CN201681682U - Composite protective gap insulator - Google Patents
Composite protective gap insulator Download PDFInfo
- Publication number
- CN201681682U CN201681682U CN2010201485098U CN201020148509U CN201681682U CN 201681682 U CN201681682 U CN 201681682U CN 2010201485098 U CN2010201485098 U CN 2010201485098U CN 201020148509 U CN201020148509 U CN 201020148509U CN 201681682 U CN201681682 U CN 201681682U
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- gold utensil
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Abstract
The utility model relates to a composite protective gap insulator comprising a horn electrode (1), a composite insulator (2), hardware fittings (3) and a composite post insulator (4), wherein a base of the horn electrode (1) is groove-shaped, and installing holes are arranged on the base; the hardware fittings (3) at the two ends of the composite insulator (2) are of a flat pin structure and are provided with elongated holes which are connected with the base of the horn electrode (1); the base of the electrode can slide on the hardware fittings (3), so that the gap is adjusted easily and accurately; the hardware fittings (3) at two ends are positioned when the composite insulator (2) is processed and are arranged in the same plane with flat pins of the hardware fittings (3); the plane of the base is ensured to be vertical to the plane of the horn electrode when the horn electrode (1) is processed; and a chute of the hardware fittings (3) limits the left and right swing of the horn electrode (1), thereby ensuring the electrode to be aligned. The utility model has the advantages of accurate adjustment of the installation distance of the electrode, high concentricity, quick arc quenching, difficult ablation of the electrode and stable discharging gap.
Description
Technical field
The utility model relates to a kind of at substation transformer neutral point lightning protection device; claim arc horn again; mainly be made up of goat's horn type stainless steel electrode and composite insulator, the protection substation transformer is avoided destroying after being struck by lightning, and belongs to electric power transfer unit manufacturing technology field.
Background technology
110kV～220kV system adopts the effective grounding mode, and promptly system should make the ratio (X of zero sequence and positive sequence reactance under various conditions
0/ X
1) on the occasion of and be not more than 3, and the ratio (R of its zero sequence resistance and positive sequence reactance
0/ X
1) on the occasion of and be not more than 1.In order to limit the single-line to ground fault electric current, prevent the requirements such as the configuration of adjusting of communication interference and relaying protection, in the 110kV-220kV system with effectively earthed neutral, often take the earth-free operational mode of part transformer neutral point.During normal the operation, the neutral point of a transformer is through the direct ground connection of earthing isolator, and the neutral point of all the other transformers is through lightning arrester or protection gap ground connection, perhaps through lightning arrester and protection gap ground connection in parallel.
Existing 110kV, 220kV transformer neutral point are often taked the graded insulation structure, and Protection Mode of Transformer Neutral End has following several, and first kind of gapless metal-oxide lighting arrester is in parallel with an excellent rod gap; Second kind of single rod-rod gap; The metal oxide arrester that the third is single.Lightning arrester selects for use Y1.5W-60/144 and Y1.5W-144/320 type zinc oxide arrester as 110kV and the protection of 220kV transformer neutral point usually.And Φ 12～16 stainless steel bars are generally selected in excellent gap for use; the end is a hemispherical head; distance is generally elected 105～115mm and 255～300mm as 110kV and the protection of 220kV transformer neutral point; the earth terminal string has CT in the gap; extract as zero sequence signal; zero continuous current protection setting time is generally 0.3～0.5s, and primary side current is 50～100A.Whole protecting device and isolating switch parallel connection.
Existing protected mode has been protected the transformer neutral point insulation to a certain extent, but also has some problems.
1, single lightning arrester can be protected the transformer neutral point insulation, but when system's single-phase earthing and lost territory or open-phase operation, lightning arrester is damaged easily or explodes;
2, the protected mode in single excellent gap has good anti-power frequency performance, uses widely in engineering.The rod gap makes transformer neutral point avoid insulation infringement under overvoltage by air breakdown, still be affected by the external environment and the dispersiveness of gap discharge very big.Excellent in addition gap is behind an arcing, and electrode surface has burn; Be subject to the influence of installation level in installation process, it is inaccurate distance adjustment to occur, problems such as concentricity difference.These all can influence the electric property in gap.
Summary of the invention
The purpose of this utility model is to solve following technical problem: 1, solve the electrode mounting distance and adjust and the concentricity problem; 2, solve discharging gap and arcing gap separation problem; 3, blow-out is fast, and electrode is difficult for ablating, and discharging gap is stable.
The technical scheme of taking at above problem: compound protection gap insulation is made up of goat's horn type electrode 1, composite insulator 2, gold utensil 3, composite post insulator 4; Composite insulator 2 is connected with gold utensil 3 by goat's horn type electrode 1, and composite insulator 2 and goat's horn type electrode 1 are positioned at gold utensil 3 and composite post insulator 4 inboards, and gold utensil 3 gold utensil 3 that is connected with composite post insulator 4 is positioned at composite post insulator 4 upper ends.Figure is as follows for its protection philosophy: when electrical network was subjected to lightning impulse, switching impulse or other operation troubless, shock wave can pass to transformer station rapidly in electric power transmission network.At this moment, the voltage endurance capability of compound clearance is lower than the overvoltage in the electrical network, causes gap discharge, has protected converting equipment.Discharge process goat's horn type eletrode tip discharge before this forms electric arc.Then,, cause hot-air to rise, drive the electric arc drift that makes progress, avoid the sustained combustion of goat's horn type eletrode tip, protected the profile of eletrode tip, accurately provide the foundation thereby move for protection next time because air is heated near the gap.
