CN204315317U - Be exclusively used in the parallel connection gaps of 220kV composite insulator - Google Patents
Be exclusively used in the parallel connection gaps of 220kV composite insulator Download PDFInfo
- Publication number
- CN204315317U CN204315317U CN201420734208.1U CN201420734208U CN204315317U CN 204315317 U CN204315317 U CN 204315317U CN 201420734208 U CN201420734208 U CN 201420734208U CN 204315317 U CN204315317 U CN 204315317U
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- China
- Prior art keywords
- arcing horn
- composite insulator
- parallel connection
- connection gaps
- exclusively used
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Abstract
The utility model discloses a kind of parallel connection gaps being exclusively used in 220kV composite insulator, comprise: upper arcing horn and lower arcing horn, described upper arcing horn and lower arcing horn are parallel to the two ends of described composite insulator respectively, XC is 450mm, XP is 530mm, YC is 100-300mm, YP is 50-150mm, and the two ends of described lower arcing horn are ball-shaped end.Compared with prior art, the utility model devises a kind of parallel connection gaps that can be applicable to 220KV composite insulator of brand new, and what ensure that 220KV composite insulator is not subject to lightning damage, improves the reliability of mains supply, reduces operating cost.
Description
Technical field
The utility model belongs to composite insulator technical field, particularly relates to a kind of parallel connection gaps being exclusively used in 220kV composite insulator.
Background technology
China's ac high-voltage in recent years, superhigh pressure aerial power transmission line fault statistics data show, lightning fault accounts for about 70% of circuit total failare, and thunder and lightning is by insulator arc-over, and electric arc calcination insulator, becomes permanent fault.The replacing insulator that has a power failure makes the reliability of mains supply reduce, and too increases operating cost.
The existing lightning protection measures of current overhead transmission line has: erection lightning conducter, reduction pole tower ground resistance, reinforced insulation, installation Transmission Line Arrestor etc.; the core concept of these Lighting Protection Measures improves the lightning withstand level of circuit as much as possible, reduces tripping rate with lightning strike.These lightning protection measuress can be summarized as " blocking type " lightning protection mode.Also have a kind of " diverting type " Lighting Protection Measures---" lightning protection of insulator parallel connection gaps "; its effect is the metal electrode electric discharge that thunder and lightning passes through to be connected in parallel on insulator two ends; thus protection insulator is injury-free; the action of thunder discharge transient protection; switch trip line outage; after thunder and lightning, switch automatic reclosing, circuit resumes operation.
But above-mentioned " lightning protection of insulator parallel connection gaps " technical standard is not also determined, producer wants to produce, and needs to research and develop correlation technique voluntarily.
Summary of the invention
The purpose of this utility model is to provide a kind of parallel connection gaps being exclusively used in 220kV composite insulator, with the user demand of the need of production and user that meet producer.
In order to realize the purpose of this utility model, the utility model provides a kind of parallel connection gaps being exclusively used in 220kV composite insulator, comprise: upper arcing horn and lower arcing horn, described upper arcing horn and lower arcing horn are parallel to the two ends of described composite insulator respectively, XC is 450mm, XP be 530mm, YC is 100-300mm, YP is 50-150mm, and the two ends of described lower arcing horn are ball-shaped end.
The utility model, compared with prior art, devises a kind of parallel connection gaps that can be applicable to 220kV composite insulator of brand new, and what ensure that 220kV composite insulator is not subject to lightning damage, improves the reliability of mains supply, reduces operating cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure, the upper arcing horn of 1-, arcing horn under 2-, 3-ball-shaped end, 4-upper arcing horn first turning, 5-upper arcing horn second turning, arcing horn turning under 6-, the upper arcing horn end of XC-is to the distance of composite insulator string center line, the upper arcing horn end of XP-to the distance of composite insulator string center line, the height of YC-upper arcing horn short circuit composite insulator string, the height of arcing horn short circuit composite insulator string under YP-, Z0-closes the length of insulator string, the beeline of Z-parallel connection gaps.
