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EP1769513B1 - Coupling electrode for capacitive voltage tapping within the insulation body of a duct or an insulator - Google Patents

Coupling electrode for capacitive voltage tapping within the insulation body of a duct or an insulator Download PDF

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Publication number
EP1769513B1
EP1769513B1 EP05762939.6A EP05762939A EP1769513B1 EP 1769513 B1 EP1769513 B1 EP 1769513B1 EP 05762939 A EP05762939 A EP 05762939A EP 1769513 B1 EP1769513 B1 EP 1769513B1
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EP
European Patent Office
Prior art keywords
coupling electrode
electrode
insulating body
section
component
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EP05762939.6A
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German (de)
French (fr)
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EP1769513A1 (en
Inventor
Clemens Albert
Wilfried Albert
Stefan Hohmann
Helmut Späck
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Siemens AG
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Siemens AG
Siemens Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/005—Insulators structurally associated with built-in electrical equipment

Definitions

  • the invention relates to a coupling electrode for capacitiveactsabgriff within an insulating body of a component having at least one embedded in the insulator with acted upon high-voltage potential conductor portion having an electrode portion consisting of a semiconductive plastic and electrically connected to the electrode portion connecting element, which can be brought out of the insulating is.
  • the invention further relates to a component having at least one conductor section which can be acted upon by high-voltage potential and an insulating body made of insulating material, in which each conductor section is embedded.
  • the coupling electrode shown there has an annular electrode section of a semiconducting plastic.
  • a connecting element formed as a connecting pin is formed, so that there is an electrically conductive connection between the connecting pin and the electrode portion.
  • the component shown there has an insulating body, in which the said coupling electrode is embedded.
  • the connection element is led out of the insulating body, so that the potential of the electrode section can be tapped by appropriate connector on the connection element.
  • the annular electrode portion encloses a conductor section, which also extends through the insulating body, wherein the conductor portion and the electrode portion are arranged coaxially with each other.
  • the component described is used as a so-called implementation in high and medium voltage technology.
  • the conductor section is subjected to a high-voltage potential, wherein the coupling electrode is used as a capacitive divider element, on which a potential proportional to the high-voltage potential is generated, with which the voltage of the conductor section can be followed.
  • the previously known coupling electrode and the previously known component have the disadvantage that in the production of the insulating body of the component, the coupling electrode must be laboriously positioned on the connecting element. Such a holder of the coupling electrode during the G confusereaes is beyond error prone, so that it can lead to inaccuracies in measurement.
  • the invention has for its object to provide a coupling electrode and a component of the type mentioned, which are inexpensive, with an accurate alignment of the coupling electrode is made possible within the cast-molded insulating.
  • the invention achieves this object by means of a holder consisting of a non-conductive material, which holder is connected to the electrode section and has the parking means with which an insulated mounting of the electrode section is made possible.
  • the coupling electrode has a non-conductive holder. Due to the non-conductivity, it is possible according to the invention, the coupling electrode with the Abstellstoffn the holder, for example on a later in a Application to bring earth potential having area of the component in contact, without affecting the electrical properties of the coupling electrode are adversely affected. In this way, the object of positioning the coupling electrode and the formation of an electrical connection point is separated according to the invention.
  • the insulator consists of cast resin.
  • the selected semiconducting plastic, from which the electrode portion is made, and cast resin have a similar coefficient of thermal expansion, so that in particular at high temperature changes resulting mechanical stresses are avoided within the insulator.
  • a connector connected to a conductor is provided, which can be pushed onto the connection element.
  • the coupling electrode is detachably connectable to other electronic devices, such as protective devices.
  • sealing means are provided which are set up to hold the connection plug in the insulating body.
  • the sealing means are arranged for example before insertion of the connector plug in the insulating body of the component.
  • the connector is then simply plugged into the component and pushed onto the sealant.
  • the sealants also prevent the entry of moisture or other contaminants.
  • the sealant to the connector to attach before it is inserted into the insulating body.
  • the sealing means consist of an elastomer.
  • the elastomer is advantageously an insulating material.
  • the elastomer is, for example, a suitable silicone rubber or the like.
  • the sealing means in the insulating body of the component can be latched.
  • locking grooves are formed in the insulating body, in which the sealing means are pressed when inserting the connector plug.
  • the detent grooves are located, for example, in a recess provided in the insulating body into which the connecting element protrudes.
  • the sealing means have such elasticity that, on the one hand, penetration into the latching grooves and thus engagement behind the device is possible. On the other hand, the elasticity is adjusted so that a sufficiently high holding force is provided to prevent accidental slipping out of the connector plug from the insulating body.
  • the sealing means are for example a single sealing element.
  • the semiconductive plastic contains polyphenylene sulfide and carbon fibers. With this mixture is provided for a sufficiently high conductivity, the coefficient of thermal expansion is largely matched to that of the casting resin commonly used in the production of the insulating body. Mechanical stresses between the electrode portion and the insulating body with Material breaks in the wake are avoided in this way.
  • the semiconductive plastic preferably consists only of the two said components. However, customary additives can also be used in the context of this further development, with the specified proportion of the carbon fibers always referring to the total weight of the electrode section.
  • the proportion of carbon fibers is between 15% by weight and 35% by weight. A carbon fiber content in this range has proven to be sufficient to provide the necessary conductivity.
  • the nonconductive material is polyphenylene sulfide.
  • polyphenylene sulfide has a coefficient of thermal expansion which largely corresponds to that of the casting resin.
  • the non-conductive material comprises a mixture of polyphenylene sulfide and glass fibers.
  • the glass fibers reinforce the holder so that increased mechanical strength is provided. In this way, destruction or deformation of the coupling electrode can be avoided for example in the manufacturing process.
  • the electrode section expediently has a roughened surface.
  • the roughened surface improves the adhesion of the electrode section in the insulating body. This is a free transfer between Ensures electrode portion and insulator and prevents occurrence of discharge processes.
  • the holder has a retaining ring connected to the electrode section.
  • the component according to the invention has a coupling electrode as described above and is easier and less expensive to produce due to the simpler positioning of the coupling electrode.
  • the component is a bushing with the aid of which a passage of conductor sections with a high-voltage potential through a wall subjected to ground potential, for example, is made possible without discharge processes taking place.
  • the component is a so-called supporter whose free ends are connected on the one hand with components at high voltage potential and on the other hand with components at ground potential.
  • the coupling electrode is completely embedded in the insulating body.
  • FIG. 1 shows an embodiment of the coupling electrode 1 according to the invention in a perspective view.
  • the coupling electrode 1 has an annular electrode portion 2 and an electrically connected thereto pin 3 as a connecting element, which in the in FIG. 1 shown example is attached to the lower ring side of the electrode portion 2 and protrudes from there to the outside.
  • the coupling electrode 1 also has a holder 4, which is fixedly connected to the electrode section 2 on its fastening side 5.
  • the holder 4 a clamped to the electrode portion retaining ring 4a are integrally formed on the three identically formed L-shaped support legs 4b.
  • the longer legs of the L-shaped support feet 4b of the holder 4 are designed as free ends, so that parking means 7 are formed. Define the three free ends 7 a flat storage area on which the coupling electrode 1 can be stored safely and stably.
  • the electrode section 2 of the coupling electrode 1 is made of a semiconductive plastic and in this case of polyphenylene sulfide with a carbon content of 30 wt.%.
  • the electrically non-conductive support 4, however, is made of pure polyphenylene sulfide, which has been mechanically reinforced with glass fibers.
  • FIG. 2 and 3 shows an embodiment of a component 8 according to the invention in a cross-sectional view.
  • the component 8 shown here has a rotationally symmetrical insulating body 9, which consists of cast resin.
  • a conductor section 10 extends through, which is equipped at its two free ends with fastening means 11 and 12.
  • fastening means 11, 12 of the conductor portion with high-voltage potential leading conductors can be connected, so that in the operating state of the conductor portion 10 itself is at a high voltage potential.
  • a flange 13 is used, which extends with its free end 14 into the insulating body 9 and sealed there with an elastic material 15 is.
  • the coupling electrode 1 is arranged with its electrode section 2 concentrically around the conductor section 10 and likewise embedded in the insulating body 9.
  • the holder 4 with its Abstellstoffn 7 on the flange 13 is a with a connecting line fourteenth connected connector 15 is provided, wherein the connecting line 14 and up to the pin 3 contacting insertion end and the connector 15 are surrounded by an insulating flexible.
  • the connector 15 is held by insulating means 16, which are made of an elastic and non-conductive material, such as silicone or silicone rubber, insulated from the outside environment to the insulating body 9.
  • insulating means 16 By pressing the connector 15 in a formed in the insulating body 9 recess 17, the sealing means 16 is pressed into locking grooves which are formed in the recess 17. This results in jamming of the connector 15 in the recess 17 by the latched sealing means 16, so that a stable and electrically sealed mounting of the connector 15 is provided.
  • FIG. 3 shows an enlarged view of the connecting line 14 with the connector 15 and the sealing means 16.
  • the electrode portion 2 is clamped on an outer ring portion 4a of the holder 4.
  • the connecting pin 3 is not integrally formed with the electrode portion 2 in the embodiment shown. Rather, the terminal pin 3 is positioned in a press-fit opening of the electrode section 2 and clamped with this.
  • the sealing means 16 are realized in the embodiment shown as a single elastic silicone element.
  • the sealing means 16 can not only extend within the recess 17, but can also be guided out of this.
  • FIG. 4 shows a further embodiment of a component according to the invention, which is a so-called support insulation 18 or in other words is a supporter.
  • the support insulation 18 again has a conductor portion 19 which, however, does not extend completely through the insulating body 9 of the support insulation 18, but has a free end which is completely embedded in the insulating body 9.
  • the conductor section 19 again has fastening means 11 for fastening a conductor, not shown, with high-voltage potential.
  • this forms a storage area, on which the support insulation 18 can be fastened to a surface lying at ground potential.
  • Extending screens 20 serve to increase the creepage distance along the outer surface of the support insulation.
  • connection element 3 which is firmly and electrically conductively connected to the electrode section 2, is not pin-shaped, but bent at a 90 ° angle, with its free end projecting into a recess 21 of the insulating body 9.
  • the insertion end of the connector 15 is adapted to the depth of the recess 21, so that a secured tap of the potential of the electrode portion 2 is made possible also in this embodiment of the component 18.
  • a latchable sealant 16 is used for secure attachment of the connector 15 to the insulating body 9 and the electrical Sealing of the connector 15 and to prevent the entry of moisture into the recess 21st

