid insulation is then hardened and the clamping means 19 and the casting mold 16 are removed, so that the in figure 1 winding arrangement 1 shown is provided.

Claims (7)

  1. Winding arrangement (1) for a transformer or an inductor having
    - a winding formed from a winding conductor,
    - a solid insulation surrounding the winding and
    - a connection unit embedded in the solid insulation, wherein the connection unit is a plug-in bushing (5) and is configured for connection of a cable plug,
    characterized in that
    the plug-in bushing (5) has a flange section (6) formed from a solid insulation and is connected to a receptacle section (4) of the solid insulation by means of the flange section, which receptacle section protrudes from the solid insulation on an outer surface thereof.
  2. Winding arrangement (1) according to Claim 1,
    characterized in that
    each plug-in bushing (5) has a conductor (10), which extends through a bushing insulation consisting of a solid body, wherein field control elements are embedded in the bushing insulation.
  3. Winding arrangement (1) according to Claim 1,
    characterized in that
    the receptacle section (4) is of cylindrical design.
  4. Winding arrangement (1) according to any one of the preceding claims,
    characterized in that
    the plug-in bushing (5) has a connection side (7) and a winding side (8) that faces the solid insulation, wherein the winding side (8) is provided with recesses (13).
  5. Method for producing a winding arrangement (1) for a transformer or an inductor, in which method a winding formed from a winding conductor is embedded in a solid insulation and the solid insulation is integrally formed on a plug-in bushing (5) for connection of a cable plug,
    characterized in that
    the plug-in bushing (5) has a flange section (6) formed from a solid insulation and is connected to a receptacle section (4) of the solid insulation by means of the flange section, which receptacle section protrudes from the solid insulation on an outer surface thereof.
  6. Method according to Claim 5,
    characterized in that
    the plug-in bushing (5) is provided with recesses (13) at the winding side (8) of said plug-in bushing that faces the solid insulation before the embedding in the solid insulation.
  7. Method according to Claim 6,
    characterized in that
    circumferentially closed grooves (13) or channels are milled into the winding side (8).
EP17705328.7A 2016-03-08 2017-02-09 Winding arrangement with a plug lead-through Active EP3400603B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016203776.5A DE102016203776A1 (en) 2016-03-08 2016-03-08 Winding arrangement with plug-in feedthrough
PCT/EP2017/052839 WO2017153115A1 (en) 2016-03-08 2017-02-09 Winding arrangement with a plug lead-through

Publications (2)

Publication Number Publication Date
EP3400603A1 EP3400603A1 (en) 2018-11-14
EP3400603B1 true EP3400603B1 (en) 2022-09-14

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Application Number Title Priority Date Filing Date
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US (1) US11295886B2 (en)
EP (1) EP3400603B1 (en)
CN (2) CN115620992A (en)
CA (1) CA3015116C (en)
DE (1) DE102016203776A1 (en)
DK (1) DK3400603T3 (en)
ES (1) ES2933173T3 (en)
MX (1) MX2018010728A (en)
PL (1) PL3400603T3 (en)
WO (1) WO2017153115A1 (en)

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CN1060580C (en) 1996-01-22 2001-01-10 山东省金曼克电气股份有限公司 Dry transformer of fire-proof epoxy resin
BR9902887C1 (en) 1999-07-22 2001-03-20 Siemens Ltda Distribution transformer
DE102005058119B4 (en) 2005-11-29 2008-01-10 Siemens Ag Fixing device for an electrical winding
DE602006004333D1 (en) * 2006-07-07 2009-01-29 Tinyplug Technology Shenzhen L Plug type power supply unit
DE202007012534U1 (en) * 2007-09-06 2007-11-29 Selbach, Dirk Cable harness production
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EP2431982B1 (en) * 2010-09-21 2014-11-26 ABB Technology AG Plugable feedthrough and high voltage assembly with such a feedthrough
CN201975245U (en) 2010-12-29 2011-09-14 天威云南变压器股份有限公司 Pluggable cable transformer
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BR112018067771A2 (en) 2019-01-15
CA3015116C (en) 2021-02-09
US11295886B2 (en) 2022-04-05
US20190066898A1 (en) 2019-02-28
PL3400603T3 (en) 2022-12-27
EP3400603A1 (en) 2018-11-14
CN115620992A (en) 2023-01-17
DE102016203776A1 (en) 2017-09-14
MX2018010728A (en) 2018-11-09
WO2017153115A1 (en) 2017-09-14
ES2933173T3 (en) 2023-02-02
CN108885934A (en) 2018-11-23
CA3015116A1 (en) 2017-09-14
DK3400603T3 (en) 2022-11-21

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