EP0041917A2 - 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
EP0041917A2
EP0041917A2 EP81730049A EP81730049A EP0041917A2 EP 0041917 A2 EP0041917 A2 EP 0041917A2 EP 81730049 A EP81730049 A EP 81730049A EP 81730049 A EP81730049 A EP 81730049A EP 0041917 A2 EP0041917 A2 EP 0041917A2
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EP
European Patent Office
Prior art keywords
voltage
converter according
voltage converter
active system
metal
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Granted
Application number
EP81730049A
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German (de)
French (fr)
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EP0041917B2 (en
EP0041917A3 (en
EP0041917B1 (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
Publication of EP0041917A2 publication Critical patent/EP0041917A2/en
Publication of EP0041917A3 publication Critical patent/EP0041917A3/en
Application granted granted Critical
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-enclosed 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 and in which a high-voltage supply line ends.
  • the high-voltage winding of the active system is encompassed by an annular high-voltage electrode.
  • a high-voltage lead is mechanically and electrically connected to the high-voltage electrode.
  • the high-voltage supply line is fastened in a boiler isolator.
  • the invention has for its object to improve an inductive voltage converter for a fully insulated, metal-encapsulated high-voltage switchgear so that mechanical damage to the converter cannot occur even under abnormal operating conditions with an impending large current through the primary winding.
  • a resistance device is located in the boiler, and the resistance device extends from the high-voltage feed line to the active system.
  • the invention is based on the knowledge that, 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 converter occurs; the mechanical overload can become so great that the entire inductive voltage converter is permanently damaged. '' If a resistance device is installed in the boiler of an inductive voltage converter for fully insulated, metal-encapsulated high-voltage switchgear, which extends from the high-voltage supply line to the active system, the current through the primary winding of the voltage converter is reduced and mechanical overload is avoided.
  • the boiler of the .voltage converter does not need to be enlarged because of the resistance device, because it is generally between the active system and that facing the switchgear There is sufficient space at the end of the boiler to accommodate the resistance device.
  • the resistance device in the inductive voltage converter according to the invention can be designed in different ways. For high-voltage reasons and above all to achieve a resistance device with the highest possible mechanical strength. However, it has proven to be advantageous if the resistance device consists of a columnar structure of a plurality of mass resistance elements which are held together by means of pressure plates located at the ends of the columnar structure; one pressure plate is attached to the high-voltage supply line and the other pressure plate is connected to the active system.
  • the one pressure plate advantageously carries a threaded pin which is received by a threaded hole in the high-voltage supply line.
  • a plug device is attached to the active system at the point facing the resistance device, and the other pressure plate has a recess; the plug device engages in the recess.
  • a plug connection then only has to be made at the point between the resistance device and the active system.
  • the recess in the other pressure plate is cylindrical and extends funnel-shaped towards the active system.
  • the resistance device according to the invention can in principle be used in all inductive voltage converters for fully insulated, metal-encapsulated high-voltage switchgear, regardless of the particular structure or design of the active system.
  • the high voltage electrode may be provided in a structurally simple manner with the connector device, so that, overall, a simple construction is achieved despite the use of horrsein- T ichtung.
  • the resistance device itself can be designed in different ways. It is considered to be particularly advantageous if there is a round metal disc between two successive resistance elements in the columnar structure, which is provided with two equally high pressures on different sides; the press-in is cyclically offset in successive metal disks in the lateral direction such that a helical arrangement of the mass resistance elements is created.
  • the main advantage of a resistance device designed in this way is that a relatively low overall height can be achieved with it, which is particularly advantageous in view of the limited space in the boiler of an inductive voltage converter.
  • a helical arrangement of resistance elements with intermediate, round metal disks is known (DE-PS 10 15 909 and FR-PS 1 318 052), but the known arrangements are not series resistors for inductive voltage converters, but rather specially designed surge arresters.
  • the metal disks on each side have the press-in diametrically opposite at least one further press-in for receiving an insulating spacer.
  • 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 also advantageously have three through holes offset by 120 °, through which a clamping bolt made of insulating material is 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 active system 2 of the inductive voltage converter is accommodated in a boiler 1, which is only partially shown in FIG. 1.
  • a boiler 1 which is only partially shown in FIG. 1.
  • an iron core 3 and a high-voltage electrode 4 are shown in FIG. 1, which have an unrecognizable high-voltage winding on the outside includes.
  • 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 several round metal disks 9, between each of which one. 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 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 widened funnel-shaped 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 disk 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 accommodate cylindrical spacing elements, not shown, made of insulating material. These spacer elements are 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 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 phase resistance elements are held securely.
  • a mechanically very stable resistance device with a comparatively low overall height is achieved.
  • an inductive voltage converter is created which maintains its mechanical structure even in the event of large currents threatening in the event of abnormal operating conditions, this property being achieved without any lasting structural changes.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Regulation Of General Use Transformers (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Breakers (AREA)
  • Surgical Instruments (AREA)