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  • Connector Housings Or Holding Contact Members (AREA)
  • Insulators (AREA)
  • Communication Cables (AREA)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)

Description

Die Erfindung betrifft eine Koppelelektrode zum kapazitiven Spannungsabgriff innerhalb eines Isolierkörpers eines Bauteils, das wenigstens einen in den Isolierkörper eingebetteten mit Hochspannungspotential beaufschlagbaren Leiterabschnitt aufweist, mit einem aus einem halbleitenden Kunststoff bestehenden Elektrodenabschnitt und einem mit dem Elektrodenabschnitt elektrisch verbundenen Anschlusselement, das aus dem Isolierkörper herausführbar ausgestaltet ist.The invention relates to a coupling electrode for capacitive Spannungsabgriff within an insulating body of a component having at least one embedded in the insulator with acted upon high-voltage potential conductor portion having an electrode portion consisting of a semiconductive plastic and electrically connected to the electrode portion connecting element, which can be brought out of the insulating is.

Die Erfindung betrifft ferner ein Bauteil mit wenigstens einem mit Hochspannungspotential beaufschlagbaren Leiterabschnitt und einem aus Isolierstoff gefertigten Isolierkörper, in dem jeder Leiterabschnitt eingebettet ist.The invention further relates to a component having at least one conductor section which can be acted upon by high-voltage potential and an insulating body made of insulating material, in which each conductor section is embedded.