Embodiment
In order to make the purpose of this utility model, technical scheme and beneficial effect clearly understand, below in conjunction with embodiment, the utility model is further elaborated.Should be understood to specific embodiment described herein only in order to explain the utility model, be not limited to protection range of the present utility model.
As shown in Figure 1, the utility model provides a kind of parallel connection gaps being exclusively used in 220kV composite insulator, comprise: upper arcing horn and lower arcing horn, described upper arcing horn and lower arcing horn are parallel to the two ends of described composite insulator respectively, XC is 450mm, XP be 530mm, YC is 100-300mm, YP is 50-150mm, and the two ends of described lower arcing horn are ball-shaped end.
In a preferred embodiment, the diameter of described ball-shaped end is 50mm.
In a preferred embodiment, described upper arcing horn is provided with arcing horn first turning and upper arcing horn second turning, described lower arcing horn is provided with lower arcing horn turning, described upper arcing horn first turning is 130 °, described upper arcing horn second turning is 142 °, and described lower arcing horn turning is 162 °.
The lightning protection principle of insulator parallel connection gaps is: the pair of metal electrodes (also known as arcing horn/arc leading angle) in parallel at insulator string two ends, form portable protective gaps, the string that portable protective gaps distance is less than insulator string is long.When overhead transmission line is struck by lightning, because the lightning impulse flashover voltage of portable protective gaps is lower than the discharge voltage of insulator string, therefore first portable protective gaps discharges.The power frequency arc continued is under electric power and thermal stress effect, and the discharge channel formed by parallel connection gaps, causes arcing horn end, thus protection insulator avoids electric arc calcination.
As shown in Figure 1, XC, XP are the distance of upper and lower arcing horn end to insulator string center line.Z0 is the length of insulator string, and Z is the beeline of parallel connection gaps, because Z is less than Z0, when overhead transmission line is struck by lightning, parallel connection gaps is first breakdown at beeline place, and namely the lightning impulse flashover voltage of parallel connection gaps is determined by Z.Z＝Z0－(YC+YP)。Namely YC, YP are the height of upper and lower arcing horn difference short circuit insulator string.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (3)
1. one kind is exclusively used in the parallel connection gaps of 220kV composite insulator, it is characterized in that, comprise: upper arcing horn and lower arcing horn, described upper arcing horn and lower arcing horn are parallel to the two ends of described composite insulator respectively, XC is 450mm, XP be 530mm, YC is 100-300mm, YP is 50-150mm, and the two ends of described lower arcing horn are ball-shaped end.
2. the parallel connection gaps being exclusively used in 220kV composite insulator according to claim 1, is characterized in that, the diameter of described ball-shaped end is 50mm.
3. the parallel connection gaps being exclusively used in 220kV composite insulator according to claim 1, it is characterized in that, described upper arcing horn is provided with arcing horn first turning and upper arcing horn second turning, described lower arcing horn is provided with lower arcing horn turning, described upper arcing horn first turning is 130 °, described upper arcing horn second turning is 142 °, and described lower arcing horn turning is 162 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420734208.1U CN204315317U (en) | 2014-11-28 | 2014-11-28 | Be exclusively used in the parallel connection gaps of 220kV composite insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420734208.1U CN204315317U (en) | 2014-11-28 | 2014-11-28 | Be exclusively used in the parallel connection gaps of 220kV composite insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204315317U true CN204315317U (en) | 2015-05-06 |
Family
ID=53137620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420734208.1U Expired - Fee Related CN204315317U (en) | 2014-11-28 | 2014-11-28 | Be exclusively used in the parallel connection gaps of 220kV composite insulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204315317U (en) |
-
2014
- 2014-11-28 CN CN201420734208.1U patent/CN204315317U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150506 Termination date: 20181128 |