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, metallgekapselte Hochspannungsschaltanlage mit einem an die Metallkapsel der Schaltanlage anflanschbaren Kessel aus, in dem sich das aktive System des Spannungswandlers befindet und in dem eine Hochspannungszuleitung endet.The invention is based on an inductive voltage converter for a fully insulated, metal-enclosed 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 and in which a high-voltage supply line ends.

Bei einem bekannten induktiven Spannungswandler dieser Art (DE-AS 24 52 056) ist die Hochspannungswicklung des aktiven Systems von einer ringförmigen Hochspannungselektrode umfaßt. Mit der Hochspannungselektrode ist eine Hochspannungszuleitung mechanisch und elektrisch verbunden. Die Hochspannungszuleitung ist in einem AbschluBisolator des Kessels befestigt.In a known inductive voltage converter of this type (DE-AS 24 52 056), the high-voltage winding of the active system is encompassed by an annular high-voltage electrode. A high-voltage lead is mechanically and electrically connected to the high-voltage electrode. The high-voltage supply line is fastened in a boiler isolator.

Der Erfindung liegt die Aufgabe zugrunde, einen induktiven Spannungswandler für eine vollisolierte, metallgekapselte Hochspannungsschaltanlage so zu verbessern, daß auch bei anormalen Betriebszuständen mit drohendem großem Strom durch die Primärwicklung eine mechanische Beschädigung des Wandlers nicht auftreten kann.The invention has for its object to improve an inductive voltage converter for a fully insulated, metal-encapsulated high-voltage switchgear so that mechanical damage to the converter cannot occur even under abnormal operating conditions with an impending large current through the primary winding.

Zur Lösung dieser Aufgabe befindet sich bei einem induktiven Spannungswandler der eingangs angegebenen Art erfindtngsgemäß im Kessel eine Widerstandseinrichtung, und die Widerstandseinrichtung erstreckt sich von der Hochspannungszuleitung zum aktiven System.In order to achieve this object, according to the invention, in the case of an inductive voltage converter of the type specified at the outset, a resistance device is located in the boiler, and the resistance device extends from the high-voltage feed line to the active system.

DerErfindung liegt die Erkenntnis zugrunde, daß insbesondere an Kabel angeschlossener induktive Spannungswandler bei Entladungsvorgängen primärseitig mit einem derart großen Strom beaufschlagt werden können, 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 Spannungswandlers für vollisolierte, metallgekapselte Hochspannungsschaltanlagen eine Widerstandseinrichtung untergebracht, die sich von der Hochspannungszuleitung zum aktiven System erstreckt, dann wird dadurch der Strom durch die Primärwicklung des Spannungswandlers verringert und damit auch eine mechanische Überlastung vermieden. Durch die Unterbringung der Widerstandseinrichtung in der Weise, daß sie sich von der Hochspannungszuleitung zum aktiven System erstreckt ist erreicht, daß der Kessel des .Spannungswandlers wegen der Widerstandseinrichtung nicht vergrößert zu werden braucht, weil in der Regel zwischen dem aktiven System und dem der Schaltanlage zugewandten Ende des Kessels ausreichend Raum zur Unterbringung der Widerstandseinrichtung vorhanden ist.The invention is based on the knowledge that, 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 converter occurs; the mechanical overload can become so great that the entire inductive voltage converter is permanently damaged. '' If a resistance device is installed in the boiler of an inductive voltage converter for fully insulated, metal-encapsulated high-voltage switchgear, which extends from the high-voltage supply line to the active system, the current through the primary winding of the voltage converter is reduced and mechanical overload is avoided. By accommodating the resistance device in such a way that it extends from the high-voltage feed line to the active system, it is achieved that the boiler of the .voltage converter does not need to be enlarged because of the resistance device, because it is generally between the active system and that facing the switchgear There is sufficient space at the end of the boiler to accommodate the resistance device.

