CN204577227U - Transformer high-voltage coil stagewise end insulation reinforced structure - Google Patents
Transformer high-voltage coil stagewise end insulation reinforced structure Download PDFInfo
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- CN204577227U CN204577227U CN201520287816.7U CN201520287816U CN204577227U CN 204577227 U CN204577227 U CN 204577227U CN 201520287816 U CN201520287816 U CN 201520287816U CN 204577227 U CN204577227 U CN 204577227U
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Abstract
The utility model discloses a kind of transformer high-voltage coil stagewise end insulation reinforced structure, it comprises enamelled wire, end insulation and layer insulation.Described enamelled wire is wound around by the number of turn of design, and the enamelled wire being positioned at internal layer is high-tension coil initiating terminal, and being positioned at outer field enamelled wire is high-tension coil end, is separated by between adjacent layer enamelled wire by layer insulation.The insulation of described end is the external insulating barrier being located at every layer of enamelled wire most limit number of turn.Be corner cuboid jaggy with the high-tension coil cross section of enamelled wire layering coiling, the breach stayed insulate for widened end, and the end insulation that layering is widened forms stagewise end insulation reinforced structure.The utility model is by the number of turn of differential minimizing high-tension coil initiating terminal and end, space under rising on the one hand is for increasing end insulation width, to improve the class of insulation, the peak value of voltge surge is reduced on the other hand by field intensity between reduction layer, reduce equilibrant force, greatly reduce transformer damage probability thus.
Description
Technical field
The utility model relates to the insulation system between the built-in electric conductor of a kind of power equipment, and specifically, the utility model relates to a kind of insulating structure design scheme for power transformer high-tension coil.
Background technology
Power transformer run duration, is likely occasionally struck by lightning or human factor causes sudden short circuit accident.In power transformer high-tension coil, the surge voltage of high level is produced instantaneously when being struck by lightning or short circuit occurs, though this kind of local overvoltage attack time is very short, but peak value is very large, even than rated voltage high several times, direct formation is to the threat of power transformer high-tension coil, and the threat particularly brought initiating terminal and the end insulation structure of power transformer high-tension coil is maximum.Now, the commodity power transformer high-tension coil that market is supplied and low-voltage coil all adopt uiform section to be wound around, and join traditional end insulation outward, i.e. every layer of external measure-alike end insulation of enamelled wire.This kind of impartial end insulation system is seemingly reasonable, does not in fact give top priority to what is the most important, does not accomplish insulation of classifying as required, once there is above-mentioned accident, the most flimsy is exactly initiating terminal and the end of high-tension coil.
Utility model content
The utility model mainly for the deficiencies in the prior art, propose a kind of rational in infrastructure, make easy, safe and reliable transformer high-voltage coil stagewise end insulation reinforced structure.This structure is wound around the number of turn mainly through the enamelled wire rationally reducing high-tension coil initiating terminal and end, reduces interlayer field intensity on the one hand, insulate for set terminal in the space of saving on the other hand, to improve the ability that anti overvoltage impacts.
The utility model is achieved through the following technical solutions technical goal.
Transformer high-voltage coil stagewise end insulation reinforced structure, it comprises the insulation of enamel-cover line end and layer insulation.Described enamelled wire is wound in the high-tension coil of rectangle frame by the number of turn hierarchical sequence of design, and the enamelled wire being positioned at internal layer is high-tension coil initiating terminal, and being positioned at outer field enamelled wire is high-tension coil end, is separated by between levels enamelled wire by layer insulation.The insulation of described end is the external insulating barrier being located at the most circle place, limit of every layer of enamelled wire, and end insulation thickness equals the superposition one-tenth-value thickness 1/10 of every layer of enamelled wire.Its improvements are: be corner cuboid jaggy with the high-tension coil cross section of enamelled wire layering coiling, namely initiating terminal and the ecto-entad layering of end both sides inside contract, the breach stayed insulate for widened end, and the end insulation that layering is widened forms stagewise end insulation reinforced structure.
As further improvement project, the initiating terminal of high-tension coil and end form with 1 ~ 3 road enamelled wire in the lump order coiling respectively.
As further improvement project, the initiating terminal ground floor coiling turn ratio intermediate layer few 15 ~ 25% of high-tension coil, initiating terminal is divided into 2 ~ 4 layers of coiling, increases progressively by configuration number of plies decile.End last one deck coiling turn ratio intermediate layer few 10 ~ 20% of high-tension coil, end is divided into 2 ~ 4 layers of coiling, successively decreases by configuration number of plies decile.
The utility model compared with prior art, has following good effect:
1, stagewise end insulation reinforced structure is simple, makes easily;
2, relative to intermediate layer, the number of turn of differential minimizing high-tension coil initiating terminal and end, the space under rising is for increasing end insulated lengths, and end insulated lengthened is conducive to improving the class of insulation, reduces transformer insulated damage;
3, relative to intermediate layer, the number of turn of differential minimizing high-tension coil initiating terminal and end, reduces the peak value of voltge surge on the one hand by reducing magnetic flux density, reduce out-of-balance force on the other hand, greatly reduce transformer damage probability thus.
Accompanying drawing explanation
Fig. 1 is the utility model cross sectional representation, and figure mesohigh coil initiating terminal and end respectively establish two joint shoulders.
Fig. 2 is A place partial structurtes enlarged diagram in Fig. 1.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, the utility model is described in further detail.
