GB 5023.1-1997 Polyvinyl chloride insulated cables with rated voltage up to and including 450/750V Part 1: General requirements

This standard applies to rigid and flexible cables with polyvinyl chloride insulation and sheath (if any) of rated voltage Uo/U of 450/750V and below, used in power plants with AC nominal voltage not exceeding 450/750V. GB 5023.1-1997 Polyvinyl chloride insulated cables with rated voltage 450/750V and below Part 1: General requirements GB5023.1-1997 Standard download decompression password: www.bzxz.net

GB5023.1~5023.7—1997
This standard GB5023.1~5023.7—1997 is revised according to the International Electrotechnical Commission (IEC) standard, IEC227 Rated voltage 450/750V and below Vinyl chloride insulated cables Parts 1 to 7 (latest version). The products applicable to this standard are all products that are subject to compulsory certification by the my country Electrical Product Certification Committee (also the IEC Electrical Equipment Conformity Certification Committee IECEE China National Committee). These products are widely used in related household appliances and power tools products that are subject to compulsory certification by the my country Electrical Product Certification Committee. Therefore, this standard is revised in accordance with the requirements of the IEC standard.
This standard is divided into the following parts under the general title of "Nitrogen Chloride Vinyl Insulated Relays of Rated Voltage 450/750V and Below": Part 1 (GB5023.1): General requirements
Part 2 (GB5023.2): Test methods
Part 3 (GB5023.3): Unsheathed cables for fixed wiring Part 4 (GB5023.4): Sheathed cables for fixed wiring Part 5 (GB5023.5), flexible cables (flexible cords) Part 6 (GB5023.6): Elevator cables and cables for sexual connections Part 7 (GB5023.7): 2-core or multi-core shielded and unshielded flexible cables Parts 3 to 7 should be used together with Parts 1 and 2. When formulating standards for other types of cables, they can be added after Part 7.
To make this standard suitable for domestic and international trade needs, this standard adopts the product model representation method of Appendix A of Part 1 of [EC227] and the corresponding representation method of the previous version of the standard model in parallel, and adds product specifications to the product representation method in addition to the product model, which is represented by rated voltage, number of cores and nominal conductor cross-section. Products not included in this standard in the previous version of the standard, including polyvinyl chloride insulated wires with an operating temperature of 105C and aluminum core polyvinyl fluoride insulated wires and cables, will be formulated and issued according to the actual needs of the market. This standard will replace GB5023.15023.3-85 from the date of implementation. Appendix A of Part 1 of this standard is an appendix to the standard; Appendix 1 of Part 1 of this standard is a reminder appendix. This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of the Shanghai Cable Research Institute of the Ministry of Machinery Industry. The drafting unit of this standard: Shanghai Cable Research Institute of the Ministry of Machinery Industry. The main drafter of this standard is Wu Zengquan.
GB 5023-1~5023. 7—1997
IEC Foreword
1. IEC (International Electrotechnical Commission) is an international standardization organization composed of national electrotechnical technical committees (IEC National Committees). The purpose of IEC is to promote international cooperation on all issues of standardization in the electrical and electronic fields. To achieve this goal, IEC publishes international standards in addition to organizing various activities and entrusts technical committees to formulate these standards. Any national committee interested in a standard can participate in the formulation of the standard. International organizations, governments or non-governmental organizations that have business dealings with IEC can also participate in the formulation of standards. IEC and the International Organization for Standardization (ISO) work closely under the terms of mutual agreement. 2. The IEC formal resolutions or agreements formulated by the technical committees on behalf of the national committees on technical issues of particular concern to them express the international consensus on these issues as much as possible. 3. These resolutions or agreements are published and distributed in the form of standards, technical reports or guidelines, and are used internationally in the form of recommended documents, and these documents are recognized by the national committees in this sense. 4. To promote international unification, each IEC National Committee shall frankly adopt TEC international standards in its national and regional standards to the greatest extent possible. Any differences between IEC standards and corresponding national or regional standards shall be clearly stated in the national or regional standards. 5. IEC does not provide a marking method to indicate the approval of products, nor does IEC assume responsibility for any equipment that claims to meet the requirements of a certain standard.
International standard IEC227-1227-7 was formulated by the 20th Technical Committee of IEC: "Cables" under the 20B Technical Committee! "Low Jade Cables".
[The second edition of the EC227-1 standard replaces the first edition published in 1979 and the first amendment in 1985, and is a technical revision of the 1979 version.
