US3611227A - Transformer with tubular conductor coil - Google Patents

Transformer with tubular conductor coil Download PDF

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Publication number
US3611227A
US3611227A US16444A US3611227DA US3611227A US 3611227 A US3611227 A US 3611227A US 16444 A US16444 A US 16444A US 3611227D A US3611227D A US 3611227DA US 3611227 A US3611227 A US 3611227A
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US
United States
Prior art keywords
conductor
tubular
flat conductor
coil
insulating
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 - Lifetime
Application number
US16444A
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English (en)
Inventor
Jean Trabut
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.)
Alstom Savoisienne SA
Original Assignee
Alstom Savoisienne SA
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 Alstom Savoisienne SA filed Critical Alstom Savoisienne SA
Application granted granted Critical
Publication of US3611227A publication Critical patent/US3611227A/en
Anticipated expiration legal-status Critical
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    • 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

Definitions

  • Its primary winding consists of a tubular coil which is cooled by the circulation of insulating liquid, such as a suitable oil, through the tubular coil.
  • insulating liquid such as a suitable oil
  • An elongated tubular portion of the coil is separated into inlet and outlet channels for the cooling oil by an elongated flat conductor positioned within the tubular portion and insulated therefrom.
  • the present invention relates to a high-tension strong-current transformer immersed in an insulating liquid inside a container and, more particularly, to such a transformer having a new and improved primary winding construction.
  • the current lead-in wires consist of two coaxial conducting tubes so that the inside of the central tube and the space between the two tubes act as a canal for supplying and evacuating the cooling liquid circulating by thermosiphon action in the tubular coil of the primary winding.
  • the connection of the two coaxial tubes at the ends of the tubular conducting coil requires costly machining. The present invention overcomes this disadvantage.
  • the transformer of the present invention comprises a primary winding in the form of a tubular conducting coil which forms a turn galvanically interrupted by an insulating sleeve.
  • One of the ends of the coil is electrically connected to a rectilinear tubular conductor, and the other end is electrically connected to a flat conductor which is kept in place inside the rectilinear tubular conductor by insulating elements, so as to divide the inside of this tubular conductor into two enclosures through which the insulating liquid is brought into the tubular coil and is evacuated from the latter into the receptacle of the transformer.
  • the insulating elements which keep the flat conductor in position are bars which extend all along the rectilinear tubular conductor, each having a groove in which an edge of the flat conductor is mounted.
  • the said rectilinear tubular conductor is cut at its upper part along half of its cross section so that the two enclosures, separated inside the tube by the flat conductor, open out into the receptacle at different levels at which the density of the liquids is different.
  • the said flat conductor consists of several conductors transposed in relation to one another along their length, to reduce the skin effect.
  • FIG. 1 is a sectional view of an elevation of a primary winding according to the invention.
  • FIG. 2 is a plan view of the primary winding shown in FIG. 1.
  • FIG. 3 is a side elevational view of the flat conductor formed of several conductors grouped together in parallel in a transposed bundle.
  • the current transformer is immersed in an insulating liquid 10 inside a container 11.
  • the primary winding shown in FIGS. 1 and 2 comprises a single turn consisting of a tubular conductor coil 1 which is interrupted at 2 by an insulating sleeve, and is soldered or otherwise connected at 10 to the inner end of the flat conductor 4.
  • the current lead-in wires consist, on the one hand, of a tubular conductor 3, and, on the other, of the elongated flat conductor 4, isolated from the tube 3 by a pair of elongated insulating bars 5 which each have a groove in which an edge of the flat conductor is mounted.
  • the flat conductor 4 IS arranged so as to dlvlde the inside of the tube 3 into two enclosures 6 and 7 in which cooling oil can circulate.
  • the tube 3 is cut at its upper end along half its cross section, on part of its length so that the interior enclosure 6 opens out at 8 at a level lower than the interior enclosure 7 which opens at 9.
  • the density of the oil in the receptacle is higher at the level of opening 8 than at the level of opening 9.
  • the flat conductor 4 can consist of a single conductor having a rectangular cross section as shown in FIG. 2.
  • the conductor 4 can, to great advantage, consist of several insulated conductors 4a grouped together, in parallel, in a transposed bundle to reduce the skin effect, as shown in FIG. 3.
  • a current transformer immersed in an insulating liquid inside a receptacle, whose primary winding consists of a tubular conducting coil
  • the tubular coil forms a turn which is galvanically interrupted by an insulating sleeve, one end of said turn being electrically connected to a rectilinear tubular conductor, and the other end of said turn being electrically connected to a substantially flat conductor which is mounted inside the rectilinear tubular conductor by means of insulating elements so as to divide the inside of the said rectilinear conductor into two enclosures through which the insulating liquid is brought into the tubular coil and is evacuated from it into the receptacle of the transformer.
  • a current transformer according to claim 1, wherein the insulating elements which keep the flat conductor in place are bars which extend all along the length of the rectilinear tubular conductor and each has a groove in which an edge of the flat conductor is mounted.
  • a current transformer according to claim I wherein the said flat conductor comprises a plurality of insulated conductors grouped in parallel in a bundle, where the said conductors are transposed along their length so as to reduce the skin effect.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Transformers For Measuring Instruments (AREA)
US16444A 1969-03-07 1970-03-04 Transformer with tubular conductor coil Expired - Lifetime US3611227A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6906347A FR2034278A1 (xx) 1969-03-07 1969-03-07

