EP0315835A1 - High-voltage potential tranformer - Google Patents

High-voltage potential tranformer Download PDF

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Publication number
EP0315835A1
EP0315835A1 EP88117960A EP88117960A EP0315835A1 EP 0315835 A1 EP0315835 A1 EP 0315835A1 EP 88117960 A EP88117960 A EP 88117960A EP 88117960 A EP88117960 A EP 88117960A EP 0315835 A1 EP0315835 A1 EP 0315835A1
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EP
European Patent Office
Prior art keywords
voltage
winding
low
voltage winding
metal screen
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88117960A
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German (de)
French (fr)
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EP0315835B1 (en
Inventor
Norbert Dipl.-Ing. Fh Preissinger
Hermann Dipl.-Ing. Fh Eberlein
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Trench Germany GmbH
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MWB Messwandler Bau AG
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Priority to AT88117960T priority Critical patent/ATE85725T1/en
Publication of EP0315835A1 publication Critical patent/EP0315835A1/en
Application granted granted Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • 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 present invention relates to a high-voltage converter, in particular a combined high-voltage current and voltage converter in a head design, according to the preambles of claims 1 and 8.
  • Such high-voltage converters are known per se.
  • it is customary to mount the active parts of the converter consisting of core, high and low voltage windings on an insulating column and to surround them with a head housing.
  • the insulating column is attached to a foot section that supports the terminal box with the terminal board for the converter's rejects.
  • the secondary leads from the converter head housing to the terminal board are therefore relatively long. This applies in particular to combined high-voltage current and voltage transformers in the design according to the earlier German patent application P 36 08 390.9, in which the voltage transformer is arranged above the current transformer.
  • the capacitance between the metallic shields of both windings is relatively small.
  • the object of the present invention is accordingly to improve a high-voltage converter, in particular a combined high-voltage current and voltage converter in a head design, of the type mentioned at the outset in such a way that high potential couplings, in particular triggered by high-frequency, transient switching processes, on the secondary side of the converter, in particular on the secondary terminals can no longer occur in a disturbing scope.
  • the present invention ensures that a very large capacitance is formed between the metal shield of the high voltage winding and the lead electrode of the voltage converter.
  • the lead electrode is electrically connected to the outer shield electrode in the shortest possible way and therefore with very little inductance. This reliably prevents the metal shield of the high-voltage winding from rising to impermissibly high values and prevents impermissibly high transient overvoltages from being coupled into the low-voltage winding.
  • FIG. It consists of a base part 1 with a terminal box 3 containing a terminal board 2.
  • a support insulator 4 is arranged tightly and firmly, which carries a metal end plate 5 at the top.
  • a U-shaped primary conductor 6 with the legs 7, 8 and the base 9 attached, one leg 8 is electrically conductively connected to the end plate 5 and the other leg 7 is brought out in an electrically insulating manner and can be contacted from the outside.
  • the base 9 of the primary conductor 6 is surrounded concentrically by a secondary winding 10 with a plurality of cores.
  • the primary conductor 6 and the secondary winding 10 form a high-voltage current transformer, the secondary leads of which are led to the terminal board 2.
  • the connections 11 of the legs 7, 8 and thus the end plate 5 are at high voltage potential.
  • a high-voltage converter 12 is arranged above the high-voltage current transformer 6, 10. It is electrically connected, for example, to a connector 13 with the former, the outlets of the voltage converter 12 being arranged in the connector 13 and then - like the secondary outlets of the current converter 6, 10 - being guided to the terminal board 2.
  • the voltage converter 12 consists in a known manner of an iron core 15 made of magnetizable material.
  • the high-voltage winding 16 is applied around its one leg as a cylinder, step or trapezoidal winding. This is concentrically surrounded by a low-voltage winding 17.
  • These active parts of the entire voltage converter 12 are surrounded concentrically by an annular or cylindrical shielding electrode 18 which is at ground potential.
  • a pot-shaped one- or multi-part housing 19 is tightly and firmly attached, which surrounds both transducers 6, 10 and 12 together and is at high voltage potential.
  • FIG. 2 shows a section of the voltage converter of a combined high-voltage current and voltage converter in a head design according to FIG. 1.
  • this voltage converter can also be used without being combined with a current converter.
  • the last turn or turn position of the two-stage high-voltage winding 16 surrounding the iron core is provided with a slotted metal screen 20 which extends over its winding length.
  • the latter consists of a layer of highly electrically conductive material, for example copper, silver or zinc, or of a metal covering in the form of a metal foil or a metal cylinder.
  • the metal screen 20 is slotted in a manner known per se in the direction of the longitudinal axis W of the winding in order to prevent short-circuit currents from occurring.
  • a lead 21 is electrically connected to the metal screen 20 and leads to the terminal X for the high-voltage winding 16 in the terminal board 2.
  • a concentrically surrounding discharge electrode 22 which forms a large capacitance with the metal screen 20.
  • the space provided by the distance A is partially or completely filled with insulating tapes or foils, these being impregnated with the insulating gas or a liquid insulating medium of the present gas- or oil-insulated combined high-voltage current and voltage converter. It is sufficient to apply only a few insulation layers, for example 4 to 6 insulation layers with an insulation tape or insulation film thickness of 40 to 80 ⁇ , which results in a total distance A of 160 to 360 ⁇ . However, several insulating layers up to a maximum distance A of approximately 5 mm can also be provided.
  • the lead-off electrode 22 consists of an electrically conductive layer, in particular a metal layer or a metallic cylinder or a metal foil or steps thereof. When using metallic cylinder or metal foil electrodes, these can be glued and / or bandaged, for example by means of an insulating bandage winding.
  • the coaxial low-voltage winding 17 is arranged above the discharge electrode 22 at a relatively large distance B, which is primarily determined by the necessary fastening and support elements 24.
  • This is provided with an earthed metallic shield 25, which preferably surrounds the low-voltage winding 17 on all sides, but whose cylindrical parts are also slotted in the direction of the longitudinal axis W of the low-voltage winding 17 and in the circumferential direction in order to prevent short-circuit currents.
  • the shield 25 of the low-voltage winding 17 is connected in an electrically conductive manner to the shielding electrode 18, which is connected to earth potential, via a, preferably a plurality of connecting brackets 26 distributed around the circumference, with low inductance.
  • the discharge electrode 22 is also connected to the shielding electrode 18 via at least one, but preferably via a plurality of short, as wide as possible connecting lines 27 distributed around the circumference.
  • the connection should be as inductive as possible, so it must be as short as possible.
  • the secondary outlets 28, 29 of the low-voltage winding 17 are like the outlet 21 for the metal screen 20 led to the terminal board 2. This can be done together while maintaining an insulation level of 3 kV within the discharge pipe. The risk of breakdowns in transient, high-frequency processes as a result of coupling too high potential to the connection terminals in the terminal box 3 is effectively excluded by the measures according to the invention.
  • FIG. 3 which shows a modification of the high-voltage voltage converter according to FIG. 2, the same parts are designated with the same reference numbers as in FIG. 2.
  • the metal screen 20 of the high-voltage winding 16 is electrically conductively contacted via at least one further metallic coating 20 a on the support body 30 of the low-voltage winding 17 and distributed by means of the diversion, distributed over the circumference of the high-voltage winding 16 21 connected to the terminal X for the high-voltage winding 16. Details can be found in particular in FIGS. 4 and 5.
  • the electrical insulation between the metallic coating 20 a or between the metallic coatings 20 a and the discharge electrode (s) 22 a preferably corresponds to the embodiment as was described in more detail in FIG. 2. Even in the embodiment According to FIG. 3, the lead electrode or lead electrodes 22 a are connected in an electrically conductive manner to the shielding electrode 18 via one or more connecting leads 27 a in the shortest way, that is to say with little inductance.