Eine solche Koppelelektrode und ein solches Bauteil sind aus der EP 0 400 491 A2 bereits bekannt. Die dort gezeigte Koppelelektrode verfügt über einen ringförmigen Elektrodenabschnitt aus einem halbleitenden Kunststoff. An dem Elektrodenabschnitt ist ein als Anschlussstift ausgebildetes Anschlusselement angeformt, so dass zwischen Anschlussstift und Elektrodenabschnitt eine elektrisch leitende Verbindung besteht. Das dort gezeigte Bauteil weist einen Isolierkörper auf, in den die besagte Koppelelektrode eingebettet ist. Dabei ist das Anschlusselement aus dem Isolierkörper herausgeführt, so dass das Potential des Elektrodenabschnittes durch zweckmäßige Anschlussstecker an dem Anschlusselement abgegriffen werden kann. Dabei umschließt der ringförmige Elektrodenabschnitt einen Leiterabschnitt, der sich ebenfalls durch den Isolierkörper hindurch erstreckt, wobei der Leiterabschnitt und der Elektrodenabschnitt koaxial zueinander angeordnet sind. Das beschriebene Bauteil wird als so genannte Durchführung in der Hoch- und Mittelspannungstechnik eingesetzt. Im Betrieb ist der Leiterabschnitt mit einem Hochspannungspotential beaufschlagt, wobei die Koppelelektrode als kapazitives Teilerelement eingesetzt wird, an dem ein zum Hochspannungspotential proportionales Potential erzeugt wird, mit dem die Spannung des Leiterabschnittes verfolgt werden kann. Die vorbekannte Koppelelektrode und das vorbekannte Bauteil weisen den Nachteil auf, dass bei der Herstellung des Isolierkörpers des Bauteils die Koppelelektrode an dem Anschlusselement aufwändig positioniert werden muss. Eine solche Halterung der Koppelelektrode während des Gießformprozesses ist darüber hinaus fehleranfällig, so dass es zu Messungenauigkeiten kommen kann.Such a coupling electrode and such a component are known from EP 0 400 491 A2 already known. The coupling electrode shown there has an annular electrode section of a semiconducting plastic. At the electrode portion, a connecting element formed as a connecting pin is formed, so that there is an electrically conductive connection between the connecting pin and the electrode portion. The component shown there has an insulating body, in which the said coupling electrode is embedded. In this case, the connection element is led out of the insulating body, so that the potential of the electrode section can be tapped by appropriate connector on the connection element. In this case, the annular electrode portion encloses a conductor section, which also extends through the insulating body, wherein the conductor portion and the electrode portion are arranged coaxially with each other. The component described is used as a so-called implementation in high and medium voltage technology. In operation, the conductor section is subjected to a high-voltage potential, wherein the coupling electrode is used as a capacitive divider element, on which a potential proportional to the high-voltage potential is generated, with which the voltage of the conductor section can be followed. The previously known coupling electrode and the previously known component have the disadvantage that in the production of the insulating body of the component, the coupling electrode must be laboriously positioned on the connecting element. Such a holder of the coupling electrode during the Gießformprozesses is beyond error prone, so that it can lead to inaccuracies in measurement.

Aus der DE930777U1 ist eine Koppelelktrode zum kapazitiven Spannungsabgriff innerhalb eines Isolierkörpers bekannt.From the DE930777U1 is a coupling electrode for capacitive voltage tap within an insulating known.

Der Erfindung liegt die Aufgabe zugrunde, eine Koppelelektrode und ein Bauteil der eingangs genannten Art bereitzustellen, die kostengünstig sind, wobei ein genaues Ausrichten der Koppelelektrode innerhalb des gussgeformten Isolierkörpers ermöglicht ist.The invention has for its object to provide a coupling electrode and a component of the type mentioned, which are inexpensive, with an accurate alignment of the coupling electrode is made possible within the cast-molded insulating.

Die Erfindung löst diese Aufgabe durch eine aus einem nicht leitfähigen Material bestehende Halterung, die mit dem Elektrodenabschnitt verbunden ist und die Abstellmittel aufweist, mit denen eine isolierte Lagerung des Elektrodenabschnittes ermöglicht ist.The invention achieves this object by means of a holder consisting of a non-conductive material, which holder is connected to the electrode section and has the parking means with which an insulated mounting of the electrode section is made possible.

Erfindungsgemäß weist die Koppelelektrode eine nicht leitfähige Halterung auf. Aufgrund der Nichtleitfähigkeit ist es erfindungsgemäß möglich, die Koppelelektrode mit den Abstellmitteln der Halterung beispielsweise auf einem in einer späteren Anwendung Erdpotential aufweisenden Bereich des Bauteils in Kontakt zu bringen, ohne dass dadurch die elektrischen Eigenschaften der Koppelelektrode negativ beeinträchtigt sind. Auf diese Weise wird die Aufgabe der Positionierung der Koppelelektrode und der Ausbildung eines elektrischen Anschlusspunktes erfindungsgemäß getrennt.According to the invention, the coupling electrode has a non-conductive holder. Due to the non-conductivity, it is possible according to the invention, the coupling electrode with the Abstellmitteln the holder, for example on a later in a Application to bring earth potential having area of the component in contact, without affecting the electrical properties of the coupling electrode are adversely affected. In this way, the object of positioning the coupling electrode and the formation of an electrical connection point is separated according to the invention.

Zweckmäßigerweise besteht der Isolierkörper aus Gießharz. Der gewählte halbleitende Kunststoff, aus dem der Elektrodenabschnitt gefertigt ist, und Gießharz weisen einen ähnlichen Wärmeausdehnungskoeffizienten auf, so dass insbesondere bei hohen Temperaturänderungen entstehende mechanische Spannungen innerhalb des Isolierkörpers vermieden sind.Conveniently, the insulator consists of cast resin. The selected semiconducting plastic, from which the electrode portion is made, and cast resin have a similar coefficient of thermal expansion, so that in particular at high temperature changes resulting mechanical stresses are avoided within the insulator.