This standard text is based on its first edition and the following documents: June Law/DIS Document
20B(CO)115
Voting Report
20B(CO)124
All information on the voting to approve this standard can be found in the "Voting Report\" listed in the table above. The second edition of the IEC227-3 standard replaces the first edition published in 1979 and is a technical revision of the 1979 version. This standard text is based on its first edition and the following documents: June Law/DIS Document
20B(CO)115
Voting Report
20B(CO)124
All information on the voting for approval of this standard can be found in the \Voting Report\ listed in the table above. [The second edition of the IEC227-4 standard replaces the first edition published in 1979. The text of this standard is based on its first edition and the following documents, June Law/DIS Document
20B(CO)I12
Voting Report
20B(CO)122
All information on the voting for approval of this standard can be found in the \Voting Report\ listed in the table above. The second edition of the IEC227-6 standard replaces the first edition published in 1981. The text of this standard is based on its first edition and the following documents: GB 5023. 1~5023. 7—1997
June Law/DIS Documents
20B(CO)89
Voting Report
20B(CO)96
All information on the voting to approve this standard can be found in the "Voting Report" listed in the table above. The text of the IEC 227-7 standard is based on the following documents: June Law/DIS Documents
20B/177/DIS
Voting Report
20B/199/RVD
All information on the voting to approve this standard can be found in the "Voting Report" listed in the table above. EC227 consists of the following parts under the general title "Polyvinyl chloride insulated cables of rated voltage 450/750V and below": Part 1: General requirements
Part 2: Test methods
Part 3, Unsheathed cables for fixed wiring Part 4: Sheathed cables for fixed wiring Part 5: Flexible cables (cords)
Part 6: Lift cables and cables for pull-through connections Part 7: 2-core or multi-core screened and unscreened flexible cables Parts 3 to 7 apply to special cables and should be used together with Parts 1 and 2 When other types of cable standards are formulated, they can be added after Part 7.
The appendices to this series of standards are indispensable parts of the standards. 1 General
1.1 Scope
National Standard of the People's Republic of China
Polyvlnyl chloride insulated cahlesof rated voltages up to and including 450/750 VPart 1:General requirements
GB 5023.11997
idt IEC 227-1: 1993
Amendment No. 1 1995
Replaces GB5023.1-85
Part 1 of this standard applies to rigid and flexible cables with vinyl chloride insulation and sheath (if any) with rated voltage U./U of 450/750V and below, used in power devices with AC nominal voltage not exceeding 450/750 V. Note: For certain types of flexible cables, the term "flexible wire" can be used. Various types of cables are specified in standards such as GB5023.3 and GB5023.4. The cable model representation method is shown in Appendix A. The test methods specified in parts 1, 3, 1, etc. can be found in GB5023.2. GB/T12666.2 and the relevant parts of GB/T2951. 1.2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is released, the versions shown are valid. All standards will be revised,Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2951.1-1997 General test methods for cable insulation and sheathing materials Part 1: General test methods
Section 1: Thickness and dimensional measurement - Mechanical properties test GB/T 2951.2—1997
General test methods for cable insulation and sheathing materials Part 1: General test methods
Section 2: Thermal aging test methods
GB/T2951.4—1997 General test methods for cable insulation and sheathing materials Part 1: General test methods
Section 4: Low temperature test
GB/T 2951.5—1997
General test methods for cable insulation and sheathing materials Part 2: Special test methods for elastomer mixtures Section 1: Odor resistance test - Hot extension test - Mineral oil immersion test
General test methods for cable insulation and sheathing materials GB/T2951.61997
Part 3: Special test methods for polyvinyl chloride mixtures Section 1: High temperature pressure test - Anti-cracking test GB/T 2951. 7—1997
General test methods for cable insulation and sheathing materials Part 3: Special test methods for polyvinyl chloride mixtures Approved by the State Administration of Technical Supervision on July 30, 1997 and implemented on September 1, 1998
GB/T3956—-1997
GB 5023. 2—1997
GB 5023. 1—1997
Section 2: Weight loss test Thermal stability test Cable conductors
Polyvinyl chloride insulated cables with rated voltages up to and including 450/750V Part 2: Test methods
Polyvinyl chloride insulated cables with rated voltages up to and including 450/750V GB5023.3—1997
Part 3: Unsheathed cables for fixed wiring GB 5023. 4—1997
Polyvinyl chloride insulated cables with rated voltages up to and including 450/750V Part 4: Sheathed cables for fixed wiring
Polyvinyl chloride insulated cables with rated voltages up to and including 450/750V GB 5023.5—1997
Part 5: Flexible cables (cords)
GB 5023.6—1997
Polyvinyl chloride insulated cables with rated voltages of 450/750V and below Part 6: Elevator cables and flexible connecting cables GB5023.7—1997 Polyvinyl chloride insulated cables with rated voltages of 450/750V and below Part 7: 2-core or multi-core shielded and non-shielded flexible cables GB/T12666.2—90 Burning test methods for wires and cables Part 2: Vertical burning test methods for single wires and cables IEC173:1964 Color of cores of flexible cables and flexible wires 2 Definitions
The following definitions apply to this standard.
