CN202903958U - An apparatus for testing characteristics of breakdowns under an oil flow of paper oil insulation of a transformer - Google Patents
An apparatus for testing characteristics of breakdowns under an oil flow of paper oil insulation of a transformer Download PDFInfo
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- CN202903958U CN202903958U CN 201220663065 CN201220663065U CN202903958U CN 202903958 U CN202903958 U CN 202903958U CN 201220663065 CN201220663065 CN 201220663065 CN 201220663065 U CN201220663065 U CN 201220663065U CN 202903958 U CN202903958 U CN 202903958U
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Abstract
An apparatus for testing characteristics of breakdowns under an oil flow of paper oil insulation of a transformer belongs to the technical field of high voltage and insulation, and aims to solve the problems that a conventional electric strength inspection device is difficult to install due to machining errors and has flashovers frequently. The apparatus comprises a high-voltage sleeve, a high-voltage sleeve lower connecting piece, an upper electrode connecting piece, an upper electrode, an upper electrode insulating piece, a lower electrode insulating piece, insulating screws, insulating nuts, a lower electrode, an insulating paper board, an oil channel, a grounding bolt, an oil inlet, an oil outlet, an oil inlet connecting piece, and an oil outlet connecting piece, wherein the high-voltage sleeve lower connecting piece, the upper electrode connecting piece, the upper electrode, the upper electrode insulating piece, the lower electrode insulating piece, the insulating screws, the insulating nuts, the lower electrode, the insulating paper board, the oil channel, and the grounding bolt are arranged inside a high-voltage test cabinet; the upper electrode is located right above the lower electrode; the upper electrode is embedded in the interior of the upper electrode insulating piece while the lower electrode is embedded in the interior of the lower electrode insulating piece; and the upper electrode insulating piece is arranged above the lower electrode insulating piece.
Description
Technical field
The utility model relates to transformer oil paper insulation oil and flows down the breakdown characteristics test unit, belongs to the high voltage and insulation technology field.
Background technology
Along with the sustainable growth of national economy, energy demand is improved day by day, the high voltage long distance power transmission has become the strategic issue that affects economic development.Office of national energy leading group classifies the extra-high voltage grid construction as the main points of working energy.The raising of transformer voltage grade is so that more and more higher to transformer insulated requirement, and the at present interior insulation of transformer is carried on as before owing to manufacturing process and insulating property etc. are former and adopted paper oil insulation as principal mode.Increase along with transformer capacity, requirement to the transformer heat dispersion also improves greatly, one of effective measures that improve radiating efficiency are increases the insulating oil flow velocity, and the increase of insulating oil flow velocity brings many impacts will for the oilpaper compound inslation, as: the oil flow electrification intensity that increases oil-paper combination insulation with flow velocity will increase, may cause shelf depreciation corrosion insulating board, carried charge reduces the electric strength of oil in the increase oil, thereby paper oil insulation is damaged; But the increase of flow velocity may destroy the formation of conductive impurity foot bridge in the oil, improves weak link---the electric strength of insulating oil in the oil-paper combination insulation, thereby improves oil-paper combination insulation integral insulation performance, and other unknown influence factors etc.As seen, the variation of insulating oil flow velocity will form the insulating property of oil-paper combination insulation useful or injurious effects, need be paid attention to, but in the past to research is very few in this respect, lack the method and apparatus of systematic study.
Existing electric strength verifying attachment is installed difficulty because mismachining tolerance causes, and often has flashover to occur.
Summary of the invention
The utility model purpose is because mismachining tolerance causes difficulty to be installed in order to solve existing electric strength verifying attachment, and the problem that often has flashover to occur, and provides a kind of transformer oil paper insulation oil to flow down the breakdown characteristics test unit.
Transformer oil paper insulation oil described in the utility model flows down the breakdown characteristics test unit, it comprises web member under bushing, the bushing, top electrode web member, top electrode, top electrode insulating part, bottom electrode insulating part, insulation blanket stud, insulation nut, bottom electrode, insulating board, oil duct, earth stud, oil-in, oil-out, oil inlet connecting piece and oil-out web member
Web member, top electrode web member, top electrode, top electrode insulating part, bottom electrode insulating part, insulation blanket stud, insulation nut, bottom electrode, insulating board, oil duct and earth stud are arranged in the high-potting casing under the bushing,
Top electrode be arranged on bottom electrode directly over,
It is inner that top electrode embeds the top electrode insulating part, it is inner that bottom electrode embeds the bottom electrode insulating part, the top electrode insulating part is arranged on bottom electrode insulating part top, insulating board is fixedly clamped by top electrode insulating part and bottom electrode insulating part, the top electrode insulating part by insulation blanket stud and the insulation nut be fixed with the bottom electrode insulating part on, the bottom electrode insulating part is fixed on the high-potting casing by oil inlet connecting piece and oil-out web member, cavity between top electrode insulating part and the bottom electrode insulating part forms oil duct, oil-in and oil-out are communicated with high-potting casing outside and oil duct
The lower end of top electrode web member is threaded with top electrode, and the upper end of top electrode web member reaches under the bushing in the web member,
The high-pressure conductive core is introduced in the high-potting casing by bushing, and the high-pressure conductive core lower end in the bushing reaches under the bushing in the web member, and is threaded with web member under the bushing, and the high-pressure conductive core in the bushing is electrically connected with top electrode,
Described bottom electrode is fixedly attached to earth stud.