Zweckmäßigerweise ist ein mit einem Leiter verbundener Anschlussstecker vorgesehen, der auf das Anschlusselement aufschiebbar ist. Auf diese Weise ist die Koppelelektrode lösbar mit anderen elektronischen Geräten, beispielsweise Schutzgeräten, verbindbar.Conveniently, a connector connected to a conductor is provided, which can be pushed onto the connection element. In this way, the coupling electrode is detachably connectable to other electronic devices, such as protective devices.

Gemäß einer diesbezüglich zweckmäßigen Weiterentwicklung Dichtmittel vorgesehen, die zum Halten des Anschlusssteckers in dem Isolierkörper eingerichtet sind. Die Dichtmittel sind beispielsweise vor dem Einführen des Anschlusssteckers in dem Isolierkörper des Bauteils angeordnet. Der Anschlussstecker wird dann einfach nachträglich in das Bauteil eingesteckt und dabei auf die Dichtmittel aufgeschoben. Mit Hilfe der Dichtmittel ist neben einem einfachen elektrischen Anschluss der Koppelelektrode auch eine elektrische Isolierung des Anschlusssteckers in dem Bauteil ermöglicht. Die Dichtmittel verhindern darüber hinaus den Eintritt von Feuchtigkeit oder sonstiger Verunreinigungen. Selbstverständlich ist es im Rahmen der Erfindung auch möglich, die Dichtmittel an dem Anschlussstecker zu befestigen, bevor dieser in den Isolierkörper eingeführt wird.According to an expedient further development, sealing means are provided which are set up to hold the connection plug in the insulating body. The sealing means are arranged for example before insertion of the connector plug in the insulating body of the component. The connector is then simply plugged into the component and pushed onto the sealant. With the help of the sealant in addition to a simple electrical connection of the coupling electrode and an electrical insulation of the connector in the component allows. The sealants also prevent the entry of moisture or other contaminants. Of course, it is within the scope of the invention also possible, the sealant to the connector to attach before it is inserted into the insulating body.

Bei einer diesbezüglich zweckmäßigen Weiterentwicklung bestehen die Dichtmittel aus einem Elastomer. Der Elastomer ist vorteilhafterweise ein Isolierstoff. Ein wie aus dem Stand der Technik bekannt gewordenes anschließendes Vergießen des Anschlusssteckers mit Dichtmaterialien entfällt erfindungsgemäß. Das Elastomer ist beispielsweise ein zweckmäßiger Silikonkautschuk oder dergleichen.In an expedient further development, the sealing means consist of an elastomer. The elastomer is advantageously an insulating material. A subsequent casting of the connection plug with sealing materials, which has become known from the prior art, is eliminated according to the invention. The elastomer is, for example, a suitable silicone rubber or the like.

Bei einer bevorzugten Weiterentwicklung der Erfindung sind die Dichtmittel in dem Isolierkörper des Bauteils verrastbar. Hierzu sind in dem Isolierkörper beispielsweise Rastnuten ausgeformt, in welche die Dichtmittel beim Einschieben des Anschlusssteckers gepresst werden. Die Rastnuten befinden sich beispielsweise in einer in dem Isolierkörper vorgesehenen Ausnehmung, in die das Anschlusselement hineinragt. Die Dichtmittel weisen eine solche Elastizität auf, dass einerseits ein Eindringen in die Rastnuten und somit ein Hintergreifen ermöglicht ist. Andererseits ist die Elastizität so eingestellt, dass eine ausreichend hohe Haltekraft bereitgestellt ist, um ein ungewolltes Hinausgleiten des Anschlusssteckers aus dem Isolierkörper zu vermeiden. Die Dichtmittel sind beispielsweise ein einziges Dichtelement.In a preferred development of the invention, the sealing means in the insulating body of the component can be latched. For this purpose, for example, locking grooves are formed in the insulating body, in which the sealing means are pressed when inserting the connector plug. The detent grooves are located, for example, in a recess provided in the insulating body into which the connecting element protrudes. The sealing means have such elasticity that, on the one hand, penetration into the latching grooves and thus engagement behind the device is possible. On the other hand, the elasticity is adjusted so that a sufficiently high holding force is provided to prevent accidental slipping out of the connector plug from the insulating body. The sealing means are for example a single sealing element.

Vorteilhafterweise enthält der halbleiterfähige Kunststoff Polyphenylensulfid und Kohlefasern. Mit dieser Mischung ist für eine ausreichend hohe Leitfähigkeit gesorgt, wobei der Temperaturausdehnungskoeffizient weitestgehend an denjenigen des üblicherweise bei der Herstellung des Isolierkörpers verwendeten Gießharzes angepasst ist. Mechanische Spannungen zwischen dem Elektrodenabschnitt und dem Isolierkörper mit Materialbrüchen im Gefolge werden auf diese Weise vermieden. Der halbleitfähige Kunststoff besteht vorzugsweise nur aus den beiden besagten Bestandteilen. Jedoch sind im Rahmen dieser Weiterentwicklung auch übliche Zusatzstoffe einsetzbar, wobei sich der angegebene Anteil der Kohlenstofffasern immer auf das Gesamtgewicht des Elektrodenabschnitts bezieht.Advantageously, the semiconductive plastic contains polyphenylene sulfide and carbon fibers. With this mixture is provided for a sufficiently high conductivity, the coefficient of thermal expansion is largely matched to that of the casting resin commonly used in the production of the insulating body. Mechanical stresses between the electrode portion and the insulating body with Material breaks in the wake are avoided in this way. The semiconductive plastic preferably consists only of the two said components. However, customary additives can also be used in the context of this further development, with the specified proportion of the carbon fibers always referring to the total weight of the electrode section.