2.1 Definitions of insulation and sheath materials
2.1.1 Polyvinyl chloride mixture (PVC)
Polyvinyl chloride mixture refers to a material whose specific component is polyvinyl chloride or one of its compounds after appropriate selection, proportioning and processing. The term can also be expressed as a mixture containing polyvinyl chloride and a certain polyvinyl chloride polymer. 2.1.2 Type of mixture
Mixtures are classified according to the properties measured by the specified tests. The type has no direct relationship with the composition of the mixture. 2.2 Definition of test method
2.2.1 Type test (symbol T)
Type test refers to the test conducted on a type of cable specified in this standard before supply according to general commercial principles to prove that the cable has good performance and can meet the specified use requirements. The essence of type test is that once these tests are conducted, they do not need to be repeated. If changes in cable materials or designs affect the performance of the cable, they must be repeated. 2.2.2 Sampling test (symbol S)
Sampling test is a test conducted on a sample of finished cable or on a component taken from a finished cable to prove that the finished cable product meets the design specifications.
2.3 Rated voltage
Rated voltage is the reference voltage for cable structural design and electrical performance testing. Rated voltage is represented by U,/U and the unit is V. U. is the effective value of the voltage between any insulated conductor and \ground" (metal sheath or surrounding medium of the relay). U is the effective value of the voltage between any two phase conductors of a multi-core cable or single-core cable system. When used in an AC system, the rated voltage of the cable should be at least equal to the nominal voltage of the cable system. This condition applies to both U. and U value.
When used in a DC system, the nominal voltage of the system should not be greater than 1.5 times the rated voltage of the cable. : The operating voltage of the system is allowed to exceed 10% of the nominal voltage of the system for a long time, if the rated voltage of the relay is at least equal to the nominal voltage of the system GB 5023. 11997
The cable can be used at a working voltage 10% higher than the rated voltage. 3 Marking
3.1 Origin marking and cable identification
The cable should have a continuous mark of the manufacturer's name, product model and rated voltage. The manufacturer's name mark can be a mark identification line or a repeated mark of the manufacturer's name or trademark. The product model representation method is shown in Appendix A. For cables used when the conductor temperature exceeds 70°C, the identification mark can be represented by the model or the maximum conductor temperature. The mark can be printed with ink or embossed on the insulation or sheath. 3.1.1 Marking continuity
The distance between the end of a complete mark and the beginning of the next mark: one sheath should not exceed 500mm
one insulation should not exceed 200mm.
3. 1.2 Abrasion resistance
The ink-printed mark should be resistant to abrasion. Check whether it meets the requirements according to the test specified in 1.8 of GB5023.2-1997. 3. 1.3 Clarity
All markings should be legible.
The color of the marking identification line should be easily identifiable or recognizable. If necessary, it can be wiped clean with gasoline or other suitable solvents. 3.2 Product Representation
Products should be represented by model, specification and number. Specifications include rated voltage, number of cores and nominal conductor cross-section. The cable packaging should be marked with labels or marks indicating the product model, specification, standard number, factory name and place of origin. 4 Insulated Core Identification
Each insulated core should be identified as follows: - Cables with 5 cores or less are identified by color, see 4. 11--Cables with more than 5 cores are identified by numbers, see 4.2. Note: Color chromaticity, especially the color spectrum of multi-core rigid cables, is under consideration. 4.1 Color identification method for insulated cores
4.1.1 General requirements
The insulated cores of cables shall be identified by colored insulation or other appropriate methods. Except for the insulated cores identified by yellow/green combination colors, each insulated core of the cable shall use only one color. Any multi-core relay shall not use red, gray, white, and green and yellow that are not combination colors. 4.1.2 Color spectrum
The preferred color spectrum for flexible cables and single-core cables is: - Single-core cable: no preferred color spectrum. - Two-core cable: no preferred color spectrum.
Note: The insulated cores of unsheathed two-core parallel flexible cables do not need to be identified. - Three-core cable: yellow/green, light blue, brown, or light blue, black and brown. - Four-core cable: yellow/green, light blue, dark blue, brown, or light blue, black, brown, black or brown. 1. Five-core cable: yellow/green, light blue, black, brown, black or brown, or light blue, black, brown, black or brown, black or brown.
Each color should be clearly identifiable and resistant to abrasion. The abrasion resistance should be checked according to the test specified in 1.8 of GB5023.2-1997. 4.1.3 Yellow/green combination color
The two-color distribution of the yellow/green combination color insulated core should meet the following conditions (according to IEC173): GB 5023. 1-1997
For each section of 15m long two-color insulated core, one color should cover at least 30% of the surface of the insulated core. And not more than 70%, while the other color covers the rest of the insulated core. Note: Explanation on the use of yellow/green combination color and light blue: When the yellow/green combination color is used according to the above provisions, it means that it is specially used to identify the insulated core connected to the ground or similar protection purpose, and the light blue is used as the insulated core connected to the neutral line. If a neutral conductor is provided, light blue may be used to identify any insulated core other than the grounding or protective conductor. 4.2 Digital Identification Method for Insulated Cores
4.2.1 General Requirements
The insulation shall be of the same color and arranged in numerical sequence, except for yellow/green combination insulated cores (if any). If there are yellow/green combination insulated cores, they shall comply with 4.1.3 requirements, and should be placed on the outer layer. The digital numbering should start from 1 in the inner layer.
