CN204614640U - Transformer electrostatic ring cross section structure - Google Patents
Transformer electrostatic ring cross section structure Download PDFInfo
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- CN204614640U CN204614640U CN201520141969.0U CN201520141969U CN204614640U CN 204614640 U CN204614640 U CN 204614640U CN 201520141969 U CN201520141969 U CN 201520141969U CN 204614640 U CN204614640 U CN 204614640U
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Abstract
The utility model belongs to transformer apparatus technical field, particularly a kind of transformer electrostatic ring cross section structure.This transformer electrostatic ring cross section structure comprises electrostatic ring basic ring and wire, electrostatic ring basic ring and wire outer end are wound with aluminum metallization crimped paper, crimped paper and cable paper successively, it is characterized in that: the insulation thickness that described electrostatic ring basic ring is adjacent distance between coil First Line cake and electrostatic ring basic ring surface is reduced into the half of conventional electrostatic cyclic group ring near the thickness of coil sides.Structure is simple, easy to use; By changing the wrapping mode of electrostatic ring outsourcing insulation, electrostatic ring being decreased to half near the insulation thickness of coil sides, thus increasing longitudinal electric capacity, reduction electrostatic ring surface creepage probability; Cost is low, easy to utilize.
Description
(1) technical field
The utility model relates to a kind of transformer electrostatic ring cross section structure, belongs to transformer apparatus technical field.
(2) background technology
Along with the raising of electric pressure, the atmospheric over-voltage that transformer bears, switching overvoltage level are more and more higher, in order to ensure the reliability of transformer, usually need to improve electrode shape to improve effective insulation distance.In the past, transformer coil end design electrostatic ring of being everlasting, electrostatic ring can not only improve the electrode shape of end winding, reduces the insulation distance of winding to hardwares such as Double layer iron yokes, and it also has very important significance to the longitudinal electric capacity of increase winding; The longitudinal electric capacity of coil is larger, transformer coil is under lightning impulse voltage effect, its initial spread voltage is more close to final spread voltage, the concussion of lightning impulse voltage in coil is less, more be tending towards even along the distribution in coil short transverse, under the prerequisite of same dielectric nargin, turn insulation thickness and oil duct size can reduce further.
In order to the electric field strength on electrostatic ring surface is controlled within allowable value scope, usual needs cover certain thickness insulating barrier at electrostatic ring electrode surface, along with the raising of coil insulation level, the thickness of its insulating barrier also increases thereupon, consider simultaneously and usually leave the heat radiation oil duct of 3-6mm between electrostatic ring and coil by the needs that end winding dispels the heat; The distance finally making electrostatic ring electrode be adjacent between line cake is larger, from capacitance calculation formula, electric capacity between electrostatic ring and adjacent First Line cake diminishes, this obviously bears lightning impulse voltage to this coil is disadvantageous, in addition, because transformer electrostatic ring in test with operation is directly connected with the first head of coil, between electrostatic ring and First Line cake, electric potential gradient is less, along with the increase of its distance, the equipotential line of arc-shaped will be formed at the edge of two electrodes, to the generation of this place along face creepage phenomenon be contributed to, the coefficient of safety of transformer is reduced.
(3) summary of the invention
The utility model, in order to make up the defect of prior art, provides a kind of structure simple, can increase longitudinal electric capacity thus the transformer electrostatic ring cross section structure of reduction electrostatic ring surface creepage probability.
The utility model is achieved by the following technical solution:
A kind of transformer electrostatic ring cross section structure, comprise electrostatic ring basic ring and wire, electrostatic ring basic ring and wire outer end are wound with aluminum metallization crimped paper, crimped paper and cable paper successively, it is characterized in that: the insulation thickness that described electrostatic ring basic ring is adjacent distance between coil First Line cake and electrostatic ring basic ring surface is reduced into the half of conventional electrostatic cyclic group ring near the insulation thickness of coil sides.
Wherein:
Stupefied and the wire termination in described electrostatic ring basic ring limit is round and smooth and without wedge angle and burr.
The utility model is by changing the wrapping mode of electrostatic ring outsourcing insulation, electrostatic ring basic ring is decreased to half near the insulation thickness of coil sides, the insulation thickness of electrostatic ring other parts remains unchanged, the insulation distance that electrostatic ring is adjacent between coil First Line cake is reduced, increase the electric capacity at this position, also improve the distribution of two electrode edge place equipotential lines simultaneously, to improve transformer dielectric strength, reduce that window unshakable in one's determination is high to have great importance.
The utility model is applicable to voltage 110kV and above power transformer and converter transformer.
The beneficial effects of the utility model are: structure is simple, easy to use; By changing the wrapping mode of electrostatic ring outsourcing insulation, electrostatic ring being decreased to half near the insulation thickness of coil sides, thus increasing longitudinal electric capacity, reduction electrostatic ring surface creepage probability; Cost is low, easy to utilize.
