EP0037796B1 - Transformateur de courant isolé au gaz ou au liquide - Google Patents

Transformateur de courant isolé au gaz ou au liquide Download PDF

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Publication number
EP0037796B1
EP0037796B1 EP81730027A EP81730027A EP0037796B1 EP 0037796 B1 EP0037796 B1 EP 0037796B1 EP 81730027 A EP81730027 A EP 81730027A EP 81730027 A EP81730027 A EP 81730027A EP 0037796 B1 EP0037796 B1 EP 0037796B1
Authority
EP
European Patent Office
Prior art keywords
support plate
current transformer
box
insulator
plate
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.)
Expired
Application number
EP81730027A
Other languages
German (de)
English (en)
Other versions
EP0037796A1 (fr
Inventor
Rudolf Bahr
Peter Stenzel
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 AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Priority to AT81730027T priority Critical patent/ATE6448T1/de
Publication of EP0037796A1 publication Critical patent/EP0037796A1/fr
Application granted granted Critical
Publication of EP0037796B1 publication Critical patent/EP0037796B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • H01F38/28—Current transformers
    • H01F38/30—Constructions
    • 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
    • H01F27/02—Casings
    • H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
    • 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling

Definitions

  • the invention relates to a gas or liquid-insulated current transformer for high voltage with a head housing attached above an insulator, which is penetrated by a primary conductor and in which at least one iron core with an applied secondary winding is accommodated in a protective cover, the protective cover being carried by a metal tube , which runs in the insulator and is fastened to an upper support plate of a foot housing located below the insulator, the current transformer is supported on the outer edge of the support plate and a box with bushings hangs on the support plate below.
  • the gas or liquid-filled space is limited by the insulator, the head housing, a metal shield and the annular area of the support plate between the metal shield and the insulator.
  • the insulator is gas-tightly connected to the head housing and the support plate;
  • the metal shield contains a gap, in the area of which the metal shield is sealed off from the outside.
  • the connection point between the metal shield and the support plate is thus also made gastight or liquid-tight.
  • a box below the support plate only serves to stabilize the mechanical connection of the metal pipe to the support plate.
  • the annular area of the support plate between the insulator and the metal shield is stressed both by the weight of the current transformer and by the pressure of the insulating medium.
  • the upper support plate of the foot housing not only fulfills a carrying function for the insulator and the protective cover with the iron cores, but also forms a pressure wall of the gas-filled interior of the current transformer.
  • the support plate is therefore subjected to a relatively high mechanical load and must therefore be made of a relatively solid, high-quality material.
  • the invention has for its object to propose a gas or liquid insulated current transformer in which the support plate of the foot housing is relatively little stressed.
  • the box is attached in a gastight or liquid-tight manner to the support plate provided with feet and is sealed at the bottom with a bushing plate carrying the bushings, and the interior of the box is closed Through holes in the support plate connected to the interior of the insulator and the head housing.
  • the support plate is therefore deliberately not sealed off from the part of the foot housing below it, so that the same pressure prevails above and below the support plate; the support plate of the current transformer according to the invention therefore only carries out a carrying function for the insulator and the protective cover with the iron cores and is not stressed by the pressure of the insulating gas or the insulating liquid.
  • the interior of the current transformer according to the invention is sealed from the outside in the area of the foot housing by the box which hangs on the bottom of the support plate and is therefore not used for the carrying function in the current transformer according to the invention.
  • the feet of the current transformer are held on the outer edge of the support plate.
  • the box is therefore only claimed by the pressure inside the current transformer according to the invention and must therefore only be dimensioned with a view to this pressure. This leads to a relatively low use of high-quality material.
  • the design of the current transformer according to the invention makes it possible to advantageously arrange a filter in the form of a ring in the space of the box above the feed-through plate.
