CN103869104A - Stress ring for partial discharge tests and high-voltage insulation tests on power cable of 10 kV or lower - Google Patents
Stress ring for partial discharge tests and high-voltage insulation tests on power cable of 10 kV or lower Download PDFInfo
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- CN103869104A CN103869104A CN201410130677.7A CN201410130677A CN103869104A CN 103869104 A CN103869104 A CN 103869104A CN 201410130677 A CN201410130677 A CN 201410130677A CN 103869104 A CN103869104 A CN 103869104A
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Abstract
The invention relates to a stress ring for partial discharge tests and high-voltage insulation tests on a power cable of 10 kV or lower. The stress ring is a metal cylindrical hollow body. The stress ring is fixed to a cable shielding layer through screws on the stress ring. The stress ring is the cylindrical hollow body with the outer diameter of 10 mm to 100 mm. An outer opening of the lower end of the stress ring is a semicircle with the diameter R of 0.5 mm to 3 mm. The height of the stress ring ranges from 30 mm to 180 mm. Due to the stress ring, a test terminal can be conveniently and rapidly installed, material consumption is low, and the stress ring is durable in use. The field intensity of the ends of the crosslinked polyethylene power cable of 10 kV or lower or other shielded power cables of 10 kV or lower is concentric under the high voltage action, and end breakdown easily occurs; 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, and therefore the tests or flashover or breakdown or the like is influenced.
Description
Technical field
The present invention relates to power cable detection device, particularly a kind of 10kV and the test of following power cable shelf depreciation, 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.
10kV and the test of following cross-inked polyethylene power cable shelf depreciation, 10kV and following other band shielding power cables are under high voltage (being up to 30.5kV) 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.
Summary of the invention
The object of the present invention is to provide a kind of 10kV and the test of 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.10kV and the test of following cross-inked polyethylene power cable shelf depreciation, 10kV and following other band shielding power cables are under high voltage (being up to 30.5kV) 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 present invention is achieved in that
A kind of 10kV and the test of following power cable shelf depreciation, voltage-withstand test stress loop, is characterized in that: the screw in described stress loop is fixed on cable shield it; Described stress loop is the hollow cylinder of external diameter 10-100mm, and the height of described stress loop is 30-180mm, and it is the semi arch of 0.5-3mm that the collar extension of lower end has R.
The present invention 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 invention.
Fig. 2 is sectional view of the present invention.
Fig. 3 is the structural representation that uses 10KV of the present invention and following cross-inked polyethylene power cable shelf depreciation test terminal.
Embodiment
Refer to Fig. 1,2, the invention discloses a kind of 10kV and the test of following power cable shelf depreciation, voltage-withstand test stress loop.As shown in the figure: the screw 2 in described stress loop 1 is fixed on cable shield 5 it; Described stress loop 1 is the hollow cylinder of external diameter 10-100mm, and the height of described stress loop 1 is 30-180mm, and it is the semi arch 3 of 0.5-3mm that the collar extension of lower end has R.
Below in conjunction with Fig. 3, the use for the present invention in 10KV and following cross-inked polyethylene power cable shelf depreciation test terminal, is described in further details the present invention.As shown in the figure: it comprises stress loop 1, all gland 9, high pressure connect grading ring 10, has and can make it be fixed on the screw 2 on cable shield 5 in described stress loop 1; Described stress loop 1 is enclosed within the interface of cable shield and insulation, and described equal gland 9 is enclosed within on cable insulation core 6, and all the semiconduction interface of gland 9 is connected with stress loop 1 lower end, all on gland 9, has 2-4 full skirt 8; Described high pressure connects grading ring 10 and is positioned at equal gland 9 belows, and high pressure connects the core conductor of the upper end stube cable insulated wire cores 6 of grading ring 10, and the lower end that high pressure connects grading ring 10 has high pressure connection 7 to be connected with hi-line.
As preferably, it be the torus of diameter 25-360mm that described high pressure connects grading ring 10, and guarantee contacts the generation of avoiding high pressure bloom phenomenon good time with cable core.
As preferably, described high pressure connects grading ring 10 center and is fixed on the core conductor of cable insulation core 6 with built-in screw.
As preferably, the screw 2 in described stress loop 1 is fixed on cable shield it; The hollow cylinder of described stress loop 1 external diameter 10-100mm, the height of described stress loop 1 is 30-180mm, it is the semi arch 3 of 0.5-3mm that the collar extension of lower end has R.
As preferably, described equal gland 9 is the cone-shaped bodys with full skirt 8.。
As preferably, the height of described equal gland 9 is 0.15-0.35m, 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 9 is connected with stress loop 1 lower end, its compact conformation.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application the scope of the claims change and modify, all should be technology category of the present invention.
