EP3796346A1 - Compensation block for air choke coils and transformers - Google Patents

Compensation block for air choke coils and transformers Download PDF

Info

Publication number
EP3796346A1
EP3796346A1 EP19198956.5A EP19198956A EP3796346A1 EP 3796346 A1 EP3796346 A1 EP 3796346A1 EP 19198956 A EP19198956 A EP 19198956A EP 3796346 A1 EP3796346 A1 EP 3796346A1
Authority
EP
European Patent Office
Prior art keywords
block
compensating
air choke
choke coil
air
Prior art date
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.)
Pending
Application number
EP19198956.5A
Other languages
German (de)
French (fr)
Inventor
Peter GRIEBLER
Klaus Pointner
Helmut Reisinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Energy Global GmbH and Co KG
Original Assignee
Siemens Energy Global GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Energy Global GmbH and Co KG filed Critical Siemens Energy Global GmbH and Co KG
Priority to EP19198956.5A priority Critical patent/EP3796346A1/en
Priority to PCT/EP2020/074201 priority patent/WO2021058229A1/en
Priority to CN202080074476.3A priority patent/CN114631160A/en
Priority to BR112022005367A priority patent/BR112022005367A2/en
Priority to US17/762,818 priority patent/US20220344094A1/en
Publication of EP3796346A1 publication Critical patent/EP3796346A1/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00
    • H01F37/005—Fixed inductances not covered by group H01F17/00 without magnetic core
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support

Definitions

  • Dry-insulated air reactors are used, for example, in electrical systems for energy transmission and in power supply systems of industrial plants in order to protect these systems or to increase their performance.
  • current limiting chokes are used to limit short-circuit currents in areas of power networks which, due to their low network impedance, have very high short-circuit currents in the event of a fault, such as in substations in the area of multi-fed busbars.
  • the task of the series-connected current-limiting chokes is to limit the short-circuit power through the additional impedance in power networks so that circuit breakers can safely interrupt the short-circuit current in the event of a fault.
  • a typical air choke coil like the one in the WO 2009/126977 is described, has concentric winding layers, which are held at their upper and lower axial ends by a holding star, which is composed of several star-shaped, radially arranged arms, so-called star leaves.
  • a large number of individual star blades can be used, which are only located in the area below and above the winding layers, in order to save star blade material.
  • the opposing holding stars or star leaves are tensioned against one another with the aid of spacer strips or tension bandages running between the winding layers in order to hold the winding layers.
  • the star blades and spacer bars are used as winding aids at the same time by first clamping the lower star blades on a rotating device and then building the winding layers on top, with a set of spacer bars being mounted in between
  • the invention is therefore based on the object of improving the structure of air choke coils in such a way that the formation of gaps due to settlement can be reduced.
  • the current limiting choke according to Fig. 1 has concentrically arranged windings reinforced with glass fiber reinforced epoxy resin, of which only the outer winding layer is visible.
  • the windings are fixed by star holders, the arms of which extend in the radial direction from the coil axis beyond the radius of the outer winding.
  • a compensation block is now inserted between one winding end and an upper star arm of the air choke coil.
  • this compensation block has a sandwich structure with an upper block of insulating material, a lower block of insulating material and an elastomer block lying in between.
  • the star arms have a rectangular recess, the width of which corresponds to the width of the compensation blocks and the height of which corresponds to part of the height of the upper insulating material block of the compensation blocks.
  • the compensating blocks have a groove for receiving the section of the star arms above the rectangular recess.
  • This positive connection fixes the compensation blocks in their position and prevents them from slipping.
  • the tensioning device can consist, for example, of threaded pins which protrude through the sandwich structure of the compensating block and press the compensating blocks together by means of screws.
  • clamping devices based on clamps, riveted connections or with snap locks are also conceivable.
  • the preferred use of the compensating blocks according to the invention relates to air choke coils, but it is also possible for the windings of transformers.

