CN1244287A - Cable for an electrical winding and such a winding - Google Patents
Cable for an electrical winding and such a winding Download PDFInfo
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- CN1244287A CN1244287A CN 98801965 CN98801965A CN1244287A CN 1244287 A CN1244287 A CN 1244287A CN 98801965 CN98801965 CN 98801965 CN 98801965 A CN98801965 A CN 98801965A CN 1244287 A CN1244287 A CN 1244287A
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- 239000004020 conductor Substances 0.000 claims description 29
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
- Insulated Conductors (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
In a power cable designed for an electrical winding, such as a transformer or reactor winding, an electrically conductive core (2) is arranged in contact with an inner first semiconducting layer (4) surrounding the core. A first insulating layer (6) is disposed around the first semiconductor layer on the outside thereof. An outer second semiconducting layer (8) is arranged around the first insulating layer (6) on the outside thereof. Means (16,18) are also provided outside the second semiconducting layer (8) for continuously grounding the cable along a major part of its length for alternating and/or surge voltages.
Description
The present invention relates to a kind of electric winding that for example is used for transformer or reactor winding, and the dry-type transformer or reactor or the inductor that utilize a kind of like this winding.
In all power transmission and distribution processes, use transformer, in order to Change Power between two or more electric power systems.The transformer of the capacity that can obtain from the VA level to the 1000MVA level.Voltage range has been increased to the highest transmission voltage of current use.
The transformer/reactor that the present invention is correlated with belongs to so-called power transformer/reactor, their specified output from hundreds of KVA to surpassing 1000MVA, rated voltage from 3-4KV to very high transmission voltage.
Usually the main task of power transformer is or more to have different voltages but to have between the electric power system of same frequency and exchange electric energy at two.
Conventional power transformer/reactor comprises a transformer core, and it is to constitute by being generally by the stacked silicon steel sheet of certain orientation.This iron core is made up of some iron core support arms that utilize yoke to couple together.Around the iron core support arm some windings are housed, are referred to as elementary winding, secondary winding and adjusting winding usually.In power transformer, these windings in fact always press that concentric structure is arranged and along the distribution of lengths of iron core support arm.
Be applicable to that the power transformer than the routine of lower part in the above-mentioned range of capacity is often made according to air cooling, so that take away inevitable thermal losses.This transformer can have a shell that has the ventilation perforate, so that its protection is avoided contact and can be reduced the transformer external magnetic field.
Yet, the power transformer of most conventional be oil cooling and utilize so-called forced oil cooling mode to cool off usually.To one of this its reason is oil also as dielectric, this is unusual important function.Therefore oil cooled and oil-insulated conventional electric power transformer is enclosed in the external fuel tank, and this fuel tank must satisfy very high requirement.
Also have the oil-insulated power transformer of some routines, wherein oil is with water-cooled.
These oil-filled conventional electric power transformers have several shortcomings.Wherein need an externally mounted fuel tank that wherein holds transformer, and transformer by the transformer core that coil is housed, be used to insulate and the oil that cools off and dissimilar mechanical supporting devices form.Fuel tank must satisfy very high mechanical requirement, and this is owing to needed to carry out vacuum treatment before transformer is oil-filled, almost reaches absolute vacuum.Need externally mounted fuel tank just to make the Computer-Assisted Design, Manufacture And Test operation expend time in very much.Fuel tank also has sizable external dimensions.And big external dimensions also can run into very big transportation problem usually.Transformer also is equipped with very complicated forced oil-circulation device usually.For divide in the external connecting of transformer and nearest line circle/winding between electrical connection, need have one to be fixed to while on the fuel tank and must to satisfy the sleeve pipe of insulating requirements, the inboard and the outside both of fuel tank had insulating requirements.
For so-called dry-type transformer, capacity and rated voltage there are the very strict upper limit, this is owing to Insulation Problems and is difficult to drain effectively thermal losses from winding.
By US 50361651 known a kind of conductors, insulation wherein forms the internal layer and the skin of semiconductive pyrolysis glass fibre.The also known conductor that in motor, uses that provides with a kind of like this insulation, for example in US 5066881, introduced, semiconductive pyrolysis glass layer wherein contacts with two parallel bars that form this conductor, and the insulation in stator slot by a semiconductive pyrolysis glass layer institute around.It is introduced that this pyrolysis glass fiber material suits, even this is because it still keeps its resistivity after impregnation process.
