WO2005015762A2 - A glass fiber net tape continuously transposed cables, method for manufacturing and using the same - Google Patents

A glass fiber net tape continuously transposed cables, method for manufacturing and using the same Download PDF

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Publication number
WO2005015762A2
WO2005015762A2 PCT/EP2004/009623 EP2004009623W WO2005015762A2 WO 2005015762 A2 WO2005015762 A2 WO 2005015762A2 EP 2004009623 W EP2004009623 W EP 2004009623W WO 2005015762 A2 WO2005015762 A2 WO 2005015762A2
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WO
WIPO (PCT)
Prior art keywords
ctc
glass fiber
fiber net
net tape
enameled wires
Prior art date
Application number
PCT/EP2004/009623
Other languages
French (fr)
Other versions
WO2005015762A3 (en
Inventor
Henry Zhao
Bertrand Filet
Original Assignee
Nexans Societe Anonyme
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 Nexans Societe Anonyme filed Critical Nexans Societe Anonyme
Publication of WO2005015762A2 publication Critical patent/WO2005015762A2/en
Publication of WO2005015762A3 publication Critical patent/WO2005015762A3/en

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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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/323—Insulation between winding turns, between winding layers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
    • 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
    • H01F27/2823—Wires
    • H01F2027/2838—Wires using transposed wires
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H02K3/14—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors

