CN203774066U - Dry-type transformer - Google Patents
Dry-type transformer Download PDFInfo
- Publication number
- CN203774066U CN203774066U CN201420201018.3U CN201420201018U CN203774066U CN 203774066 U CN203774066 U CN 203774066U CN 201420201018 U CN201420201018 U CN 201420201018U CN 203774066 U CN203774066 U CN 203774066U
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- CN
- China
- Prior art keywords
- dry
- shield cap
- type transformer
- metal
- voltage coil
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Abstract
The utility model relates to a dry-type transformer and relates to the technical field of transformers. The dry-type transformer comprises a low-voltage coil, a high-voltage coil, insulation cushion blocks, a metal shield cap, a metal pressure nail, a clamping piece and a metal gasket, wherein the bottoms of the low-voltage coil and the high-voltage coil are respectively provided with the insulation cushion block, the bottom of each insulation cushion block is provided with the metal shield cap, the metal shield cap is connected with the grounded metal pressure nail by virtue of the metal gasket, the metal pressure nail is fixedly connected with the clamping piece, the high-voltage shield cap is matched with a groove on the bottom of each insulation cushion block in an embedding manner, the high-voltage shield cap is cylindrical, and the bottom of the clamping piece is also provided with an insulation shock-absorption pad, so that the noise produced by the vibration of the transformer when in work can be avoided. The dry-type transformer is reasonable in insulation structure, capable of avoiding the local discharging and capable of greatly prolonging the service life.
Description
Technical field
The utility model relates to transformer technology field, be specifically related to a kind of dry-type transformer.
Background technology
Epoxide resin material is widely used in the power equipments such as transformer, instrument transformer and insulator as main insulating material now and manufactures field.Cast Resin Dry-Type Transformer has the features such as difficult combustion, safe, reliable, easy to maintenance and volume be little, in places such as the skyscraper in city and power stations, is widely used.But traditional SCB dry-type transformer exists partial discharge phenomenon, this is mainly because the electromagnetic wire of dry-type transformer inside, insulating part are wanted rounding, can not have any wedge angle and burr.Because under high electric field strength effect, charge capacity focuses on the place of wedge angle, thereby causes electric discharge.Poured with epoxy resin insulating dry type transformer, when vacuum pouring, as badly in technology controlling and process also can cause inside to have bubble and produce partial discharge.When design, the field intensity of interlayer or circle is too high also can the office of causing put increase.Also there is no at present concrete solution.
Utility model content
For the deficiency existing in prior art, the utility model provides a kind of dry-type transformer, and insulation system is reasonable, has avoided partial discharge, thereby has greatly improved the useful life of transformer.
To achieve these goals, the utility model is to realize by the following technical solutions: dry-type transformer, comprise low-voltage coil, high-tension coil, cross-over block, metallic shield cap, metal nail pressing, folder and metallic gasket, low-voltage coil, high-tension coil bottom is provided with cross-over block, cross-over block bottom is provided with metallic shield cap, metallic shield cap is connected with the metal nail pressing of ground connection by metallic gasket, metal nail pressing and folder fix, described high-tension shielding cap closes with the groove phase scarf of cross-over block bottom, described high-tension shielding cap is cylindrical, described folder bottom is also provided with insulation beam, avoid transformer when work, to produce vibration, minimizing is because of the noise of generation of vibration.
As preferably, described cross-over block is insulating resin cushion block, can play insulating effect well.
As preferably, between described low-voltage coil, high-tension coil, be plugged with V-type square ring, can increase creepage distance, reduce cost.
The beneficial effect of this embodiment: insulation system is reasonable, has avoided partial discharge, thereby has greatly improved the useful life of transformer.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, describe the utility model in detail;
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of low-voltage coil of the present utility model, high-tension coil.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with embodiment, further set forth the utility model.
With reference to Fig. 1-2, this embodiment is by the following technical solutions: dry-type transformer, comprise low-voltage coil 1, high-tension coil 2, cross-over block 3, metallic shield cap 4, metal nail pressing 5, folder 6 and metallic gasket 7, low-voltage coil 1, high-tension coil 2 bottoms are provided with cross-over block 3, cross-over block 3 bottoms are provided with metallic shield cap 4, metallic shield cap 4 is connected with the metal nail pressing 5 of ground connection by metallic gasket 7, metal nail pressing 5 fixes with folder 6, described high-tension shielding cap 4 closes with the groove phase scarf of cross-over block 3 bottoms, described high-tension shielding cap 4 is cylindrical, described folder 6 bottoms are also provided with insulation beam, avoid transformer when work, to produce vibration, minimizing is because of the noise of generation of vibration.
It should be noted that described cross-over block 3, for insulating resin cushion block, can play insulating effect well.
In addition, between described low-voltage coil 1, high-tension coil 2, be plugged with V-type square ring 8, can increase creepage distance, reduce cost.
This embodiment metallic shield cap 7 is connected by the metal nail pressing 5 of metallic gasket 4 and ground connection, thereby mask, is added in the field intensity on air-gap between cushion block and nail pressing, and all field intensity are all added on the better epoxy resin of insulation property, and office puts and is less than 5pC.
The dry-type transformer of this embodiment is widely used in localized lighting, skyscraper Shanghai benevolence is protected as natural air cooling (AN) and forced air cooling (AF).During natural air cooling, transformer can long-term operation continuously under rated capacity.During forced air cooling, transformer output capacity can improve 50%.Be applicable to interrupted running overload, or emergent accident running overload.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. dry-type transformer, it is characterized in that, comprise low-voltage coil (1), high-tension coil (2), cross-over block (3), metallic shield cap (4), metal nail pressing (5), folder (6) and metallic gasket (7), low-voltage coil (1), high-tension coil (2) bottom are provided with cross-over block (3), cross-over block (3) bottom is provided with metallic shield cap (4), metallic shield cap (4) is connected with the metal nail pressing (5) of ground connection by metallic gasket (7), and metal nail pressing (5) fixes with folder (6); Described high-tension shielding cap (4) closes with the groove phase scarf of cross-over block (3) bottom, and described high-tension shielding cap (4) is that cylindrical, described folder (6) bottom is also provided with insulation beam.
2. dry-type transformer according to claim 1, is characterized in that, described cross-over block (3) is insulating resin cushion block.
3. dry-type transformer according to claim 1, is characterized in that, between described low-voltage coil (1), high-tension coil (2), is plugged with V-type square ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420201018.3U CN203774066U (en) | 2014-04-17 | 2014-04-17 | Dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420201018.3U CN203774066U (en) | 2014-04-17 | 2014-04-17 | Dry-type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203774066U true CN203774066U (en) | 2014-08-13 |
Family
ID=51291224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420201018.3U Expired - Fee Related CN203774066U (en) | 2014-04-17 | 2014-04-17 | Dry-type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203774066U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111801759A (en) * | 2017-12-15 | 2020-10-20 | Abb瑞士股份有限公司 | Fixing system for medium-voltage or high-voltage switching poles |
-
2014
- 2014-04-17 CN CN201420201018.3U patent/CN203774066U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111801759A (en) * | 2017-12-15 | 2020-10-20 | Abb瑞士股份有限公司 | Fixing system for medium-voltage or high-voltage switching poles |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20160417 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |