EP0653767B1 - Induktiver elektrischer Wandler für Mittelspannung - Google Patents
Induktiver elektrischer Wandler für Mittelspannung Download PDFInfo
- Publication number
- EP0653767B1 EP0653767B1 EP94115707A EP94115707A EP0653767B1 EP 0653767 B1 EP0653767 B1 EP 0653767B1 EP 94115707 A EP94115707 A EP 94115707A EP 94115707 A EP94115707 A EP 94115707A EP 0653767 B1 EP0653767 B1 EP 0653767B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnetic core
- disc
- core
- axial direction
- coil
- 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
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Classifications
-
- 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
-
- 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 converter according to the preamble of the first claim.
- a converter designed as a voltage converter is known (DE-A-2 843 608), which is characterized by an axial direction adjacent tubular core parts formed Magnetic core is passed through an insulating tube that is tight the front flanges of the electrical installations are gas-tight surrounding wrapping is performed. There is one on the magnetic core multilayer secondary winding wound on her External circumference separated by electrical insulation Primary winding. Is coaxial to this arrangement on the outer circumference also a cylindrical magnetic core part, which provided for an improvement of the magnetic yoke is. The cavities inside the envelope are filled with an insulating gas.
- the invention is based on the object of a converter to create the preamble of the first claim, the one reduced construction volume and its size to the electrical voltage to be measured is adaptable.
- a simple, pre-made casing for use get into which the magnetic core with the associated Windings even without the help of electrical insulating casting resins or the like. Including any cavities is set.
- the one in the wrapper Insulated gas filling introduced from SF6 or similar insulating gases reliable electrical insulation in the field of design-related cavities.
- For wrapping is just a simple tubular body made of electrical Insulating material necessary, the end faces with one each tightly attached flange are to be closed when the Magnetic core with the windings inserted in the tubular body is.
- the Primary winding is made up of several axially adjoining independent and electrically connected in series Disc coils built up, the free winding end of the an axially terminal disc coil High voltage potential and the free winding connection of the with the last disc coil axially removed Ground potential is to be connected. Adjacent to this The last disc coil is the secondary winding arranged so that only one between these two coils negligible electrical voltage potential exists, that is easy to master in terms of insulation technology. At this winding structure, it is particularly advantageous that depending on the amount of high voltage to be measured, the number of primary-side disc coils accordingly enlarged or can be reduced. Of the Magnetic core is designed in several parts to make it the necessary axial length of the primary winding including the To be able to adjust the secondary winding.
- the magnetic core consists of at least in the area of the primary winding a magnetic material that has a very low electrical Has conductivity, so as an electrical insulator works.
- the magnetic core does not form an electrical one Short circuit for the electric field between the High voltage connection and the ground connection, so that especially when connected to ground potential Magnetic core the same does not have the ground potential total axial length of the primary winding in the range of transmits high-voltage side.
- Much more the magnetic core forms electrical insulation so that which is established over the length of the primary winding Voltage drop due to capacitive coupling in particular forms on the insulating magnetic core.
- the Voltage difference between the individual sections of the Primary winding and the magnetic core is thus low, so that correspondingly small isolation distances for one safe operation is sufficient.
- the SF6 insulation in Connection with the electrically insulating magnetic core and the one that reduces the voltage drop in stages Chamber coil designed primary coil allow the Construction of a voltage converter for medium voltage in very small size.
- the invention is based on the schematic diagram of a voltage converter shown in longitudinal section explained.
- An inductive electrical voltage converter for Medium-voltage networks have a soft magnetic Magnetic core 1, which has a low magnetic remanence owns and the one primary winding of several axially lined-up disc coils 2 and another, arranged in the axial extension, as Secondary winding 3 assigned disc winding assigned is. This arrangement is within one Enclosure made of an electrically insulating tubular body 4, the end faces of each with a tightly attached flange 5 are closed.
- the wrapper 4.5 encloses the Magnetic core 1 with the windings 2,3 gas-tight, the design-related cavities in the area of the magnetic core with its windings 2, 3 and the inner casing of the sheathing 4.5 is filled with an insulating gas that has a higher Has insulation value as air and in particular Sulfur hexafluoride, i.e. SF6 or a similar insulating gas is.
- the wrapping is simple representable after only one Isolierstoffrohrab songs both ends with the particular Flanges made of metal must be sealed gas-tight by means of an interposed adhesive 6.
