CN201126460Y - Cable surge voltage test terminal - Google Patents
Cable surge voltage test terminal Download PDFInfo
- Publication number
- CN201126460Y CN201126460Y CNU200720300016XU CN200720300016U CN201126460Y CN 201126460 Y CN201126460 Y CN 201126460Y CN U200720300016X U CNU200720300016X U CN U200720300016XU CN 200720300016 U CN200720300016 U CN 200720300016U CN 201126460 Y CN201126460 Y CN 201126460Y
- Authority
- CN
- China
- Prior art keywords
- cable
- voltage test
- impulse voltage
- test terminal
- semi
- 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
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Abstract
The utility model relates to a cable impulse voltage test terminal composed of a cable, wherein, metal sheaths at two ends of the cable are decorticated, a semi-conductive shielding layer outside a cable insulating layer is held and exposed. The utility model is characterized in that a semiconductor layer composing the cable terminal is additional arranged outside the insulating layer exposed at the two ends of the cable. Because the cable terminal is composed only by the semi-conductive layer equably winded outside the cable insulating layer, the cable impulse voltage test terminal according the utility model has advantages of convenience, safety, reliability, no pollution, and high durable voltage.
Description
Technical field
The utility model belongs to the cable testing field, particularly a kind of twisted polyethylene cable impulse voltage test terminal.
Background technology
The cable impulse voltage test is an important way of XLPE cable electric property examination, traditional impulse voltage test need be adopted special terminal device at the cable two ends, water terminal for example, generally be to utilize insulating cylinder, the even distribution of terminal voltage when using deionized water to guarantee cable testing in the tube.During each the test, and the outer semiconducting layer of terminal inner cable is peelled off in requirement, need carry out the dismounting of sample, need purpose-made device that the equal press liquid in the termination barrel is circulated simultaneously, like this cost plenty of time, workload is big, and operation is many, apparatus expensive, and may pollute waste with material to environment.Simultaneously, the present the highest cable testing terminal of electric pressure, its lightning impulse voltage tolerance value generally is no more than 1900kV, and operating impulse voltage generally is no more than 1400kV, the surge voltage allowance test of not competent cable.Need to carry out the impulse voltage test of high voltage simultaneously, when outside terminal takes place, dodging, will cause the damage of cable testing terminal.
Summary of the invention
The purpose of this utility model provides a kind of special equipment that do not need, only need spend a small amount of artificial and material, simple, with low cost, environmental friendliness easy to make, withstand voltage is high and can not cause the cable impulse voltage test terminal of terminal loss when outer the sudden strain of a muscle taken place, to overcome above-mentioned deficiency.
To achieve these goals, the utility model is made of cable, at first divests cable two ends protective metal shell, keeps and expose the cable insulation out semiconductor layer, is characterized in: outside cable insulation, uniform winding one deck semi-conductive layer constitutes cable termination.
Directly utilize the cable insulation out semiconductor layer or twine one deck semi-conductive layer and all press the formation cable termination at insulating surface.
The protective metal shell of cable termination and oversheath incision position are wound with one deck para tape to the end.
Because the utility model is uniform winding one deck semi-conductive layer formation cable termination outside cable insulation just, makes that the utility model is an impulse voltage test terminal convenient, safe and reliable, pollution-free, that withstand voltage is high.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the utility model impulse voltage test Application Example schematic block diagram.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
The utility model is to have outside cable insulation 1, and the semi-conductive layer 2 (Fig. 1) of uniform winding certain-length, semi-conductive layer 2 can be the insulation screens that directly utilizes cable test product itself, also can be the semi-conductive layer that manually is entwined with semiconductive material.Need in use to select different semi-conductive layer 2 length 3 according to the different characteristic of trial voltage and cable test product, the cable different characteristic comprises the different structure and different insulating material, the electric characteristic of semi-conductive layer 2 materials of cable; Cable semi-conductive terminal length 3 is meant the length from protective metal shell and oversheath 4 incision positions 5 to the cable end semi-conductive layer, and improving the mode that the outer lightning of this terminal presses can twine one deck para tape to the end at the protective metal shell and oversheath fracture 5 places of cable.
Embodiment 1:
The lightning impulse voltage test of YJLW03127/2201 * 400 type power cables, at first divest the long protective metal shell of two ends 11.0m, keep also and expose the insulation shield layer, utilize insulator attached cable two ends then, carry out lightning impulse voltage test after connecting test circuit.This cable termination does not dodge outside 2340kV takes place.
