EP0041917B2 - Inductive-voltage transformer for a fully insulated, metal-enclosed high-voltage switchgear - Google Patents

Inductive-voltage transformer for a fully insulated, metal-enclosed high-voltage switchgear Download PDF

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Publication number
EP0041917B2
EP0041917B2 EP81730049A EP81730049A EP0041917B2 EP 0041917 B2 EP0041917 B2 EP 0041917B2 EP 81730049 A EP81730049 A EP 81730049A EP 81730049 A EP81730049 A EP 81730049A EP 0041917 B2 EP0041917 B2 EP 0041917B2
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EP
European Patent Office
Prior art keywords
high voltage
metal
voltage transformer
supply line
voltage
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Expired
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EP81730049A
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German (de)
French (fr)
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EP0041917B1 (en
EP0041917A2 (en
EP0041917A3 (en
Inventor
Jürgen Dr.-Ing. Moeller
Manfred Dr.-Ing. Weniger
Werner Keil
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Siemens AG
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Siemens AG
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Priority to AT81730049T priority Critical patent/ATE12437T1/en
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Publication of EP0041917A3 publication Critical patent/EP0041917A3/en
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Publication of EP0041917B1 publication Critical patent/EP0041917B1/en
Publication of EP0041917B2 publication Critical patent/EP0041917B2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/24—Voltage transformers
    • H01F38/26—Constructions