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

Abstract

Ein Hochspannungsspannungswandler mit einem auf Hochspannung liegenden Kern, den eine mit einem geschlitzten Metallschirm versehene Hochspannungswicklung koaxial umgibt und mit einer diese ebenfalls koaxial umgebenden Niederspannungswicklung, sowie mit einer die Hoch- und Niederspannungswicklung umgebenden, auf Erdpotential liegenden koaxialen Abschirmelektrode soll so ausgebildet werden, daß Einkopplungen hoher Potentiale durch hochfrequente transiente Schaltvorgänge auf die Sekundärseite, vor allem die Sekundärausleitungen, in störendem Umfange nicht auftreten können. Dies wird dadurch erreicht, daß der Metallschirm (20) mittels der Ausleitung (21) mit der Anschlußklemme (X) für die Hochspannungswicklung (16) verbunden ist, daß im geringen Abstand A bis zu max. 5 mm von dem Metallschirm (20) entfernt eine diesen konzentrisch umgebende Ableitelektrode (22) zu dem Metallschirm (20) isoliert angebracht ist. Die Ableitelektrode (22) ist über einen oder mehrere Anschlußleitungen (27) induktivitätsarm mit der Abschirmelektrode (18) elektrisch leitend verbunden. Die Niederspannungswicklung (17) ist mit einer weiteren, geschlitzten metallischen Abschirmung (25) versehen, die ebenfalls induktivitätsarm mit der Abschirmelektrode (18) elektrisch leitend verbunden istA high-voltage converter with a core lying at high voltage, which is coaxially surrounded by a high-voltage winding provided with a slotted metal screen and with a low-voltage winding which also coaxially surrounds it, as well as with a coaxial shielding electrode which surrounds the high and low-voltage winding and is at earth potential so that couplings are made high potentials due to high-frequency transient switching processes on the secondary side, especially the secondary rejects, cannot occur to a disruptive extent. This is achieved in that the metal screen (20) is connected by means of the diversion (21) to the connection terminal (X) for the high-voltage winding (16), that at a short distance A up to max. 5 mm from the metal screen (20) there is a concentrically surrounding discharge electrode (22) attached to the metal screen (20). The discharge electrode (22) is electrically conductively connected to the shielding electrode (18) via one or more connecting lines (27) with little inductance. The low-voltage winding (17) is provided with a further, slotted metallic shield (25) which is also connected to the shielding electrode (18) in an electrically conductive manner with little inductance

Description

Die vorliegende Erfindung bezieht sich auf einen Hoch­spannungsspannungswandler, insbesondere kombinierten Hochspannungsstrom- und -spannungswandler in Kopfbau­weise, gemäß den Oberbegriffen der Ansprüche 1 und 8.The present invention relates to a high-voltage converter, in particular a combined high-voltage current and voltage converter in a head design, according to the preambles of claims 1 and 8.

Derartige Hochspannungsspannungswandler sind an sich bekannt. Bei kombinierten Strom- und Spannungswandlern in Kopfbauweise ist es üblich, die aus Kern, Hoch- und Niederspannungswicklung bestehenden Aktivteile des Wandlers auf einer isolierenden Säule zu montieren und mit einem Kopfgehäuse zu umgeben. Die Isoliersäule ist an einem Fußteil befestigt, das den Klemmenkasten mit dem Klemmenbrett für die Ausleitungen des Wandlers trägt. Die Sekundärausleitungen vom Kopfgehäuse des Wandlers zum Klemmenbrett sind daher relativ lang. Dies gilt insbesondere für kombinierte Hochspannungs­strom- und -spannungswandler in der Bauweise gemäß der eigenen älteren deutschen Patentanmeldung P 36 08 390.9, bei der der Spannungswandler über dem Stromwandler ange­ordnet ist.Such high-voltage converters are known per se. In the case of combined current and voltage transformers in a head design, it is customary to mount the active parts of the converter consisting of core, high and low voltage windings on an insulating column and to surround them with a head housing. The insulating column is attached to a foot section that supports the terminal box with the terminal board for the converter's rejects. The secondary leads from the converter head housing to the terminal board are therefore relatively long. This applies in particular to combined high-voltage current and voltage transformers in the design according to the earlier German patent application P 36 08 390.9, in which the voltage transformer is arranged above the current transformer.

