CN105699861A - Aging test method for insulating part of middle and low voltage - Google Patents
Aging test method for insulating part of middle and low voltage Download PDFInfo
- Publication number
- CN105699861A CN105699861A CN201610039826.8A CN201610039826A CN105699861A CN 105699861 A CN105699861 A CN 105699861A CN 201610039826 A CN201610039826 A CN 201610039826A CN 105699861 A CN105699861 A CN 105699861A
- Authority
- CN
- China
- Prior art keywords
- cable
- aging
- insulation
- testing
- resistance value
- 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.)
- Withdrawn
Links
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
Abstract
The invention discloses an aging text method for an insulating part of a middle and low voltage cable, and the method is characterized in that the cable comprises a shielding line unit, an insulating lien unit, a grounding line, an external shielding sleeve, an external sheath, and the insulating part; the external sheath is disposed outside the external shielding sleeve; the insulating part is disposed outside the external sheath; the shielding line unit, the insulating line unit and the grounding line are twisted together in the external shielding sleeve; the method comprises the steps: 1, selecting at least three cable samples with the same length from a tested cable; 2, enabling the cable samples to be placed in a tested room with the constant temperature; 3, measuring the resistance values of the insulating parts of the cable samples when the temperatures of the cable samples are consistent with the temperature of the test room; 4, calculating the mean resistance value of the insulating parts of the cable samples, enabling the mean resistance value to be compared with a critical resistance value, so as to judge whether the insulating part of the cable is aged or not. The method simplifies the test flow of the aging of the insulating part of the cable, and improves the detection efficiency.
Description
Technical field
The present invention relates to the method for testing of a kind of cable。It is more particularly related to the method for testing that a kind of mesolow cable insulation parts is aging。
Background technology
Cable is requisite power equipment in industrial and civilian industry development, is widely used in electric energy transmission, control signal transmission and communication system, therefore safeguards and monitoring cable becomes and guarantees that requisite work is equipped in power system, communication system and control。
In insulation ag(e)ing, material property occurs and reversible change, and causes the reduction of insulating properties, affects aging action half and relates to the aspects such as heat, electricity, environment；And current domestic usual employing off-line checking method, live monitoring method and online test method, but detection method is all excessively complicated and poor efficiency, so needing a set of simple and effective detection method badly。
Summary of the invention
It is an object of the invention to solve at least the above, and the advantage that at least will be described later is provided。
In order to realize these purposes according to the present invention and further advantage, provide the method for testing that a kind of mesolow cable insulation parts is aging, it is characterized in that, described cable includes shielding line unit, covered wire unit, earth lead, external shroud, external jacket and insulation division, described external jacket is located at outside external shroud, described insulation division is positioned at outside described external jacket, and described shielding line unit, covered wire unit and earth lead are mutually stranded in described external shroud；
Described external shroud is made up of three layers shielding material, wherein the first screen layer adopts the zinc-plated copper wire crocheted net of 0.05mm to constitute, described first screen layer is positioned at described housing bottom, secondary shielding layer is positioned at outside described ground floor screen layer, described secondary shielding layer adopts the nickel alloy that nickeliferous mass percent is 80% of 0.2mm to constitute, 3rd screen layer is positioned at outside described secondary shielding layer, described 3rd screen layer adopts the conductive rubber of 0.15mm to constitute, 4th screen layer is positioned at outside described 3rd screen layer, to promote the effectiveness of described external shroud；
Described shielding line unit includes two mutual stranded wires and inner shield set, and described inner shield set is made up of the conductive rubber of 0.1mm；
Described insulation division is made up of two-layer insulation system, wherein ground floor insulation system is positioned at bottom described insulation division, described ground floor insulation system adopts the Thermoplastic Elastic Material Used of 0.1mm to constitute, second layer insulation system adopts the cross-linking polyethylene materials of 0.2mm to constitute, and described second layer insulation system is positioned at the top of described ground floor insulation system, to promote the insulating capacity of described insulation division；
The method of testing that described mesolow cable insulation parts is aging includes:
The first step, chooses the identical sample of cable of at least three segment length to ensure the accuracy of test data in tested cable；
Second step, is placed in the test cabinet that temperature is fixed temperature by sample of cable identical for described at least three segment length to ensure the stability of test data；