Definitions

  • This invention relates to a continuously transposed cable (CTC), method for manufacturing and using the CTC, which is primarily but not limited to be used in large-scale transformers or the other electrical apparatus such as motor, and more particularly, to a glass fiber net tape continuously transposed cable, the method for manufacturing and using it.
  • CTC continuously transposed cable
  • a conventional CTC is wrapped by an insulation paper in the outmost layer, which influences heat exchange and increases size of windings of the transfonner.
  • the European Patent EP 0746 861 Bl discloses a structure of wrapping CTC by using a woven strip dipping with epoxy resin. The warp and weft of the woven strips are formed with polyester or mixed glass silk/polyester. In such a way, heat exchange problem is partially solved.
  • polyester as an ingredient of the woven strip, will hydrolyzed, i.e. when used in transformer oil, especially at working temperature of 80-100 C, the polyester material will dissolve gradually and even disappear thoroughly. Therefore, this polyester fabric mesh strip, used as binding strip, has problems in terms of long-term use.
  • An object of the present invention is to provide a CTC mainly used in large-scale transformers and wrapped by glass fiber net tape, so that its construction and performance can be maintained all the time when it is used so as to avoid hydrolyzation.
  • Another object of the present invention is to provide a method for manufacturing and using the CTC used in large-scale transformers and having the above mentioned characteristics.
  • the present invention provides a CTC for transformer, wherein an outer surface of the CTC is wrapped by a glass fiber net tape.
  • this CTC includes a first row of enameled wires and a second row of enameled wires, each row of which includes multiple enameled wires.
  • the first row of enameled wires pass through the second row of enameled wires via a bend.
  • the second row of enameled wires pass through the first row of enameled wires via another bend.
  • the glass fiber net tape is processed by immersing into a self-adhesive epoxy resin to enable the glass fiber net tape to be bonded to the CTC.
  • the glass fiber net tape is wrapped by an insulation paper. More preferably, continuous threads are added between the glass fiber net tape and the insulation paper.
  • the first and second rows of enameled wires are enlaced by the glass fiber net tape at a certain angle.
  • the glass fiber net tape includes multiple warp glass fiber threads and multiple weft glass fiber threads.
  • the warp glass fiber threads wind around weft glass fiber threads and they are braided and twisted by each other.
  • the above mentioned CTC winds around a shaft.
  • the present invention further provides a method for manufacturing a glass fiber net tape CTC, comprising the steps of: preparing enameled wires; transposing said enameled wires together to form CTC; and winding obliquely glass fiber net tape on the periphery of the CTC.
  • the aforesaid method further comprises the following step: wrapping insulation paper and threads on the outer layer of the glass fiber net tape CTC.
  • the aforesaid method further comprises the following step: winding contractedly the glass fiber net tape CTC on the shaft.
  • the present invention further provides a method for using the glass fiber net tape CTC, comprising the steps of: releasing gradually the glass fiber net tape CTC wound around the shaft; bending the cable and removing the insulation paper and threads on the outer layer of the glass fiber net tape CTC; helically winding to form windings; heating to integrate the glass fiber net tape with the CTC.
  • Fig. 1 is a perspective view schematically showing the structure of the CTC in the present invention
  • Figs. 2A and 2B show a preferable structure of the glass fiber net tape for the CTC.
  • Fig. 3 is an analysis view schematically showing the force when the glass fiber net tape is wound, wherein Fig. 3A is an analysis view schematically showing the force when it is wound straightly and Fig. 3B is an analysis view schematically showing the force when it is wound obliquely.
  • a CTC for transformer which comprises a first row of enameled wires 1 and a second row of enameled wires 2, each row of which includes multiple enameled wires 3.
  • the first row of enameled wires 1 pass through the second row of enameled wires via a bend 4.
  • the second row of enameled wires 2 pass through the first row of enameled wires 1 via another bend 4.
  • An outer surface of the CTC consisting of the first row of enameled wires 1 and the second row of enameled wires 2 is wrapped by a glass fiber net tape 5.
  • the glass fiber net tape 5 can be immersed into epoxy resin, so that the glass fiber net tape is capable to be bonded to the CTC.
  • the glass fiber net tape is wrapped by an insulation paper. Preferably, continuous threads are added between the glass fiber net tape and the insulation paper.