Definitions

  • the invention is based on an inductive voltage converter for a fully insulated, metal-encapsulated high-voltage switchgear assembly with a boiler that can be flanged onto the metal capsule of the switchgear assembly, in which the active system of the voltage converter is located with a high-voltage electrode coaxially surrounding the high-voltage winding and in which a high-voltage supply line ends, in which the Cable train between high-voltage supply line and high-voltage winding, a resistance device connected to the high-voltage electrode is switched on.
  • the high-voltage winding of the active system is encompassed by an annular high-voltage electrode, which is held on the high-voltage winding by means of support elements.
  • the support means contain a guide plate as well as lock parts, guide strips, threaded bushes and grub screws and can consist of resistance material in order to simultaneously serve to dampen discharge currents of empty lines.
  • a high-voltage lead is mechanically and electrically connected at one end by means of connection angles; the other end of the high-voltage supply line is fastened in a terminating insulator of the boiler.
  • inductive voltage transformers connected to cables can be subjected to such a large current on the primary side during discharge processes that not only thermal but also mechanical overloading of the voltage transformer occurs; the mechanical overload can become so great that the entire inductive voltage converter is permanently damaged. Will one in the cauldron .
  • - Inductive voltage converter for fully insulated, metal-encapsulated high-voltage circuits housed a resistance device that is switched on in the cable between the high-voltage supply line and the high-voltage winding, then the current through the primary winding of the voltage converter is reduced and thus mechanical overload is avoided.
  • the invention has for its object to design an inductive voltage converter for a fully insulated, metal-encapsulated high-voltage switchgear with a resistance device in the cable between the high-voltage supply line and the high-voltage winding so that the resistance device is not only inexpensive and mechanically very strong, but also because of the low height in the boiler is easy to install even without an extension.
  • the resistance device extends from the high-voltage supply line to the high-voltage electrode and consists of a -saltic structure of several mass resistance elements, whereby between two adjacent mass resistance elements there is a round metal disk, which is provided with an injection of the same height from each side and which Press-fit operations are cyclically offset in successive metal disks in the circumferential direction in such a way that a helical arrangement of the mass resistance elements is created; the metal disks and the mass resistance elements are held together by means of pressure plates located at the ends of the columnar structure, of which one pressure plate is fastened to the high-voltage feed line and the other pressure plate has a recess into which a plug device of the high-voltage electrode engages.
  • the voltage converter according to the invention By accommodating the resistance device in such a way that it extends from the high-voltage feed line to the high-voltage electrode, it is achieved in the voltage converter according to the invention that the boiler of the voltage converter does not need to be enlarged because of the resistance device, because usually between the high-voltage electrode and the end of the boiler facing the switchgear is sufficient. There is space to accommodate the resistance device.
  • the voltage converter according to the invention because of the columnar structure of its resistance device, the voltage converter according to the invention is of low-voltage design and mechanically very strong. A relatively low overall height can also be achieved with the columnar resistance device, which is particularly advantageous in view of the limited space in the boiler of an inductive voltage converter.
  • a voltage converter is known from DE-C-655 694, in which a slack resistance cord is provided between the high-voltage feed line and the high-voltage winding.
  • This converter is designed as a high-voltage outdoor voltage converter.
  • Arrangements are also known from FR-A-1 318 052, DE-C-1 015 909 and DE-C-652 205, in which disk-shaped resistance elements and metal plates have a columnar shape Form the structure, however, these are surge arresters, in which the individual resistance elements do not represent ohmic resistors, but have a behavior of their resistance values that is dependent on the level of the surge voltage.
  • the one pressure plate advantageously carries a threaded pin which is received by a threaded bore in the high-voltage supply line.
  • the recess in the other pressure plate is cylindrical and widens in a funnel shape towards the high-voltage electrode.
  • the metal disks have at least one further press-in for receiving an insulating spacer element on each side and diametrically opposite the press-in.
  • two further press-ins are provided, as a result of which the individual metal disks press against one another when pressure is exerted on the pressure plates, forming a straight columnar structure.
  • the metal disks furthermore advantageously have three through holes offset by 120 ° from one another, through which clamping bolts made of insulating material are guided; the clamping bolts clamp the pressure plates together. In this way, a mechanically fixed configuration of the resistance device is achieved.
  • the clamping bolts made of insulating material are advantageously held in one pressure plate by pins which engage in transverse bores of the clamping bolts.
  • the clamping bolts advantageously carry threaded bushes onto which nuts are screwed for bracing.
  • the metal disks are advantageously provided with a circumferential bead on the edge.
  • the active system 2 of the inductive voltage converter is accommodated in a boiler 1 shown only partially in FIG. 1.
  • a boiler 1 shown only partially in FIG. 1.
  • FIG. 1 Of the active system 2, only part of an iron core 3 and a high-voltage electrode 4 are shown in FIG. 1, which includes an unrecognizable high-voltage winding on the outside.
  • a plug device 5 is attached to the outside of the high-voltage electrode 4, which creates an electrical connection to a resistance device 6.
  • the resistance device 6 contains a pressure plate 7 at its upper end in FIG. 1 and a further pressure plate 8 at its lower end in FIG. 1. Between the pressure plates 7 and 8 there are a plurality of round metal disks 9, between each of which a mass resistance element 10 is housed.
  • the resistance device 6 is held together by three clamping bolts 11 made of insulating material, which are guided through through holes 12, 13 and 14 of the metal disks 9, which are each offset by 120 ° (cf. also FIGS. 2 and 3).
  • each of the clamping bolts 11 is guided in through holes 15 in one pressure plate 7 and held there by pins 16 which are guided through transverse bores 17.
  • the clamping bolts 11 are each provided with a threaded bushing 18 (see FIG. 3).
  • the threaded bushings 18 can be glued to the clamping bolts.
  • a nut 20 is screwed onto the threaded bushings 18 and, as a result, a clamping force is exerted on the pressure plates 7 and 8 and thus also on the metal disks 9 and the mass resistance elements. This creates a resistance device 6 with a relatively high mechanical strength.
  • the other pressure plate 8 has a recess 21 which is cylindrical and extends in a funnel shape towards the high-voltage electrode 4. This simplifies the insertion of the plug device 5 into the recess 21 when the inductive voltage converter is being installed.
  • the one pressure plate 7 is provided with a threaded pin 22 which is received by a threaded bore 23 of a high-voltage supply line 24.
  • the threaded pin 22 thus provides a secure mechanical and galvanic connection of the resistance device 6 to the high-voltage supply line 24.
  • the high-voltage supply line 24 in turn is embedded in an insulator 25, which is held on an end plate 28 by means of a pressure ring 26 with a sealing ring 27 interposed therebetween.
  • This end plate 28 is screwed to a flange 30 of the boiler 1 with the interposition of a further sealing ring 29.
  • each individual metal disc 9 has an indentation 31 and 32 on its different sides. These press-in are offset by 120 ° on the metal disc 9 and are each designed such that they are each once concave and convex when viewed from one side. Diametrically opposite the press-in 31 and 32 there are two further press-in 33 and 34, which serve to receive cylindrical spacing elements, not shown, made of insulating material. These are spacers designed in accordance with the height of the mass resistance elements in their length and ensure that when the resistance device 6 is compressed, the individual metal disks 9 lie parallel to one another and do not tilt.
  • the individual metal disks 9 are each stacked on top of one another such that successive metal disks are cyclically offset in the lateral direction in such a way that a helical arrangement of the mass of resistance elements 10 is formed.
  • a concave pressing in of a disk is opposed to a convex pressing in of the next following disk, as a result of which the individual mass resistance elements are held securely.
  • a mechanically very stable resistance device with a relatively low overall height is achieved.
  • the voltage converter described also maintains its mechanical structure in the event of large currents threatening in the event of abnormal operating conditions, this property being achieved without lasting structural changes.

Abstract

1. An inductive voltage transformer for a fully insulated, metal-encased high voltage switch-gear comprising a vessel (1) which can be flangedly attached to the metal casing of the switch-gear, and in which the active system (2) of the voltage transformer is located, and a high voltage supply line (24) terminates, characterized in that within the vessel (1), there is arranged a resistance arrangement (6) which extens from the high voltage supply line (24) to the active system ; that the resistance arrangement (6) consists of a column-shaped structure formed of a plurality of composite resistance elements (10) which are held together by means of pressure plates (7, 8) arranged at the ends of the column-shaped structure, one of which pressure plates (7) is attached to the high voltage supply line (24) and the other of which pressure plates (8) is connected to the active system (2).

