EP2239744A1 - Transformateur de courant à plusieurs intervalles de mesure - Google Patents

Transformateur de courant à plusieurs intervalles de mesure Download PDF

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Publication number
EP2239744A1
EP2239744A1 EP09460015A EP09460015A EP2239744A1 EP 2239744 A1 EP2239744 A1 EP 2239744A1 EP 09460015 A EP09460015 A EP 09460015A EP 09460015 A EP09460015 A EP 09460015A EP 2239744 A1 EP2239744 A1 EP 2239744A1
Authority
EP
European Patent Office
Prior art keywords
current
instrument transformer
external
terminal
enclosure
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Withdrawn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
EP09460015A
Other languages
German (de)
English (en)
Inventor
Pawel Debski
Jaroslaw Duzdowski
Bogusz Lewandowski
Zbigniew Wesolowski
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.)
ABB Technology AG
Original Assignee
ABB Technology 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 ABB Technology AG filed Critical ABB Technology AG
Priority to EP09460015A priority Critical patent/EP2239744A1/fr
Priority to CN201080015235.8A priority patent/CN102379014B/zh
Priority to EP10713564A priority patent/EP2417612B1/fr
Priority to ES10713564T priority patent/ES2406813T3/es
Priority to PCT/EP2010/001894 priority patent/WO2010115522A1/fr
Priority to PL10713564T priority patent/PL2417612T3/pl
Publication of EP2239744A1 publication Critical patent/EP2239744A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • 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