  • the periphery of the CTC is wrapped obliquely by the prepared glass fiber net tape 5 at a certain angle to cover the surface of the CTC, of which structure is shown in Fig. 1.
  • the present invention uses, but is not limited to, the glass fiber net tape having the following properties as wrapping material:
  • Glass Fiber No-alkali electronic degree-glass type Mesh Size: 3mmx3mm Base weight of the glass fiber not processed: >60g/m Tensile Strength: Waip: >800N/30mm width Weft: >1000N/30mm width Width of the net tape: 30mm (adjustable depending on the applying conditions)
  • warp glass fibers 51a-51d include three or four fibers, in which warp glass fibers 51a and 51b are twisted around weft glass fibers 52a-52d, warp glass fiber 51c, or warp glass fiber 51c and 5 Id, as intensifying fiber, reinforces a structure constituted by warp glass fibers 51a, 51b and weft glass fibers 52a, 52b, and warp glass fibers 51a, 51b and weft glass fibers 52c, 52d.
  • the whole glass fiber net tape gathers to be a tight integrity so as to ensure mechanical intensity and stability of the structure.
  • the wrapping stability of the glass fiber net tape is improved in the present invention, so as to ensure that the whole glass fiber net tape remains undistorted when the glass fiber net tape CTC is wound to form a winding, so as to improve mechanical intensity of the glass fiber net tape CTC.
  • the glass fiber net tape having the aforesaid structure, is wrapped full-automatically and obliquely. As shown in Fig. 1 , the surface of the whole CTC can be covered full-automatically and continuously in such a wrapping way, so as to ensure a consistency of the glass fiber net tape CTC and reduce distortion of the glass fiber net tape owing to bending of the CTC, when the winding is formed.
  • FIG. 3 it is an analysis view schematically showing the force when the glass fiber net tape is wound
  • Fig. 3A is an analysis view schematically showing the force when it is wound straightly
  • Fig. 3 B is an analysis view schematically showing the force when it is wound obliquely.
  • the net tape when it is wound straightly, is forced only in warp direction and supposed to be Al, there is no force in weft direction. If it is wound obliquely the warp force is A4 and weft force is A3, which bear Al together. Therefore, we can conclude that oblique winding enables uniform force and is superior to straight winding.
  • the new type of CTC is mainly used in large-scale transformers having a power of greater than 220kVA so as to enhance heat exchange between the CTC and transformer oil, reduce the size of winding, and improve use efficiency of CTC material.
  • contact of the CTC enameled conductor with transformer oil can be in the greatest extent so as to maximize heat exchange.
  • a conventional CTC is wrapped by an insulation paper, which influences heat exchange and increases size of windings of the transformer.
  • the structural improvement of the present invention enables reduction of sizes of the winding and the whole transformer and cost economy.
  • the glass fiber net tape used in the present invention compared with the currently used polyester mesh tape, satisfies the existing characteristic and further overcomes innate defects of the polyester material.
  • the glass fiber net tape is chemically stable and unreactive, mechanically stable and remains unchanged for a long time, fracture resistant, and has a good binding performance.
  • the glass fiber net tape in the present invention is wound obliquely, so that winding speed is increased and extensively automatic production is improved. Also, oblique winding, compared with straight winding, has a good damage resistance due to incontinuity. Thus, a transformer winding as small as possible is formed according to the customers' requirement.
  • the glass fiber net tape can be dipped with self-adhesive epoxy resin, which on the one hand improves mechanical performance and on the other hand further enhances mechanical intensity of the transformer winding, because the net tape is bonded to the CTC conductor after the transformer winding is heated.
  • another insulation paper can be additionally wrapped. Continuous threads are added between the glass fiber net tape and the insulation paper. When forming a transformer winding, the continuous thread is dragged to cut off the insulation paper in the outermost layer so as to make it take off automatically.
  • the insulation paper not only has a protection function but also has no influence to the use of the glass fiber net tape CTC.
  • the glass fiber net tape CTC is manufactured as follows:
  • the method for using the glass fiber net tape CTC are as follows: releasing gradually the glass fiber net tape CTC wound around a shaft; bending the cable and removing the insulation paper and threads on the outer layer of the glass fiber net tape CTC; helically winding to form windings; heating to integrate the glass fiber net tape with the CTC.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulated Conductors (AREA)