The purpose of this invention is to provide a kind of power cable of solid insulation that has with the cable analog structure that is used for distribution, it is used for electric winding, and this cable can improve the a.o performance of dry-type transformer.The present invention also aims to provide a kind of electric winding that constitutes by a kind of like this cable and dry-type transformer and inductor or the reactor that comprises a kind of like this winding is provided.
The cable that utilization limits in claim 1, the winding that in claim 21, limits, transformer that limits in claim 25 and the reactor that limits in claim 26 are realized this purpose.
According to cable of the present invention can bear very high voltage and since it outer semiconducting layer and with this one deck be connected to ground mode (if desired), can be with reference to its environment, both limit the current potential of winding cable for alternating voltage and/or for surge voltage, this is a great advantage, because the metal parts for example in power transformer is typically connected on the earth potential of appointment.Utilization can also realize the cable continuous ground according to cable of the present invention for alternating voltage and surge voltage, does not use special earthing device as the situation discrete some ground connection.The peak of total voltage is applied in the insulation of cable.Alternating voltage between outer semiconducting layer and ground only is the order of magnitude that 100 volts the order of magnitude and surge voltage can occur kilovolt.
A preferred embodiment according to cable of the present invention, be the band of the band made of insulating tape outside between second semi-conductive layer and thereon the earthing conductor of configuration along cable extension, wherein use conductor, be distributed on this insulating tape as this ground connection of a band that is divided into each separated portions.By according to the method the conductor of ground connection being divided into each separated portions, prevented the short circuit of induced voltage.
Another preferred embodiment according to cable of the present invention, the described device that is used for ground connection comprises second insulating barrier in the outside that is configured in second semi-conductive layer, and the outer conducting layer that is connected to ground, this outer conducting layer is around second insulating barrier, and this insulating barrier forms an obvious electric capacity greater than cable capacitance with second semi-conductive layer.In this manner, outer semiconducting layer is owing to the capacitance voltage dividing potential drop is forced to place a low-voltage.
Another preferred embodiment according to cable of the present invention, this insulation comprises an insulating tape of reeling around second semi-conductive layer and the conductor of this ground connection comprises a shell that is connected to the electric conducting material on ground, the space that described band utilization forms between every circle forms opening in the wire turn of each separation and/or in this band, make the space that is filled with air be formed between second conductive layer and the shell, this space that is filled with air forms discharging gap, so that will shift (if this voltage surpasses predetermined limit value) from the voltge surge of second conductive layer.Such an embodiment particularly has relatively little perforate, can form a kind of firm structure.Because, make the electric capacity that between the shell and second conductive layer, forms obviously greater than cable capacitance by determining the size of this band, just can guarantee second conductive layer for alternating voltage can be continuously current potential closely.
According to another preferred embodiment of cable of the present invention, this skin and this shell have some circular incisions at the preposition along cable.In addition, this shell is used in the pre-position along cable respectively according to the form that constitutes more separable rings around insulated conductive material.So just prevent from the winding that constitutes by cable, to form short-circuit loop.
According to a preferred embodiment of cable of the present invention, cable size is in 20～200 millimeters the interval and the conductor area is in 80～3, in 000 square millimeter the interval.
In power transformer/reactor according to the present invention, winding preferably is made of the cable with solid extrusion molding insulation that now is used for the distribution type, for example XLPE type cable or have the cable of EPR insulation.This cable is flexible, and this is an important characteristic in this article, and this is that wherein this winding is made of flexible cable in assembling process owing to be used for mainly just being based on this winding system according to the technology of device of the present invention.The cable that the flexible of cable is generally for 30 millimeters of diameters is about 20 centimetres radius of curvature, and for the about 65 centimetres radius of curvature of cable of 80 millimeters of diameters.Using term " flexible " in this application is that the expression winding is flexible in the radius of curvature down to 4 times of cable size magnitudes, preferably according to the radius of curvature bending of 8～12 times cable size.
According to cable of the present invention, even when crooked be or when the process of operation is subjected to thermal stress, also can keep its characteristic.Importantly each layer kept adhering to each other in this article.Here the properties of materials of each layer is conclusive, particularly their elasticity and relative thermal coefficient of expansion.In XLPE type cable, for example insulating barrier is made of the low-density polyethylene of interlinkage, and semi-conductive layer is made of the polyethylene that wherein is mixed with carbon black and metallic particles.Because the caused change in volume of temperature fluctuation is compensated by the variation of radius in cable fully, this is because with respect to due to the smaller difference of elasticity between the thermal coefficient of expansion of each layer of these materials, may produce radial expansion not losing between each layer under the situation of adhering to.