Es ist zwar bekannt (DE-AS 10 77 319), in Reihe mit der Primärwicklung einen Dämpfungswiderstand anzuordnen, jedoch geht aus dieser Druckschrift nur die schaltungsmäßige Anordnung eines solchen Widerstandes hervor; Angaben über eine vorteilhafte räumliche Anordnung eines solchen Dämpfungswiderstandes insbesondere bei induktiven Spannungswandler für vollisolierte, metallgekapselte Hochspannungsschaltanlagen finden sich in dieser Druckschrift nicht.Although it is known (DE-AS 10 77 319) to arrange a damping resistor in series with the primary winding, this document only shows the circuit arrangement of such a resistor; This publication does not contain any information about an advantageous spatial arrangement of such a damping resistor, particularly in the case of inductive voltage converters for fully insulated, metal-encapsulated high-voltage switchgear.

Die Widerstandseinrichtung kann bei dem erfinduzgsgemäßen induktiven Spannungswandler in unterschiedlicher Weise ausgebildet sein. Aus hochspannungstechnischen Gründen und vor allem zur Erzielung einer Widerstandseinrichtung mit möglichst hoher mechanischer Festigkeit hat . es sich jedoch als vorteilhaft erwiesen, wenn die Widerstandseinrichtung aus einem säulenförmigen Aufbau mehrerer Massewiderstandselemente besteht, die mittels an den Enden des säulenförmigen Aufbaus befindlicher Druckplatten zusammengehalten sind; die eine Druckplatte ist an der Hochspannungszuleitung befestigt und die andere Druckplatte mit dem aktiven System verbunden.The resistance device in the inductive voltage converter according to the invention can be designed in different ways. For high-voltage reasons and above all to achieve a resistance device with the highest possible mechanical strength. However, it has proven to be advantageous if the resistance device consists of a columnar structure of a plurality of mass resistance elements which are held together by means of pressure plates located at the ends of the columnar structure; one pressure plate is attached to the high-voltage supply line and the other pressure plate is connected to the active system.

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

Um einen möglichst einfach montierbaren,induktiven Spannungswandler zu erhalten, ist gemäß einer Weiterbildung deserfindungsgemäßen Spannungswandlers an dem aktiven System an der der Widerstandseinrichtung zugewandten Stelle eine Steckereinrichtung angebracht, und die andere Druckplatte weist eine Ausnehmung auf; die Steckereinrichtung greift in die Ausnehmung ein. Bei der Montage deserfindungsgemäßen Spannungswandlers muß dann an der Stelle zwischen der Widerstandseinrichtung und dem aktiven System lediglich eine Steckverbindung hergestellt werden.In order to obtain an inductive voltage converter that is as easy to install as possible, according to a development of the voltage converter according to the invention, a plug device is attached to the active system at the point facing the resistance device, and the other pressure plate has a recess; the plug device engages in the recess. When installing the voltage converter according to the invention, a plug connection then only has to be made at the point between the resistance device and the active system.

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 zum aktiven System 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 extends funnel-shaped towards the active system.

Die Widerstandseinrichtung gemäß der Erfindung läßt sich grundsätzlich bei allen induktiven Spannungswandlern für vollisolierte, metallgekapselte Hochspannungsschaltanlagen unabhängig von den jeweiligen Aufbau bzw. der konstruktiven Ausgestaltung des aktiven Systems anwenden. In besonders vorteilhafter Weise läßt sich . die Widerstandseinrichtung bei einem Spannungswandler mit einer die Hochspannungswicklung des aktiven Systems koaxial umfassenden Hochspannungselektrode einsetzen, wenn die Widerstandseiprichtung zwischen der Hochspannungszuleitung und der Hochspannungselektrode liegt.The resistance device according to the invention can in principle be used in all inductive voltage converters for fully insulated, metal-encapsulated high-voltage switchgear, regardless of the particular structure or design of the active system. In a particularly advantageous manner, use the resistance device in a voltage converter with a high-voltage electrode coaxially encompassing the high-voltage winding of the active system if the resistance direction lies between the high-voltage feed line and the high-voltage electrode.

In diesem Falle kann die Hochspannungselektrode in konstruktiv einfacher Weise mit der Steckereinrichtung versehen werden, so daß insgesamt ein einfacher Aufbau trotz Einsatzes der Widerstandsein- Tichtung erzielt ist.In this case, the high voltage electrode may be provided in a structurally simple manner with the connector device, so that, overall, a simple construction is achieved despite the use of Widerstandsein- T ichtung.

