CN204632544U - A kind of dry transformer high-tension coil insulation system - Google Patents
A kind of dry transformer high-tension coil insulation system Download PDFInfo
- Publication number
- CN204632544U CN204632544U CN201520301720.1U CN201520301720U CN204632544U CN 204632544 U CN204632544 U CN 204632544U CN 201520301720 U CN201520301720 U CN 201520301720U CN 204632544 U CN204632544 U CN 204632544U
- Authority
- CN
- China
- Prior art keywords
- insulation
- tension coil
- coil
- electric screen
- insulation system
- 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.)
- Active
Links
Landscapes
- Coils Of Transformers For General Uses (AREA)
- Insulating Of Coils (AREA)
- Regulation Of General Use Transformers (AREA)
Abstract
A kind of dry transformer high-tension coil insulation system, be all arrange one deck electric screen in the primary insulation and outer layer insulation of high-tension coil, two-layer electric screen is respectively by the direct ground connection of lead-out wire.This insulation system by increasing the mode of shielding in the primary insulation and outer layer insulation of high-tension coil, improve the Electric Field Distribution of high-tension coil, reduce the insulation distance between high-tension coil and low-voltage coil, out-phase high-tension coil, effectively reduce in running the possibility that creeping discharge occurs, improve power supply reliability; Save material that is unshakable in one's determination and coil, save design cost.
Description
Technical field
The utility model relates to a kind of high-voltage coil insulation structure being applicable to high altitude localities dry-type transformer, belongs to distribution transformer manufacturing technology field.
Background technology
The external isolation media of Cast Resin Dry-Type Transformer is air, high altitude localities rarefaction of air, and under same nominal voltage conditions, the electric insulation distance required in air dielectric is large.At present, the conventional method of design high altitude localities dry-type transformer is the distance increasing exterior insulation, comprise high-tension coil to the insulation distance etc. between the insulation distance of low-voltage coil, out-phase high-tension coil, this not only can cause the increase of design cost and the waste of material, also insulation can be caused unreliable because of external environmental factor.Moreover, for the dry transformer high-tension coil that grade of rated voltage is greater than 10kV, by the restriction of self physical dimension and manufacturing process, in running, easily there is the phenomenon of creeping discharge because producing switching overvoltage.
Summary of the invention
In order to overcome the deficiency that existing dry transformer coil structure is applied in high altitude localities, the utility model proposes a kind of can reduce high altitude localities dry-type transformer insulation distance and running in there is the dry transformer high-tension coil insulation system of creeping discharge possibility.
Dry transformer high-tension coil insulation system of the present utility model, be all arrange one deck electric screen in the primary insulation and outer layer insulation of high-tension coil, two-layer electric screen is respectively by the direct ground connection of lead-out wire.
The utility model by increasing the mode of shielding in the primary insulation and outer layer insulation of high-tension coil, improve the Electric Field Distribution of high-tension coil, reduce the insulation distance between high-tension coil and low-voltage coil, out-phase high-tension coil, effectively reduce in running the possibility that creeping discharge occurs, improve power supply reliability; Save material that is unshakable in one's determination and coil, save design cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model dry transformer high-tension coil insulation system;
In figure: 1. internal layer electric screen, 2. primary insulation, 3. segmented layered winding, 4. section insulation, 5. earth connection, 6. outer electric screen, 7. outer layer insulation, 8. earth connection.
Embodiment
As shown in Figure 1, the high-voltage coil insulation structure of dry-type transformer of the present utility model, its built-in electrical insulation medium is epoxy resin, and the primary insulation 2 of high-tension coil, section insulation 4 and outer layer insulation 7 are poured with epoxy resin, and external isolation media is air.
Because insulation distance in the air dielectric of high altitude localities is large, for reducing the physical dimension of dry-type transformer, increase internal layer electric screen 1 in primary insulation 2, internal layer electric screen 1 is by earth connection 5 directly ground connection.Increase outer electric screen 6 in outer layer insulation 7, outer electric screen 6 is by earth connection 8 directly ground connection.Internal layer electric screen 1 and outer electric screen 6 adopt overlapping mode, effectively by the electric field shielding of high-tension coil, improve the distribution of coil outer electric field strength.
Join at outer electric screen 6 and cut circular open, be convenient to the tap lead wire of the segmented layered winding 3 of high-tension coil, when dry-type transformer grade of rated voltage is greater than 10kV, increase suitable shielding mode in tap lead wire position.
Claims (1)
1. a dry transformer high-tension coil insulation system, is characterized in that, in the primary insulation and outer layer insulation of high-tension coil, all arrange one deck electric screen, and two-layer electric screen is respectively by the direct ground connection of lead-out wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520301720.1U CN204632544U (en) | 2015-05-12 | 2015-05-12 | A kind of dry transformer high-tension coil insulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520301720.1U CN204632544U (en) | 2015-05-12 | 2015-05-12 | A kind of dry transformer high-tension coil insulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204632544U true CN204632544U (en) | 2015-09-09 |
Family
ID=54051546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520301720.1U Active CN204632544U (en) | 2015-05-12 | 2015-05-12 | A kind of dry transformer high-tension coil insulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204632544U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867666A (en) * | 2015-05-12 | 2015-08-26 | 山东电工电气集团智能电气有限公司 | Dry-type transformer high-voltage coil insulation structure |
-
2015
- 2015-05-12 CN CN201520301720.1U patent/CN204632544U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104867666A (en) * | 2015-05-12 | 2015-08-26 | 山东电工电气集团智能电气有限公司 | Dry-type transformer high-voltage coil insulation structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203746591U (en) | High voltage basin type insulator with metal insert | |
| CN103680883A (en) | 500kV-level split on-load voltage regulation power transformer | |
| CN107546018B (en) | Three-phase combined type voltage transformer internal body with primary melting core | |
| CN204632544U (en) | A kind of dry transformer high-tension coil insulation system | |
| CN203377069U (en) | Coil of rolled iron core transformer | |
| CN102623153A (en) | Insulating sheath for current transformer | |
| CN102360833A (en) | Cellular epoxy resin insulation body for dry transformer | |
| CN201859755U (en) | Coil of dry type transformer | |
| CN104867666A (en) | Dry-type transformer high-voltage coil insulation structure | |
| CN202405081U (en) | Novel dry-transformer coil | |
| CN203871158U (en) | SG three-phase dry type transformer | |
| CN204732270U (en) | A kind of buried six phase 12 pulse wave rectifier transformers | |
| CN203038774U (en) | Indoor dry-type voltage transformer | |
| CN203733594U (en) | Main insulating structure of power distribution transformer | |
| CN203659596U (en) | 35kV transformer coil structure | |
| CN203910460U (en) | Double-foil-winding energy-saving power distribution transformer | |
| CN208738015U (en) | A kind of 35kV oil-immersed power transformer high-low pressure winding Main Insulation Structure of Electric | |
| CN202940106U (en) | Dry-type transformer with open coiled iron cores | |
| CN203466032U (en) | Winding structure of multi-winding transformer | |
| CN203366935U (en) | Improved dry type transformer | |
| CN202816628U (en) | High-frequency insulation power transformer | |
| CN201812656U (en) | Main insulating structure of dry transformer | |
| CN204834307U (en) | Insulator arrangement of dry -type transformer coil | |
| CN204558227U (en) | A kind of outdoor vacuum switch power transformer | |
| CN203733602U (en) | Three-phase and three-column amorphous alloy oil-immersed transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |