CN106841953B - For measuring the cable accessory partial discharge test terminal of Embedded defect - Google Patents
For measuring the cable accessory partial discharge test terminal of Embedded defect Download PDFInfo
- Publication number
- CN106841953B CN106841953B CN201710198584.1A CN201710198584A CN106841953B CN 106841953 B CN106841953 B CN 106841953B CN 201710198584 A CN201710198584 A CN 201710198584A CN 106841953 B CN106841953 B CN 106841953B
- Authority
- CN
- China
- Prior art keywords
- lubricating cup
- epoxy resin
- organic glass
- cable
- cable body
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 230000007547 defect Effects 0.000 title claims abstract description 20
- 230000001050 lubricating effect Effects 0.000 claims abstract description 45
- 239000011521 glass Substances 0.000 claims abstract description 34
- 229910052751 metal Inorganic materials 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 34
- 239000003822 epoxy resin Substances 0.000 claims abstract description 31
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000010949 copper Substances 0.000 claims abstract description 28
- 229910052802 copper Inorganic materials 0.000 claims abstract description 28
- 239000012212 insulator Substances 0.000 claims abstract description 10
- 239000011241 protective layer Substances 0.000 claims abstract description 10
- 229920002545 silicone oil Polymers 0.000 claims abstract description 5
- 239000010410 layer Substances 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 abstract description 3
- 239000011347 resin Substances 0.000 abstract description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 13
- 101150038956 cup-4 gene Proteins 0.000 description 7
- 238000009413 insulation Methods 0.000 description 7
- 229920003020 cross-linked polyethylene Polymers 0.000 description 3
- 239000004703 cross-linked polyethylene Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The present invention discloses a kind of for measuring the cable accessory partial discharge test terminal of Embedded defect, and cable body includes the protective layer of core and package core, and the core upper end of cable body is fixedly connected with copper lug, and copper lug is connected with high-voltage connection；The bottom of metal bottom organic glass lubricating cup is made of metal；Bottom is equipped with organic glass wall of cup；Silicone oil is housed in metal bottom organic glass lubricating cup；On the bottom setting epoxy resin cushion block of metal bottom organic glass lubricating cup, epoxy resin cushion block is fixed on insulator foot, and the side resin that insulator foot is located at epoxy resin cushion block is fixed with epoxy resin support bar；Cable body is fixed on epoxy resin support bar by two copper clips, and the lower end of cable body is protruded into metal bottom organic glass lubricating cup, the metal bottom of end in contact metal bottom organic glass lubricating cup under the core of cable body.The invention patent effectively avoids the problem of shelf depreciation that cable testing terminal may occur, and the accuracy of test has been effectively ensured.
Description
Technical field
It is the present invention relates to high voltage and insulation technology field, in particular to a kind of for measuring the cable accessory of Embedded defect
Partial discharge test terminal.
Background technique
Crosslinked polyethylene (XLPE) insulated cable obtains in the development process of urban distribution network because of its excellent electric property
It is widely applied.The characteristic for studying XLPE cable insulation defect has important meaning to city electric energy and power supply reliability is improved
Justice.
Shelf depreciation is likely to occur in any power equipment due to electric discharge phenomena that electric stress is excessively high.Since electric discharge is sent out
It is raw to generate lasting electric current in fraction region, therefore referred to as shelf depreciation.It can by dielectric around not
It is disconnected to corrode, eventually lead to the collapse of entire insulation system, be the main reason for causing insulation degradation and insulation degradation it is important
Sign and the form of expression.The letter of high-frequency impulse caused by fault location shelf depreciation is searched when test by a detection impedance
Number, and keep its duration short enough to guarantee required pulse resolution.
Therefore when measuring the shelf depreciation at Embedded defect, the pulse signal that detection impedance seizes must be by prefabricated
Defect generates, and otherwise influences whether the accuracy of test result.