Die Widerstandseinrichtung selbst kann in unterschiedlicher Weise ausgeführt sein. Als besonders vorteilhaft wird es angesehen, wenn bei ihr zwischen zwei im säulenförmigen Aufbau jeweils aufeinanderfolgenden Widerstandselementen eine runde Metallscheibe liegt, die mit zwei gleich hohen Einpressungen auf verschiedenen Seiten versehen ist; die Einpressungen sind in aufeinanderfolgenden Metallscheiben in seitlicher Richtung zyklisch derart versetzt, daß eine wendelförmige Anordnung der Massewiderstandselemente entsteht. Der wesentliche Vorteil einer derart ausgebildeten Widerstandseinrichtung besteht darin, daß mit ihr eine relativ geringe Bauhöhe erzielbar ist, was im Hinblick auf die beengten Platzverhältnisse im Kessel eines induktiven Spannungswandlers besonders vorteilhaft ist.The resistance device itself can be designed in different ways. It is considered to be particularly advantageous if there is a round metal disc between two successive resistance elements in the columnar structure, which is provided with two equally high pressures on different sides; the press-in is cyclically offset in successive metal disks in the lateral direction such that a helical arrangement of the mass resistance elements is created. The main advantage of a resistance device designed in this way is that a relatively low overall height can be achieved with it, which is particularly advantageous in view of the limited space in the boiler of an inductive voltage converter.

Eine wendelförmige Anordnung von Widerstandselementen mit dazwischenliegenden, runden Metallscheiben ist zwar bekannt (DE-PS 10 15 909 und FR-PS 1 318 052), jedoch handelt es sich bei den bekannten Anordnungen nicht um Vorwiderstände für induktive Spannungswandler, sondern um speziell ausgebildete Überspannungsableiter.A helical arrangement of resistance elements with intermediate, round metal disks is known (DE-PS 10 15 909 and FR-PS 1 318 052), but the known arrangements are not series resistors for inductive voltage converters, but rather specially designed surge arresters.

Bei der Widerstandseinrichtung weisen die Metallscheiben auf jeder Seite den Einpressungen diametral gegenüber mindestens eine weitere Einpressung zur Aufnehmung 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 on each side have the press-in diametrically opposite at least one further press-in for receiving an insulating spacer. 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 jeweils ein Spannbolzen aus Isolierwerkstoff geführt ist; die Spannbolzen verspannen die Druckplatten miteinander. Auf diese Weise ist ein mechanisch feste Ausgestßltung der Widerstandseinrichtung erreicht.The metal disks also advantageously have three through holes offset by 120 °, through which a clamping bolt made of insulating material is 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 Spannbolzeneingreifen. 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, Zur Erläuterung der Erfindung ist in

  • Fig. 1 ein Ausführungsbeispiel deserfindungsgemäßen 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.
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, To explain the invention is in
  • Fig. 1 shows an embodiment of the inventive inductive voltage converter 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 Spannnungswandlers untergebracht Von dem induktiven 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.The active system 2 of the inductive voltage converter is accommodated in a boiler 1, which is only partially shown in FIG. 1. Of the inductive system 2, only part of an iron core 3 and a high-voltage electrode 4 are shown in FIG. 1, which have an unrecognizable high-voltage winding on the outside includes.

An der Hochspannungselektrode 4 ist außen eine Steckereinrichtung.5 angebracht, die eine elektrische Verbindung zu einer Widerstandseinrichtung 6 schafft.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 Figuren 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 several round metal disks 9, between each of which one. 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 Durchgangslöchem 15 in der einen Druckplatte 7 geführt und durt 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 Widerstandeeinrichtung 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 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 widened funnel-shaped 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 Figuren 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 Isolierwerkstoff 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 FIGS. 4 and 5 show in detail, each individual metal disk 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 accommodate cylindrical spacing elements, not shown, made of insulating material. These spacer elements are 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 Maseewiderstandselemente sicher gehalten sind. Vor allem jedoch ist eine mechanisch sehr stabile Widerstandseinrichtung mit verhälsnismäßig 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 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 phase resistance elements are held securely. Above all, however, a mechanically very stable resistance device with a comparatively low overall height is achieved.

Mit der Erfindung ist ein induktiver Spannungswandler geschaffen, der auch bei im Falle anormaler Betriebszustände drohenden großen Strömen seinen mechanischen Aufbau beibehält, wobei diese Eigenschft ohne nachhaltiger konstruktive Änderungen erreicht ist.With the invention, an inductive voltage converter is created which maintains its mechanical structure even in the event of large currents threatening in the event of abnormal operating conditions, this property being achieved without any lasting structural changes.