Description

Die Erfindung geht von einem induktiven Spannungswandler für eine vollisolierte, metallgekapseite Hochspannungsschaltanlage mit einem an die Metallkapsel der Schaltanlage anflanschbaren Kessel aus, in dem sich das aktive System des Spannungswandlers mit einer die Hochspannungswicklung koaxial umgebenden Hochspannungselektrode befindet und in dem eine Hochspannungszuleitung endet, wobei in den Leitungszug zwischen Hochspannungszuleitung und Hochspannungswicklung eine mit der Hochspannungselektrode verbundene Widerstandseinrichtung eingeschaltet ist.The invention is based on an inductive voltage converter for a fully insulated, metal-encapsulated high-voltage switchgear assembly with a boiler that can be flanged onto the metal capsule of the switchgear assembly, in which the active system of the voltage converter is located with a high-voltage electrode coaxially surrounding the high-voltage winding and in which a high-voltage supply line ends, in which the Cable train between high-voltage supply line and high-voltage winding, a resistance device connected to the high-voltage electrode is switched on.

Bei einem bekannten induktiven Spannungswandler dieser Art (DE-B-2 452 056) ist die Hochspannungswicklung des aktiven Systems von einer ringförmigen Hochspannungselektrode umfaßt, die mittels Stützelementen an der Hochspannungswicklung gehalten ist. Die Stützmittel enthalten ein Führungsblech sowie Schloßteile, Führungsstreifen, Gewindebuchsen und Gewindestifte und können aus Widerstandsmaterial bestehen, um gleichzeitig zur Dämpfung von Entladeströmen leer laufender Leitungen zu dienen. Mit der Hochspannungselektrode ist mittels Anschlußwinkeln eine Hochspannungszuleitung mit ihrem einen Ende mechanisch und elektrisch verbunden ; mit ihrem anderen Ende ist die Hochspannungszuleitung in einem Abschlußisolator des Kessels befestigt.In a known inductive voltage converter of this type (DE-B-2 452 056), the high-voltage winding of the active system is encompassed by an annular high-voltage electrode, which is held on the high-voltage winding by means of support elements. The support means contain a guide plate as well as lock parts, guide strips, threaded bushes and grub screws and can consist of resistance material in order to simultaneously serve to dampen discharge currents of empty lines. With the high-voltage electrode, a high-voltage lead is mechanically and electrically connected at one end by means of connection angles; the other end of the high-voltage supply line is fastened in a terminating insulator of the boiler.

insbesondere an Kabel angeschlossene, induktive Spannungswandler können bei Entladungsvorgängen primärseitig mit einem derart großen Strom beaufschlagt werden, daß nicht nur thermische, sondern auch mechanische Überlastung des Spannungswandlers eintritt; die mechanische Überlastung kann dabei so groß werden, daß der gesamte induktive Spannungswandler nachhaltig beschädigt wird. Wird im Kessel eines . - induktiven Spännungswandlers für vollisolierte, metallgekapselte Hochspannungsschaltungen eine Widerstandseinrichtung untergebracht, die in dem Leitungszug zwischen Hochspannungszuleitung und Hochspannungswicklung eingeschaltet ist, dann wird dadurch der Strom durch die Primärwicklung des Spannungswandlers verringert und damit auch eine mechanische Überlastung vermieden.In particular, inductive voltage transformers connected to cables can be subjected to such a large current on the primary side during discharge processes that not only thermal but also mechanical overloading of the voltage transformer occurs; the mechanical overload can become so great that the entire inductive voltage converter is permanently damaged. Will one in the cauldron . - Inductive voltage converter for fully insulated, metal-encapsulated high-voltage circuits housed a resistance device that is switched on in the cable between the high-voltage supply line and the high-voltage winding, then the current through the primary winding of the voltage converter is reduced and thus mechanical overload is avoided.

Der Erfindung liegt die Aufgabe zugrunde, einen induktiven Spannungswandler für eine vollisolierte, metallgekapselte Hochspannungsschaltanlage mit einer Widerstandseinrichtung im Leitungszug zwischen Hochspannungszuleitung und Hochspannungswicklung so zu gestalten, daß die Widerstandseinrichtung nicht nur hochspannungstechnisch günstig und mechanisch sehr fest ausgeführt ist, sondern aufgrund geringer Bauhöhe in dem Kessel auch ohne Erweiterung desselben einfach montierbar ist.The invention has for its object to design an inductive voltage converter for a fully insulated, metal-encapsulated high-voltage switchgear with a resistance device in the cable between the high-voltage supply line and the high-voltage winding so that the resistance device is not only inexpensive and mechanically very strong, but also because of the low height in the boiler is easy to install even without an extension.