Transformer high-voltage coil stagewise end insulation reinforced structure shown in Fig. 1, it comprises enamelled wire 1, end insulation 2 and layer insulation 3.Described enamelled wire 1 is wound in the high-tension coil of rectangle frame by the number of turn hierarchical sequence of design, and the enamelled wire 1 being positioned at internal layer is high-tension coil initiating terminal, and being positioned at outer field enamelled wire 1 is end, is separated by between adjacent layer enamelled wire 1 by layer insulation 3.Described end insulation 2 is attached on the circle outer wall of every layer of enamelled wire 1 most limit one, and end insulation 2 thickness equals the superposition one-tenth-value thickness 1/10 of every layer of enamelled wire 1.The present embodiment is the high-tension coil of 35KV power transformer, the enamelled wire 1 layering coiling of this high-tension coil, and initiating terminal divides the coiling in the lump of 2 layers of use 2 road enamelled wire 1, ground floor coiling turn ratio intermediate layer few 25%, second layer coiling turn ratio intermediate layer few 15%.End equally also divides 2 layers of coiling, last one deck coiling turn ratio intermediate layer few 20%, the second layer fewer than intermediate layer 10%.Be corner cuboid jaggy according to the high-tension coil cross section that above-mentioned parameter coiling is shaping, 2 length that insulate the external end in both sides, intermediate layer design routinely and are only 35mm, and initiating terminal and end reduce because of the number of turn of coiling, the breach that two ends stay is for widened end insulation 2.The supporting end in second layer both sides in the present embodiment after initiating terminal 2 width that insulate then increase to 40mm, and the end insulation of ground floor both sides increases to 46mm.The supporting end in last one deck end both sides 2 width that insulate increase to 44mm, and the supporting end insulation 2 in second layer both sides increases to 38mm.Improved by said structure, the supporting end of high-tension coil initiating terminal and end both sides 2 width that insulate all are widened, the end insulation 2 direct reinforced high pressure coil initiating terminals widened and the insulation property of end, raising anti overvoltage impact capacity.In addition, by reducing the coiling number of turn of high-tension coil initiating terminal and end, the peak value of voltge surge can be reduced, field intensity between lower layer, can out-of-balance force be reduced again, greatly reducing transformer damage probability thus.
Claims (3)
1. a transformer high-voltage coil stagewise end insulation reinforced structure, it comprises the insulation of enamelled wire (1) end (2) and layer insulation (3); Described enamelled wire (1) is wound in the high-tension coil of rectangle frame by the number of turn hierarchical sequence of design, the enamelled wire (1) being positioned at internal layer is high-tension coil initiating terminal, be positioned at outer field enamelled wire (1) for high-tension coil end, be separated by by layer insulation (3) between levels enamelled wire (1); Described end insulation (2) is the external insulating barrier being located at the most circle place, limit of every layer of enamelled wire (1), and end insulation (2) thickness equals the superposition one-tenth-value thickness 1/10 of every layer of enamelled wire (1); It is characterized in that: be corner cuboid jaggy with the high-tension coil cross section of enamelled wire (1) layering coiling, namely initiating terminal and the ecto-entad layering of end both sides inside contract, the breach stayed is for widened end insulation (2), and end insulation (2) that layering is widened forms stagewise end insulation reinforced structure.
2. transformer high-voltage coil stagewise end according to claim 1 insulation reinforced structure, is characterized in that: the initiating terminal of high-tension coil and end use respectively 1 ~ 3 road enamelled wire (1) in the lump order coiling form.
3. transformer high-voltage coil stagewise end insulation reinforced structure according to claim 1, it is characterized in that: the initiating terminal ground floor coiling turn ratio intermediate layer few 15 ~ 25% of high-tension coil, initiating terminal is divided into 2 ~ 4 layers of coiling, increases progressively by configuration number of plies decile; End last one deck coiling turn ratio intermediate layer few 10 ~ 20% of high-tension coil, end is divided into 2 ~ 4 layers of coiling, successively decreases by configuration number of plies decile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520287816.7U CN204577227U (en) | 2015-05-07 | 2015-05-07 | Transformer high-voltage coil stagewise end insulation reinforced structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520287816.7U CN204577227U (en) | 2015-05-07 | 2015-05-07 | Transformer high-voltage coil stagewise end insulation reinforced structure |
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| CN204577227U true CN204577227U (en) | 2015-08-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104835635A (en) * | 2015-05-07 | 2015-08-12 | 江苏扬动电气有限公司 | Stepwise end insulator strengthening structure for high-voltage coil of transformer |
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2015
- 2015-05-07 CN CN201520287816.7U patent/CN204577227U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104835635A (en) * | 2015-05-07 | 2015-08-12 | 江苏扬动电气有限公司 | Stepwise end insulator strengthening structure for high-voltage coil of transformer |
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Address after: 225500 Jiangsu province Taizhou city Jiangyan District Jiangyan Tianmu Road Economic Development Zone No. 690 (Jiangsu Yangdong Electric Co. Ltd.) Patentee after: Jiangsu Yangdian Technology Co., Ltd Address before: 225500 Jiangsu province Taizhou city Jiangyan District Jiangyan Tianmu Road Economic Development Zone No. 690 (Jiangsu Yangdong Electric Co. Ltd.) Patentee before: Jiangsu Yang Dong Electric Applicance Co., Ltd |