Claims (13)

1. Induktiver Spannungswandler für eine vollisolierte, metallgekapselte Hochspannungsschaltanlage mit einem an die Metallkapsel der Schaltanlage anflanschbaren Kessel, in dem sich das aktive System des Spannungs- wandlers befindet und in dem eine Hochspannungszuleitung endet, dadurch gekennzeichnet , daß sich im Kessel (1) eine Widerstandseinrichtung (6) befindet und daß sich die Widerstandseinrichtung (6) von der Hochspannungszuleitung (24) zum aktiven System erstreckt.1. An inductive voltage transformer for a fully insulated, metal-enclosed high-voltage switchgear with a flange-mounted to the metal capsule of the switchgear boiler, in which the active system of the voltage - the transducer is located and in which terminates a high voltage supply line, characterized in that in the boiler (1) a resistor means (6) and that the resistance device (6) extends from the high voltage supply line (24) to the active system. 2. Spannungswandler nach Anspruch 1 , dadurch gekennzeichnet , daß die Widerstandseinrichtung (6) aus einem säulenförmigen Aufbau mehrerer . Massewiderstandselemente (10) besteht, die mittels an den Enden des säulenförmigen Aufbaus befindlicher Druckplatten (7, 8) zusammengehalten sind, und daß die eine Druckplatte (7) an der Hochspannungszuleitung (24) befestigt und die andere Druckplatte (8) mit dem aktiven System (2) verbunden ist.2. Voltage converter according to claim 1, characterized in that the resistance device (6) from a columnar structure of several. Mass resistance elements (10), which are held together by means of pressure plates (7, 8) located at the ends of the columnar structure, and that one pressure plate (7) is attached to the high-voltage supply line (24) and the other pressure plate (8) with the active system (2) is connected. 3. Spannungswandler nach Anspruch 2 , dadurch gekennzeichnet , daß die eine Druckplatte (7) einen Gewindezapfen (22) trägt, der von einer Gewindebohrung (23) in der Hochspannungszuleitung (24) aufgenommen ist.3. Voltage converter according to claim 2, characterized in that the one pressure plate (7) carries a threaded pin (22) which is received by a threaded bore (23) in the high-voltage supply line (24). 4. Spannungswandler nach Anspruch 2 oder 3 , dadurch gekennzeichnet , daß an dem aktiven System (2) an der der Widerstandseinrichtung (6) zugewandten Stelle eine Steckereinrichtung (5) angebracht ist, daß die andere Druckplatte (8) eine Ausnehmung (21) aufweist und daß die Steckereinrichtung (5) in die Ausnehmung (21) eingreift.4. Voltage converter according to claim 2 or 3, characterized in that on the active system (2) at the resistance device (6) facing a plug device (5) is attached, that the other pressure plate (8) has a recess (21) and that the plug device (5) engages in the recess (21). 5. Spannungswandler nach Anspruch 4 , dadurch gekennzeichnet , daß die Ausnehmung (21) zylindrisch ist und sich zum aktiven System hin trichterförmig erweitert.5. Voltage converter according to claim 4, characterized in that the recess (21) is cylindrical and widens in a funnel shape towards the active system. 6. Spannungswandler nach einem der vorangehenden Ansprüche mit einer die Hochspannungswicklung des aktiven Systems koaxial umfassenden Hochspannungselektrode, dadurch gekennzeichnet , daß die Widerstandseinrichtung (6) zwischen der Hochspannungszuleitung (24) und der Hochspannungselektrode (4) liegt.6. Voltage converter according to one of the preceding claims with a high-voltage winding coaxially comprising the high-voltage winding of the active system, characterized in that the resistance device (6) lies between the high-voltage lead (24) and the high-voltage electrode (4). 7. Spannungswandler nach Anspruch 6 , dadurch gekennzeichnet , daß die Hochspannungselektrode (4) die Steckereinrichtung (5) trägt.7. Voltage converter according to claim 6, characterized in that the high voltage electrode (4) carries the plug device (5). 8. Spannungswandler nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet , daß zwischen zwei im säulenförmigen Aufbau jeweils aufeinanderfolgenden Massewiderstandselementen (10) eine runde Metallscheibe (9) liegt, die mit zwei gleich hohen Einpressungen (31, 32) auf verschiedenen Seiten versehen ist, und daß die Einpressungen (31, 32) in aufeinander folgenden Metallscheiben (9) in seitlicher Richtung zyklisch derart versetzt sind, daß eine wendelförmige Anordnung der Massewiderstandselemente (10) entsteht.8. Voltage converter according to one of claims 2 to 7, characterized in that between two in the columnar structure successive mass resistance elements (10) is a round metal disc (9) which is provided with two equally high press-in (31, 32) on different sides , and that the press-in (31, 32) in successive metal disks (9) are cyclically offset in the lateral direction such that a helical arrangement of the mass resistance elements (10) is formed. 