3rd step, when the sample of cable that described at least three segment length are identical is consistent with chamber temperatures, with double bridge measure described in the insulation division resistance value of the identical sample of cable of at least three segment length；
4th step, the insulation division average resistance of the sample of cable that at least three segment length described in calculating are identical, described average resistance is made with critical resistance value and compares, when described average resistance is more than or equal to described critical resistance value, then cable insulation parts is functional, when described average resistance is less than described critical resistance value, then cable insulation parts is aging。
Preferably, described covered wire unit includes two mutual stranded wires。
Preferably, described wire is formed by the tinned wird that at least two strands of internal diameters are 0.1～0.3mm is stranded, to strengthen the intensity of wire。
Preferably, described wire is formed by the tinned wird that at least two strands of internal diameters are 0.15mm is stranded, to strengthen the intensity of wire。
Preferably, described earth lead is made up of at least two strands of mutual stranded galvanized steel bar lines, to strengthen the intensity of earth lead。
Preferably, described chamber temperatures is 20～25 DEG C, to simplify measuring and calculating。
Preferably, described critical resistance value is 200 Ω/km, to judge that whether cable is aging。
Preferably, the EP rubbers that described external jacket adopts thickness to be 0.1mm is constituted。
Type of the present invention at least includes simplifying the flow process that cable insulation parts is aging, improves the beneficial effect of detection efficiency。
Part is embodied by the further advantage of the present invention, target and feature by description below, and part is also by by being understood by those skilled in the art the research of the present invention and practice。
Detailed description of the invention
The present invention is described in further detail below, to make those skilled in the art can implement according to this with reference to description word。
Embodiment 1
The present invention provides the method for testing that a kind of mesolow cable insulation parts is aging, it is characterized in that, described cable includes shielding line unit, covered wire unit, earth lead, external shroud, external jacket and insulation division, described external jacket is located at outside external shroud, described insulation division is positioned at outside described external jacket, and described shielding line unit, covered wire unit and earth lead are mutually stranded in described external shroud；
Described covered wire unit includes two mutual stranded wires；The EP rubbers that described external jacket adopts thickness to be 0.1mm is constituted；Described earth lead is made up of at least two strands of mutual stranded galvanized steel bar lines, to strengthen the intensity of earth lead；Described wire is formed by the tinned wird that at least two strands of internal diameters are 0.1mm is stranded, to strengthen the intensity of wire；
Described external shroud is made up of three layers shielding material, wherein the first screen layer adopts the zinc-plated copper wire crocheted net of 0.05mm to constitute, described first screen layer is positioned at described housing bottom, secondary shielding layer is positioned at outside described ground floor screen layer, described secondary shielding layer adopts the nickel alloy that nickeliferous mass percent is 80% of 0.2mm to constitute, 3rd screen layer is positioned at outside described secondary shielding layer, described 3rd screen layer adopts the conductive rubber of 0.15mm to constitute, 4th screen layer is positioned at outside described 3rd screen layer, to promote the effectiveness of described external shroud；
Described shielding line unit includes two mutual stranded wires and inner shield set, and described inner shield set is made up of the conductive rubber of 0.1mm；
Described insulation division is made up of two-layer insulation system, wherein ground floor insulation system is positioned at bottom described insulation division, described ground floor insulation system adopts the Thermoplastic Elastic Material Used of 0.1mm to constitute, second layer insulation system adopts the cross-linking polyethylene materials of 0.2mm to constitute, and described second layer insulation system is positioned at the top of described ground floor insulation system, to promote the insulating capacity of described insulation division；
The method of testing that described mesolow cable insulation parts is aging includes:
The first step, chooses the identical sample of cable of at least three segment length to ensure the accuracy of test data in tested cable；
Second step, is placed in the test cabinet that temperature is fixed temperature by sample of cable identical for described at least three segment length, and chamber temperatures is 25 DEG C, to ensure the stability of test data；
3rd step, when the sample of cable that described at least three segment length are identical is consistent with chamber temperatures, with double bridge measure described in the insulation division resistance value of the identical sample of cable of at least three segment length；
4th step, the insulation division average resistance of the sample of cable that at least three segment length described in calculating are identical, described average resistance is made with critical resistance value and compares, when described average resistance is more than or equal to described critical resistance value 200 Ω/km, to judge that whether cable is aging, then cable insulation parts is functional, and when described average resistance is less than 200 Ω/km, then cable insulation parts is aging。