Gemäß einer diesbezüglich zweckmäßigen Weiterentwicklung liegt der Anteil der Kohlefasern zwischen 15 Gew.-% und 35 Gew.-%. Ein Kohlefaseranteil in diesem Bereich hat sich als ausreichend erwiesen, um die notwendige Leitfähigkeit bereitzustellen.According to an expedient further development, the proportion of carbon fibers is between 15% by weight and 35% by weight. A carbon fiber content in this range has proven to be sufficient to provide the necessary conductivity.

Vorteilhafterweise besteht das nichtleitfähige Material aus Polyphenylensulfid. Wie bereits im Zusammenhang mit dem durch den Kohlenstoffanteil halbleitfähig gemachten Elektrodenabschnitt ausgeführt wurde, weist Polyphenylensulfid einen Temperaturausdehnungskoeffizienten auf, der demjenigen vom Gießharz weitestgehend entspricht. Somit sind auch Spannungen zwischen der Halterung und dem Isolierkörper erfindungsgemäß vermieden.Advantageously, the nonconductive material is polyphenylene sulfide. As has already been explained in connection with the electrode portion made semiconductive by the carbon content, polyphenylene sulfide has a coefficient of thermal expansion which largely corresponds to that of the casting resin. Thus, stresses between the holder and the insulating body are inventively avoided.

Abweichend davon weist das nicht leitfähige Material eine Mischung aus Polyphenylensulfid und Glasfasern, auf. Die Glasfasern verstärken die Halterung, so dass eine erhöhte mechanische Festigkeit bereitgestellt ist. Auf diese Weise kann eine Zerstörung oder Verformung der Koppelelektrode zu Beispiel beim Herstellungsverfahren vermieden werden.By contrast, the non-conductive material comprises a mixture of polyphenylene sulfide and glass fibers. The glass fibers reinforce the holder so that increased mechanical strength is provided. In this way, destruction or deformation of the coupling electrode can be avoided for example in the manufacturing process.

Zweckmäßigerweise weist der Elektrodenabschnitt eine aufgerauhte Oberfläche auf. Durch die aufgerauhte Oberfläche wird die Haftung des Elektrodenabschnittes in dem Isolierkörper verbessert. Damit wird eine ablösefreie Verbindung zwischen Elektrodenabschnitt und Isolierkörper gewährleistet und ein Auftreten von Entladungsprozessen verhindert.The electrode section expediently has a roughened surface. The roughened surface improves the adhesion of the electrode section in the insulating body. This is a free transfer between Ensures electrode portion and insulator and prevents occurrence of discharge processes.

Vorteilhafterweise weist die Halterung einen mit dem Elektrodenabschnitt verbundenen Haltering auf.Advantageously, the holder has a retaining ring connected to the electrode section.

Bei einer diesbezüglich zweckmäßigen Weiterentwicklung ist der Haltering mit Abstellfüßen verbunden, deren freies Ende die Abstellmittel ausbilden.In a related expedient development of the retaining ring is connected to Abstellfüßen whose free end form the Abstellmittel.

Das erfindungsgemäße Bauteil verfügt über eine wie zuvor beschriebene Koppelelektrode und ist aufgrund der einfacheren Positionierung der Koppelelektrode einfacher und kostengünstiger herstellbar.The component according to the invention has a coupling electrode as described above and is easier and less expensive to produce due to the simpler positioning of the coupling electrode.

Zweckmäßigerweise ist das Bauteil eine Durchführung, mit deren Hilfe ein Hindurchführen von Leiterschnitten mit Hochspannungspotential durch eine beispielsweise mit Erdpotential beaufschlagte Wandung ermöglicht ist, ohne dass es zu Entladungsprozessen kommt.Expediently, the component is a bushing with the aid of which a passage of conductor sections with a high-voltage potential through a wall subjected to ground potential, for example, is made possible without discharge processes taking place.

Abweichend hiervon ist das Bauteil ein so genannter Stützer, dessen freie Enden einerseits mit Bauteilen auf Hochspannungspotential und andererseits mit Bauteilen auf Erdpotential verbunden sind.Notwithstanding this, the component is a so-called supporter whose free ends are connected on the one hand with components at high voltage potential and on the other hand with components at ground potential.

Vorteilhafterweise ist die Koppelelektrode vollständig in den Isolierkörper eingebettet.Advantageously, the coupling electrode is completely embedded in the insulating body.

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

Figur 1
eine perspektivische Ansicht eines Ausführungsbeispiels der erfindungsgemäßen Koppelelektrode,
Figur 2
eine Querschnittsansicht eines Ausführungsbeispiels des erfindungsgemäßen Bauteils,
Figur 3
eine vergrößerte Darstellung des Bauteils gemäß Figur 2 in einer Querschnittsansicht und
Figur 4
ein weiteres Ausführungsbeispiel des erfindungsgemäßen Bauteils in einer Querschnittsansicht zeigen.
Further expedient embodiments and advantages of the invention are the subject of the following descriptions of embodiments with reference to the figures of the drawing, wherein like reference numerals refer to like-acting components and wherein
FIG. 1
a perspective view of an embodiment of the coupling electrode according to the invention,
FIG. 2
a cross-sectional view of an embodiment of the component according to the invention,
FIG. 3
an enlarged view of the component according to FIG. 2 in a cross-sectional view and
FIG. 4
show a further embodiment of the component according to the invention in a cross-sectional view.

Figur 1 zeigt ein Ausführungsbeispiel der erfindungsgemäßen Koppelelektrode 1 in einer perspektivischen Darstellung. Die Koppelelektrode 1 weist einen ringförmigen Elektrodenabschnitt 2 sowie einen elektrisch mit diesem verbundenen Anschlussstift 3 als Anschlusselement auf, welcher bei dem in Figur 1 gezeigten Beispiel an der unteren Ringseite des Elektrodenabschnittes 2 befestigt ist und von dort aus nach außen ragt. FIG. 1 shows an embodiment of the coupling electrode 1 according to the invention in a perspective view. The coupling electrode 1 has an annular electrode portion 2 and an electrically connected thereto pin 3 as a connecting element, which in the in FIG. 1 shown example is attached to the lower ring side of the electrode portion 2 and protrudes from there to the outside.