  • the filter is a filter used in gas-insulated high-voltage switchgear and is used to bind moisture.
  • the arrangement of the filter within the box facilitates its replacement, if necessary, because the filter is only accessible from the feed-through plate after loosening.
  • the through holes in the support plate allow the insulating gas to circulate through convection and therefore enable the filter to perform its function satisfactorily.
  • the filter advantageously lies in an annular space which is formed on the one hand by the support plate and on the other hand by an annular part welded to the box; the feed-through plate is fastened to the ring part with the interposition of a sealing ring.
  • the structural design of the current transformer according to the invention with respect to the foot housing advantageously leads to the fact that the lead-through plate for leading electrical lines out of the interior of the current transformer is only exposed to the pressure of the insulating gas or the insulating liquid; The feed-through plate is not exposed to additional loads from carrying functions.
  • the contact pins are provided with connecting wires before the casting, so that after the casting no mechanical forces have to be exerted on the contact pins. Such forces, which otherwise arise when the connecting wires are clamped, could cause the feed-through plate to leak in the area of the contact pins.
  • the current transformer 1 shown has an insulator 2 to which a head housing 4 is fastened via a flange connection 3.
  • the head housing 4, which is made of metal, is penetrated by a conductor 5, which forms the primary winding of the current transformer 1.
  • a protective cover 6 is arranged within the head housing 4, in which iron cores 7 and 8 with secondary windings 9 and 10 are accommodated; the protective cover 6 thus represents a conventional core shell and is also made of metal.
  • the protective cover 6 is mechanically connected to a metal tube 12 of a plastic film leadthrough 13 via a connecting member 11.
  • the metal tube 12 passes through the insulator 2 and carries a fastening flange 14 at its lower end in FIG. 1. With this fastening flange 14, the metal tube 12 stands on an upper support plate 15 of a foot housing 16.
  • the metal tube 12 is fixed to the support plate by screws 17 15 braced.
  • the support plate 15 like the flange 3 of the head housing 4, is tightly connected to the insulator 2.
  • the support plate 15 has on its outer edge 18 feet 19 which are arranged, for example, offset at an angle of 90 °. The current transformer according to the invention is thus held over the feet 19 and the support plate 15.
  • a gas-tight or liquid-tight box 20 which is welded to the support plate 15, for example.
  • a ring part 21 made of metal is welded, which carries a sealing ring 22.
  • a filter 24, which binds the moisture in a known manner when the current transformer is filled with gas, is accommodated above the ring part 21 in an annular space 23 formed by this ring part 21 and the support plate 15.
  • a bushing plate 25 is screwed onto the ring part 21 from below, as a result of which the space above the sealing plate 25 is sealed off from the free atmosphere.
  • the box 20 actually hangs on the support plate 15, that is to say does not reach as far down as the feet 19. Therefore, the box 20 is only exposed to the pressure of the insulating gas or the insulating liquid in its space 27 and can therefore relate to it be dimensioned according to its wall. The box 20 therefore does not have any supporting functions, so that it can be relatively thin in relation to its wall.
  • the feed-through plate 25 has four diversions 38 in the exemplary embodiment shown. 2 and 3 show that each rejection takes place via a contact pin 30, at the two ends 31 and 32 of which connecting wires 33 and 34 are clamped in the usual manner.
  • the feed-through plate 25 is designed as a cast plastic plate and is produced in such a way that the contact pins 30 are provided with the connecting wires 33 and 34 before the contact pins 30 are embedded. After the encapsulation, the embedded contact pins 30 thus have the connecting wires 33 and 34 and therefore do not have to be clamped subsequently. This has the great advantage that the contact pins are not mechanically stressed, so that leaks in the area of the contact pins are avoided.
  • circumferential grooves 35 and 36 are provided on both sides of the feed-through plate 25.
  • the connecting wires 33 and 34 are then connected at contact points 37 both to the secondary connecting lines 38 of the secondary windings 9 and 10 and also to connecting lines 39 to secondary terminals (not shown in the figure) in a secondary terminal box 40; this connection takes place at points 41.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)

Claims (5)

