EP0050317A1 - Stromwandler - Google Patents

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Publication number
EP0050317A1
EP0050317A1 EP81108359A EP81108359A EP0050317A1 EP 0050317 A1 EP0050317 A1 EP 0050317A1 EP 81108359 A EP81108359 A EP 81108359A EP 81108359 A EP81108359 A EP 81108359A EP 0050317 A1 EP0050317 A1 EP 0050317A1
Authority
EP
European Patent Office
Prior art keywords
conductor
enclosure
bypass
transformer
transformer according
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Withdrawn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
EP81108359A
Other languages
English (en)
French (fr)
Inventor
Edmond Thuries
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.)
Alsthom Atlantique SA
Original Assignee
Alsthom Atlantique 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 Alsthom Atlantique SA filed Critical Alsthom Atlantique SA
Publication of EP0050317A1 publication Critical patent/EP0050317A1/de
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to current transformers used in very high voltage installations.
  • the feeders are supervised by current transformers, such as 8 and 9 for the feeder. 3 and 10 and 11 for the start 4.
  • the feeders can be either cable heads, such as that referenced 3A in FIG. 2 which represents an embodiment of the encircled part G of the. Figure 1, or an overhead conductor which, such as that referenced 3B and shown in broken lines, starts vertically from the connection line between the two transformers 8 and 9, then is established parallel to this line.
  • An object of the invention is to provide a measuring device having the function of two current transformers while having an insulating part with respect to the single earth.
  • the subject of the invention is a current transformer comprising an insulating bushing, and an annular metal enclosure, filled with compressed gas, a primary circuit comprising an input conductor penetrating into the enclosure by the bushing and an output conductor leaving the enclosure by crossing coaxially to the first conductor, at least two cir magnetic baking each having a secondary winding, characterized in that it comprises an electrical bypass at the lower level of the metal enclosure and that the magnetic circuits are arranged on either side of this bypass.
  • the transformer of FIG. 3 borrows a large part of its elements from the transformer described in document FR-A 2467 473 of October 14, 1979.
  • the current transformer comprises an enclosure filled with compressed gas, for example sulfur hexafluoride; this enclosure comprises a metal part 11 and an insulating bushing 12, a primary conductor 13 and two magnetic circuits 14 and 15 with secondary windings; the assembly is carried by a chassis 16.
  • compressed gas for example sulfur hexafluoride
  • this enclosure comprises a metal part 11 and an insulating bushing 12, a primary conductor 13 and two magnetic circuits 14 and 15 with secondary windings; the assembly is carried by a chassis 16.
  • the metal enclosure made of alloyed aluminum consists of straight cylindrical ferrules such as 20 and 22 terminated by collars 23, O-rings 25, 26, 27, 28- (quarter-toroid) also provided with collars 29 at their ends, a lower ferrule 21 and a metal cross 30 having four openings terminated by necklaces 31; one of the openings serves as a manhole and is closed by a cover 32.
  • the lower ferrule 21, of spherical shape, has a lateral bypass 33 which leaves horizontally, as can be seen in FIG. 4.
  • the bypass is terminated by a collar 34.
  • the ferrules are assembled in a leaktight manner using seals housed in various collars 29.
  • the insulating enclosure 12 is a passage formed here of two superimposed ceramic elements 40 and 41 and provided with sealed collars 42, 43, 44, 45; a plate 46 serves as a connection between the metal enclosure 11 and the collar 46 of the lower ceramic element 40. Likewise, a plate 47 connects the two ceramic elements; a tray 48 serves as a cover for the upper ceramic element. This plate 48 carries a first socket 49, a second socket 51 isolated from the first by an insulator 50.
  • Fragrance screens 52 and 53 are placed at the level of the plates 46 and 47 ...
  • the primary conductor comprises a rectilinear part 60 and a ring.
  • the part 60 consists of two coaxial conductors 61 and 62; the conductor 61 is electrically connected to the plate 48 and to the socket 49.
  • the other conductor 62 is electrically connected to the socket 51.
  • the ring has two U-shaped parts, 63 and 64, two T-shaped parts, 65 at the bottom and 66 at the top of the ring.
  • the ring is made of conductive material of tubular shape, certain parts of the T 66 are conical so as to be able to more easily connect the left part of the ring to the external rectilinear conductor 61 and the right part of the ring to the internal rectilinear conductor 62 .
  • conductors 61 and 62 are at slightly different electrical potentials (voltage drop along the ring), and solid insulation 109 as shown in Figure 6 is sufficient.