- the magnetic core 1 consists in particular of an electrical insulating magnetic material, preferably based of ferrites which, with good magnetic, are very low have electrical conductivity, i.e. electrical Form isolators. This will avoid that a metallic magnetic core not at every point of the assigned windings 2, 3 have the same potential, in particular earth or ground potential is introduced.
- the formation of the primary coil as Chamber coil or as an axial series of individual Disc coils that then the Voltage drop across the axial length of the disc coil too Disc coil is gradually removed to ground potential, to which the last disc coil is placed. It results thereby between the winding connections of the Primary coil a great electrically effective way that here by combining it with that as an electrical insulator acting magnetic core is not shortened.
- the secondary winding 3 is in the axial direction terminal disc coil 2.5 of the primary winding 2 arranged adjacent, the free winding terminal 7 on Ground potential is to be switched on.
- the electrical Voltage drop between the disc coil 2.5 and the Secondary winding 3 is so low that the insulation the bobbin is sufficient, on which the individual Disc coils 2.1 to 2.5 or the secondary winding 3 are wound up.
- the independent disc coils 2.1 to 2.5 enable this the voltage range to be recorded accordingly vary. It is therefore easily possible Converter structure for the voltage series for e.g. 12 kV, 24 kV or adjust 36 kV in a simple way.
- the axial end faces of the disc coils 2.1 to 2.5 with matched contact contact surfaces 8 the when the coil disks are lined up in mutual contact system and so the Series connection automatically without special aids accomplish.
- the primary coil is also the magnetic core 1 of several in Core parts 1.1 and 1.2 which can be joined together in the axial direction built up, depending on the needs between terminal Final core parts 1.3 are to be inserted.
- the Magnetic core two E-shaped in cross section Final core parts 1.3 on that with their open sides face each other and between which the windings 2,3 lie. Should the detectable Voltage range of the converter must be increased one or more additional disc coils can be used.
- one or more of the intermediate core parts 1.1 or 1.2 added.
- the intermediate core parts 1.2 inserted in the center of the disc coils, while the outer intermediate core parts 1.1 in the area of The outer circumference of the disc coils can be arranged.
- the Intermediate core parts 1.1 can be used as the disc coils encompassing rings are formed. So it can vary depending voltage range to be detected also several of the intermediate core parts 1.1 or 1.2 between the final core parts 1.3 be set.
- the multi-part magnetic core 1 axially compresses and thereby that adversely affect the magnetic flux Gaps in the magnetic circuit reduced to a minimum.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
Description
Claims (2)
- Induktiver elektrischer Wandler, insbesondere Spannungswandler für Mittelspannung, mit einem weichmagnetischen, in axialer Richtung aneinander anschließende Kernteile (1.1; 1.2; 1.3) aufweisenden Magnetkern (1) und demselben zugeordneter Primär- (2) und Sekundärwicklung (3) und mit einem den Magnetkern (1) mit den Wicklungen (2, 3) umschließenden Rohrkörper (4) der zusammen mit stirnseitig angesetzten Flanschen (5) eine Umhüllung aus festem elektrischen Isolierstoff bildet, die den Magnetkern (1) mit den Wicklungen (2, 3) allseitig gasdicht umschließt, wobei innerhalb der Umhüllung (4, 5) vorhandene Hohlräume mit einem Isoliergas, insbesondere mit SF6, gefüllt sind, dadurch gekennzeichnet, daß der Magnetkern (1) zumindest im Bereich der Primärwicklung (2) aus einem Magnetwerkstoff besteht, der eine sehr geringe elektrische Leitfähigkeit aufweist und aus zwei im Querschnitt E-förmigen Abschluß-Kernteilen (1.3) mit in axialer Richtung zwischen denselben angeordneten angepaßten Zwischen-Kernteilen (1.1; 1.2) besteht, die mit ihren offenen Seiten gegeneinander weisen und zwischen welchen die Wicklungen (2, 3) liegen, daß die Primärwicklung (2) nach Art einer Kammerspule aus mehreren axial aneinander anschließenden eigenständigen, in Serie geschalteten Scheibenspulen (2.1-2.5) aufgebaut ist, von welchen eine erste axial endständige Scheibenspule (2.1) an eine elektrische Spannungsquelle und die axial entfernteste Scheibenspule (2.5) an Massepotential anzuschließen ist und letzterer Scheibenspule (2.5) die Sekundärwicklung (3) axial benachbart zugeordnet ist, daß die Scheibenspulen (2.1-2.5) an den axialen Stirnflächen Kontaktelemente (8) aufweisen, die bei axial aneinander gefügten Scheibenspulen paarweise in Kontaktanlage treten und eine elektrische Serienschaltung der benachbarten Scheibenspulen erzeugen und daß zwischen einen Flansch (5) und einen benachbarten Abschlußkernteil (1.3) des Magnetkerns (1) eine mechanische Druckfeder (9) eingesetzt ist.