Embodiment 2
The present invention provides the method for testing that a kind of mesolow cable insulation parts is aging, it is characterized in that, described cable includes shielding line unit, covered wire unit, earth lead, external shroud, external jacket and insulation division, described external jacket is located at outside external shroud, described insulation division is positioned at outside described external jacket, and described shielding line unit, covered wire unit and earth lead are mutually stranded in described external shroud；
Described covered wire unit includes two mutual stranded wires；The EP rubbers that described external jacket adopts thickness to be 0.1mm is constituted；Described earth lead is made up of at least two strands of mutual stranded galvanized steel bar lines, to strengthen the intensity of earth lead；Described wire is formed by the tinned wird that at least two strands of internal diameters are 0.15mm is stranded, to strengthen the intensity of wire；
Described external shroud is made up of three layers shielding material, wherein the first screen layer adopts the zinc-plated copper wire crocheted net of 0.05mm to constitute, described first screen layer is positioned at described housing bottom, secondary shielding layer is positioned at outside described ground floor screen layer, described secondary shielding layer adopts the nickel alloy that nickeliferous mass percent is 80% of 0.2mm to constitute, 3rd screen layer is positioned at outside described secondary shielding layer, described 3rd screen layer adopts the conductive rubber of 0.15mm to constitute, 4th screen layer is positioned at outside described 3rd screen layer, to promote the effectiveness of described external shroud；
Described shielding line unit includes two mutual stranded wires and inner shield set, and described inner shield set is made up of the conductive rubber of 0.1mm；
Described insulation division is made up of two-layer insulation system, wherein ground floor insulation system is positioned at bottom described insulation division, described ground floor insulation system adopts the Thermoplastic Elastic Material Used of 0.1mm to constitute, second layer insulation system adopts the cross-linking polyethylene materials of 0.2mm to constitute, and described second layer insulation system is positioned at the top of described ground floor insulation system, to promote the insulating capacity of described insulation division；
The method of testing that described mesolow cable insulation parts is aging includes:
The first step, chooses the identical sample of cable of at least three segment length to ensure the accuracy of test data in tested cable；
Second step, is placed in the test cabinet that temperature is fixed temperature by sample of cable identical for described at least three segment length, and chamber temperatures is 23 DEG C, to ensure the stability of test data；
3rd step, when the sample of cable that described at least three segment length are identical is consistent with chamber temperatures, with double bridge measure described in the insulation division resistance value of the identical sample of cable of at least three segment length；
4th step, the insulation division average resistance of the sample of cable that at least three segment length described in calculating are identical, described average resistance is made with critical resistance value and compares, when described average resistance is more than or equal to described critical resistance value 200 Ω/km, to judge that whether cable is aging, then cable insulation parts is functional, and when described average resistance is less than 200 Ω/km, then cable insulation parts is aging。
Embodiment 3
The present invention provides the method for testing that a kind of mesolow cable insulation parts is aging, it is characterized in that, described cable includes shielding line unit, covered wire unit, earth lead, external shroud, external jacket and insulation division, described external jacket is located at outside external shroud, described insulation division is positioned at outside described external jacket, and described shielding line unit, covered wire unit and earth lead are mutually stranded in described external shroud；
Described covered wire unit includes two mutual stranded wires；The EP rubbers that described external jacket adopts thickness to be 0.1mm is constituted；Described earth lead is made up of at least two strands of mutual stranded galvanized steel bar lines, to strengthen the intensity of earth lead；Described wire is formed by the tinned wird that at least two strands of internal diameters are 0.3mm is stranded, to strengthen the intensity of wire；
Described external shroud is made up of three layers shielding material, wherein the first screen layer adopts the zinc-plated copper wire crocheted net of 0.05mm to constitute, described first screen layer is positioned at described housing bottom, secondary shielding layer is positioned at outside described ground floor screen layer, described secondary shielding layer adopts the nickel alloy that nickeliferous mass percent is 80% of 0.2mm to constitute, 3rd screen layer is positioned at outside described secondary shielding layer, described 3rd screen layer adopts the conductive rubber of 0.15mm to constitute, 4th screen layer is positioned at outside described 3rd screen layer, to promote the effectiveness of described external shroud；