Embodiment 2:
YJLW03 2,90/,500 1 * 2500 type power cables, insulation shielding wrecks, and need carry out impulse voltage test.Divest oversheath and the protective metal shell of 4.0m earlier, expose insulation shielding, utilize semiconductive material to recover the screen layer of the insulation wreck then, the length of final test terminal is 9.4m, carry out impulse voltage test, successively carry out the operating impulse voltage test of lightning impulse voltage test and the 1240kV of 1675kV, waveform is good.
Application Example:
When the utility model is carried out impulse voltage test, impulse voltage generator (1) produces surge voltage, be connected respectively on voltage divider (2) and cable (terminal) test product (3) by high-voltage connection (5), thereby cable test product (3) is carried out impulse voltage test.
The content that is not described in detail in this instructions belongs to this area professional and technical personnel's known prior art.
Claims (3)
1, a kind of cable impulse voltage test terminal, constitute by cable, at first divest cable two ends oversheath and protective metal shell, keep and expose the insulation shield layer, it is characterized in that: outside exposing cable two ends insulation course, also be provided with one deck semi-conductive layer and constitute cable termination.
2, cable impulse voltage test terminal as claimed in claim 1 is characterized in that: semi-conductive layer is directly to utilize the cable insulation out semiconductor layer or twine one deck semi-conductive layer at surface of insulating layer all to press the formation cable termination.
3, cable impulse voltage test terminal as claimed in claim 1, it is characterized in that: the protective metal shell of cable termination and oversheath incision position are wound with one deck certain-length para tape to the end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720300016XU CN201126460Y (en) | 2007-12-17 | 2007-12-17 | Cable surge voltage test terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720300016XU CN201126460Y (en) | 2007-12-17 | 2007-12-17 | Cable surge voltage test terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201126460Y true CN201126460Y (en) | 2008-10-01 |
Family
ID=39999928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720300016XU Expired - Lifetime CN201126460Y (en) | 2007-12-17 | 2007-12-17 | Cable surge voltage test terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201126460Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692589A (en) * | 2012-06-15 | 2012-09-26 | 甘肃省电力公司刘家峡水电厂 | Medium-voltage crosslinked polyethylene cable terminal unshaded corona test method |
| CN106771896A (en) * | 2016-11-25 | 2017-05-31 | 浙江舟山海洋输电研究院有限公司 | Sea electric power cable overvoltage and its checking system and verification method of protection test |
| CN109100621A (en) * | 2018-06-21 | 2018-12-28 | 南方电网科学研究院有限责任公司 | Burn analog detection method and its structure between cable outer semiconducting layer and aluminium sheath |
-
2007
- 2007-12-17 CN CNU200720300016XU patent/CN201126460Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692589A (en) * | 2012-06-15 | 2012-09-26 | 甘肃省电力公司刘家峡水电厂 | Medium-voltage crosslinked polyethylene cable terminal unshaded corona test method |
| CN102692589B (en) * | 2012-06-15 | 2015-03-25 | 甘肃省电力公司刘家峡水电厂 | Medium-voltage crosslinked polyethylene cable terminal unshaded corona test method |
| CN106771896A (en) * | 2016-11-25 | 2017-05-31 | 浙江舟山海洋输电研究院有限公司 | Sea electric power cable overvoltage and its checking system and verification method of protection test |
| CN109100621A (en) * | 2018-06-21 | 2018-12-28 | 南方电网科学研究院有限责任公司 | Burn analog detection method and its structure between cable outer semiconducting layer and aluminium sheath |
| CN109100621B (en) * | 2018-06-21 | 2021-02-26 | 南方电网科学研究院有限责任公司 | Burn simulation test method and structure between outer semi-conducting layer of cable and aluminum sheath |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE NETWORK ELECTRIC POWER RESEARCH INSTITUTE Free format text: FORMER OWNER: WUHAN HIGH VOLTAGE RESEARCH INSTITUTE OF STATE GRID Effective date: 20090904 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090904 Address after: Nanjing City, Jiangsu Province, Nan Shui Road No. 8, zip code: 210003 Co-patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Patentee after: Power Science Research Institute of national network Address before: Hubei province Wuhan city Hongshan District Luoyu road 143, zip code: 430074 Patentee before: Guowang Wuhan High Voltage Inst |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160630 Address after: 430074 Hubei city of Wuhan province Wuchang Luo Yu Road, No. 143 Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Address before: Nanjing City, Jiangsu Province, 210003 South Shui Road No. 8 Patentee before: State Grid Electric Power Research Insititute Patentee before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute |
|
| CX01 | Expiry of patent term |
Granted publication date: 20081001 |
|
| CX01 | Expiry of patent term |