EP0627750A1 - Transformateur de courant et de tension combiné pour hautes tensions - Google Patents

Transformateur de courant et de tension combiné pour hautes tensions Download PDF

Info

Publication number
EP0627750A1
EP0627750A1 EP94890065A EP94890065A EP0627750A1 EP 0627750 A1 EP0627750 A1 EP 0627750A1 EP 94890065 A EP94890065 A EP 94890065A EP 94890065 A EP94890065 A EP 94890065A EP 0627750 A1 EP0627750 A1 EP 0627750A1
Authority
EP
European Patent Office
Prior art keywords
transformer
voltage transformer
current
voltage
insulation
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.)
Withdrawn
Application number
EP94890065A
Other languages
German (de)
English (en)
Inventor
Boris Dipl.-Ing. Bojanic
Tomislav Hafner
Miroslav Dipl.-Ing. Poljak
Josip Dipl.-Ing. Tomasevic
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.)
Koncar Mjerni Transformatori doo
Original Assignee
Koncar Mjerni Transformatori doo
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 Koncar Mjerni Transformatori doo filed Critical Koncar Mjerni Transformatori doo
Publication of EP0627750A1 publication Critical patent/EP0627750A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • H01F38/34—Combined voltage and current transformers
    • H01F38/36—Constructions

Definitions

  • the object of the present invention is a combined current and voltage transformer for high voltages which consists of a current transformer of inverse type placed in the transformer head and an inductive voltage transformer with a stack magnetic core.
  • Combined current and voltage transformers are mostly made as separate isolated current or rather voltage transformer put into one or two housings with a joint supporting insulator.
  • the inductive combined transformers are made in such way that the current transformer and voltage transformer with a closed magnetic core are placed in one common or two separate metal housings, which practically means that all sorts of combinations in distribution are possible.
  • the most frequently seen variants are that the current transformer is of the inverse type, placed in the head, whereas the voltage transformer is in the base, or both transformers are in the head of the combined transformer. In the latter variant there are two combinations possible, meaning that the active part of the voltage transformer can be placed above or below the current transformer.
  • the basic disadvantage of this solution is that the volume, mass and height of the transformer head are comparatively big in relation to the supporting insulator and this proportion grows with increased rated voltage of the transformer. Furthermore, due to the distribution of weight, the center of gravity of the transformer is high above the base of the transformer so that such a design is statically unstable, especially in case of an earthquake.
  • the primary winding of the voltage transformer has to be insulated for the full voltage against the current transformer which in addition results in increased dimensions and weight of a combined transformer constructed in such a way.
  • the metal tube through which the secondary leads of the voltage transformer are conducted, has to be insulated against the full voltage, which demands even more space.
  • the present invention aims at solving the technical problem of finding a new design for a combined current and voltage transformer for high voltage by placing the whole inductive voltage transformer into the supporting insulator.
  • the combined current and voltage transformer for high voltages according to the present invention is essentially characterized in that he secondary leads of the current transformer are laid by or through the open magnetic core of the voltage transformer, which together with its appertaining secondary winding of the voltage transformer is placed in the vertical axis of the transformer inside an earthed supporting tube and around which is placed the insulation of the voltage transformer, which together with the insulation of the current transformer in the area of the head make an unseparably entity and in that the sections of the primary winding of the voltage transformer are placed vertically inside the supporting insulator around the insulation of the voltage transformer.
  • the idea of the present invention is in application of the inductive voltage transformer with an open core, which is placed in a supporting insulator and makes an integral part of the combined transformer.
  • a part of the insulation of the inverse current transformer, by which its supporting mechanical tube is insulated against high voltage is used as the insulation for the voltage transformer, and the hollow space inside this tube is used to place a core and secondary windings of the voltage transformer.
  • the above-mentioned disadvantages of the prior art are eliminated through the new concept of the combined current and voltage transformer for high voltages according to the present invention which has the current transformer made as a transformer of inverse type with cores and secondary windings placed in the head of the combined transformer.
  • the voltage transformer has an open magnetic core which is placed together with its windings on the vertical axis of the combined transformer, inside the supporting tube, through which the secondary windings of the current transformer are deducted too.
  • the primary winding of the voltage transformer is made out of several sections which are placed upon the cover of the main insulation wound around the supporting tube placed vertically inside the supporting insulator.
  • the primary winding of the current transformer has one or more turns und/or the current transformer has one or more cores.
  • the current transformer can be multiply reconnectable on the primary and/or secondary side.
  • the voltage transformer has one or more secondary windings.
  • the special advantage of the innovative design, according to the present invention is that compared to the well-known designs it takes up much less space. This is achieved by placing the open magnetic core and the secondary windings of the voltage transformer inside the supporting tube which carries the active part of the current transformer. In addition to that distributing the primary winding of the voltage transformer along the vertical axis of the supporting insulator helps to save some space and at the same time optimizes the distribution of potential along the vertical axis of the transformer.
  • Another advantage of the design proposed by the present invention is the mechanical stability, since by placing the core and the primary winding of the voltage transformer vertically inside the supporting insulator an even distribution of weight within the combined transformer is achieved.
  • the figur shows a vertical intersection of an example of a combined current and voltage transformer for high voltages according to the present invention.
  • the combined current and voltage transformer for high voltages shown in the figur consists of a head 1, a supporting insulator 2 and a base 3.
  • the head 1 there are placed cores and secondary windings 4 of a current transformer, which are insulated against the potential of the head 1 by the appertaining part 5 of the main insulation.
  • This design shows the primary winding 6 of the current transformer as a bar primary winding.
  • the practice there are other possible variants with a bigger number of turns of the primary winding and/or cores and with a double or quadruple reconnection on the primary side of the current transformer.
  • Secondary leads 7 of current transformer are placed by or through the open magnetic core 9 of a voltage transformer until they reach the secondary terminal box 10 at the base 3 of the transformer.
  • the open magnetic core 9 of the voltage transformer is made of electrical steel-sheets as a stack core with one or more packages and it is mechanically fixed in the base 3 of the transformer. Alongside the open magnetic core 9 there is wound at least one secondary winding 11 of voltage transformer, the leads of which end in the secondary terminal box 10. The open magnetic core 9 with the secondary windings 11 of the voltage transformer is placed vertically inside the supporting tube 8. The supporting tube 8 is at the same time a supporting mechanic carrier of the current transformer.
  • the whole main insulation of the combined current and voltage transformer makes a compact entity, consisting of part 5, i.e. the insulation of current transformer in the area of the transformer head 1 and part 12, i.e. the insulation of the voltage transformer which is at the same time the insulation of supporting tube 8.
  • Part 12 insulation of voltage transformer may be done stepwise, so that the thickness of insulation diminishes from the top towards the transformers parts which are earthed.
  • the primary winding 13 of the voltage transformer can be divided into a few sections. Each section of the primary winding 13 contains a certain number of turns which are in the form of multi-layer windings wound around the carriers of sections made out of insulation material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Details Of Television Scanning (AREA)
EP94890065A 1993-04-07 1994-04-05 Transformateur de courant et de tension combiné pour hautes tensions Withdrawn EP0627750A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HR93079493 1993-04-07
HRP930794 HRP930794A2 (en) 1993-04-07 1993-04-07 Combined electrical and voltage transformer for high voltage

Publications (1)

Publication Number Publication Date
EP0627750A1 true EP0627750A1 (fr) 1994-12-07

Family

ID=10945929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94890065A Withdrawn EP0627750A1 (fr) 1993-04-07 1994-04-05 Transformateur de courant et de tension combiné pour hautes tensions

Country Status (2)

Country Link
EP (1) EP0627750A1 (fr)
HR (1) HRP930794A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101221199B (zh) * 2008-01-23 2010-06-16 杨振敏 自生电源等电位高压电能测量装置
EP3208816A1 (fr) * 2016-02-17 2017-08-23 General Electric Technology GmbH Transformateur de courant comportant des composants de transformation secondaire dans sa base
CN107192974A (zh) * 2017-07-19 2017-09-22 云南电网有限责任公司电力科学研究院 一体化电压电流标准互感器
CN109148132A (zh) * 2018-08-04 2019-01-04 安徽华能集团电器有限公司 一种可折叠式互感器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1011844A (fr) * 1949-04-04 1952-06-27 Cfcmug Dispositif de mesure électrique
FR1086362A (fr) * 1953-07-10 1955-02-11 Comp Generale Electricite Transformateur de mesure à haute tension à circuit magnétique ouvert
GB742554A (en) * 1952-07-15 1955-12-30 Reyrolle A & Co Ltd Improvements relating to high-voltage instrument transformers
CH312592A (de) * 1953-04-10 1956-01-31 Sprecher & Schuh Ag Hochspannungsmesswandler
CH324242A (de) * 1954-02-05 1957-09-15 Moser Glaser & Co Ag Kombinierter Strom- und Spannungswandler
GB827097A (en) * 1957-05-28 1960-02-03 British Thomson Houston Co Ltd Improvements in electrical instrument and the like transformers
DE976080C (de) * 1951-05-17 1963-02-14 Friedrich Dr-Ing E H Raupach Kombinierter Strom- und Spannungswandler