- Wandler nach Anspruch 1, dadurch gekennzeichnet, daß jeweils mehrere Zwischen-Kernteile (1.1; 1.2) in Achsrichtung aneinander gefügt sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4338537A DE4338537A1 (de) | 1993-11-11 | 1993-11-11 | Induktiver elektrischer Wandler für Mittelspannung |
DE4338537 | 1993-11-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0653767A1 EP0653767A1 (de) | 1995-05-17 |
EP0653767B1 true EP0653767B1 (de) | 1998-01-07 |
Family
ID=6502367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94115707A Expired - Lifetime EP0653767B1 (de) | 1993-11-11 | 1994-10-06 | Induktiver elektrischer Wandler für Mittelspannung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0653767B1 (de) |
DE (2) | DE4338537A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11605501B2 (en) | 2016-04-25 | 2023-03-14 | Hitachi Energy Switzerland Ag | HV apparatus and a method of manufacturing such apparatus |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2126815T3 (es) * | 1995-07-15 | 1999-04-01 | Ritz Messwandler Kg | Transformador de tension unipolar. |
DE19653827C1 (de) * | 1996-12-21 | 1998-06-18 | Vem Elektroantriebe Gmbh | Einrichtung zur Vorspülung und Erzeugung von Überdruck im Bereich des Wickelkopfes einer drehenden elektrischen Hochspannungsmaschine |
CN108183014A (zh) * | 2017-12-04 | 2018-06-19 | 国网河南省电力公司滑县供电公司 | 一种电压互感器 |
CN108305768A (zh) * | 2018-03-14 | 2018-07-20 | 珠海市新化磁性材料有限公司 | 一种高压绝缘变压器及其制作方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE602855C (de) * | 1930-12-05 | 1934-09-18 | Koch & Sterzel Akt Ges | Spannungswandler mit einem Durchfuehrungsisolator |
CH240528A (de) * | 1944-01-05 | 1945-12-31 | Isaak Dr Goldstein | Transformator, insbesondere Spannungswandler, mit offenem Eisenkern. |
DE942823C (de) * | 1954-04-16 | 1956-05-09 | Koch & Sterzel Ag | Hochspannungsseitig mit Anzapfungen versehener Hochspannungstransformator |
DE2108153A1 (de) * | 1971-02-20 | 1972-08-31 | Messwandler Bau Gmbh | Hochspannungsprüftransformator großer Leistung |
SU460022A1 (ru) * | 1972-04-04 | 1976-04-25 | Особое конструкторское бюро Института высоких температур АН СССР | Индуктивный накопитель |
FI46572C (fi) * | 1972-04-07 | 1973-04-10 | Stroemberg Oy Ab | Jännitemuuntaja. |
JPS5297121A (en) * | 1976-02-12 | 1977-08-15 | Toshiba Corp | Method of uniting tank and cover of electric apparatus |
DE2843608C2 (de) * | 1978-10-06 | 1983-09-29 | Friedrich Dr.-Ing. e.h. 8600 Bamberg Raupach | Transformator, insbesondere Spannungswandler oder Prüftransformator |
DE8014832U1 (de) * | 1980-05-30 | 1980-08-28 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Induktiver spannungswandler fuer eine vollisolierte, metallgekapselte hochspannungsschaltanlage |
DE3803846A1 (de) | 1988-02-09 | 1989-08-17 | Bernd Dipl Ing Sommer | Hochspannungs-prueftransformator mit isolierten kernsegmenten |
-
1993
- 1993-11-11 DE DE4338537A patent/DE4338537A1/de not_active Withdrawn
-
1994
- 1994-10-06 DE DE59404942T patent/DE59404942D1/de not_active Expired - Fee Related
- 1994-10-06 EP EP94115707A patent/EP0653767B1/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11605501B2 (en) | 2016-04-25 | 2023-03-14 | Hitachi Energy Switzerland Ag | HV apparatus and a method of manufacturing such apparatus |
Also Published As
Publication number | Publication date |
---|---|
EP0653767A1 (de) | 1995-05-17 |
DE59404942D1 (de) | 1998-02-12 |
DE4338537A1 (de) | 1995-05-18 |
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