Abstract

Die Erfindung betrifft einen Ausgleichsblock für Luftdrosselspulen und Transformatoren, wobei der Ausgleichsblock eine Sandwichstruktur mit einem oberen Isolierstoffblock, einem unteren Isolierstoffblock und einen dazwischen liegenden Elastomerblock umfaßt.The invention relates to a compensation block for air reactors and transformers, the compensation block comprising a sandwich structure with an upper block of insulating material, a lower block of insulating material and an elastomer block lying in between.

Mit den erfindungsgemäßen Ausgleichsblock kann eine Spaltbildungen durch Setzungen reduziert werden.

Figure imgaf001
With the compensation block according to the invention, the formation of gaps due to settlement can be reduced.
Figure imgaf001

Description

Trockenisolierte Luftdrosselspulen werden beispielsweise in elektrischen Systemen zur Energieübertragung und in Stromversorgungssystemen von Industrieanlagen eingesetzt, um diese Systeme zu schützen oder um deren Leistungsfähigkeit zu erhöhen.Dry-insulated air reactors are used, for example, in electrical systems for energy transmission and in power supply systems of industrial plants in order to protect these systems or to increase their performance.

Da keine Isolieröle zum Einsatz kommen, sind sie umweltfreundlich und es gibt kein erhöhtes Risiko durch Brandgefahr. Darüber hinaus sind trockenisolierte Luftdrosselspulen weitgehend wartungsfrei.Since no insulating oils are used, they are environmentally friendly and there is no increased risk of fire. In addition, dry-insulated air choke coils are largely maintenance-free.

Als Strombegrenzungsdrossel dienen sie zur Begrenzung von Kurzschlussströmen in Bereichen von Stromnetzen, welche durch ihre niedrige Netzimpedanz im Fehlerfall sehr hohe Kurzschlussströme aufweisen wie beispielsweise in Umspannwerken im Bereich von mehrfach gespeisten Sammelschienen.As current limiting chokes, they are used to limit short-circuit currents in areas of power networks which, due to their low network impedance, have very high short-circuit currents in the event of a fault, such as in substations in the area of multi-fed busbars.

Die Aufgabe der in Reihe geschalteten Strombegrenzungsdrosseln besteht dabei darin, durch die zusätzlich eingebrachte Impedanz in Stromnetzen die Kurzschlussleistung so zu begrenzen, dass Leistungsschalter den Kurzschlussstrom im Fehlerfall sicher unterbrechen können.The task of the series-connected current-limiting chokes is to limit the short-circuit power through the additional impedance in power networks so that circuit breakers can safely interrupt the short-circuit current in the event of a fault.

Weiterhin werden sie beispielsweise bei Hochspannungsgleichstromübertragungsanlagen als Glättungsdrosseln eingesetzt.They are also used, for example, in high-voltage direct current transmission systems as smoothing reactors.

Eine typische Luftdrosselspule, wie sie in der WO 2009/126977 beschrieben ist, weist konzentrische Wicklungslagen auf, welche an ihren oberen und unteren axialen Enden jeweils von einem Haltestern gehalten werden, der sich aus mehreren sternförmig radial angeordneten Armen, sog. Sternblättern, zusammensetzt.A typical air choke coil like the one in the WO 2009/126977 is described, has concentric winding layers, which are held at their upper and lower axial ends by a holding star, which is composed of several star-shaped, radially arranged arms, so-called star leaves.

Anstelle eines einteiligen Haltesterns kann jeweils auch eine Vielzahl einzelner Sternblätter verwendet werden, die nur im Bereich unter und über den Wicklungslagen liegen, um Sternblattmaterial einzusparen. Die einander gegenüberliegenden Haltesterne bzw. Sternblätter werden dabei mithilfe von zwischen den Wicklungslagen verlaufenden Abstandshalteleisten oder Zugbandagen gegeneinander gespannt, um die Wicklungslagen zu halten.Instead of a one-piece holding star, a large number of individual star blades can be used, which are only located in the area below and above the winding layers, in order to save star blade material. The opposing holding stars or star leaves are tensioned against one another with the aid of spacer strips or tension bandages running between the winding layers in order to hold the winding layers.