Abstract

A continuously transposed cable (CTC) for a transformer is disclosed. The outer surface of the CTC is wrapped by glass fiber net tape (5). The CTC comprises a first row of enameled wires (1) and a second row of enameled wires (2), each row of which includes multiple enameled wires (3). The first row of enameled wires pass through the second row of enameled wires via a bend (4) and the second row of enameled wires pass through the first row of enameled wires via another bend (4), so that transposition between the first row of enameled wires and the second row of enameled wires can be carried out. In the present invention, the glass net tape is used to wrap the CTC, so as to maintain its structure and performance all the time when it is used to thereby avoid hydrolyzation.

Description

A GLASS FIBER NET TAPE CONTINUOUSLY TRANSPOSED CABLES, METHOD FOR MANUFACTURING AND USING THE SAME
FIELD OF THE INVENTION
This invention relates to a continuously transposed cable (CTC), method for manufacturing and using the CTC, which is primarily but not limited to be used in large-scale transformers or the other electrical apparatus such as motor, and more particularly, to a glass fiber net tape continuously transposed cable, the method for manufacturing and using it.
DESCRIPTION OF THE RELATED ART
A conventional CTC is wrapped by an insulation paper in the outmost layer, which influences heat exchange and increases size of windings of the transfonner. The European Patent EP 0746 861 Bl discloses a structure of wrapping CTC by using a woven strip dipping with epoxy resin. The warp and weft of the woven strips are formed with polyester or mixed glass silk/polyester. In such a way, heat exchange problem is partially solved. However, when the CTC is wrapped by using the woven strip dipping with epoxy resin, there are the following problems: polyester, as an ingredient of the woven strip, will hydrolyzed, i.e. when used in transformer oil, especially at working temperature of 80-100 C, the polyester material will dissolve gradually and even disappear thoroughly. Therefore, this polyester fabric mesh strip, used as binding strip, has problems in terms of long-term use.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a CTC mainly used in large-scale transformers and wrapped by glass fiber net tape, so that its construction and performance can be maintained all the time when it is used so as to avoid hydrolyzation.
Another object of the present invention is to provide a method for manufacturing and using the CTC used in large-scale transformers and having the above mentioned characteristics. In order to achieve the above objects, the present invention provides a CTC for transformer, wherein an outer surface of the CTC is wrapped by a glass fiber net tape.
Preferably, this CTC includes a first row of enameled wires and a second row of enameled wires, each row of which includes multiple enameled wires. The first row of enameled wires pass through the second row of enameled wires via a bend. The second row of enameled wires pass through the first row of enameled wires via another bend. These two rows of wires remain parallel all the time, so that transposition between the first row of enameled wires and the second row of enameled wires can be carried out.
Preferably, the glass fiber net tape is processed by immersing into a self-adhesive epoxy resin to enable the glass fiber net tape to be bonded to the CTC. Preferably, the glass fiber net tape is wrapped by an insulation paper. More preferably, continuous threads are added between the glass fiber net tape and the insulation paper.
Preferably, the first and second rows of enameled wires are enlaced by the glass fiber net tape at a certain angle.
Preferably, the glass fiber net tape includes multiple warp glass fiber threads and multiple weft glass fiber threads. The warp glass fiber threads wind around weft glass fiber threads and they are braided and twisted by each other.
Preferably, the above mentioned CTC winds around a shaft.
The present invention further provides a method for manufacturing a glass fiber net tape CTC, comprising the steps of: preparing enameled wires; transposing said enameled wires together to form CTC; and winding obliquely glass fiber net tape on the periphery of the CTC.
Preferably, the aforesaid method further comprises the following step: wrapping insulation paper and threads on the outer layer of the glass fiber net tape CTC.
Preferably, the aforesaid method further comprises the following step: winding contractedly the glass fiber net tape CTC on the shaft.
The present invention further provides a method for using the glass fiber net tape CTC, comprising the steps of: releasing gradually the glass fiber net tape CTC wound around the shaft; bending the cable and removing the insulation paper and threads on the outer layer of the glass fiber net tape CTC; helically winding to form windings; heating to integrate the glass fiber net tape with the CTC.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view schematically showing the structure of the CTC in the present invention;
Figs. 2A and 2B show a preferable structure of the glass fiber net tape for the CTC; and
Fig. 3 is an analysis view schematically showing the force when the glass fiber net tape is wound, wherein Fig. 3A is an analysis view schematically showing the force when it is wound straightly and Fig. 3B is an analysis view schematically showing the force when it is wound obliquely.
DESCRIPTION OF THE PREFERRED EMBODEMENTS
The invention will be described in combination of some preferable embodiments. It should be understood that these preferable embodiments are not limitation to the invention.
With reference to Fig. 1, it is a perspective view schematically showing the structure of the CTC in the present invention. In one preferable embodiment of the present invention, a CTC for transformer is provided, which comprises a first row of enameled wires 1 and a second row of enameled wires 2, each row of which includes multiple enameled wires 3. The first row of enameled wires 1 pass through the second row of enameled wires via a bend 4. The second row of enameled wires 2 pass through the first row of enameled wires 1 via another bend 4. Thus, transposition between the first row of enameled wires 1 and the second row of enameled wires 2 can be carried out. An outer surface of the CTC consisting of the first row of enameled wires 1 and the second row of enameled wires 2 is wrapped by a glass fiber net tape 5.