Publications (1)

Publication Number Publication Date
US3611227A true US3611227A (en) 1971-10-05

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ID=9030253

Family Applications (1)

Application Number Title Priority Date Filing Date
US16444A Expired - Lifetime US3611227A (en) 1969-03-07 1970-03-04 Transformer with tubular conductor coil

Country Status (4)

Country Link
US (1) US3611227A (xx)
BE (1) BE746716A (xx)
DE (1) DE2008868A1 (xx)
FR (1) FR2034278A1 (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686598A (en) * 1970-12-14 1972-08-22 Hitachi Ltd Current transformer
US4447670A (en) * 1982-04-09 1984-05-08 Westinghouse Electric Corp. High-current cryogenic leads
US4467306A (en) * 1981-12-23 1984-08-21 Mitsubishi Denki Kabushiki Kaisha High voltage current transformer having coils immersed in dielectric fluid

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2075380A (en) * 1935-03-13 1937-03-30 Farnsworth Television Inc Means for modulating high frequency currents
US2841679A (en) * 1956-09-06 1958-07-01 Yamazaki Jumei Dynamic autoclave for the continuous treating of ores under high temperature and high pressure in the vicinity of the critical temperature of water
GB1002388A (en) * 1963-07-18 1965-08-25 Philips Electronic Associated Improvements in and relating to inductors for use in high-frequency heating apparatus
US3299383A (en) * 1965-11-04 1967-01-17 Westinghouse Electric Corp Current transformer having fluid carry passages in high voltage conductor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2075380A (en) * 1935-03-13 1937-03-30 Farnsworth Television Inc Means for modulating high frequency currents
US2841679A (en) * 1956-09-06 1958-07-01 Yamazaki Jumei Dynamic autoclave for the continuous treating of ores under high temperature and high pressure in the vicinity of the critical temperature of water
GB1002388A (en) * 1963-07-18 1965-08-25 Philips Electronic Associated Improvements in and relating to inductors for use in high-frequency heating apparatus
US3299383A (en) * 1965-11-04 1967-01-17 Westinghouse Electric Corp Current transformer having fluid carry passages in high voltage conductor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686598A (en) * 1970-12-14 1972-08-22 Hitachi Ltd Current transformer
US4467306A (en) * 1981-12-23 1984-08-21 Mitsubishi Denki Kabushiki Kaisha High voltage current transformer having coils immersed in dielectric fluid
US4447670A (en) * 1982-04-09 1984-05-08 Westinghouse Electric Corp. High-current cryogenic leads

Also Published As

Publication number Publication date
BE746716A (fr) 1970-09-02
DE2008868A1 (de) 1970-09-24
FR2034278A1 (xx) 1970-12-11

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