Infolge des aufgrund der notwendigen Befestigungselemente für die Niederspannungswicklung zwischen dem Metallschirm der Hochspannungswicklung und der Niederspannungswicklung bedingten großen Abstandes ist die Kapazität zwischen den metallischen Abschirmungen beider Wicklungen relativ klein.Due to the large distance between the metal shield of the high-voltage winding and the low-voltage winding due to the necessary fastening elements for the low-voltage winding, the capacitance between the metallic shields of both windings is relatively small.

Es hat sich nun bei derartigen Anordnungen herausgestellt, daß bei transienten, insbesondere hochfrequenten Vorgängen, vor allem ausgelöst durch Schaltvorgänge, der an sich auf Niederspannungspotential liegende Metallschirm der Hoch­spannungswicklung des Spannungswandlers auf ein hohes Potential von einigen 10 kV bis zu 100 kV oder mehr ange­hoben werden kann.It has now been found in such arrangements that in the case of transient, in particular high-frequency processes, especially triggered by switching processes, the metal shield of the high-voltage winding of the voltage converter, which is inherently at low voltage potential, is raised to a high potential of a few 10 kV up to 100 kV or more can.

Die Folge ist, daß beim Auftreten hoher Potentiale aufgrund hochfrequenter transienter Überspannungen an dem Metall­schirm der Hochspannungswicklung Einkopplungen dieser hochfrequenten Spannungen in die Niederspannungswicklung erfolgen. Dies kann sogar zur Zerstörung derartiger Hochspannungsspannungswandler führen, wenn die Isolation zwischen der metallischen Abschirmung und der Nieder­spannungswicklung zerstört wird.The result is that when high potentials occur due to high-frequency transient overvoltages on the metal screen of the high-voltage winding, these high-frequency voltages are coupled into the low-voltage winding. This can even lead to the destruction of such high-voltage converters if the insulation between the metallic shield and the low-voltage winding is destroyed.

Aufgabe der vorliegenden Erfindung ist es demgemäß, einen Hochspannungsspannungswandler, insbesondere einen kombi­nierten Hochspannungsstrom- und -spannungswandler in Kopf­bauweise, der eingangs erwähnten Art so zu verbessern, daß Einkopplungen hoher Potentiale, insbesondere durch hochfrequente, transiente Schaltvorgänge ausgelöst, auf die Sekundärseite des Wandlers, insbesondere auf die sekundären Anschlußklemmen in störendem Umfange nicht mehr auftreten können.The object of the present invention is accordingly to improve a high-voltage converter, in particular a combined high-voltage current and voltage converter in a head design, of the type mentioned at the outset in such a way that high potential couplings, in particular triggered by high-frequency, transient switching processes, on the secondary side of the converter, in particular on the secondary terminals can no longer occur in a disturbing scope.

Diese Aufgabe wird durch die im Kennzeichen der Ansprüche 1 und 8 angegebenen Merkmale gelöst.This object is achieved by the features specified in the characterizing part of claims 1 and 8.

Die vorliegende Erfindung stellt sicher, daß zwischen dem Metallschirm der Hochspannungswicklung und der Ableit­elektrode des Spannungswandlers eine sehr große Kapazität gebildet wird. Die Ableitelektrode wird auf kürzestem Wege und damit äußerst induktivitätsarm mit der äußeren Abschirmelektrode elektrisch verbunden. Damit wird ein Ansteigen des Potentials des Metallschirmes der Hoch­spannungswicklung auf unzulässig hohe Werte sicher ver­hindert und ein Einkoppeln unzulässig hoher transienter Überspannungen in die Niederspannungswicklung verhindert.The present invention ensures that a very large capacitance is formed between the metal shield of the high voltage winding and the lead electrode of the voltage converter. The lead electrode is electrically connected to the outer shield electrode in the shortest possible way and therefore with very little inductance. This reliably prevents the metal shield of the high-voltage winding from rising to impermissibly high values and prevents impermissibly high transient overvoltages from being coupled into the low-voltage winding.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben und werden nachfolgend anhand der in der Zeichnung veranschaulichten Ausführungs­beispiele näher beschrieben. Es zeigen:

  • Fig. 1 einen kombinierten Hochspannungsstrom- und -spannungswandler in Kopfbauweise im Schnitt,
  • Fig. 2 einen Hochspannungsspannungswandler, insbe­sondere für den Einsatz eines kombinierten Wandlers gemäß Fig. 1 als Teilausschnitt im Schnitt,
  • Fig. 3 eine Abwandlung des Hochspannungsspannungs­wandlers gemäß Fig. 2,
  • Fig. 4 und 5 schematische Darstellungen der im Ausführungs­beispiel gemäß Figur 3 verwendeten Schirme und Ableitelektroden.
Further advantageous embodiments of the invention are specified in the subclaims and are described in more detail below with reference to the exemplary embodiments illustrated in the drawing. Show it:
  • 1 is a combined high-voltage current and voltage converter in head design in section,
  • 2 shows a high-voltage converter, in particular for the use of a combined converter according to FIG. 1, as a partial section in section,
  • 3 shows a modification of the high-voltage converter according to FIG. 2,
  • 4 and 5 are schematic representations of the screens and lead electrodes used in the exemplary embodiment according to FIG. 3.