Zur Lösung dieser Aufgabe erstreckt sich die Widerstandseinrichtung von der Hochspannungszuleitung bis zur Hochspannungselektrode und besteht aus einem-sältienförmigen Aufbau mehrerer Massewiderstandselemente, wobei zwischen zwei benachbarten Massewiderstandselementen jeweils eine runde Metallscheibe liegt, die von jeder Seite her mit je einer Einpressung gleicher Höhe versehen ist und die Einpressungen sind in aufeinanderfolgenden Metallscheiben in Umfangsrichtung zyklisch derart versetzt, daß eine wendelförmige Anordnung der Massewiderstandselemente entsteht ; die Metallscheiben und die Massewiderstandselemente sind mittels an den Enden des säulenförmigen Aufbaus befindlicher Druckplatten zusammengehalten sind, von denen die eine Druckplatte an der Hochspannungszuleitung befestigt ist und die andere Druckplatte eine Ausnehmung aufweist, in die eine Steckereinrichtung der Hochspannungselektrode eingreift.To solve this problem, the resistance device extends from the high-voltage supply line to the high-voltage electrode and consists of a -saltic structure of several mass resistance elements, whereby between two adjacent mass resistance elements there is a round metal disk, which is provided with an injection of the same height from each side and which Press-fit operations are cyclically offset in successive metal disks in the circumferential direction in such a way that a helical arrangement of the mass resistance elements is created; the metal disks and the mass resistance elements are held together by means of pressure plates located at the ends of the columnar structure, of which one pressure plate is fastened to the high-voltage feed line and the other pressure plate has a recess into which a plug device of the high-voltage electrode engages.

Durch die Unterbringung der Widerstandseinrichtung in der Weise, daß sie sich von der Hochspannungszuleitung bis zur Hochspannungselektrode erstreckt, ist bei dem erfindungsgemäßen Spannungswandler erreicht, daß der Kessel des Spannungswandlers wegen der Widerstandseinrichtung nicht vergrößert zu werden braucht, weil in der Regel zwischen der Hochspannungselektrode und dem der Schaltanlage zugewandten Ende des Kessels ausreichend. Raum zur Unterbringung der Widerstandseinrichtung vorhanden ist. Darüber hinaus ist der erfindungsgemäße Spannungswandler wegen des säulenförmigen Aufbaus seiner Widerstandseinrichtung hochspannungstechnisch günstig und mechanisch sehr fest ausgeführt. Mit der säulenförmig aufgebauten Widerstandseinrichtung ist auch eine relativ geringe Bauhöhe erzielbar, was im Hinblick auf die beengten Platzverhältnisse im Kessel eines induktiven Spannungswandlers besonders vorteilhaft ist. Bei der Montage des erfindungsgemäßen Spannungswandlers muß an der Stelle zwischen der Widerstandseinrichtung und der Hochspannungselektrode lediglich eine Steckverbindung hergestellt werden.By accommodating the resistance device in such a way that it extends from the high-voltage feed line to the high-voltage electrode, it is achieved in the voltage converter according to the invention that the boiler of the voltage converter does not need to be enlarged because of the resistance device, because usually between the high-voltage electrode and the end of the boiler facing the switchgear is sufficient. There is space to accommodate the resistance device. In addition, because of the columnar structure of its resistance device, the voltage converter according to the invention is of low-voltage design and mechanically very strong. A relatively low overall height can also be achieved with the columnar resistance device, which is particularly advantageous in view of the limited space in the boiler of an inductive voltage converter. When installing the voltage converter according to the invention, only a plug connection has to be made at the point between the resistance device and the high-voltage electrode.

Aus der DE-B-1 077 319 ist es bekannt, in Reihe mit der Primärwicklung von induktiven Spannungswandlern Dämpfungswiderstände anzuordnen, jedoch bezieht sich diese Druckschrift vor allem auf die schaltungsmäßige Anordnung solcher Widerstände ; detaillierte Angaben über eine vorteilhafte räumliche Anordnung und Ausführung eines solchen Dämpfungswiderstandes bei induktiven Spannungswandlern für vollisolierte, metallgekapselte Hochspannungsschaltanlagen finden sich in dieser Druckschrift nicht.From DE-B-1 077 319 it is known to arrange damping resistors in series with the primary winding of inductive voltage converters, but this document relates primarily to the circuit arrangement of such resistors; There is no detailed information on an advantageous spatial arrangement and design of such a damping resistor in inductive voltage converters for fully insulated, metal-encapsulated high-voltage switchgear.

Außerdem ist aus der DE-C-655 694 ein Spannungswandler bekannt, bei dem zwischen der Hochspannungszuleitung und der Hochspannungswicklung eine schlaffe Widerstandskordel vorgesehen ist. Dieser Wandler ist als Freiluft-Spannungswandler großer Bauhöhe ausgeführt.In addition, a voltage converter is known from DE-C-655 694, in which a slack resistance cord is provided between the high-voltage feed line and the high-voltage winding. This converter is designed as a high-voltage outdoor voltage converter.

