CN103050250A - Coil end insulation structure of transformer - Google Patents
Coil end insulation structure of transformer Download PDFInfo
- Publication number
- CN103050250A CN103050250A CN201210569257XA CN201210569257A CN103050250A CN 103050250 A CN103050250 A CN 103050250A CN 201210569257X A CN201210569257X A CN 201210569257XA CN 201210569257 A CN201210569257 A CN 201210569257A CN 103050250 A CN103050250 A CN 103050250A
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- China
- Prior art keywords
- transformer
- electrostatic ring
- insulation structure
- cross
- over block
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Abstract
The invention discloses a coil end insulation structure of a transformer. The coil end insulation structure comprises a voltage-sharing electrostatic ring, one end of the voltage-sharing electrostatic ring is a smooth arc connecting section, an insulation cushion block is arranged above a straight section of the voltage-sharing electrostatic ring, and the outer end of the insulation cushion block is within the straight section of the voltage-sharing electrostatic ring. The coil end insulation structure of the transformer has the advantage that insulation reliability of the integral transformer can be improved.
Description
Technical field
The present invention relates to a kind of the transformer coil terminal insulation structure.
Background technology
At present, high-power transformer such as voltage are higher than 110KV Class power transformer overhang insulation system: as shown in Figure 1, the end of all pressing electrostatic ring 21 is smooth circular arc linkage section 31, all press straightway 41 tops of electrostatic ring 21 to be provided with cross-over block 11, the outer end of cross-over block 11 extends through the top that is positioned at circular arc linkage section 31 behind the straightway 41 of all pressing electrostatic ring 21, so that cross-over block 11 and all press between the circular arc linkage section 31 of electrostatic ring 21 and form " wedge shape " gap.After the transformer with above-mentioned the transformer coil terminal insulation structure is positioned in the oil tank of transformer that transformer oil 51 is housed, owing to always have air or bubble because of many reasons in " wedge shape " gap, so that the bottom of cross-over block 11 and all press between the circular arc linkage section 31 of electrostatic ring 21 and can form " oil film wedge ", be that transformer oil 51 soaks in not saturating " wedge shape " gap, will make like this maximum field strength appear at " oil film wedge " zone, so that the incipient discharge voltage of " oil film wedge " regional partial discharge is lower than other regional incipient discharge voltage, partial discharge phenomenon just easily occurs in " oil film wedge " zone, thereby has reduced the insulation property of whole transformer.
Summary of the invention
The purpose of this invention is to provide a kind of a kind of the transformer coil terminal insulation structure that can improve the insulating reliability of whole transformer.
For achieving the above object, the present invention has adopted following technical scheme: described a kind of the transformer coil terminal insulation structure, comprise: the end is all pressures electrostatic ring of smooth circular arc linkage section, all press the straightway top of electrostatic ring to be provided with cross-over block, the outer end of cross-over block does not extend through outside the straightway of all pressing electrostatic ring.
Further, aforesaid a kind of the transformer coil terminal insulation structure, wherein: the outer end of cross-over block just in time flushes with the outside of the straightway of all pressing electrostatic ring.
By the enforcement of technique scheme, the present invention has the advantage of the insulating reliability that can improve whole transformer.
Description of drawings
Fig. 1 is the structural representation of the transformer coil terminal insulation structure described in the background technology.
Fig. 2 is the structural representation of a kind of the transformer coil terminal insulation structure of the present invention.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 2, described a kind of the transformer coil terminal insulation structure, comprise: the end is all pressures electrostatic ring 2 of smooth circular arc linkage section 3, all presses straightway 4 tops of electrostatic ring 2 to be provided with cross-over block 1, and the outer end of cross-over block 1 does not extend through outside the straightway 4 of all pressing electrostatic ring 2; In the present embodiment, the outer end of cross-over block 1 just in time flushes with the outside of the straightway 4 of all pressing electrostatic ring 2.Such cross-over block 1 and all press between the circular arc linkage section 3 of electrostatic ring 2 and can not form " wedge shape " gap, after the transformer with the transformer coil terminal insulation structure of the present invention is positioned in the oil tank of transformer that transformer oil 5 is housed, the bottom of cross-over block 1 and all press between the circular arc linkage section 3 of electrostatic ring 2 and can not form " oil film wedge ", so just avoided making this place's electric field strength become large phenomenon owing to transformer oil 5 soaks not saturating " wedge shape " gap, and then improved the incipient discharge voltage of partial discharge of transformer, improved the insulating reliability of whole transformer.
Claims (2)
1. the transformer coil terminal insulation structure, comprise: the end is all pressures electrostatic ring of smooth circular arc linkage section, all press the straightway top of electrostatic ring to be provided with cross-over block, it is characterized in that: the outer end of cross-over block does not extend through outside the straightway of all pressing electrostatic ring.
2. a kind of the transformer coil terminal insulation structure according to claim 1, it is characterized in that: the outer end of cross-over block just in time flushes with the outside of the straightway of all pressing electrostatic ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210569257XA CN103050250A (en) | 2012-12-25 | 2012-12-25 | Coil end insulation structure of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210569257XA CN103050250A (en) | 2012-12-25 | 2012-12-25 | Coil end insulation structure of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103050250A true CN103050250A (en) | 2013-04-17 |
Family
ID=48062859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210569257XA Pending CN103050250A (en) | 2012-12-25 | 2012-12-25 | Coil end insulation structure of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103050250A (en) |
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 |
| CN107170569A (en) * | 2017-05-30 | 2017-09-15 | 闫会云 | A kind of coil insulation structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55148410A (en) * | 1979-05-09 | 1980-11-19 | Hitachi Ltd | Oil-filled electric induction apparatus |
| JPS59168617A (en) * | 1983-03-15 | 1984-09-22 | Toshiba Corp | Foil wound transformer |
| JPS6064415A (en) * | 1983-09-19 | 1985-04-13 | Hitachi Ltd | Oil-immersed transformer |
| JPS60200509A (en) * | 1984-03-26 | 1985-10-11 | Hitachi Ltd | Transformer for dc power transmission |
| JPH05291060A (en) * | 1992-04-07 | 1993-11-05 | Toshiba Corp | Transformer winding wire |
| CN203055637U (en) * | 2012-12-25 | 2013-07-10 | 保定天威集团(江苏)五洲变压器有限公司 | Insulation structure of end portion of transformer coil |
-
2012
- 2012-12-25 CN CN201210569257XA patent/CN103050250A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55148410A (en) * | 1979-05-09 | 1980-11-19 | Hitachi Ltd | Oil-filled electric induction apparatus |
| JPS59168617A (en) * | 1983-03-15 | 1984-09-22 | Toshiba Corp | Foil wound transformer |
| JPS6064415A (en) * | 1983-09-19 | 1985-04-13 | Hitachi Ltd | Oil-immersed transformer |
| JPS60200509A (en) * | 1984-03-26 | 1985-10-11 | Hitachi Ltd | Transformer for dc power transmission |
| JPH05291060A (en) * | 1992-04-07 | 1993-11-05 | Toshiba Corp | Transformer winding wire |
| CN203055637U (en) * | 2012-12-25 | 2013-07-10 | 保定天威集团(江苏)五洲变压器有限公司 | Insulation structure of end portion of transformer coil |
Cited By (3)
| 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 |
| CN107170569A (en) * | 2017-05-30 | 2017-09-15 | 闫会云 | A kind of coil insulation structure |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130417 |