In Figur 1 ist ein kombinierter Hochspannungsstrom- und -spannungswandler dargestellt. Er besteht aus einem Fußteil 1 mit einem ein Klemmenbrett 2 enthaltenden Klemmenkasten 3. Auf dem Fußteil 1 ist ein Stützisolator 4 dicht und fest angeordnet, der oben eine metallische Abschlußplatte 5 trägt. Auf letzterer ist ein U-förmiger Primärleiter 6 mit den Schenkeln 7, 8 und der Basis 9 befestigt, wobei der eine Schenkel 8 mit der Abschluß­platte 5 elektrisch leitend verbunden ist und der andere Schenkel 7 elektrisch isolierend herausgeführt und von außen kontaktierbar ist.A combined high-voltage current and voltage converter is shown in FIG. It consists of a base part 1 with a terminal box 3 containing a terminal board 2. On the base part 1, a support insulator 4 is arranged tightly and firmly, which carries a metal end plate 5 at the top. On the latter is a U-shaped primary conductor 6 with the legs 7, 8 and the base 9 attached, one leg 8 is electrically conductively connected to the end plate 5 and the other leg 7 is brought out in an electrically insulating manner and can be contacted from the outside.

Die Basis 9 des Primärleiters 6 ist von einer Sekundär­wicklung 10 mit mehreren Kernen konzentrisch umgeben. Primärleiter 6 und Sekundärwicklung 10 bilden einen Hochspannungsstromwandler, dessen sekundäre Ausleitungen zum Klemmenbrett 2 geführt sind. Die Anschlüsse 11 der Schenkel 7, 8 und damit die Abschlußplatte 5 liegen auf Hochspannungspotential.The base 9 of the primary conductor 6 is surrounded concentrically by a secondary winding 10 with a plurality of cores. The primary conductor 6 and the secondary winding 10 form a high-voltage current transformer, the secondary leads of which are led to the terminal board 2. The connections 11 of the legs 7, 8 and thus the end plate 5 are at high voltage potential.

Über dem Hochspannungsstromwandler 6, 10 ist ein Hoch­spannungsspannungswandler 12 angeordnet. Er ist bei­spielsweise mit einem Verbindungsstück 13 mit ersterem elektrisch verbunden, wobei im Verbindungsstück 13 die Ausleitungen des Spannungswandlers 12 angeordnet und dann - wie die Sekundärausleitungen des Stromwandlers 6, 10 - zum Klemmenbrett 2 geführt sind.A high-voltage converter 12 is arranged above the high-voltage current transformer 6, 10. It is electrically connected, for example, to a connector 13 with the former, the outlets of the voltage converter 12 being arranged in the connector 13 and then - like the secondary outlets of the current converter 6, 10 - being guided to the terminal board 2.

Der Spannungswandler 12 besteht in bekannter Weise aus einem Eisenkern 15 aus magnetisierbarem Material. Um dessen einen Schenkel ist die Hochspannungswicklung 16 als Zylinder-, Stufen- oder Trapezwicklung aufgebracht. Diese ist konzentrisch von einer Niederspannungswicklung 17 umgeben. Diese Aktivteile des gesamten Spannungs­wandlers 12 sind konzentrisch von einer ringförmigen bzw. zylindrischen, auf Erdpotential liegenden Abschirmelektro­de 18 umgeben.The voltage converter 12 consists in a known manner of an iron core 15 made of magnetizable material. The high-voltage winding 16 is applied around its one leg as a cylinder, step or trapezoidal winding. This is concentrically surrounded by a low-voltage winding 17. These active parts of the entire voltage converter 12 are surrounded concentrically by an annular or cylindrical shielding electrode 18 which is at ground potential.

Auf der Abschlußplatte 5 ist ein topfförmiges ein- oder mehrteiliges Gehäuse 19 dicht und fest angebracht, das beide Wandler 6, 10 und 12 gemeinsam umgibt und auf Hoch­spannungspotential liegt.On the end plate 5, a pot-shaped one- or multi-part housing 19 is tightly and firmly attached, which surrounds both transducers 6, 10 and 12 together and is at high voltage potential.

In der Fig. 2 ist ein Ausschnitt des Spannungswandlers eines kombinierten Hochspannungsstrom- und -spannungs­wandlers in Kopfbauweise gemäß Fig. 1 dargestellt. Selbst­verständlich kann dieser Spannungswandler auch ohne mit einem Stromwandler kombiniert zu werden, Anwendung finden. Die letzte Windung oder Windungslage der den Eisenkern umgebenden zweistufigen Hochspannungswicklung 16 ist mit einem sich über deren Wickellänge erstreckenden ge­schlitzten Metallschirm 20 versehen. Letzterer besteht aus einer Schicht aus elektrisch gut leitfähigem Material, beispielsweise Kupfer, Silber oder Zink, oder aus einem Metallbelag in Form einer Metallfolie oder eines Metall­zylinders. Der Metallschirm 20 ist in an sich bekannter Weise in Richtung der Längsachse W der Wicklung geschlitzt, um das Auftreten von Kurzschlußströmen zu verhindern. Mit dem Metallschirm 20 ist eine Ausleitung 21 elektrisch verbunden, die zur Anschlußklemme X für die Hochspannungs­wicklung 16 im Klemmenbrett 2 geführt ist.FIG. 2 shows a section of the voltage converter of a combined high-voltage current and voltage converter in a head design according to FIG. 1. Of course, this voltage converter can also be used without being combined with a current converter. The last turn or turn position of the two-stage high-voltage winding 16 surrounding the iron core is provided with a slotted metal screen 20 which extends over its winding length. The latter consists of a layer of highly electrically conductive material, for example copper, silver or zinc, or of a metal covering in the form of a metal foil or a metal cylinder. The metal screen 20 is slotted in a manner known per se in the direction of the longitudinal axis W of the winding in order to prevent short-circuit currents from occurring. A lead 21 is electrically connected to the metal screen 20 and leads to the terminal X for the high-voltage winding 16 in the terminal board 2.