Ferner sind aus der FR-A-1 318 052, der DE-C-1 015 909 und der DE-C-652 205 Anordnungen bekannt, bei denen scheibenförmige Widerstandselemente und Metallplatten einen säulenförmigen Aufbau bilden, jedoch handelt es sich hierbei um Überspannurigsableiter, bei denen die einzelnen Widerstandselemente nicht ohmsche Widerstände darstellen, sondern ein von der Höhe der Überspannung abhängiges Verhalten ihrer Widerstandswerte aufweisen.Arrangements are also known from FR-A-1 318 052, DE-C-1 015 909 and DE-C-652 205, in which disk-shaped resistance elements and metal plates have a columnar shape Form the structure, however, these are surge arresters, in which the individual resistance elements do not represent ohmic resistors, but have a behavior of their resistance values that is dependent on the level of the surge voltage.

Um bei dem erfindungsgemäßen Wandler eine feste mechanische Verbindung der Widerstandseinrichtung mit der Hochspannungszuleitung zu erreichen, trägt die eine Druckplatte vorteilhafterweise einen Gewindezapfen, der von einer Gewindebohrung in der Hochspannungszuleitung aufgenommen ist.In order to achieve a firm mechanical connection of the resistance device to the high-voltage supply line in the converter according to the invention, the one pressure plate advantageously carries a threaded pin which is received by a threaded bore in the high-voltage supply line.

Um einerseits eine sicher wirkende Steckverbindung zu erreichen und um andererseits die Steckverbindung ohne Schwierigkeiten zustande bringen zu können, ist die Ausnehmung in der anderen Druckplatte zylindrisch und erweitert sich zur Hochspannungselektrode hin trichterförmig.In order on the one hand to achieve a securely acting plug connection and on the other hand to be able to bring the plug connection into effect without difficulty, the recess in the other pressure plate is cylindrical and widens in a funnel shape towards the high-voltage electrode.

Bei der Widerstandseinrichtung weisen die Metallscheiben auf jeder Seite und den Einpressungen diametral gegenüberliegend mindestens eine weitere Einpressung zur Aufnahme eines isolierenden Abstandselementes auf. Vorteilhafterweise sind zwei weitere Einpressungen vorgesehen, wodurch erreicht ist, daß sich die einzelnen Metallscheiben bei Druckausübung auf die Druckplatten unter Ausbildung eines geraden säulenförmigen Aufbaus gegeneinander pressen.In the resistance device, the metal disks have at least one further press-in for receiving an insulating spacer element on each side and diametrically opposite the press-in. Advantageously, two further press-ins are provided, as a result of which the individual metal disks press against one another when pressure is exerted on the pressure plates, forming a straight columnar structure.

Die Metallscheiben weisen ferner vorteilhafterweise drei um 120° gegeneinander versetzte Durchgangslöcher auf, durch die Spannbolzen aus Isolierwerkstoff geführt sind ; die Spannbolzen verspannen die Druckplatten miteinander. Auf diese Weise ist eine mechanisch feste Ausgestaltung der Widerstandseinrichtung erreicht.The metal disks furthermore advantageously have three through holes offset by 120 ° from one another, through which clamping bolts made of insulating material are guided; the clamping bolts clamp the pressure plates together. In this way, a mechanically fixed configuration of the resistance device is achieved.

Die Spannbolzen aus Isolierwerkstoff sind in der einen Druckplatte vorteilhafterweise durch Stifte gehalten, die in Querbohrungen der Spannbolzen eingreifen. Im Bereich der anderen Druckplatte tragen die Spannbolzen vorteilhafterweise Gewindebuchsen, auf die zur Verspannung Muttern aufgeschraubt sind.The clamping bolts made of insulating material are advantageously held in one pressure plate by pins which engage in transverse bores of the clamping bolts. In the area of the other pressure plate, the clamping bolts advantageously carry threaded bushes onto which nuts are screwed for bracing.

Um einen hochspannungstechnisch günstigen Aufbau der Widerstandseinrichtung zu erreichen, sind die Metallscheiben am Rande vorteilhafterweise mit einem umlaufenden Wulst versehen.In order to achieve a high-voltage construction of the resistance device, the metal disks are advantageously provided with a circumferential bead on the edge.

Zur Erläuterung der Erfindung ist in

  • Fig. 1 ein Ausführungsbeispiel des erfindungsgemäßen induktiven Spannungswandlers mit seinen im Zusammenhang mit der Erfindung wesentlichen Teilen in
  • Fig. 2 ein Schnitt durch die eine Druckplatte der Widerstandseinrichtung, in
  • Fig. 3 ein Schnitt durch die andere Druckplatte der Widerstandseinrichtung, in
  • Fig. 4 eine Draufsicht auf eine Metallscheibe der Widerstandseinrichtung, und in
  • Fig. 5 ein Schnitt durch die Metallscheibe wiedergegeben.
To explain the invention is in
  • Fig. 1 shows an embodiment of the inductive voltage converter according to the invention with its essential parts in connection with the invention in
  • Fig. 2 shows a section through the one pressure plate of the resistance device, in
  • Fig. 3 shows a section through the other pressure plate of the resistance device, in
  • Fig. 4 is a plan view of a metal disc of the resistance device, and in
  • Fig. 5 shows a section through the metal disc.

In einem in der Fig. 1 nur teilweise dargestellten Kessel 1 ist das aktive System 2 des induktiven Spannungswandlers untergebracht. Von dem aktiven System 2 ist in der Fig. 1 nur ein Teil eines Eisenkernes 3 und eine Hochspannungselektrode 4 dargestellt, die eine nicht erkennbare Hochspannungswicklung außen umfaßt. An der Hochspannungselektrode 4 ist außen eine Steckereinrichtung 5 angebracht, die eine elektrische Verbindung zu einer Widerstandseinrichtung 6 schafft.The active system 2 of the inductive voltage converter is accommodated in a boiler 1 shown only partially in FIG. 1. Of the active system 2, only part of an iron core 3 and a high-voltage electrode 4 are shown in FIG. 1, which includes an unrecognizable high-voltage winding on the outside. A plug device 5 is attached to the outside of the high-voltage electrode 4, which creates an electrical connection to a resistance device 6.

Die Widerstandseinrichtung 6 enthält an ihrem in der Fig. 1 oberen Ende eine Druckplatte 7 und an ihrem in der Fig. 1 unteren Ende eine weitere Druckplatte 8. Zwischen den Druckplatten 7 und 8 befinden sich mehrere runde Metallscheiben 9, zwischen denen jeweils ein Massewiderstandselement 10 untergebracht ist. Die Widerstandseinrichtung 6 wird durch drei Spannbolzen 11 aus Isolierwerkstoff zusammengehalten, die durch jeweils um 120° gegeneinander versetzte Durchgangslöcher 12, 13 und 14 der Metallscheiben 9 (vgl. auch die Fig. 2 und 3) geführt sind.The resistance device 6 contains a pressure plate 7 at its upper end in FIG. 1 and a further pressure plate 8 at its lower end in FIG. 1. Between the pressure plates 7 and 8 there are a plurality of round metal disks 9, between each of which a mass resistance element 10 is housed. The resistance device 6 is held together by three clamping bolts 11 made of insulating material, which are guided through through holes 12, 13 and 14 of the metal disks 9, which are each offset by 120 ° (cf. also FIGS. 2 and 3).

Wie aus Fig. 2 hervorgeht, ist jeder der Spannbolzen 11 in Durchgangslöchern 15 in der einen Druckplatte 7 geführt und dort durch Stifte 16 gehalten, die durch Querbohrungen 17 geführt sind. Im Bereich der anderen Druckplatte 8 sind die Spannbolzen 11 mit jeweils einer Gewindebuchse 18 (vgl. Fig. 3) versehen. Die Gewindebuchsen 18 können auf die Spannbolzen aufgeklebt sein. Unter Zwischenlage von Tellerfedern 19 wird auf die Gewindebuchsen 18 eine Mutter 20 geschraubt und dadurch eine Spannkraft auf die Druckplatten 7 und 8 und damit auch auf die Metallscheiben 9 und die Massewiderstandselemente ausgeübt. Es entsteht somit eine Widerstandseinrichtung 6 mit einer relativ großen mechanischen Festigkeit.As can be seen from FIG. 2, each of the clamping bolts 11 is guided in through holes 15 in one pressure plate 7 and held there by pins 16 which are guided through transverse bores 17. In the area of the other pressure plate 8, the clamping bolts 11 are each provided with a threaded bushing 18 (see FIG. 3). The threaded bushings 18 can be glued to the clamping bolts. With the interposition of disc springs 19, a nut 20 is screwed onto the threaded bushings 18 and, as a result, a clamping force is exerted on the pressure plates 7 and 8 and thus also on the metal disks 9 and the mass resistance elements. This creates a resistance device 6 with a relatively high mechanical strength.

Aus Fig. 3 ist ferner entnehmbar, daß die andere Druckplatte 8 eine Ausnehmung 21 aufweist, die zylindrisch verläuft und sich zur Hochspannungselektrode 4 hin trichterförmig erweitert. Dadurch ist das Einführen der Steckereinrichtung 5 in die Ausnehmung 21 bei der Montage des induktiven Spannungswandlers erleichtert.From Fig. 3 it can also be seen that the other pressure plate 8 has a recess 21 which is cylindrical and extends in a funnel shape towards the high-voltage electrode 4. This simplifies the insertion of the plug device 5 into the recess 21 when the inductive voltage converter is being installed.