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1011844A (fr) * 1949-04-04 1952-06-27 Cfcmug Dispositif de mesure électrique
DE976080C (de) * 1951-05-17 1963-02-14 Friedrich Dr-Ing E H Raupach Kombinierter Strom- und Spannungswandler
GB742554A (en) * 1952-07-15 1955-12-30 Reyrolle A & Co Ltd Improvements relating to high-voltage instrument transformers
CH312592A (de) * 1953-04-10 1956-01-31 Sprecher & Schuh Ag Hochspannungsmesswandler
FR1086362A (fr) * 1953-07-10 1955-02-11 Comp Generale Electricite Transformateur de mesure à haute tension à circuit magnétique ouvert
CH324242A (de) * 1954-02-05 1957-09-15 Moser Glaser & Co Ag Kombinierter Strom- und Spannungswandler
GB827097A (en) * 1957-05-28 1960-02-03 British Thomson Houston Co Ltd Improvements in electrical instrument and the like transformers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101221199B (zh) * 2008-01-23 2010-06-16 杨振敏 自生电源等电位高压电能测量装置
EP3208816A1 (fr) * 2016-02-17 2017-08-23 General Electric Technology GmbH Transformateur de courant comportant des composants de transformation secondaire dans sa base
CN107192974A (zh) * 2017-07-19 2017-09-22 云南电网有限责任公司电力科学研究院 一体化电压电流标准互感器
CN107192974B (zh) * 2017-07-19 2023-06-09 云南电网有限责任公司电力科学研究院 一体化电压电流标准互感器
CN109148132A (zh) * 2018-08-04 2019-01-04 安徽华能集团电器有限公司 一种可折叠式互感器
CN109148132B (zh) * 2018-08-04 2023-11-17 安徽华能集团电器有限公司 一种可折叠式互感器

Also Published As

Publication number Publication date
HRP930794A2 (en) 1994-10-31

Similar Documents

Publication Publication Date Title
US3962609A (en) Voltage transformer for a completely insulated high-voltage installation
EP0627750A1 (fr) Transformateur de courant et de tension combiné pour hautes tensions
MY106734A (en) Generator for generating an electric voltage.
US4075590A (en) Bobbin construction for electrical coils
US6642829B1 (en) High-voltage transformer
EP0307036A1 (fr) Transformateur
JPS609650B2 (ja) 高直列容量変圧器巻線
JP2000331850A (ja) 高圧発生コイル
US3835429A (en) Current transformer
KR920018785A (ko) 네온 변압기(가스튜브 사인용 트랜스포머)
JPS6236370B2 (fr)
US4047139A (en) Transformers of large capacity for ultra-high voltages
AU7621791A (en) Support for a hrc fuse or load switching device provided with a current transformer
CN2266229Y (zh) 一种绕组间耐高压的低分布电容、多绕组脉冲变压器
RU3055U1 (ru) Высоковольтный трансформатор тока
JPH0154842B2 (fr)
JPH0410661Y2 (fr)
JPH0310653Y2 (fr)
JPH0529162A (ja) 無電圧タツプ切換変圧器
CA2024289A1 (fr) Bobine de protection
JPH06231970A (ja) 静止誘導電気機器
UA19513A (uk) Вимірювальhий траhсформатор струму
JPH03114210A (ja) 箔巻変圧器
JPS63312610A (ja) 箔巻変圧器
JPH03159217A (ja) 変圧器

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GR IT LI SE

RAX Requested extension states of the european patent have changed

Free format text: SI PAYMENT 940427

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19950608