1. Transformateur de courant isolé au gaz ou au liquide pour haute tension avec un boîtier de tête (4) monté au-dessus d'un isolateur (2) et qui est traversé par un conducteur primaire (5), et dans lequel se trouve logé dans une enveloppe de protection (6) au moins un noyau de fer (7, 8) sur lequel est monté un enroulement secondaire (9, 10), l'enveloppe de protection étant portée par un tube métallique (12) qui s'étend dans l'isolateur (2) et qui est fixé à une plaque d'appui supérieure (15) d'un boîtier de pied (16) se situant en dessous de l'isolateur, qu'au bord extérieur de la plaque d'appui a lieu un appui du transformateur de courant et qu'une boîte (20) munie de traversées est suspendue dans le bas de la plaque d'appui, caractérisé par le fait que la boîte (20) est fixée, avec étanchéité aux gaz et au liquide, à la plaque d'appui (15) pourvue de pieds, et est obturée vers le bas, de façon étanche, avec une plaque de traversée (25) portant les traversées, et que l'espace intérieur (27) de la boîte (20) est relié à l'espace intérieur de l'isolateur (2) et du boîtier de tête par l'intermédiaire de trous de passage (26) ménagés dans la plaque d'appui.
2. Transformateur de courant selon la revendication 1, caractérisé par le fait que dans l'espace intérieur (27) de la boîte (20) et au-dessus de la plaque à traversées (25), est disposé un filtre (24) de forme annulaire.
3. Transformateur de courant selon la revendication 1 ou 2, caractérisé par le fait que le filtre (24) est situé dans un espace annulaire (23) qui est constitué d'une part par la plaque d'appui (15) et d'autre part par une pièce annulaire (21) qui est soudée à la boîte (20), et qu'à élément annulaire (21), et avec interposition d'une bague d'étanchéité (22), est fixée la plaque à traversées (25).
4. Transformateur de courant selon l'une des revendications précédentes, caractérisé par le fait qu'à la boîte (20) est fixée une boîte à bornes (40) destinée à recevoir les bornes du secondaire.
5. Transformateur de courant selon l'une des revendications précédentes, caractérisé par le fait que la plaque à traversées est une plaque moulée (25) en matière plastique, dans laquelle sont noyées, avant la coulée, des chevilles de contact (30) qui sont pourvues de fils de branchement.
EP81730027A 1980-03-27 1981-03-09 Transformateur de courant isolé au gaz ou au liquide Expired EP0037796B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81730027T ATE6448T1 (de) 1980-03-27 1981-03-09 Gas- oder fluessigkeitsisolierter stromwandler.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8008660U 1980-03-27
DE8008660 1980-03-27

Publications (2)

Publication Number Publication Date
EP0037796A1 EP0037796A1 (fr) 1981-10-14
EP0037796B1 true EP0037796B1 (fr) 1984-02-29

Family

ID=6714265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81730027A Expired EP0037796B1 (fr) 1980-03-27 1981-03-09 Transformateur de courant isolé au gaz ou au liquide

Country Status (2)

Country Link
EP (1) EP0037796B1 (fr)
AT (1) ATE6448T1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105448509A (zh) * 2015-12-03 2016-03-30 成都格瑞思文化传播有限公司 一种高压电流互感器
CN107275065A (zh) * 2017-08-13 2017-10-20 安徽君华舜义恩佳非晶材料有限公司 一种易于安装使用的电流互感器
CN111986883A (zh) * 2020-06-19 2020-11-24 阳光电源股份有限公司 固态变压器及其制备方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8300513A (nl) * 1983-02-11 1984-09-03 Philips Nv Hoogfrequentspoel met aansluitpennen.
FR2671670B1 (fr) * 1991-01-10 1993-04-09 Avocat Jean Paul Borne haute tension de raccordement.
DE4232090C1 (de) * 1992-09-25 1994-04-07 Loewe Opta Gmbh Transformator zur Erzeugung einer Hochspannung für eine Bildröhre in einem Monitor oder einem Fernsehempfangsgerät
FR2820540A1 (fr) * 2001-02-07 2002-08-09 Alstom Disposition d'assemblage d'une barre electriquement conductrice traversant de part en part une cuve metallique et procede de mise en oeuvre
CN104124047A (zh) * 2013-04-25 2014-10-29 国家电网公司 电流互感器及其互感器底座
EP2800113B1 (fr) * 2013-04-29 2016-03-16 ABB Technology AG Transformateur de mesure sec à haute tension
CN104360129A (zh) * 2014-11-05 2015-02-18 中国西电电气股份有限公司 一种加内支撑的电磁式电流互感器器身结构