Numbers should be printed on the outer surface of the insulated wire core with Arabic numerals. The numerals should be the same color and have a clear contrast with the insulation color. The Arabic numerals must be legible.
4.2.2 Priority arrangement of signs
Numerical signs should appear at equal intervals along the insulated wire core, and two groups of numerical signs should be reversed. When the sign consists of a single number, the dash should be placed below the number. If the sign consists of two numbers, they should be arranged up and down and the dash should be placed below the lower number. The spacing d between two adjacent groups of numerical signs should not be greater than 50mm. The arrangement of the signs is shown in the figure below:
4.2.3 Abrasion resistance
Numerical signs should be abrasion-resistant and should be checked for compliance with the requirements according to the test specified in 1.8 of GB5023.2-1997. 5 General requirements for cable structure
5.1 Conductor
5.1.1 Material
The conductor should be annealed copper wire, but copper-clad flexible wire can also use copper alloy single wire. The single wire in the conductor can be untinned or tinned. 5.1.2 Structure
The maximum diameter of the single wire in the soft conductor (except the copper-clad flexible wire conductor) and the minimum number of single wires in the hard conductor should meet the requirements of GB/T 3956. The types of conductors used in various types of cables can be found in the product standards (GB5023.3, GB5023.4, etc.). The conductors of fixed-number cables should be round solid round stranded or compact round stranded conductors. Each conductor of the copper-clad flexible wire should be composed of multiple strands or multiple strands, and each strand consists of one or more fan-shaped copper wires or copper alloy wires spirally wound on a rope made of cotton yarn rope, amide rope or similar materials. 5.1.3 Structural inspection
The structure shall be inspected and measured to see if it complies with the requirements of 5.1.1 and 5.1.2 and IEC228. 5.1.4 Resistance
The resistance of each core conductor of the cable (except the pin-skinned flexible wire) at 20C shall comply with the requirements of various conductors specified in IEC228. It shall be inspected according to the test method specified in 2.1 of GB5023.2-1997 to see if it complies with the requirements. 5.2 Insulation
5.2.1 Material
The insulation shall be a polyvinyl chloride mixture specified for each type of cable in the product standard (GB5023.3, GB5023.4, etc.).
Fixed digital cable
Flexible cable
Heat-resistant cable for internal wiring
GE5023.1—1997
PVC/C type
PVC/D type
PVC/E type
The test requirements for different types of polyvinyl chloride mixtures are specified in Table 1. For the maximum temperature of cables insulated by any of the above mixtures, including those specified in the product standards (GB5023.3, GB5023.4, etc.), see the corresponding standards.
5.2.2 Extruded insulation
The insulation should be tightly extruded on the conductor. For cables other than copper-covered flexible wires, when stripping the insulation, the insulator, conductor or tinned layer (if any) should not be damaged, and it should be checked by inspection and manual measurement to see if it meets the requirements. 5.2.3 Thickness
The average value of insulation thickness shall not be less than the specified value of each type and specification of cable in the table listed in the product standard (GB5023.3, GB5023.4, etc.).