Described shielding line unit includes two mutual stranded wires and inner shield set, and described inner shield set is made up of the conductive rubber of 0.1mm；
Described insulation division is made up of two-layer insulation system, wherein ground floor insulation system is positioned at bottom described insulation division, described ground floor insulation system adopts the Thermoplastic Elastic Material Used of 0.1mm to constitute, second layer insulation system adopts the cross-linking polyethylene materials of 0.2mm to constitute, and described second layer insulation system is positioned at the top of described ground floor insulation system, to promote the insulating capacity of described insulation division；
The method of testing that described mesolow cable insulation parts is aging includes:
The first step, chooses the identical sample of cable of at least three segment length to ensure the accuracy of test data in tested cable；
Second step, is placed in the test cabinet that temperature is fixed temperature by sample of cable identical for described at least three segment length, and chamber temperatures is 25 DEG C, to ensure the stability of test data；
3rd step, when the sample of cable that described at least three segment length are identical is consistent with chamber temperatures, with double bridge measure described in the insulation division resistance value of the identical sample of cable of at least three segment length；
4th step, the insulation division average resistance of the sample of cable that at least three segment length described in calculating are identical, described average resistance is made with critical resistance value and compares, when described average resistance is more than or equal to described critical resistance value 200 Ω/km, to judge that whether cable is aging, then cable insulation parts is functional, and when described average resistance is less than 200 Ω/km, then cable insulation parts is aging。
Although embodiment of the present invention are disclosed as above, but listed utilization that it is not restricted in description and embodiment, it can be applied to various applicable the field of the invention completely, for those skilled in the art, it is easily achieved other amendment, therefore, under the general concept limited without departing substantially from claim and equivalency range, the present invention is not limited to specific details。
Claims (8)
1. the method for testing that a mesolow cable insulation parts is aging, it is characterized in that, described cable includes shielding line unit, covered wire unit, earth lead, external shroud, external jacket and insulation division, described external jacket is located at outside external shroud, described insulation division is positioned at outside described external jacket, and described shielding line unit, covered wire unit and earth lead are mutually stranded in described external shroud；
Described external shroud is made up of three layers shielding material, wherein the first screen layer adopts the zinc-plated copper wire crocheted net of 0.05mm to constitute, described first screen layer is positioned at described housing bottom, secondary shielding layer is positioned at outside described ground floor screen layer, described secondary shielding layer adopts the nickel alloy that nickeliferous mass percent is 80% of 0.2mm to constitute, 3rd screen layer is positioned at outside described secondary shielding layer, described 3rd screen layer adopts the conductive rubber of 0.15mm to constitute, and the 4th screen layer is positioned at outside described 3rd screen layer；
Described shielding line unit includes two mutual stranded wires and inner shield set, and described inner shield set is made up of the conductive rubber of 0.1mm；
Described insulation division is made up of two-layer insulation system, wherein ground floor insulation system is positioned at bottom described insulation division, described ground floor insulation system adopts the Thermoplastic Elastic Material Used of 0.1mm to constitute, second layer insulation system adopts the cross-linking polyethylene materials of 0.2mm to constitute, and described second layer insulation system is positioned at the top of described ground floor insulation system；
The method of testing that described mesolow cable insulation parts is aging includes:
The first step, chooses the sample of cable that at least three segment length are identical in tested cable；
Second step, is placed in sample of cable identical for described at least three segment length in the test cabinet that temperature is fixed temperature；
3rd step, when the sample of cable that described at least three segment length are identical is consistent with chamber temperatures, with double bridge measure described in the insulation division resistance value of the identical sample of cable of at least three segment length；
4th step, the insulation division average resistance of the sample of cable that at least three segment length described in calculating are identical, described average resistance is made with critical resistance value and compares, when described average resistance is more than or equal to described critical resistance value, then cable insulation parts is functional, when described average resistance is less than described critical resistance value, then cable insulation parts is aging。
2. the method for testing that mesolow cable insulation parts as claimed in claim 1 is aging, it is characterised in that described covered wire unit includes two mutual stranded wires。