Wie aus Fig. 2 hervorgeht, ist die eine Druckplatte 7 mit einem Gewindezapfen 22 versehen, der von einer Gewindebohrung 23 einer Hochspannungszuleitung 24 aufgenommen ist. Über den Gewindezapfen 22 erfolgt somit eine sichere mechanische und galvanische Verbindung der Widerstandseinrichtung 6 mit der Hochspannungszuleitung 24. Die Hochspannungszuleitung 24 ihrerseits ist in einem Isolator 25 eingebettet, der mittels eines Druckringes 26 unter Zwischenlage eines Dichtringes 27 an einer Abschlußplatte 28 gehalten ist. Diese Abschlußplatte 28 ist unter Zwischenlage eines weiteren Dichtungsringes 29 mit einem Flansch 30 des Kessels 1 verschraubt.As is apparent from FIG. 2, the one pressure plate 7 is provided with a threaded pin 22 which is received by a threaded bore 23 of a high-voltage supply line 24. The threaded pin 22 thus provides a secure mechanical and galvanic connection of the resistance device 6 to the high-voltage supply line 24. The high-voltage supply line 24 in turn is embedded in an insulator 25, which is held on an end plate 28 by means of a pressure ring 26 with a sealing ring 27 interposed therebetween. This end plate 28 is screwed to a flange 30 of the boiler 1 with the interposition of a further sealing ring 29.

Wie die Fig. 4 und 5 im einzelnen zeigen, weist jede einzelne Metallscheibe 9 auf ihren verschiedenen Seiten jeweils eine Einpressung 31 bzw. 32 auf. Diese Einpressungen sind um 120° versetzt auf der Metallscheibe 9 angebracht und sind jeweils so ausgebildet, daß sie von einer Seite aus betrachtet jeweils einmal konkav und einmal konvex gestaltet sind. Diametral den Einpressungen 31 und 32 gegenüber sind jeweils zwei weitere Einpressungen 33 und 34 vorhanden, die zur Aufnahme von nicht dargestellten zylindrischen Abstandselementen aus lsolierwerkstoff dienen. Diese Abstandselemente sind entsprechend der Höhe der Massewiderstandselemente in ihrer Länge ausgebildet und sorgen dafür, daß bei einem Zusammendrücken der Widerstandseinrichtung 6 die einzelnen Metallscheiben 9 parallel zueinander liegen und nicht verkanten.As shown in FIGS. 4 and 5 in detail, each individual metal disc 9 has an indentation 31 and 32 on its different sides. These press-in are offset by 120 ° on the metal disc 9 and are each designed such that they are each once concave and convex when viewed from one side. Diametrically opposite the press-in 31 and 32 there are two further press-in 33 and 34, which serve to receive cylindrical spacing elements, not shown, made of insulating material. These are spacers designed in accordance with the height of the mass resistance elements in their length and ensure that when the resistance device 6 is compressed, the individual metal disks 9 lie parallel to one another and do not tilt.

Bei der Bildung der Widerstandseinrichtung 6 werden die einzelnen Metallscheiben 9 jeweils so aufeinandergeschichtet, daß aufeinanderfolgende Metallscheiben in seitlicher Richtung zyklisch derart versetzt sind, daß eine wendelförmige Anordnung der Masse Widerstandselemente 10 gebildet ist. Bei dieser Anordnung steht jeweils einer konkaven Einpressung einer Scheibe eine konvexe Einpressung der nächstfolgenden Scheibe gegenüber, wodurch die einzelnen Massewiderstandselemente sicher gehalten sind. Vor allem jedoch ist eine mechanisch sehr stabile Widerstandseinrichtung mit verhältnismäßig geringer Bauhöhe erreicht.When the resistance device 6 is formed, the individual metal disks 9 are each stacked on top of one another such that successive metal disks are cyclically offset in the lateral direction in such a way that a helical arrangement of the mass of resistance elements 10 is formed. In this arrangement, a concave pressing in of a disk is opposed to a convex pressing in of the next following disk, as a result of which the individual mass resistance elements are held securely. Above all, however, a mechanically very stable resistance device with a relatively low overall height is achieved.

Der beschriebene Spannungswandler behält auch bei im Falle anormaler Betriebszustände drohenden großen Strömen seinen mechanischen Aufbau bei, wobei diese Eigenschaft ohne nachhaltige konstruktive Änderungen erreicht ist.The voltage converter described also maintains its mechanical structure in the event of large currents threatening in the event of abnormal operating conditions, this property being achieved without lasting structural changes.