9. Spannungswandler nach Anspruch 8 , dadurch gekennzeichnet , daß die Metallscheiben (9) auf jeder Seite der Einpressung (31, 32) diametral gegenüber mindestens eine weitere Einpressung (33, 34) zur Aufnahme eines isolierenden Abstandselementes aufweisen.9. Voltage converter according to claim 8, characterized in that the metal disks (9) on each side of the press-in (31, 32) diametrically opposite at least one further press-in (33, 34) for receiving an insulating spacer. 10. Spannungswandler nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß die Metallscheiben (9) drei um 120° gegeneinander versetzte Durchgangslöcher (12, 13, 14) aufweisen, daß durch die fluchtenden Durchgangslöcher (12, 13, 14) der Metallscheiben (9) jeweils ein Spannbolzen (11) aus Isolierwerkstoff geführt ist und daß die Spannbolzen (11) die Druckplatten (7, 8) miteinander verspannen.10. Voltage converter according to claim 8 or 9, characterized in that the Metal disks (9) have three through holes (12, 13, 14) offset from one another by 120 °, that through the aligned through holes (12, 13, 14) of the metal disks (9) a clamping bolt (11) made of insulating material is guided and that Tension bolts (11) clamp the pressure plates (7, 8) together. 11. Spannungswandler nach Anspruch 10 , dadurch gekennzeichnet , daß die Spannbolzen (11) in der einen Druckplatte (7) durch Stifte (16) gehalten sind, die in Querbohrungen (17) der Spannbolzen (11) eingreifen.11. Voltage converter according to claim 10, characterized in that the clamping bolts (11) in one pressure plate (7) are held by pins (16) which engage in transverse bores (17) of the clamping bolts (11). 12. Spannungswandler nach Anspruch 10 oder 11, dadurch gekennzeichnet , daß die Spannbolzen (11) im Bereich der anderen Druckplatte (8) Gewindebuchsen (18) tragen, auf die zur Verspannung Muttern (20) geschraubt sind.12. Voltage converter according to claim 10 or 11, characterized in that the clamping bolts (11) in the area of the other pressure plate (8) carry threaded bushes (18) onto which nuts (20) are screwed for bracing. 13. Spannungswandler nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, daß die Metallscheiben (9) am Rande mit einem umlaufenden Wulst versehen sind.13. Voltage converter according to one of claims 8 to 12, characterized in that the metal disks (9) are provided on the edge with a circumferential bead.
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
DE19808014832U DE8014832U1 (en) 1980-05-30 1980-05-30 INDUCTIVE VOLTAGE CONVERTER FOR A FULLY INSULATED, METAL-ENCLOSED HIGH-VOLTAGE SWITCHGEAR
DE8014832U 1980-05-30

Publications (4)

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

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104361985A (en) * 2014-10-31 2015-02-18 平高集团有限公司 Voltage transformer and lead wire structure thereof
CN112802657A (en) * 2021-01-11 2021-05-14 刘树伟 Assembled supporting component of transformer for mountain environment

Families Citing this family (1)

* 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

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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
DE1908444A1 (en) * 1968-03-29 1970-01-29 Muirhead Ltd Electrical component

Patent Citations (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
DE1908444A1 (en) * 1968-03-29 1970-01-29 Muirhead Ltd Electrical component

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104361985A (en) * 2014-10-31 2015-02-18 平高集团有限公司 Voltage transformer and lead wire structure thereof
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
CN112802657A (en) * 2021-01-11 2021-05-14 刘树伟 Assembled supporting component of transformer for mountain environment

Also Published As

Publication number Publication date
ZA813613B (en) 1982-06-30
EP0041917B2 (en) 1988-11-09
ATE12437T1 (en) 1985-04-15
EP0041917A3 (en) 1982-01-20
EP0041917B1 (en) 1985-03-27
DE8014832U1 (en) 1980-08-28

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