3. the method for testing that mesolow cable insulation parts as described in claim 1 and claim 2 is aging, it is characterised in that described wire is formed by the tinned wird that at least two strands of internal diameters are 0.1～0.3mm is stranded。
4. the method for testing that mesolow cable insulation parts as claimed in claim 1 is aging, it is characterised in that described wire is formed by the tinned wird that at least two strands of internal diameters are 0.15mm is stranded。
5. the method for testing that mesolow cable insulation parts as claimed in claim 1 is aging, it is characterised in that described earth lead is made up of at least two strands of mutual stranded tinned wirds。
6. the method for testing that mesolow cable insulation parts as claimed in claim 1 is aging, it is characterised in that described chamber temperatures is 20～25 DEG C。
7. the method for testing that mesolow cable insulation parts as claimed in claim 1 is aging, it is characterised in that described critical resistance value is 200 Ω/km。
8. the method for testing that mesolow cable insulation parts as claimed in claim 1 is aging, it is characterised in that the EP rubbers that described external jacket adopts thickness to be 0.1mm is constituted。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610039826.8A CN105699861A (en) | 2016-01-21 | 2016-01-21 | Aging test method for insulating part of middle and low voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610039826.8A CN105699861A (en) | 2016-01-21 | 2016-01-21 | Aging test method for insulating part of middle and low voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105699861A true CN105699861A (en) | 2016-06-22 |
Family
ID=56226666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610039826.8A Withdrawn CN105699861A (en) | 2016-01-21 | 2016-01-21 | Aging test method for insulating part of middle and low voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105699861A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5283390A (en) * | 1992-07-07 | 1994-02-01 | W. L. Gore & Associates, Inc. | Twisted pair data bus cable |
| JP2002208321A (en) * | 2001-01-11 | 2002-07-26 | Auto Network Gijutsu Kenkyusho:Kk | Shield cable |
| CN102831974A (en) * | 2011-06-13 | 2012-12-19 | 上海飞航电线电缆有限公司 | Cross-linked-polyethylene-insulated polyvinyl-chloride-sheathed medium voltage cable |
| CN204066849U (en) * | 2014-08-19 | 2014-12-31 | 远东电缆有限公司 | A kind of wisdom charging energy sources stake direct current shielded type cable |
-
2016
- 2016-01-21 CN CN201610039826.8A patent/CN105699861A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5283390A (en) * | 1992-07-07 | 1994-02-01 | W. L. Gore & Associates, Inc. | Twisted pair data bus cable |
| JP2002208321A (en) * | 2001-01-11 | 2002-07-26 | Auto Network Gijutsu Kenkyusho:Kk | Shield cable |
| CN102831974A (en) * | 2011-06-13 | 2012-12-19 | 上海飞航电线电缆有限公司 | Cross-linked-polyethylene-insulated polyvinyl-chloride-sheathed medium voltage cable |
| CN204066849U (en) * | 2014-08-19 | 2014-12-31 | 远东电缆有限公司 | A kind of wisdom charging energy sources stake direct current shielded type cable |
Non-Patent Citations (2)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局等: "《中华人民共和国国家标准 GB／T 3048.5—2007》", 3 December 2007 * |
| 王效飞等: "电线/电缆绝缘电阻测试方法比较", 《世界科技研究与发展》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204116460U (en) | A kind of measuring system being applicable to insulating material high field conduction characteristic | |
| CN204946585U (en) | With the insulated cable of Graphene sheath | |
| CN202453451U (en) | Earth grid corrosion and broken point diagnosing system for large and medium-sized substations | |
| CN105652159A (en) | Power cable quality detection method | |
| Du et al. | An investigation on discharge fault in buffer layer of 220 kV XLPE AC cable | |
| Joseph et al. | Numerical modelling, simulation and experimental validation of partial discharge in cross‐linked polyethylene cables | |
| CN104575831B (en) | A kind of aluminium alloy core intelligent environmental protection type power cable | |
| CN205194359U (en) | Flexible pottery silicon rubber insulation fireproof cable | |
| CN105699812A (en) | Middle and low voltage cable insulation portion aging test method | |
| CN105699861A (en) | Aging test method for insulating part of middle and low voltage | |
| CN105548842A (en) | Middle and low voltage cable insulating part aging testing method | |
| CN103187150B (en) | The primary connection terminal of high-tension current inductor and installation method thereof | |
| CN110233002A (en) | A kind of processing method of power cable | |
| Li et al. | Effects of the environmental factors on electrical properties of high voltage cable buffer layer | |
| CN110456243B (en) | Insulation sample direct current breakdown testing device | |
| CN107490505A (en) | A kind of heat-shrink tube test specimen and its preparation method and application | |
| CN201995151U (en) | Self-temperature-control heating cable used at low temperature | |
| CN203673866U (en) | Power cable capable of monitoring operating temperature | |
| CN202855406U (en) | High carrying capacity light electric welding machine cable | |
| WO2020155599A1 (en) | Compensation wire | |
| CN112180191A (en) | Wire and cable aging state assessment method | |
| CN207319725U (en) | New high life three-layer insulated safety wire | |
| CN204706368U (en) | A kind of temperature detection monitoring type electric cable of submersible pump | |
| CN206075936U (en) | Power line and electric equipment | |
| CN219016444U (en) | Impedance numerical value test structure of large-current water-cooled cable of electric arc furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160622 |
|
| WW01 | Invention patent application withdrawn after publication |