The glass fiber net tape 5 can be immersed into epoxy resin, so that the glass fiber net tape is capable to be bonded to the CTC.
The glass fiber net tape is wrapped by an insulation paper. Preferably, continuous threads are added between the glass fiber net tape and the insulation paper. The periphery of the CTC is wrapped obliquely by the prepared glass fiber net tape 5 at a certain angle to cover the surface of the CTC, of which structure is shown in Fig. 1.
With reference to Figs. 2 A and 2B, a preferable structure of the glass fiber net tape 5 is shown.
In consideration of various using requirements of the glass fiber net tape CTC and performances of raw material of glass fiber etc., the present invention uses, but is not limited to, the glass fiber net tape having the following properties as wrapping material:
Glass Fiber: No-alkali electronic degree-glass type Mesh Size: 3mmx3mm Base weight of the glass fiber not processed: >60g/m Tensile Strength: Waip: >800N/30mm width Weft: >1000N/30mm width Width of the net tape: 30mm (adjustable depending on the applying conditions)
As shown in Figs. 2 A and 2B, warp glass fibers 51a-51d, for example, include three or four fibers, in which warp glass fibers 51a and 51b are twisted around weft glass fibers 52a-52d, warp glass fiber 51c, or warp glass fiber 51c and 5 Id, as intensifying fiber, reinforces a structure constituted by warp glass fibers 51a, 51b and weft glass fibers 52a, 52b, and warp glass fibers 51a, 51b and weft glass fibers 52c, 52d. Thus, the whole glass fiber net tape gathers to be a tight integrity so as to ensure mechanical intensity and stability of the structure. According to the glass fiber net tape having the aforesaid preferable structure, the wrapping stability of the glass fiber net tape is improved in the present invention, so as to ensure that the whole glass fiber net tape remains undistorted when the glass fiber net tape CTC is wound to form a winding, so as to improve mechanical intensity of the glass fiber net tape CTC.
The glass fiber net tape, having the aforesaid structure, is wrapped full-automatically and obliquely. As shown in Fig. 1 , the surface of the whole CTC can be covered full-automatically and continuously in such a wrapping way, so as to ensure a consistency of the glass fiber net tape CTC and reduce distortion of the glass fiber net tape owing to bending of the CTC, when the winding is formed.
With reference to Fig. 3, it is an analysis view schematically showing the force when the glass fiber net tape is wound, wherein Fig. 3A is an analysis view schematically showing the force when it is wound straightly and Fig. 3 B is an analysis view schematically showing the force when it is wound obliquely. Seen from the simple force analysis, the net tape, when it is wound straightly, is forced only in warp direction and supposed to be Al, there is no force in weft direction. If it is wound obliquely the warp force is A4 and weft force is A3, which bear Al together. Therefore, we can conclude that oblique winding enables uniform force and is superior to straight winding.
The new type of CTC is mainly used in large-scale transformers having a power of greater than 220kVA so as to enhance heat exchange between the CTC and transformer oil, reduce the size of winding, and improve use efficiency of CTC material.
According to the wrapping glass fiber net tape of the present invention, contact of the CTC enameled conductor with transformer oil can be in the greatest extent so as to maximize heat exchange.
A conventional CTC is wrapped by an insulation paper, which influences heat exchange and increases size of windings of the transformer. The structural improvement of the present invention enables reduction of sizes of the winding and the whole transformer and cost economy.
The glass fiber net tape used in the present invention, compared with the currently used polyester mesh tape, satisfies the existing characteristic and further overcomes innate defects of the polyester material. The glass fiber net tape is chemically stable and unreactive, mechanically stable and remains unchanged for a long time, fracture resistant, and has a good binding performance.
The glass fiber net tape in the present invention is wound obliquely, so that winding speed is increased and extensively automatic production is improved. Also, oblique winding, compared with straight winding, has a good damage resistance due to incontinuity. Thus, a transformer winding as small as possible is formed according to the customers' requirement.
The glass fiber net tape can be dipped with self-adhesive epoxy resin, which on the one hand improves mechanical performance and on the other hand further enhances mechanical intensity of the transformer winding, because the net tape is bonded to the CTC conductor after the transformer winding is heated.
In order to prevent foreign matter from damaging the glass fiber net tape CTC, another insulation paper can be additionally wrapped. Continuous threads are added between the glass fiber net tape and the insulation paper. When forming a transformer winding, the continuous thread is dragged to cut off the insulation paper in the outermost layer so as to make it take off automatically. The insulation paper not only has a protection function but also has no influence to the use of the glass fiber net tape CTC.
The glass fiber net tape CTC is manufactured as follows:
Preparing enameled wires; transposing said enameled wires together to form CTC; and winding obliquely the glass fiber net tape on the periphery of the CTC; wrapping insulation paper and threads on the outer layer of the glass fiber net tape CTC; winding tightly the glass fiber net tape CTC on a shaft.
The method for using the glass fiber net tape CTC are as follows: releasing gradually the glass fiber net tape CTC wound around a shaft; bending the cable and removing the insulation paper and threads on the outer layer of the glass fiber net tape CTC; helically winding to form windings; heating to integrate the glass fiber net tape with the CTC.
The present invention is described according to some preferable embodiments above. However, the present invention is not limited to the embodiments. Those skilled in the art can make various alterations and changes according to the spirit of the invention. The present invention includes various equivalent embodiments.