However, the thickness at any point may be less than the specified value, as long as it is not less than 90% of the specified value minus 0.1mm, it shall be checked for compliance with the requirements according to the test method specified in 1.9 of GB5023.2-1997. 5.2.4 Mechanical properties before and after aging
Insulation shall have sufficient mechanical strength and elasticity within the normal operating temperature range, and shall be checked for compliance with the requirements by the tests specified in Table 1. Applicable test methods and test requirements are specified in Table 1. Table 1 Requirements for non-electrical tests on polyvinyl chloride (PVC) insulation No. Test item Tensile strength and elongation at break Original properties in delivery state Tensile strength, Minimum intermediate value 1. 1. 2 Elongation at break: Minimum intermediate value 1. 2. 2 Properties after air oven aging 1. 2. 1 Aging conditions: Processing time 1- 2- 2
Tensile strength
-minimum intermediate value
Maximum rate of change
Elongation at break
Minimum intermediate value
Maximum rate of change\
Loss of life test
Aging conditions:
--temperature
-treatment time
-maximum value
Mixture model
135±2
10×24
115±2
10×24
Test method
2951-2
Article number
8. 1. 3. 1
Test items
Non-pollution test"
Aging conditions:
Machine performance after aging
Thermal shock test
Test conditions
—temperature
Processing time
Test results
High temperature pressure test
Test conditions:
Pressure on the blade
Heating time under load
Test results:
Maximum intermediate value of indentation depth
Low temperature bending test
Test conditions:|| tt||Apply low temperature time
Test results
Low temperature tensile test
Test conditions:
Temperature 3"
Apply low temperature time
Test results
Minimum elongation
Low temperature impact test"
Test conditions
Apply low temperature time
Drop weight
Test results
Thermal stability test
Test conditions:
Test results
Minimum average thermal stability time
GB 5023.1—1997
End of Table 1)
Mixture type
Same as 1.2.2 and 1.2.3
150±2
150±2
No cracking
150±2
See 8.1.4 in GB/T 2951.6—1997
See 8.1.5 in GB/T 2951.61997 80±2
—15±2
-15±2
—15±2
See 8.1.4 and 8.1. 5 No cracking
-15±2
—15±2
See 8.3.4 and 8.3.5 in GB/T2951.4-1997 20
—15±2
—15±2
See 8.5.5 in CB/T 2951.4-1997 See 8.5.4 in GB/T 2951.4-1997 See 8.5.5 in GB/T2951.4-1997
1) Rate of change, the ratio of the difference between the median value after aging and the median value before aging to the median value before aging, expressed as a percentage. 2) If applicable.
3) According to the climatic conditions in my country, the test temperature is specified as -15°C. 4) If the product standard (GB5023.3, GB5023.4, etc.) specifies the test method
2951-4
Sangwen No.
5.3 Filling
5-3.1 Material
GB5023.1—1997
Unless otherwise specified in the product standard (GB5023.3, GB5023.4, etc.), the filler shall be composed of one or any combination of the following materials:
Non-vulcanized rubber or plastic mixture;
A natural or synthetic textile fiber;
A paper.
When non-vulcanized rubber filling is used, its components should not have harmful interactions with the insulation and (or) sheath. 5.3.2 Encapsulation
In the product standards (GB5023.3, GB5023.4, etc.), it is specified for each type of cable whether there is a filler or whether the filling is formed by the sheath or inner sheath embedded between the insulating cores. The filler should fill the space between the insulating cores to form a practical circle. The filler should not adhere to the insulating core. The cable core and the filler can be tied together with a film or tape. 5.4 Inner sheath
5.4.1 Materials
Unless specified in the product standard (GB5023.4, etc.), the extruded inner sheath shall be composed of non-vulcanized rubber or plastic mixture. When non-vulcanized rubber is used to form the inner sheath, its components shall not produce harmful interactions with the insulation and (or) sheath. Compliance with the requirements shall be checked according to the test method specified in 8.1.4 of GB/T2951.2-1997. 5.4.2 Extruded inner sheath
The inner sheath shall be extruded on the insulating core and allowed to be embedded in the gap between the insulating cores to form a practical circle. The extruded inner sheath shall not adhere to the insulating core.
In the product standard (GB5023.4, etc.), it is specified for each type of cable whether there is an extruded inner sheath or whether the outer sheath can be embedded between the insulating cores to form a filling.
5.4.3 Thickness
Unless otherwise specified in the product standard (GB5023.4, etc.), the thickness of the extruded inner sheath is not required to be measured. 5.5 Sheath
5.5.1 Material
The sheath shall be a polyvinyl chloride mixture specified for each type of cable in the product standard (GB5023.4, etc.). Cable for fixed installation
Flexible cable
Oil-resistant sheathed flexible cable
PVC/ST4 type
PVC/ST5 type
PVC/ST9 type
The test requirements for different types of polyvinyl chloride mixtures are specified in Table 2. 5.5.2 Extruded sheath
The sheath shall be extruded in a single layer. When
a) for single-core cables, it shall be extruded on the insulating core; when
b) for other cables, it shall be extruded on the cabled core and the filler or inner sheath (if any). The sheath shall not adhere to the insulating core. An isolation layer composed of a film or tape may be placed on the inner layer of the sheath. If specified in the product standard (GB5023.4, etc.), the sheath can be embedded in the gap between the cable cores to form a filler. 5.5.3 Thickness
The average value of the sheath thickness should not be less than the specified value for each model and specification in the table listed in the product standard (GB5023.4, etc.). However, the thickness at any point can be less than the specified value, as long as it is not less than 85% of the specified value minus 0.1 mm. It should be checked according to the test method specified in 1.10 of GB5023.2-1997 to see if it meets the requirements. 5.5.4 Mechanical properties before and after aging
GB 5023. 1—1997
The sheath shall have sufficient mechanical strength and elasticity within the positive belt use temperature range. It shall be checked whether it meets the requirements according to the tests specified in Table 2. The test methods and test requirements are specified in Table 2.