Die Koppelelektrode 1 weist weiterhin eine Halterung 4 auf, die an ihrer Befestigungsseite 5 fest mit dem Elektrodenabschnitt 2 verbunden ist. Hierzu weist die Halterung 4 einen mit dem Elektrodenabschnitt verklemmten Haltering 4a auf, an den drei identisch ausgebildete L-förmige Haltefüße 4b angeformt sind. Die längeren Schenkel der L-förmigen Haltefüße 4b der Halterung 4 sind als freie Enden ausgestaltet, so dass Abstellmittel 7 ausgebildet sind. Die drei freien Enden 7 definieren eine plane Abstellfläche, auf der die Koppelelektrode 1 sicher und stabil gelagert werden kann.The coupling electrode 1 also has a holder 4, which is fixedly connected to the electrode section 2 on its fastening side 5. For this purpose, the holder 4 a clamped to the electrode portion retaining ring 4a, are integrally formed on the three identically formed L-shaped support legs 4b. The longer legs of the L-shaped support feet 4b of the holder 4 are designed as free ends, so that parking means 7 are formed. Define the three free ends 7 a flat storage area on which the coupling electrode 1 can be stored safely and stably.

Der Elektrodenabschnitt 2 der Koppelelektrode 1 ist aus einem halbleitenden Kunststoff und in diesem Fall aus Polyphenylensulfid mit einem Kohlenstoffanteil von 30 Gew.% gefertigt. Die elektrisch nicht leitende Halterung 4 ist hingegen aus reinem Polyphenylensulfid hergestellt, das mit Glasfasern mechanisch verstärkt wurde.The electrode section 2 of the coupling electrode 1 is made of a semiconductive plastic and in this case of polyphenylene sulfide with a carbon content of 30 wt.%. The electrically non-conductive support 4, however, is made of pure polyphenylene sulfide, which has been mechanically reinforced with glass fibers.

Figur 2 und 3 zeigt ein Ausführungsbeispiel eines erfindungsgemäßen Bauteils 8 in einer Querschnittsansicht. Das hier gezeigte Bauteil 8 weist einen rotationssymmetrischen Isolierkörper 9 auf, der aus Gießharz besteht. Durch den Isolierkörper 9 erstreckt sich ein Leiterabschnitt 10 hindurch, der an seinen beiden freien Enden mit Befestigungsmitteln 11 und 12 ausgerüstet ist. Durch die Befestigungsmittel 11, 12 ist der Leiterabschnitt mit Hochspannungspotential führenden Leitern verbindbar, so dass im Betriebszustand der Leiterabschnitt 10 selbst auf einem Hochspannungspotential liegt. FIG. 2 and 3 shows an embodiment of a component 8 according to the invention in a cross-sectional view. The component 8 shown here has a rotationally symmetrical insulating body 9, which consists of cast resin. Through the insulating body 9, a conductor section 10 extends through, which is equipped at its two free ends with fastening means 11 and 12. By fastening means 11, 12 of the conductor portion with high-voltage potential leading conductors can be connected, so that in the operating state of the conductor portion 10 itself is at a high voltage potential.

Zur Befestigung des Bauteils 8, bei dem es sich hier um eine Durchführung handelt, in der Durchgangsöffnung eines auf Erdpotential liegenden Gehäuses dient ein Flansch 13, der sich mit seinem freien Ende 14 in den Isolierkörper 9 hinein erstreckt und dort mit einem elastischen Material 15 abgedichtet ist. Zum Messen des Potentials des Leiterabschnittes 10 ist die Koppelelektrode 1 mit ihrem Elektrodenabschnitt 2 konzentrisch um den Leiterabschnitt 10 angeordnet und ebenfalls in dem Isolierkörper 9 eingebettet. Dabei setzt die Halterung 4 mit ihren Abstellmitteln 7 auf dem Flansch 13 auf. Zum Abgriff des Potentials des Elektrodenabschnittes 2 an dem Anschlussstift 3 ist ein mit einer Anschlussleitung 14 verbundener Anschlussstecker 15 vorgesehen, wobei die Anschlussleitung 14 und bis auf sein den Anschlussstift 3 kontaktierendes Einführende auch der Anschlussstecker 15 von einem Isolierstoff flexibel umgeben sind. Der Anschlussstecker 15 ist durch Dichtmittel 16, die aus einem elastischen und nicht leitenden Material, wie beispielsweise Silikon oder Silikonkautschuk, gefertigt sind, gegenüber der Außenumgebung isoliert an dem Isolierkörper 9 gehalten. Durch Eindrücken des Anschlusssteckers 15 in eine in dem Isolierkörper 9 ausgebildete Aussparung 17 wird das Dichtmittel 16 in Rastnuten gepresst, die in der Aussparung 17 ausgebildet sind. Hierbei kommt es zum Verklemmen des Anschlusssteckers 15 in der Aussparung 17 durch die verrasteten Dichtmittel 16, so dass eine stabile und elektrisch dichte Halterung des Anschlusssteckers 15 bereitgestellt.To fasten the component 8, which is a bushing here, in the passage opening of a housing at ground potential, a flange 13 is used, which extends with its free end 14 into the insulating body 9 and sealed there with an elastic material 15 is. For measuring the potential of the conductor section 10, the coupling electrode 1 is arranged with its electrode section 2 concentrically around the conductor section 10 and likewise embedded in the insulating body 9. In this case, the holder 4 with its Abstellmitteln 7 on the flange 13. For tapping off the potential of the electrode section 2 on the connecting pin 3 is a with a connecting line fourteenth connected connector 15 is provided, wherein the connecting line 14 and up to the pin 3 contacting insertion end and the connector 15 are surrounded by an insulating flexible. The connector 15 is held by insulating means 16, which are made of an elastic and non-conductive material, such as silicone or silicone rubber, insulated from the outside environment to the insulating body 9. By pressing the connector 15 in a formed in the insulating body 9 recess 17, the sealing means 16 is pressed into locking grooves which are formed in the recess 17. This results in jamming of the connector 15 in the recess 17 by the latched sealing means 16, so that a stable and electrically sealed mounting of the connector 15 is provided.