Claims (1)
1. 10kV and the test of following power cable shelf depreciation, a voltage-withstand test stress loop, is characterized in that: the screw (2) in described stress loop (1) is fixed on cable shield (5) it; Described stress loop (1) is the hollow cylinder of external diameter 10-100mm, and the height of described stress loop (1) is 30-180mm, and it is the semi arch (3) of 0.5-3mm that the collar extension of lower end has R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130677.7A CN103869104A (en) | 2014-04-02 | 2014-04-02 | Stress ring for partial discharge tests and high-voltage insulation tests on power cable of 10 kV or lower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130677.7A CN103869104A (en) | 2014-04-02 | 2014-04-02 | Stress ring for partial discharge tests and high-voltage insulation tests on power cable of 10 kV or lower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103869104A true CN103869104A (en) | 2014-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410130677.7A Pending CN103869104A (en) | 2014-04-02 | 2014-04-02 | Stress ring for partial discharge tests and high-voltage insulation tests on power cable of 10 kV or lower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103869104A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN203166451U (en) * | 2013-04-07 | 2013-08-28 | 国家电网公司 | An anti-breakdown high-voltage cable head |
| CN203352122U (en) * | 2013-05-06 | 2013-12-18 | 泰科电子(上海)有限公司 | Cold shrink type terminal assembly |
| CN203367959U (en) * | 2013-07-04 | 2013-12-25 | 国家电网公司 | A cable intermediate connector |
| EP2693223A1 (en) * | 2012-08-03 | 2014-02-05 | ABB Technology AG | Voltage measurement device with an insulating body |
| CN203465388U (en) * | 2013-09-26 | 2014-03-05 | 山东希波电气科技股份有限公司 | 35kV suspension type test terminal |
| CN203858261U (en) * | 2014-04-02 | 2014-10-01 | 上海华普电缆有限公司 | Stress ring for partial discharge tests and high-voltage insulation tests on 10kV or lower power cable |
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2014
- 2014-04-02 CN CN201410130677.7A patent/CN103869104A/en active Pending
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060080831A1 (en) * | 2004-10-14 | 2006-04-20 | Nguyen Nga K | Method of delivering geometric stress relief element to high voltage cable terminations |
| CN201369541Y (en) * | 2009-03-18 | 2009-12-23 | 深圳市深博新材料股份有限公司 | Outdoor connecting terminal of shrinking type high-tension cables |
| CN201438634U (en) * | 2009-06-11 | 2010-04-14 | 深圳市长园集团股份有限公司 | Two-layer coextrusion thermal contraction composited tube used for cable termination and cable termination |
| CN101609102A (en) * | 2009-07-13 | 2009-12-23 | 上海三原电缆附件有限公司 | Mesolow crosslinked cable industrial frequency withstand voltage, local discharge test terminal structure |
| JP2011259558A (en) * | 2010-06-07 | 2011-12-22 | Swcc Showa Cable Systems Co Ltd | Cable terminal connection portion |
| CN101923140A (en) * | 2010-09-07 | 2010-12-22 | 北京必成达电缆附件有限公司 | Withstand test device of sleeve of looped network cabinet equipment |
| CN102347598A (en) * | 2011-08-23 | 2012-02-08 | 上海永锦电气集团有限公司 | Cable terminal with stress pipe |
| CN202550464U (en) * | 2012-03-31 | 2012-11-21 | 安徽省浩辉电力技术有限公司 | Pre-expanded cold-shrinkable cable terminal |
| CN102761094A (en) * | 2012-07-24 | 2012-10-31 | 江苏华侃核电器材科技有限公司 | Integral heat shrinkable cable middle connector |
| EP2693223A1 (en) * | 2012-08-03 | 2014-02-05 | ABB Technology AG | Voltage measurement device with an insulating body |
| CN102969581A (en) * | 2012-11-30 | 2013-03-13 | 芜湖科伟兆伏电子有限公司 | High-voltage coaxial cable connector and manufacturing method thereof |
| CN203166451U (en) * | 2013-04-07 | 2013-08-28 | 国家电网公司 | An anti-breakdown high-voltage cable head |
| CN203352122U (en) * | 2013-05-06 | 2013-12-18 | 泰科电子(上海)有限公司 | Cold shrink type terminal assembly |
| CN203367959U (en) * | 2013-07-04 | 2013-12-25 | 国家电网公司 | A cable intermediate connector |
| CN203465388U (en) * | 2013-09-26 | 2014-03-05 | 山东希波电气科技股份有限公司 | 35kV suspension type test terminal |
| CN203858261U (en) * | 2014-04-02 | 2014-10-01 | 上海华普电缆有限公司 | Stress ring for partial discharge tests and high-voltage insulation tests on 10kV or lower power cable |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Application publication date: 20140618 |
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| RJ01 | Rejection of invention patent application after publication |