(4) accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Accompanying drawing 1 is the utility model transformer electrostatic ring cross section structure schematic diagram;
Accompanying drawing 2 is traditional transformer electrostatic ring sectional view;
In figure: 1, electrostatic ring basic ring; 2, wire; 3, aluminum metallization crimped paper; 4, crimped paper; 5, cable paper.
Embodiment
Accompanying drawing is specific embodiment of the utility model.
The utility model transformer electrostatic ring cross section structure as shown in Figure 1, comprise electrostatic ring basic ring 1 and wire 2, electrostatic ring basic ring 1 and wire 2 outer end are wound with aluminum metallization crimped paper 3, crimped paper 4 and cable paper 5 successively, and the insulation thickness that described electrostatic ring basic ring 1 is adjacent distance between coil First Line cake and electrostatic ring basic ring 1 surface is reduced into the half of conventional electrostatic cyclic group ring near the insulation thickness of coil sides.
The utility model is by changing the wrapping mode of electrostatic ring outsourcing insulation, electrostatic ring basic ring 1 is decreased to half near the insulation thickness of coil sides: first the wedge angle on electrostatic ring basic ring 1, burr fine sandpaper sand are fallen, make its limit stupefied round and smooth, and the little tooth file in wire 2 end is frustrated round and smooth according to technological requirement, guarantee without wedge angle, burr; Then, wire 2 is placed on the center line of electrostatic ring basic ring 1 lower surface, and near the wrapped aluminum metallization crimped paper 3 of wire 2, the metal covering of aluminum metallization crimped paper 3 is by wire 2; Secondly, half lap wrapping is carried out to specific thickness along electrostatic ring basic ring 1 with two 0.05 × 25 crimped papers 4, in wrapping process, when two 0.05 × 25 crimped papers 4 are in electrostatic ring basic ring lower surface position, upper strata in two 0.05 × 25 crimped papers 4 is cut, clipped position and sheared length will guarantee even transition between each layer insulation in the two ends of electrostatic ring basic ring 1 lower surface, to ensure the radius of corner at this place; Finally, outside the electrostatic ring wrapping crimped paper 4, prick with cable paper 5 flower, to guarantee static board insulation closely, local pressure is indeformable.
Traditional transformer electrostatic ring cross section structure as shown in Figure 2, comprise electrostatic ring basic ring 1 and wire 2, electrostatic ring basic ring 1 and wire 2 outer end are wound with aluminum metallization crimped paper 3 successively, crimped paper 4 and cable paper 5, compared with traditional transformer electrostatic ring cross section structure, electrostatic ring basic ring 1 is decreased to half near the insulation thickness of coil sides by the utility model, the insulation thickness of electrostatic ring basic ring other parts remains unchanged, the insulation distance that electrostatic ring basic ring 1 is adjacent between coil First Line cake is reduced, increase the electric capacity at this position, also improve the distribution of two electrode edge place equipotential lines simultaneously, to the dielectric strength improving transformer, reduce that window unshakable in one's determination is high to have great importance.
Claims (2)
1. a transformer electrostatic ring cross section structure, comprise electrostatic ring basic ring (1) and wire (2), electrostatic ring basic ring (1) and wire (2) outer end are wound with aluminum metallization crimped paper (3), crimped paper (4) and cable paper (5) successively, it is characterized in that: the insulation thickness that described electrostatic ring basic ring (1) is adjacent distance between coil First Line cake and electrostatic ring basic ring (1) surface is reduced into the half of conventional electrostatic cyclic group ring near the insulation thickness of coil sides.
2. transformer electrostatic ring cross section structure according to claim 1, is characterized in that stupefied and wire (2) end, described electrostatic ring basic ring (1) limit is round and smooth and without wedge angle and burr.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520141969.0U CN204614640U (en) | 2015-03-13 | 2015-03-13 | Transformer electrostatic ring cross section structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520141969.0U CN204614640U (en) | 2015-03-13 | 2015-03-13 | Transformer electrostatic ring cross section structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204614640U true CN204614640U (en) | 2015-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520141969.0U Active CN204614640U (en) | 2015-03-13 | 2015-03-13 | Transformer electrostatic ring cross section structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN204614640U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106449062A (en) * | 2016-11-18 | 2017-02-22 | 卧龙电气集团股份有限公司 | Capacitance loop for high voltage transformer |
-
2015
- 2015-03-13 CN CN201520141969.0U patent/CN204614640U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106449062A (en) * | 2016-11-18 | 2017-02-22 | 卧龙电气集团股份有限公司 | Capacitance loop for high voltage transformer |
| CN106449062B (en) * | 2016-11-18 | 2018-07-20 | 卧龙电气集团股份有限公司 | Capacitance ring for high voltage transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20200806 Granted publication date: 20150902 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20200821 Granted publication date: 20150902 |