EP0654803B1 - Transformateur électrique - Google Patents

Transformateur électrique Download PDF

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Publication number
EP0654803B1
EP0654803B1 EP94116686A EP94116686A EP0654803B1 EP 0654803 B1 EP0654803 B1 EP 0654803B1 EP 94116686 A EP94116686 A EP 94116686A EP 94116686 A EP94116686 A EP 94116686A EP 0654803 B1 EP0654803 B1 EP 0654803B1
Authority
EP
European Patent Office
Prior art keywords
core
voltage
coil
primary coil
coils
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
EP94116686A
Other languages
German (de)
English (en)
Other versions
EP0654803A1 (fr
Inventor
Erwin Dipl.-Ing. Reichl
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.)
Schneider Electric Sachsenwerk GmbH
Original Assignee
Sachsenwerk AG
AEG Sachsenwerk GmbH
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 Sachsenwerk AG, AEG Sachsenwerk GmbH filed Critical Sachsenwerk AG
Publication of EP0654803A1 publication Critical patent/EP0654803A1/fr
Application granted granted Critical
Publication of EP0654803B1 publication Critical patent/EP0654803B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/24—Voltage transformers
    • H01F38/26—Constructions

Definitions

  • the invention relates to an inductive electrical Voltage converter according to the preamble of the first claim.
  • a voltage converter of this type is from CH-A-240 528 known.
  • This version requires due to the application an electrically conductive magnetic core an insulation layer between the core and the primary and secondary coils whose Thickness must be selected according to the high voltage to be measured got to.
  • the magnetic circuit is not closed, so that this transducer has a high magnetic leakage flux, the necessary to electric smog and high excitation currents leads.
  • the use of an also determines the overall arrangement covering hood additional air gaps compared to the Windings with the risk of glow discharges in them.
  • the hood must also have an open end End plate are provided.
  • the invention is based, with one Voltage converter according to the preamble of the first claim To take measures through which a simple structure Reduction of the construction volume and a high mechanical as well electrical stability is achieved.
  • the outer legs of the core parts enclose the Coils at least over part of their circumference and can be designed as a potted core.
  • the invention is based on the sketches of a Embodiment explained in more detail.
  • An inductive electrical converter which is preferred for voltage measurement in medium-voltage networks is suitable, has one for AC operation suitable soft magnetic core 1, the one Primary winding 2 and a secondary winding 3 assigned are.
  • the perpendicular or perpendicular to the grounded Mounting surface of the primary winding is at Voltage transformers to the one to be measured High voltage and on the other hand at ground potential turned on while the secondary winding on Low voltage signal for measuring or control purposes.
  • the magnetic core 1 from one though magnetically well-conductive magnetic material, but one very low electrical conductivity so high has electrical resistance. It is suitable for this in particular a ferrite based in particular on Nickel-zinc cobalt-iron oxides is built up.
  • the magnetic core 1 consists of continuous same magnetic material that has a low electrical Has conductivity.
  • the vertical or perpendicular to the grounded mounting surface or Base 7 standing primary coil this Voltage converter like a Chamber coil built, in which the winding wire in a bobbin 4 divided into individual chambers is wrapped up.
  • the individual chambers are in axial direction of the primary coil 2 side by side, the Winding wire from a coil end 5 initially in an axially first terminal chamber of the coil former 4 is wrapped.
  • With sufficient filling of the first Chamber becomes the winding wire to the next second Chamber led and after their sufficient wrapping continue from chamber to chamber until the primary winding assigned last chamber of the bobbin with the required number of turns is provided.
  • the Potential distribution in the primary winding thus increases essentially step-by-step from high voltage upper winding end 5 to the lower to ground potential laying end of winding 6 over the axial length.
  • the magnetic core which acts like electrical insulating material
  • the lower, uninsulated one will not Base 7 of the magnetic core 1 applied ground potential dragged into the area of the upper winding end. Rather, the magnetic core acts over its entire length as electrical insulator, so that additional Isolation measures can be largely minimized.
  • the secondary winding 3 which is from the same magnetic core 1 is included.
  • the secondary winding is there adjacent to the winding connection 6 to be connected to ground arranged so that any intermediate electrical Insulating layer 8 only to the voltage potential of the Secondary winding needs to be coordinated.
  • the magnetic core according to FIGS. 1 to 2 consists of two with their open sides abutting and in their Shape E-shaped core parts, the middle leg 1.13 Immerse centrally in the primary or secondary winding 2,3 and the outer legs 1.11, 1.12 these windings 2.3 enclose at least part of their circumference. Should in contrast to the embodiment according to FIG. 2 a full one Enclosure of the windings 2,3 take place, then for the Core parts used pot cores.
  • the voids between the Core 1 and the windings 2,3 and also the outside free surfaces of these parts with flowable, curing insulating material 9 tight and bubble-free or cast around.
  • the base 7 can be without Insulation layer remain.
  • the outer insulating layer 9 can at the same time with circumferential, radially outwards directed ribs 10 are provided, which the Insulating section between one in the upper end 11 of the Poured insulating layer, with the upper winding end 5 connected connecting element 12 and the base 7th extend.
  • the outer insulating layer 9 can in addition Provide a terminal box 13 in the area of their jacket be of the necessary terminals for the Secondary winding 3 and possibly for the earth connection 6 Primary winding 2 takes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Coils Of Transformers For General Uses (AREA)

