CN203858329U - Stress ring for partial discharge tests and high-voltage insulation tests on 35kV or lower power cable - Google Patents
Stress ring for partial discharge tests and high-voltage insulation tests on 35kV or lower power cable Download PDFInfo
- Publication number
- CN203858329U CN203858329U CN201420159854.XU CN201420159854U CN203858329U CN 203858329 U CN203858329 U CN 203858329U CN 201420159854 U CN201420159854 U CN 201420159854U CN 203858329 U CN203858329 U CN 203858329U
- Authority
- CN
- China
- Prior art keywords
- power cable
- stress ring
- tests
- cable
- test
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000009413 insulation Methods 0.000 title abstract description 8
- 239000000463 material Substances 0.000 abstract description 3
- 230000015556 catabolic process Effects 0.000 abstract 2
- 229920003020 cross-linked polyethylene Polymers 0.000 abstract 2
- 239000004703 cross-linked polyethylene Substances 0.000 abstract 2
- 239000012212 insulator Substances 0.000 abstract 1
- 239000004698 Polyethylene Substances 0.000 description 9
- -1 polyethylene Polymers 0.000 description 9
- 229920000573 polyethylene Polymers 0.000 description 9
- 210000004907 gland Anatomy 0.000 description 7
- 239000004020 conductor Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012428 routine sampling Methods 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The utility model relates to a stress ring for partial discharge tests and high-voltage insulation tests on a 35kV or lower power cable, which is characterized in that three screws on the stress ring enable the stress ring to be fixed to a cable shielding layer; the stress ring is a hollow cylindrical body with the outer diameter being 20-110mm, the height of the stress ring is 30-220mm, and an outer opening of the lower end of the stress ring is a semicircle with the radius R being 0.8-6.0mm. A test terminal is enabled to be installed conveniently and rapidly, material consumption is low, and the stress ring is durable in use. The field intensity of end parts of the 35kV or lower crosslinked polyethylene power cable or other 35kV or lower shielded power cables is centralized under the action of high voltage (with the highest reaching 91kV), and end breakdown easily occurs; and especially, discharge easily occurs between an insulator of a cable core of the crosslinked polyethylene power cable and an outer shield of the power cable, thereby influencing the tests or flashover or breakdown or the like.
Description
Technical field
The utility model relates to power cable detection device, particularly a kind of 35kV and following power cable shelf depreciation is tested, voltage-withstand test stress loop.
Background technology
According to cross-inked polyethylene power cable, power cable international standard and national standard requirement, cables manufacturing business and electric wire testing agency are to cross-inked polyethylene power cable, power cable dispatch from the factory routine test or sampling test, all will carry out voltage-withstand test, cross-inked polyethylene power cable also will carry out shelf depreciation test.
35kV and the test of following cross-inked polyethylene power cable shelf depreciation, 35kV and following other band shielding power cables are under high voltage (being up to 91kV) effect, cable end field intensity is concentrated, end easily occurs to be punctured, especially easily electric discharge between the insulation of cross-inked polyethylene power cable core and external shield, thus test or flashover affected, puncture etc.
Utility model content
The purpose of this utility model is to provide the test of 35kV and following power cable shelf depreciation, voltage-withstand test stress loop, it mainly solves the existing technical matters of above-mentioned prior art, it makes, and test terminal is easy for installation, quick, material consumption is few, and durable in use.35kV and the test of following cross-inked polyethylene power cable shelf depreciation, 35kV and following other band shielding power cables are under high voltage (being up to 91kV) effect, cable end field intensity is concentrated, end easily occurs to be punctured, especially easily electric discharge between the insulation of cross-inked polyethylene power cable core and external shield, thus test or flashover affected, puncture etc.
For solving the problems of the technologies described above, the utility model is achieved in that
A kind of 35kV and the test of following power cable shelf depreciation, voltage-withstand test stress loop, is characterized in that: three screws in described stress loop are fixed on cable shield it; The hollow cylinder of described stress loop external diameter 20-110mm, the height of described stress loop is 30-220mm, it is the semi arch of 0.8-6.0mm that the collar extension of lower end has R.
The utility model is compared with existing conventional art, and tool has the following advantages: make that test terminal is easy for installation, quick, material consumption is few, and durable in use, evenly local field strength.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation that uses 35KV of the present utility model and following cross-inked polyethylene power cable shelf depreciation test terminal.