In geringem Abstand A von dem Metallschirm 20 ist eine diesen konzentrisch umgebenden Ableitelektrode 22 vorge­sehen, die mit dem Metallschirm 20 eine große Kapazität bildet. Der durch den Abstand A vorhandene Zwischenraum ist mit Isolierbändern oder Isolierfolien teilweise oder ganz ausgefüllt, wobei diese mit dem Isoliergas oder einem flüssigen Isoliermedium des vorliegenden gas- oder ölisolierten kombinierten Hochspannungsstrom- und -spannungswandlers imprägniert sind. Es genügt die An­bringung von nur wenigen Isolierlagen, beispielsweise von 4 bis 6 Isolierlagen bei einer Isolierband- oder Isolier­folienstärke von 40 bis 80 µ, was einen Gesamtabstand A von 160 bis 360 µ ergibt. Jedoch können auch mehrere Isolierlagen bis zu einem maximalen Abstand A von etwa 5 mm vorgesehen werden.At a short distance A from the metal screen 20 there is provided a concentrically surrounding discharge electrode 22 which forms a large capacitance with the metal screen 20. The space provided by the distance A is partially or completely filled with insulating tapes or foils, these being impregnated with the insulating gas or a liquid insulating medium of the present gas- or oil-insulated combined high-voltage current and voltage converter. It is sufficient to apply only a few insulation layers, for example 4 to 6 insulation layers with an insulation tape or insulation film thickness of 40 to 80 μ, which results in a total distance A of 160 to 360 μ. However, several insulating layers up to a maximum distance A of approximately 5 mm can also be provided.

Damit auch in der Ableitelektrode 22 kein Kurzschluß­strom induziert wird, ist diese ebenfalls mit mindestens einem in Richtung der Wickelachse W verlaufenden Schlitz versehen. Die Ableitelektrode 22 besteht aus einer elektrisch leitenden Schicht, insbesondere Metallschicht oder aus einem metallischen Zylinder oder einer Metall­folie oder Abschritten davon. Bei Verwendung von metalli­schen Zylinder- oder Metallfolien-Elektroden können diese angeklebt und/oder einbandagiert sein, beispiels­weise mittels einer isolierenden Bandagenwicklung.So that no short-circuit current is induced in the discharge electrode 22, this is also provided with at least one slot running in the direction of the winding axis W. The lead-off electrode 22 consists of an electrically conductive layer, in particular a metal layer or a metallic cylinder or a metal foil or steps thereof. When using metallic cylinder or metal foil electrodes, these can be glued and / or bandaged, for example by means of an insulating bandage winding.

Über der Ableitelektrode 22 ist in einem relativ großen Abstand B, der vor allem durch notwendige Befestigungs- und Tragelemente 24 bestimmt ist, die koaxiale Nieder­spannungswicklung 17 angeordnet. Diese ist mit einer geeerdeten metallischen Abschirmung 25 versehen, die vorzugsweise die Niederspannungswicklung 17 allseitig umschließt, deren zylindrische Teile aber ebenfalls in Richtung der Längsachse W der Niederspannungswicklung 17 und in Umfangsrichtung geschlitzt sind, um Kurzschluß­ströme zu verhindern. Die Abschirmung 25 der Nieder­spannungswicklung 17 ist über einen, vorzugsweise mehrere am Umfang verteilte Anschlußbügel 26 induktivitätsarm mit der auf Erdpotential gelegten Abschirmelektrode 18 elektrisch leitend verbunden.The coaxial low-voltage winding 17 is arranged above the discharge electrode 22 at a relatively large distance B, which is primarily determined by the necessary fastening and support elements 24. This is provided with an earthed metallic shield 25, which preferably surrounds the low-voltage winding 17 on all sides, but whose cylindrical parts are also slotted in the direction of the longitudinal axis W of the low-voltage winding 17 and in the circumferential direction in order to prevent short-circuit currents. The shield 25 of the low-voltage winding 17 is connected in an electrically conductive manner to the shielding electrode 18, which is connected to earth potential, via a, preferably a plurality of connecting brackets 26 distributed around the circumference, with low inductance.

Auch die Ableitelektrode 22 ist über zumindest einen, vorzugsweise aber über eine Vielzahl am Umfang verteilter kurzer, möglichst breiter Verbindungsleitungen 27 eben­falls mit der Abschirmelektrode 18 verbunden. Die Ver­bindung soll möglichst induktivitätsarm, muß also mög­lichst kurz ausgebildet sein.The discharge electrode 22 is also connected to the shielding electrode 18 via at least one, but preferably via a plurality of short, as wide as possible connecting lines 27 distributed around the circumference. The connection should be as inductive as possible, so it must be as short as possible.

Die Sekundärausleitungen 28, 29 der Niederspannungs­wicklung 17 sind wie die Ausleitung 21 für den Metall­ schirm 20 zum Klemmenbrett 2 geführt. Dies kann gemeinsam unter Einhaltung eines Isolierpegels von 3 kV innerhalb des Ausleitungsrohres erfolgen. Die Gefahr von Durch­schlägen bei transienten, hochfrequenten Vorgängen infol­ge Einkopplung zu hohen Potentials auf die Anschlußklemmen im Klemmenkasten 3 ist durch die erfindungsgemäßen Maß­nahmen wirksam ausgeschlossen.The secondary outlets 28, 29 of the low-voltage winding 17 are like the outlet 21 for the metal screen 20 led to the terminal board 2. This can be done together while maintaining an insulation level of 3 kV within the discharge pipe. The risk of breakdowns in transient, high-frequency processes as a result of coupling too high potential to the connection terminals in the terminal box 3 is effectively excluded by the measures according to the invention.

In dem Ausführungsbeispiel gemäß Figur 3, das eine Ab­wandlung des Hochspanungsspannungswandlers gemäß Figur 2 zeigt, sind die gleichen Teile mit den gleichen Bezugs­ziffern wie in Figur 2 bezeichnet.In the exemplary embodiment according to FIG. 3, which shows a modification of the high-voltage voltage converter according to FIG. 2, the same parts are designated with the same reference numbers as in FIG. 2.