Beneficial effect: the adjustment of electrode mounting distance is accurate, concentricity is high, and blow-out is fast, and electrode is difficult for ablating, and discharging gap is stable.
Description of drawings
The compound protection gap insulation of Fig. 1 the utility model minor structure schematic diagram is by goat's horn type electrode 1, composite insulator 2, gold utensil 3, composite post insulator 4;
Fig. 2 is gold utensil 3 flat leg structure schematic diagrames; Fig. 3 goat's horn type electrode 1 structural representation.
Embodiment
Do following further specifying below in conjunction with diagram with regard to the sub-embodiment of the compound protection gap insulation of the utility model: the compound protection gap insulation of the utility model is made up of goat's horn type electrode 1, composite insulator 2, gold utensil 3, composite post insulator 4; Composite insulator 2 is connected with gold utensil 3 by goat's horn type electrode 1, and composite insulator 2 and goat's horn type electrode 1 are positioned at gold utensil 3 and composite post insulator 4 inboards, and gold utensil 3 gold utensil 3 that is connected with composite post insulator 4 is positioned at composite post insulator 4 upper ends.Goat's horn type electrode 1 its base is a grooved, and installing hole is arranged above.Composite insulator 2 two ends gold utensils 3 are flat leg structure, on elongated pore is arranged, link to each other with goat's horn type electrode 1 base, electrodes base can slide on gold utensil 3, accurately carries out the gap adjustment easily.Composite insulator 23 has been located adding man-hour two ends gold utensil, with gold utensil 3 flat pin in same plane; It is vertical with goat's horn type electrode 1 plane that goat's horn type electrode 1 adds its base plane assurance in man-hour, and gold utensil 3 chutes have limited goat's horn type electrode 1 and swung, thereby have guaranteed that electrode aligns.
1 insulation of composite insulator pillar 4 and 2 pairs of goat's horn types of composite insulator electrode supporting role.
When overvoltage transmitted, the air between the two goat's horn type electrodes 1 was breakdown, formed electric arc.Then,, cause hot-air to rise, drive the electric arc drift that makes progress, avoid the sustained combustion of goat's horn type eletrode tip, protected the profile of eletrode tip, accurately provide the foundation thereby move for protection next time because air is heated near the gap.
Claims (5)
1. compound protection gap insulation is characterized in that being made up of goat's horn type electrode (1), composite insulator (2), gold utensil (3), composite post insulator (4); Composite insulator (2) is connected with gold utensil (3) by goat's horn type electrode (1), composite insulator (2) and goat's horn type electrode (1) are positioned at gold utensil (3) and composite post insulator (4) inboard, and gold utensil (3) gold utensil (3) that is connected with composite post insulator (4) is positioned at composite post insulator (4) upper end.
2. a kind of compound protection gap insulation according to claim 1 is characterized in that its base of goat's horn type electrode (1) is a grooved, and installing hole is arranged above.
3. a kind of compound protection gap insulation according to claim 1; it is characterized in that composite insulator (2) two ends gold utensils (3) are flat leg structure; on elongated pore is arranged, link to each other with goat's horn type electrode (1) base, goat's horn type electrode (1) base can go up slide at gold utensil (3).
4. a kind of compound protection gap insulation according to claim 1 is characterized in that composite insulator (2) locatees adding two ends gold utensil in man-hour (3), with the flat pin of gold utensil (3) in same plane.
5. a kind of compound protection gap insulation according to claim 1, it is vertical with goat's horn type electrode (1) plane to it is characterized in that goat's horn type electrode (1) adds its base plane assurance in man-hour, and gold utensil (3) chute has limited goat's horn type electrode (1) and has swung.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201485098U CN201681682U (en) | 2010-03-26 | 2010-03-26 | Composite protective gap insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201485098U CN201681682U (en) | 2010-03-26 | 2010-03-26 | Composite protective gap insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201681682U true CN201681682U (en) | 2010-12-22 |
Family
ID=43346719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201485098U Expired - Lifetime CN201681682U (en) | 2010-03-26 | 2010-03-26 | Composite protective gap insulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201681682U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751055A (en) * | 2012-07-10 | 2012-10-24 | 辽宁省电力有限公司丹东供电公司 | Discharge gap fitting of 66KV line insulator |
-
2010
- 2010-03-26 CN CN2010201485098U patent/CN201681682U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751055A (en) * | 2012-07-10 | 2012-10-24 | 辽宁省电力有限公司丹东供电公司 | Discharge gap fitting of 66KV line insulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Teng Guoli Inventor after: Wang Yong Inventor after: Hao Kejin Inventor before: Teng Guoli |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: TENG GUOLI TO: TENG GUOLI WANG YONG HAO KEJIN |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101222 |