Advantage of the present utility model: the utility model is by the relative position between the fixing upper and lower electrode of upper and lower electrode insulation spare and the insulating board, and the formation oil duct, and a kind of device that can carry out to oil-paper combination insulation electric strength check under the different in flow rate is provided.Adopt the mode that moves with the touch to prevent the installation difficulty that the mismachining tolerance accumulation causes high-voltage power supply being introduced in the top electrode process, process the multiple tracks groove at electrode supporting insulating part inside surface, to improve flashover voltage, prevent that flashover from occuring.
Description of drawings
Fig. 1 is the structural representation that transformer oil paper insulation oil described in the utility model flows down the breakdown characteristics test unit.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1, the described transformer oil paper insulation of present embodiment oil flows down the breakdown characteristics test unit, it comprises web member 2 under bushing 1, the bushing, top electrode web member 3, top electrode 4, top electrode insulating part 5, bottom electrode insulating part 6, insulation blanket stud 7, insulation nut 8, bottom electrode 9, insulating board 10, oil duct 11, earth stud 12, oil-in 13, oil-out 14, oil inlet connecting piece 15 and oil-out web member 16
Top electrode 4 be arranged on bottom electrode 9 directly over,
Top electrode 4 embeds top electrode insulating part 5 inside, bottom electrode 9 embeds bottom electrode insulating part 6 inside, top electrode insulating part 5 is arranged on bottom electrode insulating part 6 tops, insulating board 10 is fixedly clamped by top electrode insulating part 5 and bottom electrode insulating part 6, top electrode insulating part 5 by insulation blanket stud 7 and insulation nut 8 be fixed with bottom electrode insulating part 6 on, bottom electrode insulating part 6 is fixed on the high-potting casing by oil inlet connecting piece 15 and oil-out web member 16, cavity between top electrode insulating part 5 and the bottom electrode insulating part 6 forms oil duct 11, oil-in 13 and oil-out 14 are communicated with the outside and oil duct 11 of high-potting casing
The lower end of top electrode web member 3 is threaded with top electrode 4, and the upper end of top electrode web member 3 reaches under the bushing in the web member 2,
The high-pressure conductive core is introduced in the high-potting casing by bushing 1, high-pressure conductive core lower end in the bushing 1 reaches under the bushing in the web member 2, and be threaded the high-pressure conductive core in the bushing 1 and top electrode 4 electrical connections with web member 2 under the bushing
Described bottom electrode 9 is fixedly attached to earth stud 12, and earth stud 12 links to each other with ground wire.
When insulating oil flows into the oil duct 11 of top electrode insulating part 5 and 6 formation of bottom electrode insulating part from oil-in 13, consist of oil with insulating board 10 and flow down the oil-paper combination insulation structure, when after top electrode 4 and 9 of bottom electrodes apply high voltage, to form electric field between two electrodes, boosted voltage is with the breakdown characteristics of paper oil insulation under the test different in flow rate gradually.
Embodiment two: present embodiment is described further embodiment one, and adopting movingly between the web member 2 under top electrode web member 3 and the bushing, mode connects.Prevent because the connection that the mismachining tolerance accumulation causes is difficult, thereby noble potential is introduced top electrode.
Embodiment three: present embodiment is described further embodiment one, is milled with the multiple tracks groove on the relative inside surface of top electrode insulating part 5 and bottom electrode insulating part 6.To improve flashover voltage, prevent that flashover from occuring.