Beim Wickeln der Spule werden die Sternblätter und Abstandshalteleisten gleichzeitig als Wickelhilfen verwendet, indem zunächst die unteren Sternblätter auf einer Drehvorrichtung aufgespannt und dann darauf die Wicklungslagen aufgebaut werden, wobei dazwischen jeweils ein Satz Abstandshalteleisten montiert wirdWhen winding the coil, the star blades and spacer bars are used as winding aids at the same time by first clamping the lower star blades on a rotating device and then building the winding layers on top, with a set of spacer bars being mounted in between

Aus der EP 2973 621 B1 ist es bekannt, zum Ausgleich unterschiedlicher Bauhöhen der einzelnen Wicklungslagen aufgrund unterschiedlicher Leiterquerschnitte einen Wicklungslagen-Steigungsausgleich vorzusehen, bei dem zwischen den einander axial gegenüberliegenden Sternblättern und der zwischenliegenden Wicklungslage Ausgleichsblätter eingelegt werden, welche die Wicklungslagen gegenüber den Sternblättern abstützen und in Axialrichtung zentrieren.From the EP 2973 621 B1 It is known to provide a winding layer pitch compensation to compensate for different heights of the individual winding layers due to different conductor cross-sections, in which compensating sheets are inserted between the axially opposite star blades and the intermediate winding layer, which support the winding layers against the star blades and center them in the axial direction.

Nach dem Herstellungsvorgang und im Betrieb der Luftdrosselspulen kommt es aufgrund thermischer und mechanischer Betriebslasten zu einer Setzung der Wicklungskörper und damit zu Spaltbildungen, vor allem an den Wicklungsenden.After the manufacturing process and during operation of the air choke coils, thermal and mechanical operating loads cause the winding bodies to settle and thus to form gaps, especially at the winding ends.

Diese Spalten müssen aufwändig mit geeignetem Füllmaterial ausgeglichen werden, was im laufenden Betrieb zu vorübergehenden Abschaltungen der Anlage führt.These gaps have to be compensated for with suitable filling material, which leads to temporary shutdowns of the system during operation.

Der Erfindung liegt daher die Aufgabe zugrunde, den Aufbau von Luftdrosselspulen so zu verbessern, dass Spaltbildungen durch Setzungen reduziert werden können.The invention is therefore based on the object of improving the structure of air choke coils in such a way that the formation of gaps due to settlement can be reduced.

Erfindungsgemäß geschieht dies mit einem Ausgleichsblock gemäß Anspruch 1.According to the invention this is done with a compensation block according to claim 1.

Vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen.Advantageous refinements result from the subclaims.

Die Erfindung wird anhand von Figuren näher erläutert.The invention is explained in more detail with reference to figures.

Es zeigen beispielhaft:

  • Fig.1 eine Strombegrenzungsdrossel mit konzentrisch angeordneten Wicklungen, die mittels glasfaserverstärktem Epoxidharz verstärkt worden sind.
  • Fig.2 eine Detailansicht eines oberen Wicklungsendes mit einem erfindungsgemäßen Ausgleichsblock.
  • Fig.3 einen Arm eines Sternhalters mit einem erfindungsgemäßen Ausgleichsblock und
  • Fig.4 einen Arm eines Sternhalters mit einem erfindungsgemäßen Ausgleichsblock während des Montagevorgangs.
It shows by way of example:
  • Fig. 1 a current limiting choke with concentrically arranged windings that have been reinforced with glass fiber reinforced epoxy resin.
  • Fig. 2 a detailed view of an upper end of the winding with a compensating block according to the invention.
  • Fig. 3 an arm of a star holder with a compensating block according to the invention and
  • Fig. 4 an arm of a star holder with a compensating block according to the invention during the assembly process.

Die Strombegrenzungsdrossel gemäß Fig.1 weist konzentrisch angeordnete, mittels glasfaserverstärktem Epoxidharz verstärkte Wicklungen auf, von denen lediglich die äußere Wicklungslage sichtbar ist.The current limiting choke according to Fig. 1 has concentrically arranged windings reinforced with glass fiber reinforced epoxy resin, of which only the outer winding layer is visible.