Table 2 Non-electrical test requirements for polyvinyl chloride (PVC) sheaths No.
Test items
Tensile strength and elongation at break
Delivery status Original performance
Tensile strength:
-Minimum intermediate value
Elongation at break:
Small intermediate value
Performance after air oven aging
Aging conditions:
-Temperature
Processing time
Tensile strength
-Minimum intermediate value
Maximum rate of change 11
Elongation at break
-Minimum intermediate value| |tt||-Maximum rate of change\
Weight loss test
Aging conditions:
-Maximum value
Non-pollution frame test"
Aging conditions:
Aging start-up performance
Heat shock test
Test conditions
-Temperature
-Processing time
Test results
High temperature pressure test
Test conditions:
-Pressure applied on the blade
Heating time under load
Test results,
-Maximum intermediate value of indentation depth
Low temperature bending test
Test conditions:
PVC/ST4
Mixed model
PVC/ST5
PVC/ST9
Same as 1. 2.2 and 1.2.3
150±2
150±2
No cracking
150±2
See 8.2.4 in GB/T 2951.6—1997
See 8.2.580±2 in GB/T 2951.6—1997
Test method
Tea document number country
Test items
Temperature\
-Time of applying low temperature
Test results
Low-temperature tensile test
Test conditions:
-Temperature》
-Time of applying low temperature
Test results
-Minimum tensile strength
Low-temperature impact test
Test conditions:
one temperature
one low-pressure time
one falling weight
Test results
Mechanical properties after immersion in mineral oil
Test conditions:
one oil temperature
immersion time
Tensile strength
——maximum change rate 13
Elongation at break
——maximum change rate 1
GB 5023.1—1997
Table 2 (end)
Type and properties of mixtures
PVC/ST4 PVC/STS
-15±2
PVC/ST9
—15±2
See GB/T 2951.4—1997 8-2.3 No cracking
-15±2
—15±2
-15±2
GB/T 2951.4—1997 8.4.420
—15±2
—15±2
See GH/T 2951.4—1997 8.5. 5 See 8.5.4 of GB/T 2951.4-1997 See 8.5.69012
1) Rate of change, the ratio of the difference between the median value after aging and the median value before aging to the median value before aging, expressed as a percentage 2) If applicable.
3) According to my country's climatic conditions, the test temperature is specified as -15℃ 5.6 Finished cable test
5.6.1 Electrical properties
The cable should have sufficient dielectric strength and insulation resistance. It should be checked according to the test specified in Table 3 to see if it meets the requirements. The test methods and test requirements are specified in Table 3. Table 3 Electrical test requirements for PVC insulated cables
Test items
Conductor resistance measurement
Test results
Maximum value
Finished cable voltage test
Test conditions:
Rated voltage of cable
300/300 V300/500V450/750 V
See GB/T3956 and product standards
(GB 5023. 3, GB 5023. 4, etc.)
Test method
Article number
Test method
Article number2 Extruded sheath
The sheath shall be extruded in a single layer. When
a) for single-core cables, it shall be extruded on the insulating core; when
b) for other cables, it shall be extruded on the cable core and the filler or inner sheath (if any). The sheath shall not adhere to the insulating core. An isolation layer consisting of a film or tape may be placed on the inner layer of the sheath. If specified in the product standard (GB5023.4, etc.), the sheath may be embedded in the gap between the cable cores to form a filler. 5.5.3 Thickness
The average value of the sheath thickness shall not be less than the specified value for each model and specification in the table listed in the product standard (GB5023.4, etc.). However, the thickness at any point may be less than the specified value, as long as it is not less than 85% of the specified value minus 0.1 mm. It shall be checked for compliance with the requirements according to the test method specified in 1.10 of GB5023.2-1997. 5.5.4 Mechanical properties before and after aging
GB 5023. 1—1997
The sheath shall have sufficient mechanical strength and elasticity within the positive belt use temperature range. It shall be checked whether it meets the requirements according to the tests specified in Table 2. The test methods and test requirements are specified in Table 2.
Table 2 Non-electrical test requirements for polyvinyl chloride (PVC) sheaths No.
