US3921113A - Single-conductor transformer for high-voltage installations - Google Patents

Single-conductor transformer for high-voltage installations Download PDF

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Publication number
US3921113A
US3921113A US470903A US47090374A US3921113A US 3921113 A US3921113 A US 3921113A US 470903 A US470903 A US 470903A US 47090374 A US47090374 A US 47090374A US 3921113 A US3921113 A US 3921113A
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US
United States
Prior art keywords
transformer
fastening
tube member
metal
conductor
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
US470903A
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English (en)
Inventor
Heinz Schiemann
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
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Application granted granted Critical
Publication of US3921113A publication Critical patent/US3921113A/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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/0356—Mounting of monitoring devices, e.g. current transformers

Definitions

  • a single-conductor transformer for installation in the metal encapsulation of a fluid-insulated, high-voltage installation has at least one iron core with a secondary winding system mounted thereon.
  • the iron core with its secondary winding system is disposed within a cylindrical, grounded metallic shield with rounded endfaces and the transformer is arranged inside the metal encapsulation.
  • the metallic shield can be made up of a metal tube which is connected at its one end by means of a fastening shoulder with a fastening projection at the metal encapsulation and at its other end, by means of a further fastening shoulder to a support element which is supported at the metal encapsulation.
  • the iron core with a secondary winding system mounted thereon is supported by the metal tube.
  • the invention concerns a single-conductor transformer for installation in a cylindrical part of a metal encapsulation of a gas-insulated or liquid-insulated high-voltage installation.
  • the transformer has at least one iron core with a secondary winding system mounted thereon which is disposed within a cylindrical, grounded metallic shield with rounded end-faces inside the metal encapsulation.
  • the metallic shield consists of a semi-conducting layer which is applied on an enclosure of electrically insulating material which surrounds cores and secondary windings of the known transformers on all sides.
  • the enclosure of the known transformer is rounded in its end-face regions to form an equipotential surface of the electric field.
  • the transformer includes at least one iron core with a secondary winding system mounted thereon which is carried by the metal tube.
  • the primary advantage of the single-conductor transformer according to the invention is that no mechanical stresses are exerted on the iron cores because of the absence of an enclosure for the cores and the secondary windings so that permeability changes and therefore, current error changes are avoided.
  • Such an enclosure is usually made of cast resin.
  • a further advantage is seen in the fact that because of the attachment of the iron cores at the metal tube, the transformers are accessible at any time because of the absence of an enclosure and it is therefore possible to adjust turns even during the installation of the single-conductor transformer in the high-voltage installation.
  • the iron core can preferably be attached at the metal tube by means of a mounting element.
  • the mounting element can be configured as a single ring or may also consist of several rod-like elements which are preferably attached uniformly distributed over the circumference of the iron cores,
  • the mounting element of the iron cores can be attached at the metal tube by welding; or, the mounting elements can be bolted to the metal tube. However, in this latter instance, it is essential that at no point there exist weak insulation in the interior of the metal tube due to a screw connection.
  • the iron cores can also be 2 cemented to the metal tube with the interposition of in sulating pieces.
  • the iron core can also be held advantageously to the metal tube by a clamping arrangement.
  • the clamping arrangement need not consist only of pressure screws, but a clamping device may also be used which is equipped with wedge-like elements instead of pressure screws.
  • the metal tube of the single-conductor transformer according to the invention can be configured in different ways. It may, for instance, consist of a single metal tube which is enlarged at both ends so as to form rounded end-faces. Such a metal tube, however, will usually be used only if cut tape-cores are used as the iron cores for the single-conductor according to the invention.
  • the metal tube is advantageously composed of several parts.
  • the metal tube can preferablyconsist ofa center section with two outer parts having rounded end-surfaces.
  • the fastening shoulders at the center section and the fastening tabs at the outer parts are clamped, for manufacturingreasons, together with-the support element or the connect ing member, respectively, the connecting member being attached at the fastening projection of the metal encapsulation.
  • the support element as well as the connecting member can be made as a washer; but it is also possible to make these parts of individual elements which are distributed over the circumference of the metal tube preferably uniformly. The same applies to the fastening shoulders and the fastening projections.
  • FIG. 1 is a schematic diagram, partially in section, showing the single-conductor transformer according to the invention mounted in the metal encapsulation of a high-voltage installation.
  • FIG. 2 is a schematic diagram, also partially in section, illustrating an alternate embodiment of the singleconductor transformer according to the invention.