Above-mentioned combination of materials will be understood that it only is some examples.Satisfy defined condition and also satisfy semiconductive condition (resistivity that promptly has is in 10
-1-10
6For example 1-500 ohmcm or 10-200 ohmcm in the scope of ohmcm) other combinations also fall within the scope of the invention.
For example insulating barrier can be by for example low-density polyethylene of the thermoplastic of solid (LDPE), highdensity polyethylene (HDPE), polypropylene (PP), polybutene (PB), polymethylpentene (PMP); Interlinkage the material polyethylene of interlinkage (XLPE) for example; Perhaps rubber constitutes such as ethylene-propylene rubber (EPR) or silicon rubber.
But interior semi-conductive layer and outer semiconducting layer can be for identical base materials wherein are mixed with by electric conducting material for example carbon black or metal powder granulates.
The mechanical property of these materials particularly their thermal coefficient of expansion is subjected to relatively little influence, no matter in order to realize that according to conductance required for the present invention at least according to required ratio, wherein mixed carbon black still is a metal dust or unmixed.Therefore insulating barrier and each semi-conductive layer have essentially identical thermal coefficient of expansion.
Ethylene-vinyl acetate ester copolymer/nitrile rubber, butyl grafted polyethylene, ethene-butyl acrylate copolymer and ethene-ethyl acrylate copolymer also can constitute the polymer that is applicable to semi-conductive layer.
Even when in each layer, using dissimilar materials, wish that still their thermal coefficient of expansion is basic identical as substrate.According to above-named combination of materials a kind of example that comes to this.
Above-named material has good relatively elasticity, and its E modulus is E＜500 MPas, preferably E＜200 MPas.This elasticity is enough for the minute differences between the thermal coefficient of expansion of the layers of material that will compensate along flexible radial direction, make crackle or other defect and each layer can not appear and can be not separated from one another.Layers of material be flexible and each layer between adhesive force at least also have identical numerical value for the weakest part of various materials.
The conductance of two semi-conductive layers is enough for the current potential of balanced each layer basically.The conductance of outer conducting layer wants enough big so that be included in electric field in the cable, but in order not cause that owing in the caused obvious loss of electric current along the longitudinal induction of this layer, it should be enough little.
Therefore each semi-conductive layer in two semi-conductive layers constitutes an equipotential surface basically, and these layers will be enclosed in electric field therebetween basically.
Certainly can not there be any part to hinder one or more additional semi-conductive layers to be configured in the insulating barrier.
A kind of dry-type transformer also is provided according to the present invention, and it has at least one according to cable winding of the present invention.Therefore can access a kind of dry-type transformer, it can operate in cooling effectively under the obvious higher voltage, makes this transformer can bear high electric load.Thereby transformer can also install easily at the scene, and promptly iron core and winding can transport respectively, make transportation problem alleviate.
In order to explain the present invention, introduce the more detailed preferred embodiment of cable according to the present invention with reference to the accompanying drawings, wherein:
Fig. 1 represents the perspective view according to the end among first embodiment of cable of the present invention, and it is equipped with and is used for device that cable is grounded for surge voltage;
Fig. 2 represents corresponding equivalent circuit diagram;
Fig. 3 represents that it is equipped with the device that cable is grounded for alternating voltage according to the sectional drawing of cable second embodiment of the present invention;
Fig. 4 represents corresponding equivalent circuit diagram;
Fig. 5 represents that according to the end perspective view among the 3rd embodiment of cable of the present invention it is equipped with the device that is used for impact voltage and alternating voltage realization cable grounding;
Fig. 6 represents according to the winding among the embodiment of cable of the present invention, and
Fig. 7 represents according to the winding among another embodiment of cable of the present invention.
Fig. 1 represents the perspective view according to the end among the embodiment of cable of the present invention.This cable comprises one by some electric conducting materials conductor wire core 2 of constituting of copper cash thigh for example.Core 2 is configured in the center of cable and centers on core is interior first semi-conductive layer 4.Dispose for example by insulating barrier 6 around interior first semi-conductive layer 4 for the XLPE insulation.Around outer second semi-conductive layer 8 of insulating barrier 6 configurations.The outside of second semi-conductive layer 8 configuration outside is along the insulating tape 10 of cable.On insulating tape, have with by electric conducting material the electric conductor that constitutes of metal for example with 12 form.Electric conductor 12 is also by suitable mode ground connection.