Figur 3 zeigt eine vergrößerte Darstellung der Anschlussleitung 14 mit dem Anschlussstecker 15 und den Dichtmitteln 16. In dieser Darstellung ist erkennbar, dass der Elektrodenabschnitt 2 auf einem äußeren Ringabschnitt 4a der Halterung 4 verklemmt ist. Der Anschlussstift 3 ist in dem gezeigten Ausführungsbeispiel nicht einstückig mit dem Elektrodenabschnitt 2 ausgebildet. Vielmehr ist der Anschlussstift 3 in einer Einpressöffnung des Elektrodenabschnittes 2 positioniert und mit diesem verklemmt. Die Dichtmittel 16 sind in dem gezeigten Ausführungsbeispiel als ein einziges elastisches Silikonelement realisiert. FIG. 3 shows an enlarged view of the connecting line 14 with the connector 15 and the sealing means 16. In this illustration, it can be seen that the electrode portion 2 is clamped on an outer ring portion 4a of the holder 4. The connecting pin 3 is not integrally formed with the electrode portion 2 in the embodiment shown. Rather, the terminal pin 3 is positioned in a press-fit opening of the electrode section 2 and clamped with this. The sealing means 16 are realized in the embodiment shown as a single elastic silicone element.

Es kann im Rahmen der Erfindung auch zweckmäßig sein, den Anschlussstecker 15 bereits vor dem Einführen auf den Anschlussstift 3 außen mit einem Schrumpfschlauch zu überziehen. Auf diese Weise wir im Zusammenwirken mit den Dichtmitteln 16 die Dichtigkeit erhöht. Es sei auch darauf hingewiesen, dass die Dichtmittel 16 sich nicht nur innerhalb der Aussparung 17 erstrecken können, sondern sich auch aus dieser heraus geführt sein können.It may also be expedient in the context of the invention to coat the connector 15 outside with a heat-shrinkable tube prior to insertion onto the connecting pin 3. In this way, we increased the tightness in cooperation with the sealing means 16. It should also be noted that the sealing means 16 can not only extend within the recess 17, but can also be guided out of this.

Figur 4 zeigt ein weiteres Ausführungsbeispiel eines Bauteils gemäß der Erfindung, wobei es sich hier um eine so genannte Stützisolierung 18 oder mit anderen Worten um einen Stützer handelt. Die Stützisolierung 18 weist wieder einen Leiterabschnitt 19 auf, der sich jedoch nicht gänzlich durch den Isolierkörper 9 der Stützisolierung 18 hindurch erstreckt, sondern ein freies Ende aufweist, das vollständig in den Isolierkörper 9 eingebettet ist. Der Leiterabschnitt 19 weist wieder Befestigungsmittel 11 zum Befestigen eines nicht gezeigten Leiters mit Hochspannungspotential auf. An dem den Befestigungsmitteln 11 gegenüberliegenden Ende der Stützisolierung 18 bildet diese eine Abstellfläche aus, an der die Stützisolierung 18 an einer auf Erdpotential liegenden Oberfläche befestigbar ist. Ausladende Schirme 20 dienen zur Erhöhung des Kriechweges entlang der Außenoberfläche der Stützisolierung. Weiterhin ist erkennbar, dass in den Isolierkörper 9 die erfindungsgemäße Koppelelektrode 1 eingebettet ist. Das mit dem Elektrodenabschnitt 2 fest und elektrisch leitend verbundene Anschlusselement 3 ist in dem gezeigten Ausführungsbeispiel nicht stiftförmig ausgebildet, sondern in einem 90°-Winkel gebogen, wobei es mit seinem freien Ende in eine Aussparung 21 des Isolierkörpers 9 hineinragt. FIG. 4 shows a further embodiment of a component according to the invention, which is a so-called support insulation 18 or in other words is a supporter. The support insulation 18 again has a conductor portion 19 which, however, does not extend completely through the insulating body 9 of the support insulation 18, but has a free end which is completely embedded in the insulating body 9. The conductor section 19 again has fastening means 11 for fastening a conductor, not shown, with high-voltage potential. At the opposite end of the attachment means 11 of the support insulation 18, this forms a storage area, on which the support insulation 18 can be fastened to a surface lying at ground potential. Extending screens 20 serve to increase the creepage distance along the outer surface of the support insulation. Furthermore, it can be seen that in the insulating body 9, the coupling electrode 1 according to the invention is embedded. In the exemplary embodiment shown, the connection element 3, which is firmly and electrically conductively connected to the electrode section 2, is not pin-shaped, but bent at a 90 ° angle, with its free end projecting into a recess 21 of the insulating body 9.