An den oberen und unteren Enden werden die Wicklungen durch Sternhalter fixiert, deren Arme sich in radialer Richtung von der Spulenachse über den Radius der äußeren Wicklung hinaus erstrecken.At the upper and lower ends, the windings are fixed by star holders, the arms of which extend in the radial direction from the coil axis beyond the radius of the outer winding.

Erfindungsgemäß wird nun zwischen ein Wicklungsende und einem oberen Sternarm der Luftdrosselspule ein Ausgleichsblock eingefügt.According to the invention, a compensation block is now inserted between one winding end and an upper star arm of the air choke coil.

Wie aus den Figuren 2, 3 und 4 ersichtlich, weist dieser Ausgleichsblock eine Sandwichstruktur mit einem oberen Isolierstoffblock, einem unteren Isolierstoffblock und einen dazwischen liegenden Elastomerblock auf.As from the Figures 2 , 3 and 4 As can be seen, this compensation block has a sandwich structure with an upper block of insulating material, a lower block of insulating material and an elastomer block lying in between.

Dabei ist es vorteilhaft, wenn die oberen Sternarme der Luftdrosselspule und die Ausgleichsblöcke mittels Kammverbindung formschlüssig verbunden sind.It is advantageous if the upper star arms of the air throttle coil and the compensating blocks are positively connected by means of a comb connection.

Dazu weisen die Sternarme ein rechteckige Ausnehmung auf, deren Breite der Breite der Ausgleichsblöcke entspricht und deren Höhe einem Teil der Höhe des oberen Isolierstoffblocks der Ausgleichsblöcke entspricht.For this purpose, the star arms have a rectangular recess, the width of which corresponds to the width of the compensation blocks and the height of which corresponds to part of the height of the upper insulating material block of the compensation blocks.

Die Ausgleichsblöcke weisen als Gegenstück eine Nut zur Aufnahme des Abschnitts der Sternarme oberhalb der rechteckigen Ausnehmung auf.As a counterpart, the compensating blocks have a groove for receiving the section of the star arms above the rectangular recess.

Durch diese formschlüssige Verbindung werden die Ausgleichsblöcke in ihrer Lage fixiert und ein Verrutschen verhindert.This positive connection fixes the compensation blocks in their position and prevents them from slipping.

Die Montage der Ausgleichsblöcke geschieht wie folgt:

  • der Ausgleichsblock wird mittels Spannvorrichtung komprimiert;
  • er wird in die vorgesehene Position zwischen einem Wicklungsende und einem oberen Sternarm der Luftdrosselspule eingefügt, die Spannvorrichtung wird gelöst.
The assembly of the compensation blocks is done as follows:
  • the compensation block is compressed by means of a clamping device;
  • it is inserted into the intended position between one end of the winding and an upper star arm of the air choke coil; the clamping device is released.

Die Spannvorrichtung kann beispielsweise aus Gewindestiften bestehen, welche durch die Sandwichstruktur des Ausgleichsblocks hindurchragen und mittels Schrauben die Ausgleichsblöcke zusammenpressen.The tensioning device can consist, for example, of threaded pins which protrude through the sandwich structure of the compensating block and press the compensating blocks together by means of screws.

Alternativ sind auch Spannvorrichtungen auf Basis von Klammern, Nietverbindungen oder mit Schnappverschlüssen denkbar. Der bevorzugte Einsatz der erfindungsgemäßen Ausgleichsblöcke betrifft Luftdrosselspulen, er ist aber auch für Wicklungen von Transformatoren möglich.Alternatively, clamping devices based on clamps, riveted connections or with snap locks are also conceivable. The preferred use of the compensating blocks according to the invention relates to air choke coils, but it is also possible for the windings of transformers.