Fig. 2 represents the equivalent circuit diagram according to this embodiment of cable of the present invention, and the voltage that wherein is added on the cable core 2 is marked by U, cable capacitance C
CFork-like farm tool used in ancient China mark, discharging gap 14 are located between outer second semi-conductive layer 8 and the conductor 12.
Therefore, if the numerical value of the surge voltage that produces on second semiconductor layer 8 surpasses the puncture voltage of discharging gap 14 outside, then through forming short circuit between second semiconductor layer 8 and the conductor 12 outside at the air-gap between the described device, and outer second semiconductor layer, 8 corresponding ground connection, promptly surge voltage is converted into earth potential.
In order to prevent the induced voltage short circuit, conductive strips 12 are divided into each separated portions, and each part can be distinguished ground connection.
Fig. 3 represents second embodiment according to cable of the present invention, and wherein second insulating barrier 16 of relative thin is configured in second semiconductor layer, 8 outsides.Dispose the outer conducting layer 18 that is connected to ground in second insulating barrier outside, this outer conducting layer 18 is around second insulating barrier 16, and this insulating barrier and second semi-conductive layer form ground capacity together.This skin 18 preferably is made of metal.
Fig. 4 represents for the equivalent circuit diagram at the embodiment of the cable shown in Fig. 3.By with Fig. 2 in identical mode, the voltage on the core 2 in the cable marks with U, cable capacitance C
CMark, and the ground capacity between second semi-conductive layer 8 and outer 18 marks with CG.Because ground capacity C
GObviously greater than cable capacitance C
C, because at voltage U on the core 2 of cable and the capacitance partial pressure between the earth potential on outer 18, the current potential of second semi-conductive layer 8 will keep closely current potential.
Separate certain distance as every circle, then outer 18 can realize for the every circle ground connection of winding.
Fig. 5 represents that according to the end among the embodiment of cable of the present invention wherein electrical insulation tape 20 is reeled on the outside of second semi-conductive layer 8 around cable.In gap 22, reel and in 20, be formed with some little openings 24 with 20.Dispose the external conductive casing 26 of ground connection on 20 the outside.Shell 26 preferably is made of metal forming.
Between second semi-conductive layer 8 and shell 26, form some and be filled with the space of air, be formed on between each wire turn of 20 and at the discharging gap at each opening 24 place, this gap is drawn away the surge voltage (if surge voltage surpasses predetermined limit value) that produces and is transformed into shell 26 and on the ground by second semi-conductive layer 8.
Said embodiment certainly improves, the space that is filled with air that make to form discharging gap only exists between each circle of this band (promptly not forming opening in this band), perhaps this band can closely be reeled, and makes only to be formed with discharging gap by each opening in this band.Embodiment with each relatively little opening forms firm especially structure.
In this skin, be formed with otch, so that prevent the cable short circuit of reeling in predetermined centre position.Fig. 6 represents the winding according to cable of the present invention, wherein the same position place that the wire turn 28 of each adjacent coiling contacts with each other and otch 30 is distributed in each cable wire turn 28 in cable jacket.Therefore in the shell that distributes along whole winding, realized that the skin of interruption and winding only need be end 32 ground connection of winding.
Fig. 7 represents to utilize the winding of an embodiment of cable, and wherein this shell is according to being made of the ring 36 around this insulated conductive material.These rings 36 at preposition, are wider than ring 36 in each ring gap 38 between 36 along cable distribution.
When making according to cable winding shown in Figure 7, cable is reeled like this, makes the ring 36 of wire turn of each adjacent coiling contact each other in this manner, promptly will make each ring form at least one the continuous electrical connections that distributes along winding.In embodiment according to Fig. 7, two two such electrical connections that distribute along winding are arranged, they are respectively 38 and 40 ground connection.In the end of winding, the ring of two ground connection is then represented with 42 and 44.
In process according to the winding of manufacturing shown in 7, if take place between two rings of wire turn that a ring is positioned in two adjacent coilings, make between each adjacent wire turn, not form and electrically contact, usually will can not cause producing infringement, this is owing to low relatively voltage between each adjacent wire turn is about the 50-100 volt.
Claims (26)
1. power cable, be designed for electric winding, it is characterized in that, conductor wire core (2) contacts with interior first semi-conductive layer (4) that centers on this core, first insulating barrier (6) around first semi-conductive layer is configured in this first semi-conductive layer outside, outer second semi-conductive layer (8) around first insulating barrier is configured in first insulating barrier outside, and device (10,12; 16,18) be configured in second semi-conductive layer outside, so that realize cable grounding along the major part of cable length continuously for alternating voltage and/or surge voltage at least.
2. cable according to claim 1, it is characterized in that, the described device that is used for ground connection comprises one and is configured in the conductor that second semi-conductive layer outside is connected to ground, accompany insulating barrier betwixt, use this insulating barrier according to a kind of like this mode, when promptly the surge voltage on second semi-conductive layer surpasses predetermined threshold value,, make second semi-conductive layer be connected to ground owing between the conductor of second semi-conductive layer and ground connection, puncture.
3. cable according to claim 2 is characterized in that, this insulating barrier is to be to use as the band that is split up into each separated portions according to the earthing conductor that constitutes the form of band along the insulating tape of cable extension and be configured on this insulating tape.
4. cable according to claim 1, it is characterized in that, the described device that is used for ground connection comprises second insulating barrier, be configured in the outside of second semi-conductive layer, and one be connected to ground around the outer conducting layer of second insulating barrier, and second insulating barrier constitutes obvious electric capacity greater than cable capacitance with second semi-conductive layer.
5. cable according to claim 1 and 2, it is characterized in that, this insulating barrier comprises the insulating tape (20) of reeling round second semi-conductive layer, and earthing conductor comprises the shell (26) of the electric conducting material formation that is connected to ground, wire turn neutralization/or form aperture (24) in this band is separated in the space (22) that described band utilization is formed between each wire turn around each, make to form the gap that is filled with air between second semi-conductive layer (8) and shell (26), these air form discharging gap so that will when it surpasses predetermined limit value this voltage be shifted from the surge voltage on second semi-conductive layer.
6. cable according to claim 5 is characterized in that, determines the size of band (20) so that make the electric capacity that forms between shell (26) and second semi-conductive layer (8) obviously greater than cable capacitance.
7. according to described cable one of among the claim 4-6, it is characterized in that this skin or this shell are made of metal.
8. according to described cable one of among the claim 4-7, it is characterized in that this skin or this shell body have along the circular incision in the precalculated position of cable.
9. according to described cable one of among the claim 5-8, it is characterized in that this shell is taked the form around each ring (36) that separates of insulating barrier that is made of electric conducting material, form in each predetermined position along cable and separate.
10. cable according to claim 9 is characterized in that, at the width that surpasses ring along the gap between each ring (36) of the length direction of cable.
11., it is characterized in that this conductor wire core comprises some line thighs of being made by electric conducting material according to described cable one of among the claim 1-10.
12., it is characterized in that cable size is in the scope of 20-200 millimeter and the conductor area is in 80-3, in 000 square millimeter the scope according to described cable one of among the claim 1-11.
13., it is characterized in that this cable is flexible according to the described cable of aforementioned arbitrary claim.
14., it is characterized in that described each layer contacts with each other basically according to the described cable of aforementioned arbitrary claim in the whole surface range of rotating towards each other.
15., it is characterized in that described each layer is attached to each other according to the described cable of aforementioned arbitrary claim.
16. according to the described cable of aforementioned arbitrary claim, it is characterized in that described layers of material has high elasticity, modulus of elasticity is advisable less than 500 MPas, and is better less than 200 MPas.
17., it is characterized in that the material coefficient of thermal expansion coefficient of described each layer has identical numerical value basically according to the described cable of aforementioned arbitrary claim.
18. cable according to claim 15 is characterized in that, the adhesion of described each layer has the identical magnitude of intensity with the weakest material at least.
19. according to the described cable of aforementioned arbitrary claim, it is characterized in that, described each layer is to be made of the material with such elasticity and such thermal coefficient of expansion, promptly in running since the change in volume of caused each layer of variation of temperature compensated by the elasticity of material, when making the variations in temperature that takes place in running, each layer kept reclining each other.
20., it is characterized in that each semi-conductive layer constitutes an equipotential surface according to the described cable of aforementioned arbitrary claim.
21. an electric winding is characterized in that, it is by according to described cable winding one of in the aforesaid claim.
22. winding according to claim 21 has the described cable of claim 8, it is characterized in that, an otch (30) of each winding wire turn (28) is distributed in the shell of cable.
23. winding according to claim 22, it is characterized in that, each adjacent winding wire turn (28) contacts with each other, the otch that has (30) is to being distributed in identical position at each winding wire turn, and only in this earthing of casing of winding overhang, be distributed in a side of otch (30) in the ground connection coupling part at an end place of winding, be distributed in the opposite side of otch (30) in the ground connection coupling part at the other end place of winding.
24. winding according to claim 21, has cable according to claim 9, it is characterized in that, designing this winding makes the ring (36) of each adjacent winding wire turn formation contact with each other according to a kind of like this mode, be that each ring constitutes at least one the continuous electrical connections that crosses winding, this ring is end place (38, a 40) ground connection of winding.
25. a dry-type transformer is characterized in that, it comprises at least one according to described winding one of among the claim 21-24.
26. a reactor is characterized in that, it comprises as described winding one of in claim 21～24.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9700344A SE508523C2 (en) | 1997-02-03 | 1997-02-03 | Electric cable for e.g. transformer or reactor winding |
| SE9700344-6 | 1997-02-03 | ||
| SE9704418-4 | 1997-11-28 | ||
| SE9704418A SE9704418D0 (en) | 1997-02-03 | 1997-11-28 | Electrical component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1244287A true CN1244287A (en) | 2000-02-09 |
Family
ID=26662870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98801965 Pending CN1244287A (en) | 1997-02-03 | 1998-02-02 | Cable for an electrical winding and such a winding |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0956569A1 (en) |
| JP (1) | JP2001509963A (en) |
| CN (1) | CN1244287A (en) |
| AU (1) | AU5891098A (en) |
| CA (1) | CA2276348A1 (en) |
| NO (1) | NO993715L (en) |
| SE (1) | SE9704418D0 (en) |
| WO (1) | WO1998034247A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107978421A (en) * | 2016-10-25 | 2018-05-01 | 三星电机株式会社 | Inductor |
| CN110402472A (en) * | 2017-03-24 | 2019-11-01 | Abb瑞士股份有限公司 | High-voltage winding and high-voltage electromagnetic sensing apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6188298B1 (en) * | 1998-12-30 | 2001-02-13 | Square D Company | Winding transient suppression technique |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4109098A (en) * | 1974-01-31 | 1978-08-22 | Telefonaktiebolaget L M Ericsson | High voltage cable |
| US5036165A (en) * | 1984-08-23 | 1991-07-30 | General Electric Co. | Semi-conducting layer for insulated electrical conductors |
-
1997
- 1997-11-28 SE SE9704418A patent/SE9704418D0/en unknown
-
1998
- 1998-02-02 JP JP53280198A patent/JP2001509963A/en active Pending
- 1998-02-02 CN CN 98801965 patent/CN1244287A/en active Pending
- 1998-02-02 AU AU58910/98A patent/AU5891098A/en not_active Abandoned
- 1998-02-02 WO PCT/SE1998/000159 patent/WO1998034247A1/en not_active Application Discontinuation
- 1998-02-02 CA CA002276348A patent/CA2276348A1/en not_active Abandoned
- 1998-02-02 EP EP98902356A patent/EP0956569A1/en not_active Withdrawn
-
1999
- 1999-07-30 NO NO993715A patent/NO993715L/en not_active Application Discontinuation
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107978421A (en) * | 2016-10-25 | 2018-05-01 | 三星电机株式会社 | Inductor |
| CN107978421B (en) * | 2016-10-25 | 2021-04-27 | 三星电机株式会社 | Inductor |
| CN110402472A (en) * | 2017-03-24 | 2019-11-01 | Abb瑞士股份有限公司 | High-voltage winding and high-voltage electromagnetic sensing apparatus |
| US10872721B2 (en) | 2017-03-24 | 2020-12-22 | Abb Power Grids Switzerland Ag | High voltage winding and a high voltage electromagnetic induction device |
| CN110402472B (en) * | 2017-03-24 | 2020-12-29 | Abb瑞士股份有限公司 | High-voltage winding and high-voltage electromagnetic induction equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| NO993715D0 (en) | 1999-07-30 |
| EP0956569A1 (en) | 1999-11-17 |
| JP2001509963A (en) | 2001-07-24 |
| SE9704418D0 (en) | 1997-11-28 |
| CA2276348A1 (en) | 1998-08-06 |
| AU5891098A (en) | 1998-08-25 |
| NO993715L (en) | 1999-07-30 |
| WO1998034247A1 (en) | 1998-08-06 |
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