Summary of the invention
The purpose of the present invention is to provide a kind of for measuring the cable accessory partial discharge test terminal of Embedded defect, examines
Consider when measuring shelf depreciation, the issuable shelf depreciation of cable termination rest part is to measurement Embedded defect shelf depreciation
Clamping device and easy reusable test terminal are combined as a whole, to solve above-mentioned skill by the influence of test result
Art problem.
In order to achieve the above object, the present invention adopts the following technical scheme:
For measuring the cable accessory partial discharge test terminal of Embedded defect, including the organic glass of cable body, metal bottom
Glass lubricating cup, epoxy resin cushion block, insulator foot, epoxy resin support bar and lubricating cup bottom connector；Cable body includes core and packet
The protective layer of core is wrapped up in, the core upper end of cable body is fixedly connected with copper lug, and copper lug is connected with high-voltage connection；Cable sheet
The core end portion of body is exposed outside protective layer；The bottom of metal bottom organic glass lubricating cup is made of metal；It is set on bottom
There are lubricating cup bottom connector and organic glass wall of cup, organic glass wall of cup is by lubricating cup bottom connector around wherein；Metal bottom organic glass
Silicone oil is housed in lubricating cup；Lubricating cup bottom connector is located at the bottom of metal bottom organic glass lubricating cup；The bottom of metal bottom organic glass lubricating cup
Portion is arranged on epoxy resin cushion block, and epoxy resin cushion block is fixed on insulator foot, and insulator foot is located at epoxy resin cushion block
Side resin is fixed with epoxy resin support bar；Cable body is fixed on epoxy resin support bar by copper clip, cable
The lower end of ontology is protruded into metal bottom organic glass lubricating cup, and the core lower end of cable body is fixed by pedestal connector, and and pedestal
Good contact.
Further, protective layer successively includes interior semi-conductive layer, crosslinked polyetylene insulated layer, outer semiconductive from the inside to the outside
Layer, copper shield and oversheath；Copper shield passes through ground connection.
Further, epoxy resin support bar is made of two sections being flexibly connected, and can adjust height.
Further, Embedded defect is equipped in the crosslinked polyetylene insulated layer of cable body.
Further, the bottom margin of metal bottom organic glass lubricating cup is smooth, and pedestal connector guarantees cable core and pedestal
Good contact, reduces a possibility that high pressure lower body lower end is discharged in the oil.
Further, cable body is fixed on epoxy resin support bar by two copper clips；Two copper clips
Spacing can adjust, adjustable range be 20 to six ten centimetres.
Further, lubricating cup bottom connector is circular layout by several pieces of elastic steel contacts and is constituted, several elastic steel contacts
The internal internal diameter around the annular space formed is less than the diameter of cable core under natural conditions.
Compared with the existing technology, the invention has the following advantages:
1) bottom of organic glass lubricating cup is made of metal, and metal edge has carried out polishing smooth processing, pedestal connector
Guarantee that cable core is well contacted with pedestal, reduces a possibility that high pressure lower body lower end is discharged in the oil.
2) lubricating cup is fixed together with cable sample core by lubricating cup pedestal connector, has been tested, and need to only be extracted cable
?.Realize the reuse of lubricating cup terminal.
3) copper clip spacing is flexibly adjustable, and adjustable range is 20 to six ten centimetres.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of cable accessory partial discharge test terminal of the present invention for measuring Embedded defect；
Fig. 2 is the sectional view of cable body；
Fig. 3 is lubricating cup schematic diagram of base structure；
Fig. 4 is lubricating cup pedestal tab contact sectional view.
Specific embodiment
The content of the invention patent is described in further details with reference to the accompanying drawings and detailed description.
It please refers to shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, a kind of cable accessory for measuring Embedded defect of the present invention is locally put
Electric test terminal, including cable body 3, metal bottom organic glass lubricating cup 4, epoxy resin cushion block 5, insulator foot 7 and asphalt mixtures modified by epoxy resin
Rouge support rod 8, lubricating cup pedestal connector 10.