Definitions

  • the subject of the invention is a multirange current instrument transformer applicable especially in combined high voltage instrument transformers comprised of a voltage instrument transformer and a current instrument transformer, both placed in one enclosure.
  • JP8115836 there is known a three-range current instrument transformer in which the primary and secondary windings are located in the metal bottom tank filled with insulating/cooling liquid or gas. The ends and beginnings of the primary windings are connected to the primary terminals of the instrument transformer, situated in the insulating cover of the top tank of the instrument transformer. Two incoming and outgoing terminals, connected to the external feeder, are arranged evenly on the circumference of the insulating cover of the top tank of the instrument transformer and they are brought out of the instrument transformer through bushings. Inside the instrument transformer there are connections of the instrument transformer outer terminals to the extreme output leads of the whole primary winding.
  • the ends and beginnings of all primary windings are marked and brought out of the instrument transformer in pairs through the insulating cover of the upper tank.
  • the current range of the instrument transformer is switched by making series, parallel or series-parallel connections of the ends and beginnings of the windings brought out through the insulating cover of the upper tank, through cramps allowing the equipment operation on the following ranges, respectively: the highest rated current, medium current or the lowest rated current, for which the instrument transformer has been designed.
  • the instrument transformer according to the invention comprises a current path placed in a metal enclosure, formed by at least two current circuits electrically interconnected and connected to an external current supply terminal and an external current outgoing terminal.
  • the external current supply terminal is a metal plate to which the current path terminals are connected and it is situated in a bushing fixed tightly in the wall of the metal enclosure of the instrument transformer tank.
  • the bushing there are at least two metal elements in the form of external terminals K1, K2...Kn used to electrically connect one end of the current path with the external current supply terminal by means of only one external cramp.
  • the other end of the current path is permanently connected with an internal terminal attached to the wall of the metal enclosure inside the instrument transformer, the internal terminal being a contact connection with the external current outgoing terminal which is an integral part of the instrument transformer enclosure.
  • the internal terminal is attached to the instrument transformer enclosure wall on the side opposite to the situation of the bushing.
  • the current supply terminal is a rectangular metal plate and the external terminals K1 and K2 are placed in a bushing near one outside edge of the metal current-supply terminal-plate, within the reach of the span of the bolts that fasten the cramp.
  • the current supply terminal is a rectangular metal plate and the external terminals K1 and K2 are placed in a bushing near one outside edge of the metal current-supply terminal-plate, within the reach of the span of the bolts that fasten the cramp, and a terminal K3 is placed in a bushing near another outer edge of the metal current-supply terminal-plate, within the reach of the span of the bolts that fasten the cramp.
  • the cramp has the shape of a quadratic prism.
  • the cramp fixed to the external terminals (K1...Kn) by means of bolts.
  • the cramp is fixed to the external terminals (K1...Kn) by means of screws.
  • the instrument transformer according to the invention has a number of advantages as compared to known devices.
  • fig. 1 shows a combined instrument transformer in longitudinal section
  • fig. 2 - a fragment of the instrument transformer from fig. 1 including the instrument transformer head in cross-section along line A-A
  • fig. 3 the front view of the bushing
  • fig. 4 the wiring diagram of the primary current path of the current instrument transformer
  • fig. 5 the cramp in a perspective view.
  • the head-type combined instrument transformer comprises a current part in the form of a current instrument transformer 1 and a voltage part in the form of a voltage instrument transformer 2.
  • the current instrument transformer 1 is placed in a metal enclosure 3 situated in the upper part of the combined instrument transformer.
  • the enclosure 3 is a cast aluminum top tank which is the head of the combined instrument transformer.
  • the voltage instrument transformer 2 is situated in the bottom part of the combined instrument transformer, in a cast-aluminum bottom tank 4.
  • the metal enclosure 3 is electrically separated from the bottom tank 4 by means of a high-voltage insulator 5 made of porcelain or silicone.
  • the inside of the enclosure 3 and of the bottom tank 4 as well as of the insulator 5 is filled with insulating and cooling liquid 6.
  • the output leads of the secondary winding 7 of the current instrument transformer 1 and of the secondary winding 8 of the voltage instrument transformer 2 are brought to the terminals of a terminal box 9 connected to the outer part of the bottom tank 4.
  • One end of the primary winding of the voltage instrument transformer 2 is directly connected to the wall of the metal enclosure 3, whereas the other end of the primary winding of this instrument transformer is connected through a terminal box 9 to an earth electrode terminal 10 connected to the bottom tank 4.
  • the current path 11 of the current instrument transformer 1 is formed by primary windings interconnected in series, and the beginning of the current path 11 is connected with an external current supply terminal P1, and the end is connected with an external current outgoing terminal P2 externally connected to the conducting wall of the enclosure 3 to which, on the inside of the tank, an internal terminal 12 is attached.
  • the internal terminal 12 is electrically connected through the enclosure 3 with the external current outgoing terminal P2, to which the external feeder is connected.
  • the current supply terminal P1 is a metal plate which is situated in a hollow 13 of a bushing 14 made of resin and tightly fixed in the wall of the upper tank 2.
  • the metal plate of the terminal P1 is sealed in the bushing 14 and it has seven threaded holes of which four holes 15 are centrally arranged on the plate of the terminal P1 and they are used to attach the external feeder.
  • the other threaded holes 16 are used to connect a cramp 17, used to change the current range, to one of the external terminals K1, K2 and K3.
  • the external terminals K1, K2 and K3 are metal elements with a threaded hole 18.
  • the external terminals K1, K2, K3 can be made, for example, as aluminum quadratic prisms or cylinders containing the threaded hole 18. These terminals can be made as threaded segments of metal pipes and they can also have other shapes, which is not shown in the drawing.
  • the external terminals K1, K2 and K3 are placed port-like in the bushing 14 in such way that none of these elements touch themselves or the metal plate terminal P1, so that there is no electric contact between these elements.
  • the distance between the holes 18 of the terminals K1, K2, K3 and the holes 16 of the terminal plate P1 is identical for each terminal pair K1-P1, K2-P2 and K3-P1.
  • the cramp 17 is a metal plate with two holes 19 which are arranged on the face of the plate at a distance "L" corresponding to the distances of the holes of each pair of terminals K1-P1, K2-P2 i K3-P1.
  • the instrument transformer according to the invention is suitable for operation within three ranges of rated current whose value is in an interrelation of 1 : 2 : 4. Marking for each terminal K1, K2 and K3 its output as L1, L2 and L3 respectively, the following current paths are obtained:
  • Changing the measuring range of the instrument transformer is done in a simple way by unscrewing two fixing bolts 20, switching the cramp 17 to a different position and re-screwing the two fixing bolts, which does not require disconnecting the external feeder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)
EP09460015A 2009-04-06 2009-04-06 Transformateur de courant à plusieurs intervalles de mesure Withdrawn EP2239744A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP09460015A EP2239744A1 (fr) 2009-04-06 2009-04-06 Transformateur de courant à plusieurs intervalles de mesure
CN201080015235.8A CN102379014B (zh) 2009-04-06 2010-03-22 高压用多量程电流互感器
EP10713564A EP2417612B1 (fr) 2009-04-06 2010-03-22 Transformateur de courant à plusieurs intervalles de mesure
ES10713564T ES2406813T3 (es) 2009-04-06 2010-03-22 Instrumento transformador de corriente multirango para aplicaciones de alta tensión
PCT/EP2010/001894 WO2010115522A1 (fr) 2009-04-06 2010-03-22 Transformateur de mesure de courant à plusieurs calibres pour application haute tension
PL10713564T PL2417612T3 (pl) 2009-04-06 2010-03-22 Wielozakresowy przekładnik prądowy do zastosowań wysokonapięciowych

