EP0037366A1 - Transformateur de courant, isolé au gaz ou par liquide - Google Patents

Transformateur de courant, isolé au gaz ou par liquide Download PDF

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Publication number
EP0037366A1
EP0037366A1 EP81730028A EP81730028A EP0037366A1 EP 0037366 A1 EP0037366 A1 EP 0037366A1 EP 81730028 A EP81730028 A EP 81730028A EP 81730028 A EP81730028 A EP 81730028A EP 0037366 A1 EP0037366 A1 EP 0037366A1
Authority
EP
European Patent Office
Prior art keywords
housing
insulator
current transformer
flange
metal tube
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Withdrawn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
EP81730028A
Other languages
German (de)
English (en)
Inventor
Rudolf Bahr
Klaus-Dieter Dipl.-Ing. Kersten
Peter Ing. Grad. 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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0037366A1 publication Critical patent/EP0037366A1/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Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the invention relates to a gas or liquid insulated current transformer with a housing in which a protective sheath is kept at a distance, and with an insulator which is connected at one end to the housing and in which a controlled implementation with an inner metal tube for Holder of the protective cover extends, and with a further housing attached to the other end of the insulator with a holding plate to which the metal tube is attached at its other end.
  • the one housing forms a head housing by being located above the insulator.
  • a protective sheath is housed, an iron core is in the applied with the secondary winding.
  • the protective cover is held by means of a metal tube which is fastened to a holding plate which forms part of a further housing which, in the known current transformer, is an F uB housing.
  • the metal tube carrying the protective cover forms the inner metal tube of a controlled bushing which contains individual insulating cylinders arranged concentrically on the holding plate. Semiconducting coatings for capacitive control are applied to the insulating cylinders.
  • another metal tube runs inside the inner metal tube of the bushing, by which the iron iron is held with a secondary winding; this metal tube is also attached to the holding plate.
  • the known current transformer has the disadvantage that its construction is not very resistant to lateral loads. Such side loads can occur when exercising or when earthquakes occur.
  • the invention is therefore based on the object of proposing a gas- or liquid-insulated current transformer in which an increase in the mechanical strength is achieved with comparatively simple means even with lateral mechanical loads.
  • the implementation is a solid-material implementation with embedded, concentric control cylinders; the control cylinder on the outside is solid and has a flange on the outside which is fastened in the area of the connection point between the one housing and the insulator.
  • An advantage of the current transformer according to the invention is that a solid feedthrough is much easier to manufacture than a feedthrough with a plurality of insulating cylinders arranged on a holding plate.
  • a plastic film bushing is related Above all, however, it is advantageous in the current transformer according to the invention that a solid feedthrough is a mechanically solid structure, so that the solid external control cylinder according to the invention gives the possibility of making the current transformer according to the invention mechanically stable in the lateral direction.
  • the external control cylinder is simply provided with a flange on the outside, and this flange is fastened in the region of the connection point between the one housing and the insulator, for which only a small additional manufacturing effort is required.
  • the solid feedthrough can be, for example, a plastic foil feedthrough or a cast feedthrough.
  • the flange of the external control cylinder is attached to a fastening flange of the housing is screwed on.
  • the housing is usually equipped with such a mounting flange to mechanically connect it to the insulator.
  • the current transformer according to the invention can advantageously be designed such that the one housing is above the insulator and the further housing is below the insulator and that at least one iron core with an applied secondary winding is accommodated in the protective sheath.
  • the current transformer is designed in a head design.
  • the current transformer according to the invention can advantageously also be designed in such a way that the one housing is below the insulator and the further housing is above the insulator and that the primary winding is accommodated in the protective cover.
  • the current transformer according to the invention is designed in the manner of a pot current transformer; in this case not only the primary winding but also the iron cores with secondary windings are located in the one housing below the insulator.
  • the current transformer 1 shown is a head current transformer, because with it in a head housing 3 located above an insulator 2 not only a rod-shaped Pri forming the primary winding märleiter 4 is guided, but because there are 5 iron cores 6 and 7 with attached secondary windings 8 and 9 are also accommodated in a core shell.
  • the K e rnschale 5 is a bushing fastened with a link 10 to an inner metal tube 11 12 loading, which is made of / plastic films and consequently forming a plastic bushing.
  • the bushing 12 is controlled capacitively, ie it contains embedded concentric control cylinders. For the sake of clarity, only the outside control cylinder 13 of these control cylinders is shown, which is solid and thus forms a metal cylinder with rounded end faces.
  • a flange 14 is attached to the outside control cylinder 13. With this flange 14, the plastic film bushing 12 is screwed to a mounting flange 15 of a housing 3.
  • the mounting flange 15 is otherwise mechanically firmly connected to the upper end 16 of the insulator 2 in the usual manner.
  • the inner metal tube 11 of the plastic film bushing 12 extends to a further housing 17, which forms a foot housing in the exemplary embodiment shown.
  • the inner metal tube 11 is provided with a support flange 16 which has threaded bores 19.
  • the inner metal tube 11 stands on a holding plate 20, which has a central recess 21 for receiving an extension 22 of the metal tube 11.
  • Through holes 23 aligned with the threaded bores 19 are provided in the holding plate 20 so that the inner metal tube 11 can be screwed onto the holding plate 20 by means of screws 24.
  • the core shell 5 with the iron cores 6 and 7 is thus carried via the inner metal tube of the bushing 12 by a holding plate 20 of a further housing 17 and is supported against the plastic film bushing 12 by a flange 14 on a solid, external control cylinder lateral stress secured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)
EP81730028A 1980-03-27 1981-03-09 Transformateur de courant, isolé au gaz ou par liquide Withdrawn EP0037366A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3012164 1980-03-27
DE19803012164 DE3012164A1 (de) 1980-03-27 1980-03-27 Gas- oder fluessigkeitsisolierter stromwandler

Publications (1)

Publication Number Publication Date
EP0037366A1 true EP0037366A1 (fr) 1981-10-07

Family

ID=6098698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81730028A Withdrawn EP0037366A1 (fr) 1980-03-27 1981-03-09 Transformateur de courant, isolé au gaz ou par liquide

Country Status (3)

Country Link
EP (1) EP0037366A1 (fr)
BR (1) BR8101821A (fr)
DE (1) DE3012164A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135527A (en) * 1983-02-11 1984-08-30 Philips Nv High-frequency coil comprising connection pins
CN102064014A (zh) * 2010-12-06 2011-05-18 保定天威集团有限公司 一种多匝倒立式电流互感器
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2554143A1 (de) * 1975-11-28 1977-06-02 Siemens Ag Spannungswandler fuer hohe spannungen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2554143A1 (de) * 1975-11-28 1977-06-02 Siemens Ag Spannungswandler fuer hohe spannungen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135527A (en) * 1983-02-11 1984-08-30 Philips Nv High-frequency coil comprising connection pins
CN102064014A (zh) * 2010-12-06 2011-05-18 保定天威集团有限公司 一种多匝倒立式电流互感器
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

Also Published As

Publication number Publication date
DE3012164A1 (de) 1981-10-08
BR8101821A (pt) 1981-09-29

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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

Designated state(s): AT CH GB IT SE

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: 19820913

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KERSTEN, KLAUS-DIETER, DIPL.-ING.

Inventor name: BAHR, RUDOLF

Inventor name: STENZEL, PETER, ING. GRAD.