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB221201A (en) * 1923-08-30 1925-04-02 Vickers Electrical Co Ltd Improvements in or relating to tanks for electrical or other apparatus
DE723869C (de) * 1930-03-26 1942-08-12 Koch & Sterzel Ag Messwandlereinrichtung zum gleichzeitigen Messen von Strom und Spannung
GB567789A (en) * 1943-08-27 1945-03-02 John Harold Buchanan Improvements in or relating to oil- or liquid-immersed electric transformers and other apparatus for use on high voltage circuits
US2504647A (en) * 1947-12-06 1950-04-18 Gen Electric Electric induction meter system
GB651506A (en) * 1947-12-06 1951-04-04 Vickers Electrical Co Ltd Improvements in electrical induction apparatus
DE1118347B (de) * 1960-02-11 1961-11-30 Siemens Ag Elektrodynamischer Stromwandler
FR1384491A (fr) * 1964-03-06 1965-01-04 Siemens Ag Transformateur d'intensité et de potentiel combiné
DE1513870A1 (de) * 1965-06-14 1969-04-10 Gen Electric Hochspannungstransformator
DE2544057A1 (de) * 1975-09-30 1977-03-31 Siemens Ag Primaerseitig umschaltbarer stromwandler
DE2749659A1 (de) * 1977-11-05 1979-05-10 Balteau Sa Messwandler

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7233406U (de) * 1972-09-06 1972-12-07 Siemens Ag Hochspannungstromwandler in kopfbauweise

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB221201A (en) * 1923-08-30 1925-04-02 Vickers Electrical Co Ltd Improvements in or relating to tanks for electrical or other apparatus
DE723869C (de) * 1930-03-26 1942-08-12 Koch & Sterzel Ag Messwandlereinrichtung zum gleichzeitigen Messen von Strom und Spannung
GB567789A (en) * 1943-08-27 1945-03-02 John Harold Buchanan Improvements in or relating to oil- or liquid-immersed electric transformers and other apparatus for use on high voltage circuits
US2504647A (en) * 1947-12-06 1950-04-18 Gen Electric Electric induction meter system
GB651506A (en) * 1947-12-06 1951-04-04 Vickers Electrical Co Ltd Improvements in electrical induction apparatus
DE1118347B (de) * 1960-02-11 1961-11-30 Siemens Ag Elektrodynamischer Stromwandler
FR1384491A (fr) * 1964-03-06 1965-01-04 Siemens Ag Transformateur d'intensité et de potentiel combiné
DE1513870A1 (de) * 1965-06-14 1969-04-10 Gen Electric Hochspannungstransformator
DE2544057A1 (de) * 1975-09-30 1977-03-31 Siemens Ag Primaerseitig umschaltbarer stromwandler
DE2749659A1 (de) * 1977-11-05 1979-05-10 Balteau Sa Messwandler

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105448509A (zh) * 2015-12-03 2016-03-30 成都格瑞思文化传播有限公司 一种高压电流互感器
CN107275065A (zh) * 2017-08-13 2017-10-20 安徽君华舜义恩佳非晶材料有限公司 一种易于安装使用的电流互感器
CN107275065B (zh) * 2017-08-13 2019-04-23 北京北斗银河科技有限公司 一种易于安装使用的电流互感器
CN111986883A (zh) * 2020-06-19 2020-11-24 阳光电源股份有限公司 固态变压器及其制备方法

Also Published As

Publication number Publication date
EP0037796A1 (fr) 1981-10-14
ATE6448T1 (de) 1984-03-15

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