In Abänderung des Hochspannungsspannungswandlers gemäß Figur 2 ist dort der Metallschirm 20 der Hochspannungs­wicklung 16 über am Umfang der Hochspannungswicklung 16 verteilte, elektrisch leitende Anschlußelemente 20 b mit zumindest einem weiteren metallischen Belag 20 a auf dem Tragkörper 30 der Niederspannungswicklung 17 elektrisch leitend kontakiert und mittels der Ausleitung 21 mit der Anschlußklemme X für die Hochspannungswicklung 16 ver­bunden. Einzelheiten hierzu ergeben sich insbesondere aus den Figuren 4 und 5.In a modification of the high-voltage converter according to FIG. 2, there the metal screen 20 of the high-voltage winding 16 is electrically conductively contacted via at least one further metallic coating 20 a on the support body 30 of the low-voltage winding 17 and distributed by means of the diversion, distributed over the circumference of the high-voltage winding 16 21 connected to the terminal X for the high-voltage winding 16. Details can be found in particular in FIGS. 4 and 5.

In geringem Abstand A bis zu maximal 5 mm von zumindest einem der weiteren metallischen Beläge 20 a (Fig. 4 und 5) ist auf dem Tragkörper 30 der Niederspannungswicklung 17 zumindest eine diese weiteren metallischen Beläge 20 a konzentrisch umgebende Ableitelektrode 22 a elektrisch isoliert angebracht. Die elektrische Isolierung zwischen dem metallischen Belag 20 a bzw. zwischen den metallischen Belägen 20 a und der bzw. den Ableitelektrode(n) 22 a ent­spricht bevorzugt der Ausführungsform, wie sie in Figur 2 näher beschrieben wurde. Auch beim Ausführungsbeispiel gemäß Figur 3 sind die Ableitelektrode bzw. Ableitelektro­den 22 a über eine oder mehrere Anschlußleitungen 27 a auf kürzestem Wege, also induktivitätsarm, mit der Abschirmelektrode 18 elektrisch leitend verbunden.At a short distance A up to a maximum of 5 mm from at least one of the further metallic coatings 20 a (FIGS. 4 and 5), at least one discharge electrode 22 a concentrically surrounding these further metallic coatings 20 a is attached to the support body 30 of the low-voltage winding 17 in an electrically insulated manner. The electrical insulation between the metallic coating 20 a or between the metallic coatings 20 a and the discharge electrode (s) 22 a preferably corresponds to the embodiment as was described in more detail in FIG. 2. Even in the embodiment According to FIG. 3, the lead electrode or lead electrodes 22 a are connected in an electrically conductive manner to the shielding electrode 18 via one or more connecting leads 27 a in the shortest way, that is to say with little inductance.

Die Verwendung von mehreren metallischen Belägen 20 a und entsprechend mehreren Ableitelektroden 22 a gemäß Figur 5 bietet den Vorteil einer größeren Kapazität zwischen diesen Belägen bzw. Elektroden.The use of a plurality of metallic coatings 20 a and correspondingly a plurality of lead electrodes 22 a according to FIG. 5 offers the advantage of a larger capacitance between these coatings or electrodes.

Claims (8)