  • a high-voltage conductor 3 is arranged in an encapsulating metal enclosure 1, of which a section is shown, of a high-voltage switching installation 2.
  • the high-voltage conductor 3 is surrounded by a metal tube 4, which consists of a tube part 5 with a rounded end-face 6 and a further tube part 7 with a rounded end-face 8; both tube parts 5 and 7 are connected with each other by a welded seam 9.
  • the metal tube 4 has a fastening shoulder 10, and at its rounded end-face 8 a further fastening shoulder 11.
  • the fastening shoulder 10 is connected, for instance, by several screws to a fastening projection 12 of metal, which is welded to the metal enclosure 1.
  • a support element 13 of insulating material, which rests againstthe metal encapsulation 1, is bolted to the further fastening shoulder 11;
  • the holes provided in the fastening shoulderslO and 11 and in the fastening projection 12 and the support element 13, respectively,- for receiving the screws are made advantageously larger than the shank diameter of these screws to make centering of the metal tube 4 during the installation into the metal enclosure 1 possible.
  • the metal tube 4 is metallically connected with the metal enclosure 1 via the fastening shoulder and the fastening projection 12 and is thereby grounded.
  • the single-conductor transformer shown in FIG. 1 contains two iron cores 14 and 15, each of which support aisecondary winding system 14 and 15. At each iron core 14, 15, a holding element 18, 19 is arranged which is fastened to the metal tube 4 by means of a welded joint.
  • the secondary leads 20 and 21 of the secondary winding systems 16 and 17 are brought out of the metal enclosure 1 in a manner not shown.
  • a highvoltage conductor 32 is again arranged in an encapsulating metal enclosure of a high-voltage switching installation 31.
  • the high-voltage conductor 32 is surrounded by a metal tube 33 consisting of a center tube part 34 andan outer part 35 as well as a further outer part 3'6. While the center :tube part 34 is of circular cross -seetion throughout, the outer parts 35 and 36 are provided withrounded end-faces 37 and 38.
  • the outer parts 35 arid 36 are provided at their ends facing the centerltube part 34 with bent-off flanges 39 and 40. The bentoff flanges 39 and 40 form fastening tabs.
  • the fastening tab 39 has opposite it afastening shoulder 41 at the center tube part 34, and the fastening tab 40 has opposite it afurther fastening shoulder 42 at the center section 34.
  • a connecting element 43 of metal which is connected to a fastening projection 44 at the metal enclosure 30.
  • the fastening tab 39, the connecting element 43 and the fastening projection 41 are clamped together by threaded bolts 45 with nuts.
  • a support element 46 of insulating material is connected by threaded bolts 47 and nuts with the further fastening shoulder 42 and the fastening tab 40.
  • the metal tube 33 is not only held in the metal encapsulation 30, but at the same time the outer parts 35 and 36 are connected with the center tube part 34 of the metal tube 33.
  • the metal tube 33 which is grounded through the connecting element 43, then forms an equipotential surface.
  • iron cores 48 and 49 are arranged at the outside surface of the metal tube 33.
  • the iron cores 48 and 49 are provided with pressure pieces 51, 53 and 54, which transmit pressure forces caused by a bracing device 55 onto the fastening shoulders 41 and 42.
  • the bracing device 55 which may consist, for instance, of clamping means in the form of pressure screws, the iron cores 48 and 49 are braced between the fastenin shoulders 41 and 42 and are thereby held on the metal tube 33.
  • a single-conductor transformer for installation and use in a fluid-insulated, high-voltage installation comprising a metal enclosure, a grounded metal shielding tube member having rounded end-faces and being disposed inside the metal enclosure; first mounting means disposed at one end of said tube member attaching the same to the metal enclosure, said first mounting means comprising a first fastening shoulder coupled to and extending from said tube member at said one end thereof, and a fastening projection coupled to and extending from the inner wall of the metal enclosure, said fastening shoulder being connected to'said fastening projection; second mounting means disposed at the other end of said tube member in engagement with 'said inner wall of said enclosure supporting said tube member with respect to the metal enclosure, said' second mounting means'comprising a second fastening shoulder coupled to and extending from said tube member at said other end thereof, and a support element disposed in engagement with the inner wall of said enclosure, said second fastening shoulder being connected to said support element supporting said tube member within said enclosure; at least one transformer core unit including an iron
  • said third mounting means comprising a holding element 7 mounted on said iron core of said transformer core unit for securing said transformer core unit to said tube member.
  • said third mounting means comprising clamping means for clamping said iron core of said transformer core unit between said fastening shoulders of said first and second mounting means respectively.
  • said clamping means comprising a plurality of pressure screws.
  • said tube member comprising a center tube part and two outer parts connected to respective ends of said center tube part, each of said outer parts having a rounded end-face facing away from said center tube part.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Gas-Insulated Switchgears (AREA)
US470903A 1973-05-17 1974-05-17 Single-conductor transformer for high-voltage installations Expired - Lifetime US3921113A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2325450A DE2325450A1 (de) 1973-05-17 1973-05-17 Einleiterwandler fuer hochspannungsschaltanlagen