Claims

Claims 1. A CTC for a transformer, wherein the outer surface of the CTC is wrapped with a glass fiber net tape.
2. The CTC for the transformer according to claim 1, wherein the CTC comprises a first row of enameled wires and a second row of enameled wires, each row of which includes multiple enameled wires; the first row of enameled wires pass through the second row of enameled wires via a bend and the second row of enameled wires pass through the first row of enameled wires via another bend, so that transposition between the first row of enameled wires and the second row of enameled wires can be realized.
3. The CTC for the transformer according to claim 1 or 2, wherein the glass fiber net tape is dipped with an epoxy resin, so that the glass fiber net tape is bonded to the CTC.
4. The CTC for the transformer according to claim 1 or 2, wherein the glass fiber net tape is wrapped by an insulation paper.
5. The CTC for the transformer according to claim 4, wherein continuous threads are added between the glass fiber net tape and the insulation paper.
6. The CTC for the transformer according to claim 1 or 2, wherein the first and second rows of enameled wires are enlaced by the glass fiber net tape at a certain angle.
7. The CTC for the transformer according to claim 1 or 2, wherein the glass fiber net tape includes multiple warp glass fiber threads and multiple weft glass fiber threads; the waip glass fiber threads wind around weft glass fiber threads and they are braided and twisted by each other.
8. The CTC for the transformer according to claim 1 or 2, wherein the CTC winds around a shaft.
9. A method for manufacturing a glass fiber net tape CTC, comprising the steps of: preparing enameled wires; transposing said enameled wires together to form CTC; and winding obliquely glass fiber net tape on the periphery of the CTC.
10. The method according to claim 9, further comprising the step of: wrapping insulation paper and threads on an outer layer of the glass fiber net tape CTC.
11. The method according to claim 9 or 10, further comprising the step of: winding the glass fiber net tape CTC on a shaft.
12. A method for using a glass fiber net tape CTC, comprising the steps of: releasing gradually the glass fiber net tape CTC wound around a shaft; bending the cable and removing the insulation paper and threads on an outer layer of the glass fiber net tape CTC; helically winding to form windings; heating to integrate the glass fiber net tape with the CTC.
PCT/EP2004/009623 2003-08-11 2004-08-11 A glass fiber net tape continuously transposed cables, method for manufacturing and using the same WO2005015762A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN 03153347 CN1581380A (en) 2003-08-11 2003-08-11 Glass fiber silk screen tape commutating conducting wire, and its manufacture and use method
CN03153347.7 2003-08-11

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WO2005015762A2 true WO2005015762A2 (en) 2005-02-17
WO2005015762A3 WO2005015762A3 (en) 2005-06-23

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Publication number Priority date Publication date Assignee Title
WO2019121280A1 (en) * 2017-12-20 2019-06-27 Siemens Aktiengesellschaft Insulation of sub-conductors of a dynamoelectric machine

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