Embodiment
Refer to Fig. 1, the utility model discloses a kind of 35kV and the test of following power cable shelf depreciation, voltage-withstand test stress loop.As shown in the figure: three screws 2 in described stress loop 1 are fixed on cable shield 8 it; The hollow cylinder of described stress loop 1 external diameter 20-110mm, the height of described stress loop 1 is 30-220mm, it is the semi arch 3 of 0.8-6.0mm that the collar extension of lower end has R.
Below in conjunction with Fig. 2, the use for the utility model in 35KV and following cross-inked polyethylene power cable shelf depreciation test terminal, is described in further details the utility model.As shown in the figure: it comprises stress loop 1, all gland 10, high pressure connect grading ring 7, has and can make it be fixed on the screw 2 on cable shield 8 in described stress loop 1; The lower end of described stress loop 1 is enclosed within the interface of cable shield and insulation, and described equal gland 10 is enclosed within on cable insulation core 9, and all the semiconduction interface of gland 10 is connected with stress loop 1 lower end, all on gland 10, has 5-16 full skirt 11; Described high pressure connects the core conductor 5 of the upper end stube cable insulated wire cores 9 of grading ring 7, and the center that described high pressure connects grading ring 7 is fixed on the core conductor 5 of cable insulation core 9 with built-in screw.The lower end that high pressure connects grading ring 7 has high pressure connection 6 to be connected with hi-line.
As preferably, it be the torus of diameter 120-400mm that described high pressure connects grading ring 7, and guarantee contacts the generation of avoiding high pressure bloom phenomenon good time with cable core.
As preferably, the center that described high pressure connects grading ring 7 is fixed on the core conductor of cable insulation core 9 with built-in screw.
As preferably, three screws 2 in described stress loop 1 are fixed on cable shield it; The hollow cylinder of described stress loop 1 external diameter 20-110mm, the height of described stress loop 1 is 30-220mm, it is the semi arch 3 of 0.8-6.0mm that the collar extension of lower end has R.
As preferably, described equal gland 10 is the cone-shaped bodys with full skirt 11
As preferably, the height of described equal gland 10 is 0.45-1.00m, so both can meet testing requirements, can reduce again the stripping length at test cable two ends.
As preferably, the upper terminal inner lining silicon rubber semiconductor layer of described equal gland 10 is connected with stress loop 1 lower end, its compact conformation.
Be only preferred embodiment of the present utility model in sum, be not used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modify, all should be technology category of the present utility model.
Claims (1)
1. 35kV and the test of following power cable shelf depreciation, a voltage-withstand test stress loop, is characterized in that: three screws (2) in described stress loop (1) are fixed on cable shield it; The hollow cylinder of described stress loop (1) external diameter 20-110mm, the height of described stress loop (1) is 30-220mm, it is the semi arch (3) of 0.8-6.0mm that the collar extension of lower end has R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420159854.XU CN203858329U (en) | 2014-04-02 | 2014-04-02 | Stress ring for partial discharge tests and high-voltage insulation tests on 35kV or lower power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420159854.XU CN203858329U (en) | 2014-04-02 | 2014-04-02 | Stress ring for partial discharge tests and high-voltage insulation tests on 35kV or lower power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203858329U true CN203858329U (en) | 2014-10-01 |
Family
ID=51608175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420159854.XU Expired - Lifetime CN203858329U (en) | 2014-04-02 | 2014-04-02 | Stress ring for partial discharge tests and high-voltage insulation tests on 35kV or lower power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203858329U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653243A (en) * | 2016-11-21 | 2017-05-10 | 云南电网有限责任公司电力科学研究院 | Voltage-sharing sleeve assembly |
| CN108711820A (en) * | 2018-05-28 | 2018-10-26 | 云南电网有限责任公司昆明供电局 | A kind of plug-in Oil-filled Cable End and its application without shelf depreciation |
-
2014
- 2014-04-02 CN CN201420159854.XU patent/CN203858329U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653243A (en) * | 2016-11-21 | 2017-05-10 | 云南电网有限责任公司电力科学研究院 | Voltage-sharing sleeve assembly |
| CN106653243B (en) * | 2016-11-21 | 2018-03-06 | 云南电网有限责任公司电力科学研究院 | A kind of gland component |
| CN108711820A (en) * | 2018-05-28 | 2018-10-26 | 云南电网有限责任公司昆明供电局 | A kind of plug-in Oil-filled Cable End and its application without shelf depreciation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141001 |