Publications (1)

Publication Number Publication Date
US3921113A true US3921113A (en) 1975-11-18

Family

ID=5881442

Family Applications (1)

Application Number Title Priority Date Filing Date
US470903A Expired - Lifetime US3921113A (en) 1973-05-17 1974-05-17 Single-conductor transformer for high-voltage installations

Country Status (8)

Country Link
US (1) US3921113A (sh)
JP (2) JPS509718A (sh)
AT (1) AT342707B (sh)
CH (1) CH568646A5 (sh)
DE (1) DE2325450A1 (sh)
FR (1) FR2230055B1 (sh)
GB (1) GB1461488A (sh)
NL (1) NL7405838A (sh)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2373874A1 (fr) * 1976-12-11 1978-07-07 Leybold Heraeus Gmbh & Co Kg Dispositif d'alimentation de canons electroniques
DE3247383A1 (de) 1982-12-10 1984-06-14 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Stromwandler
US4471333A (en) * 1981-04-28 1984-09-11 Sprecher & Schuh Ag Current transformer with a ring-shaped core for use in a high voltage switching device enclosed in a metallic casing
US4689546A (en) * 1985-12-18 1987-08-25 General Electric Company Internal armature current monitoring in large three-phase generator
US5307043A (en) * 1992-09-14 1994-04-26 Square D Company Transformer assembly with improved retainer and insulator
US5504419A (en) * 1992-04-03 1996-04-02 Moser-Glaser & Co. Ag Rod-core current transformer
US6760206B2 (en) 2001-03-16 2004-07-06 Cooper Industries, Inc. Current sensor supporting structure
US20100134957A1 (en) * 2008-12-02 2010-06-03 Mitsubishi Electric Corporation Gas-Insulated Switchgear Apparatus
US20140232509A1 (en) * 2011-04-14 2014-08-21 Abb Technology Ag Electrostatic shield for a transformer
CN107924753A (zh) * 2015-09-03 2018-04-17 西门子公司 测量用变换器的轮辋电极和绕组装置
US10304621B2 (en) * 2017-01-24 2019-05-28 Lear Corporation Bobbin with electromagnetic interference shield for electromagnetic device

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2524547C2 (de) * 1975-05-30 1989-09-21 Siemens AG, 1000 Berlin und 8000 München Einleiterwandler für metallgekapselte Hochspannungsschaltanlage
JPS58130465U (ja) * 1982-02-25 1983-09-03 株式会社シマノ 両軸受リ−ル
JPS58146226A (ja) * 1982-02-25 1983-08-31 株式会社シマノ 両軸受リ−ル
JPS58130464U (ja) * 1982-02-25 1983-09-03 株式会社シマノ 両軸受リ−ル
JPH0328776Y2 (sh) * 1984-10-31 1991-06-20
JPH0328771Y2 (sh) * 1984-10-31 1991-06-20
JPH0239667U (sh) * 1988-09-12 1990-03-16