BezugszeichenlisteList of reference symbols

11
äußere Wicklungslageouter winding layer
22
Arm des oberen SternhaltersArm of the upper star holder
33
AusgleichsblockCompensation block
44th
Oberer IsolierstoffblockUpper block of insulating material
55
ElastomerblockElastomer block
66th
unterer Isolierstoffblocklower block of insulating material
77th
SpannvorrichtungJig

Claims (4)

Ausgleichsblock für Luftdrosselspulen und Transformatoren, dadurch gekennzeichnet, dass der Ausgleichsblock eine Sandwichstruktur mit einem oberen Isolierstoffblock, einem unteren Isolierstoffblock und einen dazwischen liegenden Elastomerblock umfaßt.Compensating block for air reactors and transformers, characterized in that the compensating block comprises a sandwich structure with an upper block of insulating material, a lower block of insulating material and an elastomer block lying in between. Luftdrosselspule mit einem Ausgleichsblock nach Anspruch 1, dadurch gekennzeichnet, dass der Ausgleichsblock zwischen ein Wicklungsende und einem oberen Sternarm der Luftdrosselspule angeordnet ist.Air choke coil with a compensating block according to Claim 1, characterized in that the compensating block is arranged between a winding end and an upper star arm of the air choke coil. Luftdrosselspule mit einem Ausgleichsblock nach Anspruch 2, dadurch gekennzeichnet, dass die oberen Sternarme der Luftdrosselspule und die Ausgleichsblöcke mittels Kammverbindung formschlüssig verbunden sind.Air choke coil with a compensating block according to Claim 2, characterized in that the upper star arms of the air choke coil and the compensating blocks are positively connected by means of a comb connection. Verfahren zur Montage eines Ausgleichsblocks in einer Luftdrosselspule nach einem der Ansprüche 2 oder 3, mit folgenden Verfahrensschritten. - der Ausgleichsblock wird mittels Spannvorrichtung komprimiert wird, - er wird in die vorgesehene Position zwischen einem Wicklungsende und einem oberen Sternarm der Luftdrosselspule eingefügt, - die Spannvorrichtung wird gelöst. Method for mounting a compensating block in an air choke coil according to one of Claims 2 or 3, with the following method steps. - the compensation block is compressed by means of a clamping device, - it is inserted in the intended position between one end of the winding and an upper star arm of the air choke coil, - the clamping device is released.
EP19198956.5A 2019-09-23 2019-09-23 Compensation block for air choke coils and transformers Pending EP3796346A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP19198956.5A EP3796346A1 (en) 2019-09-23 2019-09-23 Compensation block for air choke coils and transformers
PCT/EP2020/074201 WO2021058229A1 (en) 2019-09-23 2020-08-31 Compensation block for air-core inductors and transformers
CN202080074476.3A CN114631160A (en) 2019-09-23 2020-08-31 Compensation block for air choke and transformer
BR112022005367A BR112022005367A2 (en) 2019-09-23 2020-08-31 Compensation block for air core reactors and transformers
US17/762,818 US20220344094A1 (en) 2019-09-23 2020-08-31 Compensation block for air-core reactors and transformers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19198956.5A EP3796346A1 (en) 2019-09-23 2019-09-23 Compensation block for air choke coils and transformers

Publications (1)

Publication Number Publication Date
EP3796346A1 true EP3796346A1 (en) 2021-03-24

Family

ID=68051708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19198956.5A Pending EP3796346A1 (en) 2019-09-23 2019-09-23 Compensation block for air choke coils and transformers

Country Status (5)