Cable body 3 includes core 31 and the protective layer for wrapping up core 31, and protective layer is successively partly led including interior from the inside to the outside
Electric layer 32, crosslinked polyetylene insulated layer 33, outer semiconducting layer 34, copper shield 35 and oversheath 36.Interior outer semiconducting layer plays
The effect of uniform electric field and alternate shielding, crosslinked polyetylene insulated layer are the major insulation of cable, and the core of current-carrying is generally copper material
Or aluminium.
Lubricating cup pedestal connector 10 is made of 16 pieces of elastic steel contacts 41, and internal diameter is slightly smaller than cable core.
31 upper end of core of cable body 3 is fixedly connected with copper lug 2, and copper lug 2 is connected with high-voltage connection 1；Cable sheet
31 end portion of core of body 3 is exposed outside protective layer, and the copper shield 35 of cable body 3 passes through ground connection.
The bottom of metal bottom organic glass lubricating cup 4 is made of metal, and metal edge has carried out polishing smooth processing, is reduced
A possibility that shelf depreciation, occurs for sample terminal；Bottom is equipped with organic glass wall of cup and connector, and pedestal connector ensure that electricity
Cable core is well contacted with pedestal.Silicone oil is housed in metal bottom organic glass lubricating cup 4.
On the bottom setting epoxy resin cushion block 5 of metal bottom organic glass lubricating cup 4, epoxy resin cushion block 5 is fixed on insulation
On pedestal 7, the side resin that insulator foot 7 is located at epoxy resin cushion block 5 is fixed with epoxy resin support bar 8.Epoxy resin branch
Strut 8 is the support rod that can adjust height, is made of two sections.
Cable body 3 is fixed on epoxy resin support bar 8 by two copper clips 6, and the lower end of cable body 3 is protruded into
In metal bottom organic glass lubricating cup 4, in the core lower end inserted base connector 10 of cable body 3, keep elastic steel contact outside
It opens and clamps core lower end.
The present invention is a kind of for measuring the cable accessory partial discharge test terminal of Embedded defect in use, first production examination
Sample successively peels the outer of the oversheath of cable body, the copper shield of specific length and specific length in production specimen
Semi-conductive layer.Embedded defect is carried out in the main insulating layer of exposing, and connects ground wire on the copper shield of exposing, is finally put on
Cable termination attachment.The partial discharge test for measuring cable termination sample includes following operating procedure:
1) two copper clips 6 are adjusted to suitable position, 2/3rds height of silicone oil to lubricating cup is poured into lubricating cup 4；
2) cable body sample is inserted into metal bottom organic glass lubricating cup 4, the core lower end inserted base of cable body 3 connects
In first 10, and fix with copper clip the oversheath of cable body 3；
3) high-voltage connection and ground line, applied voltage test are connected.
Claims (4)
1. for measuring the cable accessory partial discharge test terminal of Embedded defect, which is characterized in that including cable body (3),
Metal bottom organic glass lubricating cup (4), epoxy resin cushion block (5), insulator foot (7), epoxy resin support bar (8) and lubricating cup bottom connect
Head (10)；
Cable body includes core (31) and the protective layer for wrapping up core (31), and the core upper end of cable body is fixedly connected with copper
Nose (2), copper lug are connected with high-voltage connection (1)；The core end portion of cable body is exposed outside protective layer；Metal bottom
The bottom of organic glass lubricating cup is made of metal；Bottom is equipped with lubricating cup bottom connector (10) and organic glass wall of cup, organic glass
Wall of cup is by lubricating cup bottom connector (10) around wherein；Silicone oil is housed in metal bottom organic glass lubricating cup；
The bottom of metal bottom organic glass lubricating cup is set on epoxy resin cushion block, and epoxy resin cushion block is fixed on insulator foot
On；The side of epoxy resin cushion block is provided with the epoxy resin support bar being fixed on insulator foot；
Cable body is fixed on epoxy resin support bar by copper clip (6), and metal bottom is protruded into the lower end of cable body to be had
In machine glass oil cup, the core lower end of cable body is fixed by lubricating cup bottom connector (10), and with metal bottom organic glass lubricating cup
Bottom well contacts；
Lubricating cup bottom connector (10) is circular layout by 16 pieces of elastic steel contacts and is constituted, and 16 pieces of elastic steel contacts are interior under natural conditions
The internal diameter that portion surrounds the annular space formed is less than the diameter of cable core；
Protective layer from the inside to the outside successively include interior semi-conductive layer (32), crosslinked polyetylene insulated layer (33), outer semiconducting layer (34),
Copper shield (35) and oversheath (36)；Copper shield (35) passes through ground connection；
Embedded defect is equipped in the crosslinked polyetylene insulated layer of cable body.