Test items
Tensile strength and elongation at break
Delivery status Original performance
Tensile strength:
-Minimum intermediate value
Elongation at break:
Small intermediate value
Performance after air oven aging
Aging conditions:
-Temperature
Processing time
Tensile strength
-Minimum intermediate value
Maximum rate of change 11
Elongation at break
-Minimum intermediate value| |tt||-Maximum rate of change\
Weight loss test
Aging conditions:
-Maximum value
Non-pollution frame test"
Aging conditions:
Aging start-up performance
Heat shock test
Test conditions
-Temperature
-Processing time
Test results
High temperature pressure test
Test conditions:
-Pressure applied on the blade
Heating time under load
Test results,
-Maximum intermediate value of indentation depth
Low temperature bending test
Test conditions:
PVC/ST4
Mixed model
PVC/ST5
PVC/ST9
Same as 1. 2.2 and 1.2.3
150±2
150±2
No cracking
150±2
See 8.2.4 in GB/T 2951.6—1997
See 8.2.580±2 in GB/T 2951.6—1997
Test method
Tea document number country
Test items
Temperature\
-Time of applying low temperature
Test results
Low-temperature tensile test
Test conditions:
-Temperature》
-Time of applying low temperature
Test results
-Minimum tensile strength
Low-temperature impact test
Test conditions:
one temperature
one low-pressure time
one falling weight
Test results
Mechanical properties after immersion in mineral oil
Test conditions:
one oil temperature
immersion time
Tensile strength
——maximum change rate 13
Elongation at break
——maximum change rate 1
GB 5023.1—1997
Table 2 (end)
Type and properties of mixtures
PVC/ST4 PVC/STS
-15±2
PVC/ST9
—15±2
See GB/T 2951.4—1997 8-2.3 No cracking
-15±2
—15±2
-15±2
GB/T 2951.4—1997 8.4.420
—15±2
—15±2
See GH/T 2951.4—1997 8.5. 5 See 8.5.4 of GB/T 2951.4-1997 See 8.5.69012
1) Rate of change, the ratio of the difference between the median value after aging and the median value before aging to the median value before aging, expressed as a percentage 2) If applicable.
3) According to my country's climatic conditions, the test temperature is specified as -15℃ 5.6 Finished cable test
5.6.1 Electrical properties
The cable should have sufficient dielectric strength and insulation resistance. It should be checked according to the test specified in Table 3 to see if it meets the requirements. The test methods and test requirements are specified in Table 3. Table 3 Electrical test requirements for PVC insulated cables
Test items
Conductor resistance measurement
Test results
Maximum value
Finished cable voltage test
Test conditions:
Rated voltage of cable
300/300 V300/500V450/750 V
See GB/T3956 and product standards
(GB 5023. 3, GB 5023. 4, etc.)
Test method
Article number
Test method
Article number2 Extruded sheath
The sheath shall be extruded in a single layer. When
a) for single-core cables, it shall be extruded on the insulating core; when
b) for other cables, it shall be extruded on the cable core and the filler or inner sheath (if any). The sheath shall not adhere to the insulating core. An isolation layer consisting of a film or tape may be placed on the inner layer of the sheath. If specified in the product standard (GB5023.4, etc.), the sheath may be embedded in the gap between the cable cores to form a filler. 5.5.3 Thickness
The average value of the sheath thickness shall not be less than the specified value for each model and specification in the table listed in the product standard (GB5023.4, etc.). However, the thickness at any point may be less than the specified value, as long as it is not less than 85% of the specified value minus 0.1 mm. It shall be checked for compliance with the requirements according to the test method specified in 1.10 of GB5023.2-1997. 5.5.4 Mechanical properties before and after aging
GB 5023. 1—1997
The sheath shall have sufficient mechanical strength and elasticity within the positive belt use temperature range. It shall be checked whether it meets the requirements according to the tests specified in Table 2. The test methods and test requirements are specified in Table 2.
Table 2 Non-electrical test requirements for polyvinyl chloride (PVC) sheaths No.
Test items
Tensile strength and elongation at break
Delivery status Original performance
Tensile strength:
-Minimum intermediate value
Elongation at break:
Small intermediate value
Performance after air oven aging
Aging conditions:
-Temperature
Processing time
Tensile strength
-Minimum intermediate value
Maximum rate of change 11
Elongation at break
-Minimum intermediate value| |tt||-Maximum rate of change\
Weight loss test
Aging conditions:
-Maximum value
Non-pollution frame test"
Aging conditions:
Aging start-up performance
Heat shock test
Test conditions
-Temperature
-Processing time
Test results
High temperature pressure test
Test conditions:
-Pressure applied on the blade
Heating time under load
Test results,
-Maximum intermediate value of indentation depth
Low temperature bending test
Test conditions:
PVC/ST4
Mixed model
PVC/ST5
PVC/ST9
Same as 1. 2.2 and 1.2.3
150±2
150±2
No cracking
150±2
See 8.2.4 in GB/T 2951.6—1997
See 8.2.580±2 in GB/T 2951.6—1997
Test method
Tea document number country
Test items
Temperature\
-Time of applying low temperature
Test results
Low-temperature tensile test
Test conditions:
-Temperature》
-Time of applying low temperature
Test results
-Minimum tensile strength
Low-temperature impact test
Test conditions:
one temperature
one low-pressure time
one falling weight
Test results
Mechanical properties after immersion in mineral oil
Test conditions:
one oil temperature
immersion time
Tensile strength
——maximum change rate 13
Elongation at break
——maximum change rate 1
GB 5023.1—1997
Table 2 (end)
Type and properties of mixtures
PVC/ST4 PVC/STS
-15±2
PVC/ST9
—15±2
See GB/T 2951.4—1997 8-2.3 No cracking
-15±2
—15±2
-15±2
GB/T 2951.4—1997 8.4.420
—15±2
—15±2
See GH/T 2951.4—1997 8.5. 5 See 8.5.4 of GB/T 2951.4-1997 See 8.5.69012
1) Rate of change, the ratio of the difference between the median value after aging and the median value before aging to the median value before aging, expressed as a percentage 2) If applicable.