Country Link
US (1) US20220344094A1 (en)
EP (1) EP3796346A1 (en)
CN (1) CN114631160A (en)
BR (1) BR112022005367A2 (en)
WO (1) WO2021058229A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2934719A1 (en) * 1978-08-31 1980-03-13 Hitachi Ltd Encapsulated transformer with HV and LV winding - has insulators between HV winding and metal supporting elements, containing potential control capacitors (NL 4.3.80)
EP0084412A1 (en) * 1982-01-20 1983-07-27 TRENCH ELECTRIC, a Division of Guthrie Canadian Investments Limited Low loss spiders and air core reactor incorporating the same
DE20105608U1 (en) * 2001-03-27 2001-11-08 Siemens Ag Support device for an electrical component in the form of a coil
DE102008010548A1 (en) * 2008-02-22 2009-08-27 Abb Technology Ag Two- or multi-phase transformer
WO2009126977A1 (en) 2008-04-18 2009-10-22 Trench Austria Gmbh Electrostatic screen for an hvdct component
EP2973621A1 (en) 2013-03-15 2016-01-20 Trench Austria GmbH Winding layer pitch compensation for an air-core reactor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2934719A1 (en) * 1978-08-31 1980-03-13 Hitachi Ltd Encapsulated transformer with HV and LV winding - has insulators between HV winding and metal supporting elements, containing potential control capacitors (NL 4.3.80)
EP0084412A1 (en) * 1982-01-20 1983-07-27 TRENCH ELECTRIC, a Division of Guthrie Canadian Investments Limited Low loss spiders and air core reactor incorporating the same
DE20105608U1 (en) * 2001-03-27 2001-11-08 Siemens Ag Support device for an electrical component in the form of a coil
DE102008010548A1 (en) * 2008-02-22 2009-08-27 Abb Technology Ag Two- or multi-phase transformer
WO2009126977A1 (en) 2008-04-18 2009-10-22 Trench Austria Gmbh Electrostatic screen for an hvdct component
EP2973621A1 (en) 2013-03-15 2016-01-20 Trench Austria GmbH Winding layer pitch compensation for an air-core reactor

Also Published As

Publication number Publication date
WO2021058229A1 (en) 2021-04-01
US20220344094A1 (en) 2022-10-27
BR112022005367A2 (en) 2022-06-14
CN114631160A (en) 2022-06-14

Similar Documents

Publication Publication Date Title
EP1184963B1 (en) DC-DC high voltage converter
EP2501002B1 (en) Diagonal demounting module for a switchgear
EP2277183B1 (en) Modular ring-shaped core
DE2002192B2 (en) TRANSFORMER, THROTTLE COIL OR THE LIKE. INDUCTION DEVICES FOR HIGH OPERATING VOLTAGE
DE2602369A1 (en) FASTENING AND TENSIONING DEVICE FOR END SECTIONS OF WINDING LADDERS IN ELECTRIC MACHINES
EP3796346A1 (en) Compensation block for air choke coils and transformers
DE102008064500B4 (en) Electric machine with support of the winding circuit on the stator lamination stack
WO2010086231A1 (en) Surge voltage protector having an insulating sheath
WO2003025391A1 (en) Area sub-division of a wind-energy farm
EP3501882A1 (en) Transformer device for a charging station for electric vehicles with at least two load points
WO2009146835A2 (en) Transformer
EP2239745B1 (en) Voltage transformer with amorphous coil
WO2013083347A1 (en) Surge arrester
EP0163907B1 (en) High-tension transformer winding with regulated voltage distribution
EP0051715B1 (en) Protective device for high-voltage condenser bushings
DE102019105761A1 (en) Vehicle with an inverter and method for increasing the service life of an inverter
DE3036159C2 (en) Three-phase transformer with step switching device and external fine step windings
EP0041917B2 (en) Inductive-voltage transformer for a fully insulated, metal-enclosed high-voltage switchgear
EP3979278B1 (en) Current transformer module for a switchgear and corresponding switchgear
EP3593427B1 (en) Short-circuit resistant bus bar arrangement
EP3420570B1 (en) Electrical high-voltage device with a regulating winding group
DE19608289C2 (en) High-voltage winding for transformers and choke coils consisting of disc coils
EP3057109A1 (en) Surge arrester
DE3032315A1 (en) Winding connections for heavy duty auto-transformer - has conductors for series and parallel windings, positioned across one end and spanning three iron cores
DE2653591A1 (en) HIGH PERFORMANCE TRANSFORMER FOR ULTRA HIGH VOLTAGE

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20210924

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20230315

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20240311