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2214915A (en) * 1936-02-18 1940-09-17 Lorenz C Ag High frequency current transformer
US2701335A (en) * 1950-11-21 1955-02-01 Gen Motors Corp Electrical pickup
US2862194A (en) * 1953-05-06 1958-11-25 Gen Electric Electric protective equipment
US3380009A (en) * 1967-03-10 1968-04-23 Gen Electric High voltage current transformer
US3456222A (en) * 1968-04-25 1969-07-15 Gen Electric High voltage current transformer
US3525908A (en) * 1966-11-29 1970-08-25 Licentia Gmbh Spreader-type current transformer
US3629759A (en) * 1970-05-20 1971-12-21 Rucker Co Coupling transformer assembly
US3835429A (en) * 1972-02-07 1974-09-10 Siemens Ag Current transformer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4930750U (sh) * 1972-06-23 1974-03-16

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2214915A (en) * 1936-02-18 1940-09-17 Lorenz C Ag High frequency current transformer
US2701335A (en) * 1950-11-21 1955-02-01 Gen Motors Corp Electrical pickup
US2862194A (en) * 1953-05-06 1958-11-25 Gen Electric Electric protective equipment
US3525908A (en) * 1966-11-29 1970-08-25 Licentia Gmbh Spreader-type current transformer
US3380009A (en) * 1967-03-10 1968-04-23 Gen Electric High voltage current transformer
US3456222A (en) * 1968-04-25 1969-07-15 Gen Electric High voltage current transformer
US3629759A (en) * 1970-05-20 1971-12-21 Rucker Co Coupling transformer assembly
US3835429A (en) * 1972-02-07 1974-09-10 Siemens Ag Current transformer

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2373874A1 (fr) * 1976-12-11 1978-07-07 Leybold Heraeus Gmbh & Co Kg Dispositif d'alimentation de canons electroniques
US4143272A (en) * 1976-12-11 1979-03-06 Leybold-Heraeus Gmbh & Co. Kg Power supply for electron beam guns
US4471333A (en) * 1981-04-28 1984-09-11 Sprecher & Schuh Ag Current transformer with a ring-shaped core for use in a high voltage switching device enclosed in a metallic casing
DE3247383A1 (de) 1982-12-10 1984-06-14 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Stromwandler
US4689546A (en) * 1985-12-18 1987-08-25 General Electric Company Internal armature current monitoring in large three-phase generator
US5504419A (en) * 1992-04-03 1996-04-02 Moser-Glaser & Co. Ag Rod-core current transformer
US5307043A (en) * 1992-09-14 1994-04-26 Square D Company Transformer assembly with improved retainer and insulator
US6760206B2 (en) 2001-03-16 2004-07-06 Cooper Industries, Inc. Current sensor supporting structure
US6858172B2 (en) 2001-03-16 2005-02-22 Cooper Industries, Inc. Current sensor supporting structure
US20100134957A1 (en) * 2008-12-02 2010-06-03 Mitsubishi Electric Corporation Gas-Insulated Switchgear Apparatus
US8189323B2 (en) * 2008-12-02 2012-05-29 Mitsubishi Electric Corporation Gas-insulated switchgear apparatus
US20140232509A1 (en) * 2011-04-14 2014-08-21 Abb Technology Ag Electrostatic shield for a transformer
US9472337B2 (en) * 2011-04-14 2016-10-18 Abb Schweiz Ag Electrostatic shield for a transformer
CN107924753A (zh) * 2015-09-03 2018-04-17 西门子公司 测量用变换器的轮辋电极和绕组装置
US10304621B2 (en) * 2017-01-24 2019-05-28 Lear Corporation Bobbin with electromagnetic interference shield for electromagnetic device

Also Published As

Publication number Publication date
ATA321974A (de) 1977-08-15
JPS5531801Y2 (sh) 1980-07-29
GB1461488A (en) 1977-01-13
JPS552193U (sh) 1980-01-09
DE2325450A1 (de) 1974-11-21
FR2230055B1 (sh) 1980-05-30
CH568646A5 (sh) 1975-10-31
AT342707B (de) 1978-04-25
FR2230055A1 (sh) 1974-12-13
JPS509718A (sh) 1975-01-31
NL7405838A (sh) 1974-11-19

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