Claims (3)
1. transformer oil paper insulation oil flows down the breakdown characteristics test unit, it is characterized in that, it comprises bushing (1), web member under the bushing (2), top electrode web member (3), top electrode (4), top electrode insulating part (5), bottom electrode insulating part (6), insulation blanket stud (7), insulation nut (8), bottom electrode (9), insulating board (10), oil duct (11), earth stud (12), oil-in (13), oil-out (14), oil inlet connecting piece (15) and oil-out web member (16)
Web member under the bushing (2), top electrode web member (3), top electrode (4), top electrode insulating part (5), bottom electrode insulating part (6), insulation blanket stud (7), insulation nut (8), bottom electrode (9), insulating board (10), oil duct (11) and earth stud (12) are arranged in the high-potting casing
Top electrode (4) be arranged on bottom electrode (9) directly over,
Top electrode (4) embeds top electrode insulating part (5) inside, bottom electrode (9) embeds bottom electrode insulating part (6) inside, top electrode insulating part (5) is arranged on bottom electrode insulating part (6) top, insulating board (10) is fixedly clamped by top electrode insulating part (5) and bottom electrode insulating part (6), top electrode insulating part (5) by insulation blanket stud (7) and the insulation nut (8) be fixed with bottom electrode insulating part (6) on, bottom electrode insulating part (6) is fixed on the high-potting casing by oil inlet connecting piece (15) and oil-out web member (16), cavity between top electrode insulating part (5) and the bottom electrode insulating part (6) forms oil duct (11), oil-in (13) and oil-out (14) are communicated with the outside and oil duct (11) of high-potting casing
The lower end of top electrode web member (3) is threaded with top electrode (4), and the upper end of top electrode web member (3) reaches in the web member under the bushing (2),
The high-pressure conductive core is introduced in the high-potting casing by bushing (1), high-pressure conductive core lower end in the bushing (1) reaches in the web member under the bushing (2), and be threaded with web member (2) under the bushing, high-pressure conductive core in the bushing (1) and top electrode (4) electrical connection
Described bottom electrode (9) is fixedly attached to earth stud (12).
2. described transformer oil paper insulation oil flows down the breakdown characteristics test unit according to claim 1, it is characterized in that, adopting movingly between the web member (2) under top electrode web member (3) and the bushing, mode connects.
3. described transformer oil paper insulation oil flows down the breakdown characteristics test unit according to claim 1, it is characterized in that, is milled with the multiple tracks groove on top electrode insulating part (5) inside surface relative with bottom electrode insulating part (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220663065 CN202903958U (en) | 2012-12-05 | 2012-12-05 | An apparatus for testing characteristics of breakdowns under an oil flow of paper oil insulation of a transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220663065 CN202903958U (en) | 2012-12-05 | 2012-12-05 | An apparatus for testing characteristics of breakdowns under an oil flow of paper oil insulation of a transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202903958U true CN202903958U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220663065 Expired - Fee Related CN202903958U (en) | 2012-12-05 | 2012-12-05 | An apparatus for testing characteristics of breakdowns under an oil flow of paper oil insulation of a transformer |
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| Country | Link |
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| CN (1) | CN202903958U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103605057A (en) * | 2013-11-21 | 2014-02-26 | 国家电网公司 | Oil paper insulation breakdown intensity test apparatus and method |
| CN104749499A (en) * | 2015-02-09 | 2015-07-01 | 广东电网有限责任公司电力科学研究院 | Movable testing system for transformer inter-turn insulating electrical aging simulation test |
| CN104133101B (en) * | 2014-07-14 | 2017-01-04 | 西南交通大学 | A kind of test the experimental provision of transformator oil body electric current under different oil Flow Velocity |
| CN106680544A (en) * | 2016-12-22 | 2017-05-17 | 中国西电电气股份有限公司 | Clamping device for accelerated aging test of lightning arrester |
| CN110208669A (en) * | 2019-06-26 | 2019-09-06 | 国网浙江省电力有限公司电力科学研究院 | The device and method of insulation degradation between simulation oil immersed type capacitor panel of current transformer |
-
2012
- 2012-12-05 CN CN 201220663065 patent/CN202903958U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103605057A (en) * | 2013-11-21 | 2014-02-26 | 国家电网公司 | Oil paper insulation breakdown intensity test apparatus and method |
| CN103605057B (en) * | 2013-11-21 | 2016-01-13 | 国家电网公司 | A kind of paper oil insulation disruptive strength experimental provision and method |
| CN104133101B (en) * | 2014-07-14 | 2017-01-04 | 西南交通大学 | A kind of test the experimental provision of transformator oil body electric current under different oil Flow Velocity |
| CN104749499A (en) * | 2015-02-09 | 2015-07-01 | 广东电网有限责任公司电力科学研究院 | Movable testing system for transformer inter-turn insulating electrical aging simulation test |
| CN106680544A (en) * | 2016-12-22 | 2017-05-17 | 中国西电电气股份有限公司 | Clamping device for accelerated aging test of lightning arrester |
| CN106680544B (en) * | 2016-12-22 | 2019-01-25 | 中国西电电气股份有限公司 | Arrester accelerated aging test clamping device |
| CN110208669A (en) * | 2019-06-26 | 2019-09-06 | 国网浙江省电力有限公司电力科学研究院 | The device and method of insulation degradation between simulation oil immersed type capacitor panel of current transformer |
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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: 20130424 Termination date: 20151205 |
|
| EXPY | Termination of patent right or utility model |