  • the ferrules 20 and 22 each carry the magnetic circuits and their secondary windings 14 and 15 respectively, which constitute different measurement circuits, the primary conductors not necessarily having the same current flowing since the power can be taken from the T lower 65.
  • the U-shaped conductive elements have a shape allowing their passage in the quarter-toroid 25, 26, 27, 28 and in the ferrules 20 and 22; these U fit together and lock on the T 65 and 66.
  • the ferrules 20 and 22 are made of non-magnetic material and the current flowing in the metal enclosure 11 is derived at the ferrules 20 and 22 by shunts 70 and 71; insulating rings 72 and 73 galvanically isolate the collars 23 and 29 at the bottom of the ferrules 20 and 22.
  • CCG gas-insulated cable
  • This ferrule 81 is connected to the collar 33 of the ferrule 21 by a collar 34.
  • the current I3 borrows the 3rd branch of the T 65, the U 64, the central rectilinear conductor 62 located in the T 66 and coaxial with the conductor 61, and finally the socket outlet 51.
  • the transformer is thus a double transformer, this saves a insulating bushing and the corresponding square.
  • the primary conductor, in a ring, is suspended inside the metal enclosure 11 as provided for in document FR-A 2467 473 and its centering is obtained by displacement in height of the rectilinear part 60, the control of the position being provided via the inspection hole 32 or through the opening provided for the passage of 80, or possibly through a manhole such as 82 placed on the ferrule 21 opposite the opening for the passage of conductor 80.
  • the diversion can be aerial; in this case, the same crossing of the transformer can be used which will include three coaxial conductors instead of 2.
  • Figures 5, 6 and 7 illustrate this variant.
  • the ferrule 81 is replaced by a U-shaped ferrule 90 having in its middle an inspection hole shown open 91.
  • the cross 30 has an opening 92 provided with a connection collar 93.
  • the central conductor is in two pieces 94 and 95 connected at the level of the inspection hole to form a U.
  • connection of the three conductors is shown at the upper level of the current transformer in Figure 6 and at the cross in Figure 7.
  • the plate 48 (FIG. 6) has its internal diameter close to the diameter of the ceramic 41; a plate 101 has three arms distributed at 120 ° with centering pins and jacks 102 for positioning all of the conductors in the insulating enclosure 12 and in the metallic enclosure 11; a braid or foils 119 ensure the passage of current between 101 and 48; the external conductor 61 is mechanically fixed and electrically connected to the plate 101.
  • the conductor 62 coaxial with the conductor 61 is isolated from it by a crown 103 which by its external edge bears on the plate 101.
  • This conductor 62 is mechanically and electrically connected to a plate 105 having like the plate 101 three arms which will allow the means of jacks 108 for wedging the conductor 62 in height; the jacks are supported on a metal washer 104.
  • a third conductor 112 coaxial with the previous one is isolated from it by a crown 109 similar to 103 but of diameter adapted to the dimensions of the conductors; cylinders 111 resting on a metal washer 110, here again make it possible to adjust the position of the conductor 112 in height.
  • the plate 105 is connected by braids or tinsels 106 to an outlet 107 embedded in a molded insulating cylinder 113; threaded rods or bolts fix the insulation 113 on the plate 48 and a metal cover 114 on the insulation 113; the metal cover 114 has at its upper part a sealed passage for the conductor 112, and at its periphery oblong holes radially to ensure its fixing without creating stresses in the conductors 112, 62 and 61. Joints 115, 116, 117, 118 seal the compressed gas which fills the enclosure.
  • connection of the rectilinear conductors with the conductors of the ring, and the insulation between them of the rectilinear conductors, is shown in Figure 7.
  • a connection 120 which is tightened on the conductor 63 of the ring, for example. by the bolts 121.
  • This conductor 61 has opposite the fitting 120 a notch 130.
  • a connector 122 is attached at the bottom of the conductor 62 which is tightened on the conductor 64 of the ring by the bolts 123 a notch 131 is provided for the passage of a connector 126 fixed on the bottom of the conductor 112.
  • a cylindrical insulating screen 124 electrically isolates the conductors 112 and 62 and another cylindrical screen 125 insulates the conductors 62 and 61.
  • the conductor 112 is threaded through the lower part, while the conductor 61 is mounted through the upper part.
  • the lower insulating cylinders 124 and 125 bear respectively on the fittings 126 and 122.
  • the invention finds its application in the equipment of very high voltage substations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)
EP81108359A 1980-10-22 1981-10-15 Stromwandler Withdrawn EP0050317A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8022552A FR2492576A1 (fr) 1980-10-22 1980-10-22 Transformateur de courant
FR8022552 1980-10-22

Publications (1)

Publication Number Publication Date
EP0050317A1 true EP0050317A1 (de) 1982-04-28

Family

ID=9247182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108359A Withdrawn EP0050317A1 (de) 1980-10-22 1981-10-15 Stromwandler

Country Status (8)

Country Link
US (1) US4443779A (de)
EP (1) EP0050317A1 (de)
JP (1) JPS57100713A (de)
BR (1) BR8106787A (de)
CA (1) CA1177915A (de)
FR (1) FR2492576A1 (de)
IN (1) IN157063B (de)
ZA (1) ZA817246B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04138354U (ja) * 1991-06-21 1992-12-25 壽一 香月 椅 子
US5627343A (en) * 1994-08-03 1997-05-06 Xl Technologies, Inc. Re-enterable conduit sealing assembly
DE19608285A1 (de) * 1996-02-23 1997-08-28 Siemens Ag Hochspannungsfreiluftschalter
US6242902B1 (en) 1999-11-19 2001-06-05 Siemens Aktiengesellschaft Measuring configuration, and use of the measuring configuration

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1544065A (fr) * 1900-01-01 Alsthom Savoisienne Transformateur de mesure à refroidissement par circulation du fluide diélectrique
GB1134336A (en) * 1965-03-16 1968-11-20 Gen Electric Improvements in electrical apparatus insulated with a mixture of insulating gases
US3456222A (en) * 1968-04-25 1969-07-15 Gen Electric High voltage current transformer
FR2219505A1 (de) * 1973-02-28 1974-09-20 Bbc Brown Boveri & Cie

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA582095A (en) * 1959-08-25 The British Thomson-Houston Company Limited High voltage current transformers
FR1104245A (fr) * 1954-05-25 1955-11-17 Thomson Houston Comp Francaise Perfectionnements aux dispositifs de protection électrique
US2947958A (en) * 1955-07-18 1960-08-02 Gen Electric High voltage current transformer
FR1289299A (fr) * 1961-05-17 1962-03-30 Siemens Ag Perfectionnements aux transformateurs de courant montés en caseade
FR2467473A1 (fr) * 1979-10-11 1981-04-17 Alsthom Cgee Transformateur de courant pour installation a haute tension

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1544065A (fr) * 1900-01-01 Alsthom Savoisienne Transformateur de mesure à refroidissement par circulation du fluide diélectrique
GB1134336A (en) * 1965-03-16 1968-11-20 Gen Electric Improvements in electrical apparatus insulated with a mixture of insulating gases
US3456222A (en) * 1968-04-25 1969-07-15 Gen Electric High voltage current transformer
FR2219505A1 (de) * 1973-02-28 1974-09-20 Bbc Brown Boveri & Cie

Also Published As

Publication number Publication date
FR2492576A1 (fr) 1982-04-23
IN157063B (de) 1986-01-04
FR2492576B1 (de) 1983-12-16
US4443779A (en) 1984-04-17
BR8106787A (pt) 1982-07-06
JPS57100713A (en) 1982-06-23
ZA817246B (en) 1982-09-29
CA1177915A (fr) 1984-11-13

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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

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Effective date: 19830401

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Inventor name: THURIES, EDMOND