EP0315835B1 - High-voltage potential tranformer - Google Patents

High-voltage potential tranformer Download PDF

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Publication number
EP0315835B1
EP0315835B1 EP88117960A EP88117960A EP0315835B1 EP 0315835 B1 EP0315835 B1 EP 0315835B1 EP 88117960 A EP88117960 A EP 88117960A EP 88117960 A EP88117960 A EP 88117960A EP 0315835 B1 EP0315835 B1 EP 0315835B1
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EP
European Patent Office
Prior art keywords
voltage
winding
low
electrode
metal screen
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EP88117960A
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German (de)
French (fr)
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EP0315835A1 (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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    • 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 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 winding 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 own DE-A-36 08 390.9, in which the voltage transformer is arranged above the current transformer.
  • 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.
  • a combined high-voltage current and voltage converter is shown. 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.
  • 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 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 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 the occurrence of short-circuit currents.
  • 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 attach 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 a grounded 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 electrically conductively connected to the shielding electrode 18, which is connected to earth potential, via a, preferably a plurality of connecting brackets 26 distributed over the circumference, with little 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 the case of transient, high-frequency processes as a result of coupling in to high potential to the 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 identified with the same reference numbers as in FIG. 2.
  • the metal shield 20 of the high-voltage winding 16 is electrically conductively contacted by means of electrically conductive connection elements 20 b distributed over the circumference of the high-voltage winding 16 with at least one further metallic coating 20 a on the support body 30 of the low-voltage winding 17 and by means of the lead 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.

Description

Die vorliegende Erfindung bezieht sich auf einen Hochspannungs-Spannungswandler, insbesondere kombinierten Hochspannungs-Strom- und -Spannungswandler in Kopfbauweise, gemäß den Oberbegriffen der Ansprüche 1 und 8.The present invention relates to a high-voltage 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 Hochspannungs-Spannungswandler 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 Hochspannungs-Strom- und -Spannungswandler in der Bauweise gemäß der eigenen DE-A-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 with a head design, it is customary to mount the active parts of the converter consisting of core, high and low voltage winding 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 own DE-A-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.As a result of the large spacing due to the necessary fastening elements for the low-voltage winding between the metal shield of the high-voltage winding and 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 Hochspannungs-Spannungswandler, insbesondere einen kombinierten Hochspannungs-Strom- 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.It is accordingly an object of the present invention to improve a high-voltage 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 injections, in particular triggered by high-frequency, transient switching processes, on the secondary side of the converter, especially 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 Hochspannungs-Strom- und -Spannungswandler in Kopfbauweise im Schnitt,
Fig. 2
einen Hochspannungs-Spannungswandler, insbesondere für den Einsatz eines kombinierten Wandlers gemäß Fig. 1 als Teilausschnitt im Schnitt,
Fig. 3
eine Abwandlung des Hochspannungs-Spannungswandlers 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:
Fig. 1
a combined high-voltage current and voltage converter in head design on average,
Fig. 2
a high-voltage converter, in particular for the use of a combined converter according to FIG. 1 as a partial section in section,
Fig. 3
a modification of the high-voltage converter according to FIG. 2,
4 and 5
schematic representations of the shields and lead electrodes used in the exemplary embodiment according to FIG. 3.

In Figur 1 ist ein kombinierter Hochspannungs-Strom- 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.In Figure 1, a combined high-voltage current and voltage converter is shown. 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 Hochspannungs-Stromwandler, 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 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 Hochspannungs-Stromwandler 6, 10 ist ein Hochspannungs-Spannungswandler 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 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 Hochspannungs-Strom- 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 the occurrence of short-circuit currents. 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 Hochspannungs-Strom- 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 attach 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 geerdeten 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 a grounded 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 electrically conductively connected to the shielding electrode 18, which is connected to earth potential, via a, preferably a plurality of connecting brackets 26 distributed over the circumference, with little 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 Metallschirm 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 the case of transient, high-frequency processes as a result of coupling in to high potential to the 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 Hochspanungs-Spannungswandlers 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 identified with the same reference numbers as in FIG. 2.