3) According to my country's climatic conditions, the test temperature is specified as -15℃ 5.6 Finished cable test
5.6.1 Electrical properties
The cable should have sufficient dielectric strength and insulation resistance. It should be checked according to the test specified in Table 3 to see if it meets the requirements. The test methods and test requirements are specified in Table 3. Table 3 Electrical test requirements for PVC insulated cables
Test items
Conductor resistance measurement
Test results
Maximum value
Finished cable voltage test
Test conditions:
Rated voltage of cable
300/300 V300/500V450/750 V
See GB/T3956 and product standards
(GB 5023. 3, GB 5023. 4, etc.)
Test method
Article number
Test method
Article number580±2
Test method
Tea text number country
Test items
Temperature\
-Apply low temperature time
Test results
Low temperature tensile test
Test conditions:
-Temperature》
-Apply low temperature time
Test results
-Minimum tensile strength
Low temperature impact test
Test conditions:
one temperature
one low-pressure time
one falling weight
Test results
Mechanical properties after immersion in mineral oil
Test conditions:
one oil temperature
immersion time
Tensile strength
——maximum change rate 13
Elongation at break
——maximum change rate 1
GB 5023.1—1997
Table 2 (end)
Type and properties of mixtures
PVC/ST4 PVC/STS
-15±2
PVC/ST9
—15±2
See GB/T 2951.4—1997 8-2.3 No cracking
-15±2
—15±2
-15±2
GB/T 2951.4—1997 8.4.420
—15±2
—15±2bZxz.net
See GH/T 2951.4—1997 8.5. 5 See 8.5.4 of GB/T 2951.4-1997 See 8.5.69012
1) Rate of change, the ratio of the difference between the median value after aging and the median value before aging to the median value before aging, expressed as a percentage 2) If applicable.
3) According to my country's climatic conditions, the test temperature is specified as -15℃ 5.6 Finished cable test
5.6.1 Electrical properties
The cable should have sufficient dielectric strength and insulation resistance. It should be checked according to the test specified in Table 3 to see if it meets the requirements. The test methods and test requirements are specified in Table 3. Table 3 Electrical test requirements for PVC insulated cables
Test items
Conductor resistance measurement
Test results
Maximum value
Finished cable voltage test
Test conditions:
Rated voltage of cable
300/300 V300/500V450/750 V
See GB/T3956 and product standards
(GB 5023. 3, GB 5023. 4, etc.)
Test method
Article number
Test method
Article number580±2
Test method
Tea text number country
Test items
Temperature\
-Apply low temperature time
Test results
Low temperature tensile test
Test conditions:
-Temperature》
-Apply low temperature time
Test results
-Minimum tensile strength
Low temperature impact test
Test conditions:
one temperature
one low-pressure time
one falling weight
Test results
Mechanical properties after immersion in mineral oil
Test conditions:
one oil temperature
immersion time
Tensile strength
——maximum change rate 13
Elongation at break
——maximum change rate 1
GB 5023.1—1997
Table 2 (end)
Type and properties of mixtures
PVC/ST4 PVC/STS
-15±2
PVC/ST9
—15±2
See GB/T 2951.4—1997 8-2.3 No cracking
-15±2
—15±2
-15±2
GB/T 2951.4—1997 8.4.420
—15±2
—15±2
See GH/T 2951.4—1997 8.5. 5 See 8.5.4 of GB/T 2951.4-1997 See 8.5.69012
1) Rate of change, the ratio of the difference between the median value after aging and the median value before aging to the median value before aging, expressed as a percentage 2) If applicable.
3) According to my country's climatic conditions, the test temperature is specified as -15℃ 5.6 Finished cable test
5.6.1 Electrical properties
The cable should have sufficient dielectric strength and insulation resistance. It should be checked according to the test specified in Table 3 to see if it meets the requirements. The test methods and test requirements are specified in Table 3. Table 3 Electrical test requirements for PVC insulated cables
Test items
Conductor resistance measurement
Test results
Maximum value
Finished cable voltage test
Test conditions:
Rated voltage of cable
300/300 V300/500V450/750 V
See GB/T3956 and product standards
(GB 5023. 3, GB 5023. 4, etc.)
Test method
Article number
Test method
Article number
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