Claims (8)

1. Inductive voltage transformer for a fully insu- . fated metal-clad high voltage switchgear, having a tank (1) which can be bolted on to the metal casing of the switchgear, in which tank the active system (2) of the voltage transformer, which has a high voltage electrode '(4) coaxially surrounding the high voltage winding, is located and in which a high voltage supply line (24) terminates, wherein a resistor device (6) connected with the high voltage electrode (4) is inserted into the cable run between the high voltage supply line (24) and high voltage winding, characterised in that the resistor device (6) extends from the high voltage supply line (24) to the high voltage electrode (4) and comprises a columnar structure of several composition resistor elements (10), wherein a round metal disc (9) is located between each pair of adjacent composition resistor elements (10) and is provided on both sides with respective indentations (31, 32) of the same height, in that the indentations (31, 32) in consecutive metal discs (9) are offset cyclically in the direction of the periphery in such a way that a helical arrangement of the composition resistor elements (10) is formed, and in that the metal discs (9) and the composition resistor elements (10) are held together by means of pressure - plates (7, 8) located at the ends of the columnar structure, one pressure plate (7) of which is fixed to the high voltage supply line (24) and the other pressure plate (8) of which has a recess (21) into which a plug arrangement (5) of the high voltage electrode is engaged.
2. Voltage transformer according to claim 1, characterised in that one pressure plate (7) carries a threaded stem (22) which is received by a threaded hole (23) in the high voltage supply line (24).
3. Voltage transformer according to claim 1 or 2, characterised in that the recess'(21) is cylindrical and widens in a funnel shape towards the high voltage electrode.
4. Voltage transformer according to one of the previous claims, characterised in that the metal discs (9) have at least one further indentation (33, 34), located on each side and diametrically opposite indentations (31, 32), for receiving an insulating spacing element.
5. Voltage transformer according to one of the previous claims, characterised in that the metal discs (9) have three through holes (12, 13, 14) offset relative to one another by 120°, through which the clamp bolts (11), which comprise an insulating material and brace the pressure plates (7, 8) together, are guided.
6. Voltage transformer according to claim 5, characterised in that the clamp bolts (11) are held in one pressure plate (7) by pins (16), which engage themselves in lateral drill holes (17) of the clamp bolts (11).
7. Voltage transformer according to claim 5 or 6, characterised in that the clamp bolts (11) bear threaded bushes (18) in the region of the other pressure plate (8), nuts (20) being screwed on to the clamp bolts for the purposes of bracing.
8. Voltage transformer according to one of the previous claims, characterised in that the metal discs (9) are provided on their edge with an encircling rim.
EP81730049A 1980-05-30 1981-05-14 Inductive-voltage transformer for a fully insulated, metal-enclosed high-voltage switchgear Expired EP0041917B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81730049T ATE12437T1 (en) 1980-05-30 1981-05-14 INDUCTIVE VOLTAGE TRANSFORMER FOR A FULLY INSULATED, METAL ENCLOSED HIGH VOLTAGE SWITCHGEAR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8014832U 1980-05-30
DE19808014832U DE8014832U1 (en) 1980-05-30 1980-05-30 INDUCTIVE VOLTAGE CONVERTER FOR A FULLY INSULATED, METAL-ENCLOSED HIGH-VOLTAGE SWITCHGEAR

Publications (4)

Publication Number Publication Date
EP0041917A2 EP0041917A2 (en) 1981-12-16
EP0041917A3 EP0041917A3 (en) 1982-01-20
EP0041917B1 EP0041917B1 (en) 1985-03-27
EP0041917B2 true EP0041917B2 (en) 1988-11-09

Family

ID=6715974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81730049A Expired EP0041917B2 (en) 1980-05-30 1981-05-14 Inductive-voltage transformer for a fully insulated, metal-enclosed high-voltage switchgear

Country Status (4)

Country Link
EP (1) EP0041917B2 (en)
AT (1) ATE12437T1 (en)
DE (1) DE8014832U1 (en)
ZA (1) ZA813613B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4338537A1 (en) * 1993-11-11 1995-05-18 Sachsenwerk Ag Inductive electrical converter for medium voltage
CN104361985B (en) * 2014-10-31 2017-07-28 平高集团有限公司 A kind of voltage transformer and its pin configuration
CN112802657B (en) * 2021-01-11 2023-06-09 中气电力装备有限公司 Transformer assembly type supporting component for mountain environment

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT131016B (en) * 1930-07-04 1932-12-27 Siemens Ag Arrangement for measuring high voltages, especially in X-ray systems.
DE626600C (en) * 1933-03-04 1936-02-28 Guenther Kujath Dipl Ing Measuring device for high voltages
GB1204446A (en) * 1968-03-29 1970-09-09 Muirhead Ltd Formerly Known As Improvements relating to electrical components

Also Published As

Publication number Publication date
ZA813613B (en) 1982-06-30
EP0041917B1 (en) 1985-03-27
EP0041917A2 (en) 1981-12-16
ATE12437T1 (en) 1985-04-15
EP0041917A3 (en) 1982-01-20
DE8014832U1 (en) 1980-08-28

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