Das Einführende des Anschlusssteckers 15 ist an die Tiefe der Aussparung 21 angepasst, so dass ein gesicherter Abgriff des Potentials des Elektrodenabschnittes 2 auch bei dieser Ausführungsform des Bauteils 18 ermöglicht ist. Wieder dient ein verrastbares Dichtmittel 16 zur sicheren Befestigung des Anschlusssteckers 15 an dem Isolierkörper 9 sowie zur elektrischen Abdichtung des Anschlusssteckers 15 und zum verhindern des Eintritts von Feuchtigkeit in die Aussparung 21.The insertion end of the connector 15 is adapted to the depth of the recess 21, so that a secured tap of the potential of the electrode portion 2 is made possible also in this embodiment of the component 18. Again, a latchable sealant 16 is used for secure attachment of the connector 15 to the insulating body 9 and the electrical Sealing of the connector 15 and to prevent the entry of moisture into the recess 21st

Claims (14)

  1. Coupling electrode (1) for capacitive voltage tapping within an insulating body (9) of a component (8, 18) which has at least one conductor section (10, 19) which is embedded in the insulating body (9) and to which a high-voltage potential can be applied, having an electrode section (2) which is composed of a semiconductive plastic, and having a connecting element (3) which is electrically connected to the electrode section (2) and is designed such that it can be passed out of the insulating body (9),
    characterized by
    a holder (4) which is composed of a non-conductive material, is connected to the electrode section (2) and has the positioning means (7), which allow isolated mounting of the electrode section (2), and
    in that the holder (4) has a holding ring (4a) which is connected to the electrode section (2).
  2. Coupling electrode (1) according to Claim 1,
    characterized by
    a connecting plug (15) which is connected to a conductor (14) and can be pushed onto the connecting element (3).
  3. Coupling electrode (1) according to Claim 2,
    characterized by
    sealing means (16), which are designed to hold the connecting plug (15) in the insulating body (9).
  4. Coupling electrode (1) according to Claim 3,
    characterized in that
    the sealing means (16) are composed of an elastomer.
  5. Coupling electrode (1) according to Claim 3 or 4, ch
    aracterized in that
    the sealing means (16) can be latched in the insulating body (9, 19).
  6. Coupling electrode (1) according to one of the preceding claims,
    characterized in that
    the semiconductive material contains polyphenylene sulfide and carbon fibres.
  7. Coupling electrode (1) according to Claim 6,
    characterized in that
    the proportion of the carbon fibers is between 15% by weight and 35% by weight of the total weight of the semiconductive material.
  8. Coupling electrode (1) according to one of the preceding claims,
    characterized in that
    the non-conductive material is composed of polyphenylene sulfide.
  9. Coupling electrode (1) according to one of Claims 1 to 7,
    characterized in that
    the non-conductive material contains a mixture of polyphenylene sulfide and glass fibers.
  10. Coupling electrode (1) according to one of the preceding claims,
    characterized in that
    the electrode section (2) has a roughened surface.
  11. Coupling electrode (1) according to Claim 1,
    characterized in that
    the holding ring (4a) is connected to positioning feet (4b) whose free ends form the positioning means (7).
  12. Component (8, 18) having at least one conductor section (10, 19) to which a high-voltage potential can be applied and having an insulating body (9) which is made of insulating material and in which each conductor section (10, 19) is embedded,
    characterized by
    a coupling electrode (1) according to one of the preceding Claims.
  13. Component (8, 18) according to Claim 12,
    characterized in that
    the coupling electrode (1) is completely embedded in the insulating body (9).
  14. Component (8, 18) according to Claim 12 or 13,
    characterized in that
    latching grooves for latching of sealing means are provided in the insulating body (9).
EP05762939.6A 2004-07-16 2005-07-14 Coupling electrode for capacitive voltage tapping within the insulation body of a duct or an insulator Active EP1769513B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004035176.7A DE102004035176B4 (en) 2004-07-16 2004-07-16 Coupling electrode for capacitive voltage tap within an insulating body of a bushing or a supporter and component with a coupling electrode
PCT/EP2005/053380 WO2006008265A1 (en) 2004-07-16 2005-07-14 Coupling electrode for capacitive voltage tapping within the insulation body of a duct or an insulator

Publications (2)

Publication Number Publication Date
EP1769513A1 EP1769513A1 (en) 2007-04-04
EP1769513B1 true EP1769513B1 (en) 2015-08-26

Family

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Application Number Title Priority Date Filing Date
EP05762939.6A Active EP1769513B1 (en) 2004-07-16 2005-07-14 Coupling electrode for capacitive voltage tapping within the insulation body of a duct or an insulator

Country Status (7)

Country Link
US (1) US20080024116A1 (en)
EP (1) EP1769513B1 (en)
CN (1) CN100583314C (en)
DE (1) DE102004035176B4 (en)
ES (1) ES2552336T3 (en)
NO (1) NO337354B1 (en)
WO (1) WO2006008265A1 (en)

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EP3893342A1 (en) 2020-04-09 2021-10-13 Siemens Aktiengesellschaft Cable connection

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DE102018206148B4 (en) * 2018-04-20 2023-05-17 Siemens Aktiengesellschaft Control electrode and bushing for medium-voltage systems and high-voltage systems

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EP0400491A2 (en) 1989-06-01 1990-12-05 Georg Jordan GmbH Power supply arrangement for indicating device for supply voltage indication of medium voltage switch gear
DE9300777U1 (en) 1993-01-21 1994-05-19 Siemens AG, 80333 München Electrical feedthrough with voltage tap

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EP0400491A2 (en) 1989-06-01 1990-12-05 Georg Jordan GmbH Power supply arrangement for indicating device for supply voltage indication of medium voltage switch gear
DE9300777U1 (en) 1993-01-21 1994-05-19 Siemens AG, 80333 München Electrical feedthrough with voltage tap

Cited By (3)

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Publication number Priority date Publication date Assignee Title
EP3893342A1 (en) 2020-04-09 2021-10-13 Siemens Aktiengesellschaft Cable connection
DE102020204620A1 (en) 2020-04-09 2021-10-14 Siemens Aktiengesellschaft Busbar connection
DE102020204620B4 (en) 2020-04-09 2023-07-27 Siemens Aktiengesellschaft cable connection

Also Published As

Publication number Publication date
CN100583314C (en) 2010-01-20
CN1985336A (en) 2007-06-20
DE102004035176B4 (en) 2014-09-25
WO2006008265A1 (en) 2006-01-26
ES2552336T3 (en) 2015-11-27
US20080024116A1 (en) 2008-01-31
NO20070844L (en) 2007-04-16
EP1769513A1 (en) 2007-04-04
DE102004035176A1 (en) 2006-02-16
NO337354B1 (en) 2016-03-21

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