2. according to claim 1 for measuring the cable accessory partial discharge test terminal of Embedded defect, feature exists
In epoxy resin support bar is made of two sections being flexibly connected, and can adjust height.
3. according to claim 1 for measuring the cable accessory partial discharge test terminal of Embedded defect, feature exists
In the bottom margin of metal bottom organic glass lubricating cup is smooth, and lubricating cup bottom connector guarantees cable core and metal bottom organic glass oil
The bottom of cup well contacts, and reduces a possibility that high pressure lower body lower end is discharged in the oil.
4. according to claim 1 for measuring the cable accessory partial discharge test terminal of Embedded defect, feature exists
In cable body is fixed on epoxy resin support bar by two copper clips (6)；The spacing of two copper clips can be adjusted
Section, adjustable range are 20 to six ten centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710198584.1A CN106841953B (en) | 2017-03-29 | 2017-03-29 | For measuring the cable accessory partial discharge test terminal of Embedded defect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710198584.1A CN106841953B (en) | 2017-03-29 | 2017-03-29 | For measuring the cable accessory partial discharge test terminal of Embedded defect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106841953A CN106841953A (en) | 2017-06-13 |
| CN106841953B true CN106841953B (en) | 2019-10-25 |
Family
ID=59142124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710198584.1A Active CN106841953B (en) | 2017-03-29 | 2017-03-29 | For measuring the cable accessory partial discharge test terminal of Embedded defect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106841953B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1219969A1 (en) * | 2000-12-26 | 2002-07-03 | PIRELLI CAVI E SISTEMI S.p.A. | Termination assembly for power cable testing and methods for its use |
| CN102353879A (en) * | 2011-07-06 | 2012-02-15 | 浙江晨光电缆股份有限公司 | Cable partial discharge test terminal |
| CN203965578U (en) * | 2014-09-10 | 2014-11-26 | 国家电网公司 | A kind of for coaxial configuration solid insulation partial discharge test terminal |
| CN205038295U (en) * | 2015-08-24 | 2016-02-17 | 杭州电缆股份有限公司 | Detection apparatus for improve withstand voltage detection efficiency of cable |
-
2017
- 2017-03-29 CN CN201710198584.1A patent/CN106841953B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1219969A1 (en) * | 2000-12-26 | 2002-07-03 | PIRELLI CAVI E SISTEMI S.p.A. | Termination assembly for power cable testing and methods for its use |
| CN102353879A (en) * | 2011-07-06 | 2012-02-15 | 浙江晨光电缆股份有限公司 | Cable partial discharge test terminal |
| CN203965578U (en) * | 2014-09-10 | 2014-11-26 | 国家电网公司 | A kind of for coaxial configuration solid insulation partial discharge test terminal |
| CN205038295U (en) * | 2015-08-24 | 2016-02-17 | 杭州电缆股份有限公司 | Detection apparatus for improve withstand voltage detection efficiency of cable |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106841953A (en) | 2017-06-13 |
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| SE01 | Entry into force of request for substantive examination | ||
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| GR01 | Patent grant | ||
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Effective date of registration: 20231217 Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: STATE GRID SHAANXI ELECTRIC POWER Research Institute Patentee after: National Network (Xi'an) Environmental Protection Technology Center Co.,Ltd. Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: State Grid Corporation of China Patentee before: STATE GRID SHAANXI ELECTRIC POWER Research Institute |