In Abänderung des Hochspannungs-Spannungswandlers 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 shield 20 of the high-voltage winding 16 is electrically conductively contacted by means of electrically conductive connection elements 20 b distributed over the circumference of the high-voltage winding 16 with at least one further metallic coating 20 a on the support body 30 of the low-voltage winding 17 and by means of the lead 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. A high-voltage voltage transformer, in particular a combined high-voltage current and voltage transformer of head construction, having a core (15) which is at high voltage and is surrounded coaxially by a high-voltage winding (16) provided with a slit metal screen (20) and having a low-voltage winding (17) which likewise surrounds the latter coaxially, as well as having a coaxial screening electrode (18) which is at earth potential and surrounds the high and low voltage windings, characterized by the following features:
    - the metal screen (20) is connected by means of the lead-out (21) to the terminal (X) for the high-voltage winding (16);
    - at a short distance (A) of up to a maximum of 5 mm away from the metal screen (20) is fitted a leakage electrode (22) which is electrically insulated from the metal screen (20) and surrounds it concentrically;
    - the leakage electrode (22) is electrically connected via one or more connecting leads (27) by the shortest path, that is, with low inductance, to the screening electrode (18);
    - the low-voltage winding (17) is likewise provided with a metallic screening (25) slit in the usual way, which is likewise electrically connected with low inductance to the screening electrode (18).
  2. A high-voltage voltage transformer as in Claim 1,
       characterized in that the distance (A) between the metal screen (20) and the leakage electrode (22) is formed wholly or partially by a number of layers of insulating material (23) in the form of tape or foil.
  3. A high-voltage voltage transformer as in Claim 1 or 2,
       characterized in that the leakage electrode (22) consists of a conductive layer applied to an insulating body and interrupted in the direction of the axis (W) of the winding.
  4. A high-voltage voltage transformer as in Claim 1 or 2,
       characterized in that the leakage electrode (22) consists of a metal cylinder slit in the direction of the axis (W) of the winding, which may be slipped over the insulating material (23).
  5. A high-voltage voltage transformer as in Claim 4,
    characterized in that the metal cylinder is glued onto the insulating material (23) and/or fastened by an outer insulating bandage winding onto the insulating material (23) of the metal screen (20).
  6. A high-voltage voltage transformer as in one of the Claims 1 to 5,
       characterized in that the lead-out (21) for the terminal (X) of the high-voltage winding (16) is insulated from the housing (19) and from the leads out (28, 29) from the low-voltage winding (17) and is led to a common terminal board (2).
  7. A high-voltage voltage transformer as in one of the Claims 1 to 6,
       characterized in that it is under pressure from an insulating gas.
  8. A high-voltage voltage transformer, in particular a combined high-voltage current and voltage transformer of head construction, having a core (15) which is at high voltage and is surrounded coaxially by a high-voltage winding (16) provided with a slit metal screen (20) and having a low-voltage winding (17) which likewise surrounds the latter coaxially, as well as having a coaxial screening electrode (18) which is at earth potential and surrounds the high and low voltage windings, characterized by the following features:
    - the metal screen (20) of the high-voltage winding (16) is in electrically conductive contact with at least one further metallic coating (20a) on the carrier body (30) of the low-voltage winding (17) and is connected by means of the lead-out (21) to the terminal (X) for the high-voltage winding (16);
    - at a short distance (A) of up to a maximum of 5 mm away from at least one of the further metallic coatings (20a) on the low-voltage winding (17) is fitted at least one leakage electrode (22a) which is electrically insulated from the said metallic coating and surrounds it concentrically;
    - the leakage electrode(s) (22a) is/are electrically connected via one or more connecting leads (27a) by the shortest path, that is, with low inductance, to the screening electrode (18).
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
DE3737989 1987-11-09
DE3737989A DE3737989C1 (en) 1987-11-09 1987-11-09 High voltage converter

Publications (2)

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

Family

ID=6340108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88117960A Expired - Lifetime EP0315835B1 (en) 1987-11-09 1988-10-28 High-voltage potential tranformer

Country Status (20)

Country Link
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)

Families Citing this family (12)

* 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
US8005314B2 (en) * 2005-12-09 2011-08-23 Amnis Corporation Extended depth of field imaging for high speed object analysis
US20120092115A1 (en) * 2008-11-27 2012-04-19 Mohan Srinivasrao 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
CN104576006B (en) * 2015-01-08 2016-09-28 大连第二互感器集团有限公司 A kind of current transformer that can reduce shelf depreciation and manufacture method thereof
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.

Family Cites Families (10)

* 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
US2170048A (en) * 1935-03-20 1939-08-22 Edison Inc Thomas A Coupled circuit system
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
US3173115A (en) * 1962-10-26 1965-03-09 Westinghouse Electric Corp High voltage potential transformer
US3699488A (en) * 1972-02-28 1972-10-17 Allis Chalmers Distribution transformer having static shield
DE2452056B2 (en) * 1974-11-02 1978-02-09 Messwandler-Bau Gmbh, 8600 Bamberg INDUCTIVE VOLTAGE CONVERTER FOR A METAL ENCLOSED HIGH VOLTAGE SWITCHGEAR FULLY INSULATED WITH INSULATING GAS
BR8700893A (en) * 1986-03-13 1987-12-22 Messwandler Bau Ag COMBINED HIGH VOLTAGE AND HIGH VOLTAGE CURRENT TRANSFORMER
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

Also Published As

Publication number Publication date
ES2040308T3 (en) 1993-10-16
AU601135B2 (en) 1990-08-30
US4845453A (en) 1989-07-04
HUT49746A (en) 1989-10-30
AU2479788A (en) 1989-05-11
IN171971B (en) 1993-02-27
HU200029B (en) 1990-03-28
DE3737989C1 (en) 1989-05-11
RU2046427C1 (en) 1995-10-20
CA1303693C (en) 1992-06-16
KR0127019B1 (en) 1998-04-02
YU201588A (en) 1991-02-28
AR244019A1 (en) 1993-09-30
ZA888251B (en) 1989-08-30
JPH01258405A (en) 1989-10-16
YU47634B (en) 1995-12-04
TR24104A (en) 1991-03-18
KR890008865A (en) 1989-07-12
DD283474A5 (en) 1990-10-10
JP2693188B2 (en) 1997-12-24
EP0315835A1 (en) 1989-05-17
DE3878404D1 (en) 1993-03-25
CN1036477A (en) 1989-10-18
BR8805790A (en) 1989-08-01
ATE85725T1 (en) 1993-02-15
UA25892A1 (en) 1999-02-26
CN1020018C (en) 1993-03-03

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