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09460015A EP2239744A1 (fr) 2009-04-06 2009-04-06 Transformateur de courant à plusieurs intervalles de mesure

Publications (1)

Publication Number Publication Date
EP2239744A1 true EP2239744A1 (fr) 2010-10-13

Family

ID=40999903

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09460015A Withdrawn EP2239744A1 (fr) 2009-04-06 2009-04-06 Transformateur de courant à plusieurs intervalles de mesure
EP10713564A Not-in-force EP2417612B1 (fr) 2009-04-06 2010-03-22 Transformateur de courant à plusieurs intervalles de mesure

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP10713564A Not-in-force EP2417612B1 (fr) 2009-04-06 2010-03-22 Transformateur de courant à plusieurs intervalles de mesure

Country Status (5)

Country Link
EP (2) EP2239744A1 (fr)
CN (1) CN102379014B (fr)
ES (1) ES2406813T3 (fr)
PL (1) PL2417612T3 (fr)
WO (1) WO2010115522A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2573781A1 (fr) * 2011-08-31 2013-03-27 ABB Sp.zo.o. Bobine à haute tension
EP2565884A3 (fr) * 2011-08-31 2013-10-09 ABB Sp.zo.o. Bobine haute tension
EP3208816A1 (fr) * 2016-02-17 2017-08-23 General Electric Technology GmbH Transformateur de courant comportant des composants de transformation secondaire dans sa base
WO2022033687A1 (fr) * 2020-08-13 2022-02-17 Siemens Energy Global GmbH & Co. KG Transformateur de courant

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104701003A (zh) * 2015-03-24 2015-06-10 山东钢铁股份有限公司 一种电流互感器的电气接线回路
CN105390261B (zh) * 2015-10-19 2017-05-24 长沙润智电子科技有限公司 抗干扰电流互感器
CN111933395B (zh) * 2020-07-30 2024-07-09 河南许继仪表有限公司 一种开启式取电电流互感器及其制作方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB183480A (en) * 1921-07-22 1923-05-24 Landis & Gyr Ag Multiple range electric current transformer
US4052685A (en) * 1976-05-31 1977-10-04 Westinghouse Canada Limited Current transformer
JPH08115836A (ja) * 1994-10-14 1996-05-07 Nissin Electric Co Ltd 三重比変流器

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2751421Y (zh) * 2004-07-14 2006-01-11 保定天威互感器有限公司 一种微油高压电流互感器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB183480A (en) * 1921-07-22 1923-05-24 Landis & Gyr Ag Multiple range electric current transformer
US4052685A (en) * 1976-05-31 1977-10-04 Westinghouse Canada Limited Current transformer
JPH08115836A (ja) * 1994-10-14 1996-05-07 Nissin Electric Co Ltd 三重比変流器

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2573781A1 (fr) * 2011-08-31 2013-03-27 ABB Sp.zo.o. Bobine à haute tension
EP2565884A3 (fr) * 2011-08-31 2013-10-09 ABB Sp.zo.o. Bobine haute tension
EP3208816A1 (fr) * 2016-02-17 2017-08-23 General Electric Technology GmbH Transformateur de courant comportant des composants de transformation secondaire dans sa base
WO2022033687A1 (fr) * 2020-08-13 2022-02-17 Siemens Energy Global GmbH & Co. KG Transformateur de courant

Also Published As

Publication number Publication date
EP2417612A1 (fr) 2012-02-15
WO2010115522A1 (fr) 2010-10-14
EP2417612B1 (fr) 2013-03-06
ES2406813T3 (es) 2013-06-10
PL2417612T3 (pl) 2013-05-31
CN102379014B (zh) 2014-08-20
CN102379014A (zh) 2012-03-14

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