1. Hochspannungsspannungswandler, insbesondere kombi­nierter Hochspannungsstrom- und -spannungswandler in Kopf­bauweise, mit einem auf Hochspannung liegenden Kern, den eine mit einem geschlitzten Metallschirm versehene Hochspannungswicklung koaxial umgibt und mit einer diese ebenfalls koaxial umgebenden Niederspannungswicklung, sowie mit einer die Hoch- und Niederspannungswicklung umgebenden, auf Erdpotential liegenden koaxialen Abschirm­elektrode, gekennzeichnet durch folgende Merkmale:
- der Metallschirm (20) ist mittels der Ausleitung (21) mit der Anschlußklemme (X) für die Hochspannungs­wicklung (16) verbunden;
- in geringem Abstand (A) bis zu maximal 5 mm von dem Metallschirm (20) entfernt ist eine diesen konzentrisch umgebende Ableitelektrode (22) zu dem Metallschirm (20) elektrisch isoliert angebracht;
- die Ableitelektrode (22) ist über eine oder mehrere Anschlußleitungen (27) auf kürzestem Wege, also induktivitätsarm mit der Abschirmelektrode (18) elektrisch leitend verbunden;
- die Niederspannungswicklung (17) ist ebenfalls mit einer üblicherweise geschlitzten metallischen Abschirmung (25) versehen, die ebenfalls induktivitätsarm mit der Abschirm­elektrode (18) elektrisch leitend verbunden ist.1.High-voltage converter, in particular a combined high-voltage current and voltage converter in a head design, with a high-voltage core, which is coaxially surrounded by a high-voltage winding provided with a slotted metal screen and with a low-voltage winding which also coaxially surrounds it, and with a high-voltage and low-voltage winding surrounding Coaxial shielding electrode at ground potential, characterized by the following features:
- The metal screen (20) is connected by means of the diversion (21) to the connection terminal (X) for the high-voltage winding (16);
- At a short distance (A) up to a maximum of 5 mm from the metal screen (20), a concentrically surrounding discharge electrode (22) is attached to the metal screen (20) in an electrically insulated manner;
- The discharge electrode (22) is connected in an electrically conductive manner to the shielding electrode (18) via one or more connecting lines (27) in the shortest way, that is to say with little inductance;
- The low-voltage winding (17) is also provided with a usually slotted metallic shield (25), which is also connected to the shielding electrode (18) in an electrically conductive manner with low inductance. 2. Hochspannungsspannungswandler nach Anspruch 1, dadurch gekennzeichnet, daß der Abstand (A) zwischen dem Metallschirm (20) und der Ableitelektrode (22) ganz oder teilweise durch mehrere Lagen aus einem band- oder folienförmigen Isoliermaterial (23) gebildet ist.2. High-voltage converter according to claim 1, characterized in that the distance (A) between the metal screen (20) and the discharge electrode (22) is wholly or partly formed by a plurality of layers of a strip or foil-shaped insulating material (23). 3. Hochspannungsspannungswandler nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Ableitelektrode (22) aus einer auf einem Isolierkörper aufgetragenen leitenden, in Richtung der Wicklungsachse (W) aufgetrennten Schicht besteht.3. High-voltage converter according to claim 1 or 2, characterized in that the discharge electrode (22) consists of a layer applied on an insulating body, in the direction of the winding axis (W) separated layer. 4. Hochspannungsspannungswandler nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Ableitelektrode (22) aus einem auf das Isoliermaterial (23) aufschiebbaren, in Richtung der Wicklungsachse (W) geschlitzten Metall­zylinder besteht.4. High-voltage converter according to claim 1 or 2, characterized in that the discharge electrode (22) consists of a metal cylinder which can be pushed onto the insulating material (23) and is slotted in the direction of the winding axis (W). 5. Hochspannungsspannungswandler nach Anspruch 4, dadurch gekennzeichnet, daß der Metallzylinder auf dem Isoliermaterial (23) aufgeklebt und/oder durch eine äußere, isolierende Bandagenwicklung auf dem Isolier­material (23) des Metallschirmes (20) befestigt ist.5. High-voltage converter according to claim 4, characterized in that the metal cylinder is glued to the insulating material (23) and / or is secured by an outer, insulating bandage winding on the insulating material (23) of the metal screen (20). 6. Hochspannungsspannungswandler nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Ausleitung (21) für die Anschlußklemme (X) der Hoch­spannungswicklung (16) gegenüber dem Gehäuse (19) und den Ausleitungen (28, 29) der Niederspannungswicklung (17) isoliert zu einem gemeinsamen Klemmenbrett (2) geführt ist.6. High-voltage converter according to one of claims 1 to 5, characterized in that the lead (21) for the connecting terminal (X) of the high-voltage winding (16) relative to the housing (19) and the leads (28, 29) of the low-voltage winding (17) is isolated to a common terminal board (2). 7. Hochspannungsspannungswandler nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß er unter dem Druck eines isolierenden Gases steht.7. High-voltage converter according to one of claims 1 to 6, characterized in that it is under the pressure of an insulating gas. 8. Hochspannungsspannungswandler, insbesondere kombi­nierter Hochspannungsstrom- und spannungswandler in Kopf­bauweise, mit einem auf Hochspannung liegenden Kern, den eine mit einem geschlitzten Metallschirm versehene Hoch­spannungswicklung koaxial umgibt und mit einer diese ebenfalls koaxial umgebenden Niederspannungswicklung, sowie mit einer die Hoch- und Niederspannungswicklung umgebenden, auf Erdpotential liegenden koaxialen Abschirmelektrode, gekennzeichnet, durch folgende Merkmale:
- der Metallschirm (20) der Hochspannungswicklung (16) ist mit zumindest einem weiteren metallischen Be­lag (20 a) auf dem Tragkörper (30) der Nieder­spannungswicklung (17) elektrisch leitend kontaktiert und mittels der Ausleitung (21) mit der Anschluß­klemme (X) für die Hochspannungswicklung (16) ver­bunden;
- in geringem Abstand (A) bis zu maximal 5 mm von zumindest einem der weiteren metallischen Beläge (20 a) auf der Niederspannungswicklung (17) entfernt ist zumindest eine diese konzentrisch umgebende Ableitelektrode (22 a) elektrisch isoliert angebracht;
- die Ableitelektrode(n) (22 a) ist bzw. sind über eine oder mehrere Anschlußleitungen (27 a) auf kürzestem Wege, also induktivitätsarm, mit der Abschirmelektrode (18) elektrisch leitend verbunden.8.High-voltage converter, in particular combined high-voltage current and voltage converter in head design, with a high-voltage core, which coaxially surrounds a high-voltage winding provided with a slotted metal screen and with a low-voltage winding which also coaxially surrounds it, as well as with a surrounding the high and low-voltage winding Coaxial shielding electrode with earth potential, characterized by the following features:
- The metal screen (20) of the high-voltage winding (16) is electrically conductively contacted with at least one further metallic coating (20 a) on the supporting body (30) of the low-voltage winding (17) and by means of the diversion (21) with the connecting terminal (X) for the high voltage winding (16) connected;
- At a short distance (A) up to a maximum of 5 mm from at least one of the other metallic coatings (20 a) on the low-voltage winding (17), at least one concentrically surrounding discharge electrode (22 a) is attached in an electrically insulated manner;
- The discharge electrode (s) (22 a) is or are electrically conductively connected to the shielding electrode (18) via one or more connecting lines (27 a) by the shortest route, ie with little inductance.
EP88117960A 1987-11-09 1988-10-28 High-voltage potential tranformer Expired - Lifetime EP0315835B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88117960T ATE85725T1 (en) 1987-11-09 1988-10-28 HIGH VOLTAGE VOLTAGE CONVERTER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3737989A DE3737989C1 (en) 1987-11-09 1987-11-09 High voltage converter
DE3737989 1987-11-09

Publications (2)

Publication Number Publication Date
EP0315835A1 true EP0315835A1 (en) 1989-05-17
EP0315835B1 EP0315835B1 (en) 1993-02-10

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EP88117960A Expired - Lifetime EP0315835B1 (en) 1987-11-09 1988-10-28 High-voltage potential tranformer