Claims (2)

  1. Transformateur de tension électrique inductif destiné à la moyenne tension, comprenant un enroulement primaire (2) qui est conformé à la manière d'une bobine à chambres, avec un potentiel de tension diminuant par degrés, lors du fonctionnement, le long de la longueur axiale de la bobine en partant de l'extrémité de l'enroulement primaire se trouvant à la haute tension jusqu'à l'extrémité de l'enroulement secondaire se trouvant au potentiel de la masse, un enroulement secondaire (3) qui se trouve dans le prolongement de l'enroulement primaire (2) conduisant la haute tension et qui est galvaniquement séparé de l'enroulement primaire (2) et un noyau magnétique doux (1) qui couple l'enroulement primaire (2) avec l'enroulement secondaire (3), dans lequel l'enroulement primaire (2) doit être raccordé, à son extrémité voisine de l'enroulement secondaire (3), au potentiel de masse,
       caractérisé
       en ce que le noyau (1) est constitué de deux parties de noyau adjacentes par leurs faces ouvertes et présentant en section la forme d'un E et, dans son ensemble, d'un matériau conducteur du point de vue magnétique et présentant une résistance électrique élevée, en ce que les branches médianes (1.13) des parties de noyau pénètrent centralement dans l'enroulement primaire (2) et l'enroulement secondaire (3) et les branches extérieures (1.11 ; 1.12) entourent ces enroulements (2, 3) sur une partie de leur périphérie et en ce que le noyau (1) et les enroulements (2, 3) sont recouverts, au moins dans la zone de la surface d'enveloppe et sur la partie de noyau disposée du côté haute tension par un matériau isolant (9) fluide à durcissement.
  2. Transformateur de tension selon la revendication 1,
       caractérisé
       en ce que le noyau (1) est garni, dans la zone des enroulements (2, 3), d'un matériau isolant fluide à durcissement.
EP94116686A 1993-11-24 1994-10-22 Transformateur électrique Expired - Lifetime EP0654803B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4340020A DE4340020A1 (de) 1993-11-24 1993-11-24 Induktiver elektrischer Wandler
DE4340020 1993-11-24

Publications (2)

Publication Number Publication Date
EP0654803A1 EP0654803A1 (fr) 1995-05-24
EP0654803B1 true EP0654803B1 (fr) 1998-01-07

Family

ID=6503316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94116686A Expired - Lifetime EP0654803B1 (fr) 1993-11-24 1994-10-22 Transformateur électrique

Country Status (2)

Country Link
EP (1) EP0654803B1 (fr)
DE (2) DE4340020A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103282982A (zh) * 2011-01-05 2013-09-04 Abb技术有限公司 变压器绕组

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103558440B (zh) * 2013-10-22 2016-03-02 江苏靖江互感器厂有限公司 一种智能化电子式电压互感器
CN104157437B (zh) * 2014-08-07 2017-02-15 正泰电气股份有限公司 一种容性阻抗环氧树脂浇注绝缘电磁式电压互感器

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE280418C (fr) *
GB141232A (en) * 1919-06-05 1920-04-15 Vickers Ltd Improvements in or relating to electric transformers
CH240528A (de) 1944-01-05 1945-12-31 Isaak Dr Goldstein Transformator, insbesondere Spannungswandler, mit offenem Eisenkern.
DE1003849B (de) * 1953-12-12 1957-03-07 Philips Nv Transformator fuer hohe, insbesondere impulsartige Sekundaerspannung
DE1674433U (de) * 1954-01-25 1954-04-01 Friedrich Raupach Einleiter-stromwandler, insbesondere fuer niederspannung.
US3138742A (en) * 1962-02-13 1964-06-23 Jr Edmund O Schweitzer Means for measuring current flow in and voltage of a high voltage alternating current conductor
DE2348397B2 (de) * 1973-09-24 1979-01-11 Siemens Ag, 1000 Berlin Und 8000 Muenchen Induktiver Spannungswandler
DE2554143A1 (de) * 1975-11-28 1977-06-02 Siemens Ag Spannungswandler fuer hohe spannungen
DE3218823C2 (de) * 1982-04-22 1984-06-20 LGZ Landis & Gyr Zug AG, Zug Meßwandleranordnung mit zwei Magnetkernen
SU1488887A1 (ru) * 1987-10-30 1989-06-23 Ki Polt I Электромагнитный трансформатор напряжения
DE3803846A1 (de) * 1988-02-09 1989-08-17 Bernd Dipl Ing Sommer Hochspannungs-prueftransformator mit isolierten kernsegmenten
FR2638277A1 (fr) * 1988-10-21 1990-04-27 Orega Electro Mecanique Transformateur de puissance a echauffement reduit
DE3913558A1 (de) * 1989-04-25 1990-11-08 Schroff Gmbh Ferrittransformator mit mindestens einer primaeren und einer sekundaeren wicklung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103282982A (zh) * 2011-01-05 2013-09-04 Abb技术有限公司 变压器绕组
CN103282982B (zh) * 2011-01-05 2016-03-30 Abb技术有限公司 变压器绕组

Also Published As

Publication number Publication date
DE59404946D1 (de) 1998-02-12
DE4340020A1 (de) 1995-06-01
EP0654803A1 (fr) 1995-05-24

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