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US (1) US4845453A (en)
EP (1) EP0315835B1 (en)
JP (1) JP2693188B2 (en)
KR (1) KR0127019B1 (en)
CN (1) CN1020018C (en)
AR (1) AR244019A1 (en)
AT (1) ATE85725T1 (en)
AU (1) AU601135B2 (en)
BR (1) BR8805790A (en)
CA (1) CA1303693C (en)
DD (1) DD283474A5 (en)
DE (2) DE3737989C1 (en)
ES (1) ES2040308T3 (en)
HU (1) HU200029B (en)
IN (1) IN171971B (en)
RU (1) RU2046427C1 (en)
TR (1) TR24104A (en)
UA (1) UA25892A1 (en)
YU (1) YU47634B (en)
ZA (1) ZA888251B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104576006A (en) * 2015-01-08 2015-04-29 大连第二互感器集团有限公司 Current transformer being able to reduce local discharge and manufacturing method thereof

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR8700893A (en) * 1986-03-13 1987-12-22 Messwandler Bau Ag COMBINED HIGH VOLTAGE AND HIGH VOLTAGE CURRENT TRANSFORMER
DE3737989C1 (en) * 1987-11-09 1989-05-11 Messwandler Bau Ag High voltage converter
CH682190A5 (en) * 1991-04-22 1993-07-30 Asea Brown Boveri
JPH0992127A (en) * 1995-09-19 1997-04-04 Hitachi Ltd Earth leakage breaker
WO2007067999A2 (en) * 2005-12-09 2007-06-14 Amnis Corporation Extended depth of field imaging for high speed object analysis
WO2010061399A1 (en) * 2008-11-27 2010-06-03 Areva T&D India Ltd. A current transformer
CN101982858A (en) * 2010-10-13 2011-03-02 中国人民解放军国防科学技术大学 Reactor for maglev train
CN102737828B (en) * 2011-04-13 2015-08-26 华东电力试验研究院有限公司 With the capacitance type potential transformer of transient over-voltage monitoring unit
DE102015216860A1 (en) * 2015-09-03 2017-03-09 Siemens Aktiengesellschaft Rim electrode and winding arrangement of a transducer
DE102016216499B4 (en) * 2016-09-01 2018-04-19 Siemens Aktiengesellschaft Voltage transformer unit with an active part housing
PL3559963T3 (en) * 2016-12-21 2022-02-07 Abb Power Grids Switzerland Ag Combined instrument transformer for hv applications.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE699987C (en) * 1934-09-30 1940-12-11 Aeg High voltage transformer, especially voltage converter
US3028569A (en) * 1959-08-31 1962-04-03 Gen Electric Open core potential transformer
DE1227140B (en) * 1962-09-26 1966-10-20 Siemens Ag Voltage converter with a rod core
DE1438666A1 (en) * 1962-10-26 1969-12-04 Westinghouse Electric Corp Inductive electrical device
DE2452056A1 (en) * 1974-11-02 1976-05-20 Messwandler Bau Gmbh INDUCTIVE VOLTAGE CONVERTER FOR A METAL ENCLOSED HIGH VOLTAGE SWITCHGEAR FULLY INSULATED WITH INSULATING GAS
EP0236974A2 (en) * 1986-03-13 1987-09-16 Mwb Messwandler-Bau Ag Combined current and voltage transformer for a high-voltage installation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2170048A (en) * 1935-03-20 1939-08-22 Edison Inc Thomas A Coupled circuit system
US3699488A (en) * 1972-02-28 1972-10-17 Allis Chalmers Distribution transformer having static shield
DE3608390A1 (en) * 1986-03-13 1987-09-17 Messwandler Bau Ag Combined high-voltage current transformer and voltage converter
DE3737989C1 (en) * 1987-11-09 1989-05-11 Messwandler Bau Ag High voltage converter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE699987C (en) * 1934-09-30 1940-12-11 Aeg High voltage transformer, especially voltage converter
US3028569A (en) * 1959-08-31 1962-04-03 Gen Electric Open core potential transformer
DE1227140B (en) * 1962-09-26 1966-10-20 Siemens Ag Voltage converter with a rod core
DE1438666A1 (en) * 1962-10-26 1969-12-04 Westinghouse Electric Corp Inductive electrical device
DE2452056A1 (en) * 1974-11-02 1976-05-20 Messwandler Bau Gmbh INDUCTIVE VOLTAGE CONVERTER FOR A METAL ENCLOSED HIGH VOLTAGE SWITCHGEAR FULLY INSULATED WITH INSULATING GAS
EP0236974A2 (en) * 1986-03-13 1987-09-16 Mwb Messwandler-Bau Ag Combined current and voltage transformer for a high-voltage installation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104576006A (en) * 2015-01-08 2015-04-29 大连第二互感器集团有限公司 Current transformer being able to reduce local discharge and manufacturing method thereof

Also Published As

Publication number Publication date
US4845453A (en) 1989-07-04
ZA888251B (en) 1989-08-30
HUT49746A (en) 1989-10-30
KR890008865A (en) 1989-07-12
AU601135B2 (en) 1990-08-30
TR24104A (en) 1991-03-18
JPH01258405A (en) 1989-10-16
ATE85725T1 (en) 1993-02-15
CA1303693C (en) 1992-06-16
YU201588A (en) 1991-02-28
HU200029B (en) 1990-03-28
YU47634B (en) 1995-12-04
AU2479788A (en) 1989-05-11
BR8805790A (en) 1989-08-01
DD283474A5 (en) 1990-10-10
KR0127019B1 (en) 1998-04-02
CN1036477A (en) 1989-10-18
DE3737989C1 (en) 1989-05-11
CN1020018C (en) 1993-03-03
ES2040308T3 (en) 1993-10-16
JP2693188B2 (en) 1997-12-24
IN171971B (en) 1993-02-27
AR244019A1 (en) 1993-09-30
EP0315835B1 (en) 1993-02-10
UA25892A1 (en) 1999-02-26
DE3878404D1 (en) 1993-03-25
RU2046427C1 (en) 1995-10-20

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