GB/T 31840.2-2025Aluminium alloy power cables with extruded insulation for rated voltages from 1 kV up to 35 kV - Part 2: Cables for rated voltages from 6 kV up to 30 kV (English PDF)
额定电压1kV（Um=1.2kV）到35kV（Um=40.5kV）铝合金芯挤包绝缘电力电缆 第2部分：额定电压6kV（Um=7.2kV）到30kV（Um=36kV）电缆
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 5, 2025
Implementation date
February 1, 2026
Scope
GB/T 31840.2-2025 is the English-translated version of 额定电压1kV（Um=1.2kV）到35kV（Um=40.5kV）铝合金芯挤包绝缘电力电缆 第2部分：额定电压6kV（Um=7.2kV）到30kV（Um=36kV）电缆.
GB/T 31840.2-2025 is the Chinese standard "Aluminium alloy power cables with extruded insulation for rated voltages from 1 kV up to 35 kV - Part 2: Cables for rated voltages from 6 kV up to 30 kV".
Its scope clause reads: This document specifies the specifications for aluminum alloy core extruded insulated power cables with rated voltages from 6kV (Um=7.2kV) to 30kV (Um=36kV).
Voltage markings and materials, product naming, conductors, insulation, shielding, cable core, inner lining and filler, metal layer, outer sheath, inspection rules, markings, The labeling and accompanying documentation, packaging, transportation and storage requirements describe the corresponding test methods.
This document applies to fixed installations in power distribution networks or industrial facilities with rated voltages from 6kV (Um=7.2kV) to 30kV (Um= 36kV aluminum alloy core extruded insulated power cable.
This document does not apply to cables under special installation and operating conditions, such as overhead cables, mining industry cables, and nuclear power plants (within containment and surrounding areas). (Near) and underwater or ship cables.
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Document preview — GB/T 31840.2-2025
National Standard of the People's Republic of China
- ICS
- 29.060.20
- Classification
- K 13
- Replacing
- GB/T 31840.2-2015
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Preface
- Introduction
- 1.Scope
- 2 Normative References
- 3 Terms and Definitions
- 4.Voltage markings and materials
- 5.Product Naming
- 6.Conductor 7.
- 7.Insulation 8.
- 8 Block
- 10 Metal layers
- 11 Outer sheath
- 12 Testing and Judgment
- 13 Inspection Rule
- 14.Marks, labels, and accompanying documents
- 15 Packaging, transportation and storage
- Appendix A (Normative) Assumptions and Calculation Methods for Determining Sheath Dimensions
- Appendix B (Normative) Numerical Rounding
- Appendix C (Normative) Special Performance Tests for Interlocking Armor
1 Scope
This document specifies the specifications for aluminum alloy core extruded insulated power cables with rated voltages from 6kV (Um=7.2kV) to 30kV (Um=36kV).
Voltage markings and materials, product naming, conductors, insulation, shielding, cable core, inner lining and filler, metal layer, outer sheath, inspection rules, markings,
The labeling and accompanying documentation, packaging, transportation and storage requirements describe the corresponding test methods.
This document applies to fixed installations in power distribution networks or industrial facilities with rated voltages from 6kV (Um=7.2kV) to 30kV (Um=
36kV aluminum alloy core extruded insulated power cable.
This document does not apply to cables under special installation and operating conditions, such as overhead cables, mining industry cables, and nuclear power plants (within containment and surrounding areas).
(Near) and underwater or ship cables.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 2951.11-2008 General Test Methods for Insulation and Sheath Materials of Cables and Optical Fibers - Part 11.General Test Methods
Methods --- Thickness and Dimensional Measurement --- Mechanical Property Testing
GB/T 2951.12-2008 General Test Methods for Insulation and Sheath Materials of Cables and Optical Fibers - Part 12.General Test Methods
Method---Thermal Aging Test
GB/T 2951.13-2008 General Test Methods for Insulation and Sheath Materials of Cables and Optical Fibers - Part 13.General Test Methods
Methods for determining density. water absorption test, shrinkage test.
GB/T 2951.14-2008 General Test Methods for Insulation and Sheath Materials of Cables and Optical Fibers - Part 14.General Test Methods
Method---Low Temperature Test
GB/T 2951.21-2008 General Test Methods for Insulation and Sheath Materials of Cables and Optical Fibers - Part 21.Elastomer Compounds
Test methods. ozone resistance test, heat stretching test, mineral oil immersion test.
GB/T 2951.31-2008 General Test Methods for Insulation and Sheath Materials of Cables and Optical Fibers - Part 31.Polyvinyl Chloride Blends
Specialized test methods---High temperature pressure test---Crack resistance test
GB/T 2951.32-2008 General Test Methods for Insulation and Sheath Materials of Cables and Optical Fibers - Part 32.Polyvinyl Chloride Blends
Specialized test methods --- weight loss test --- thermal stability test
GB/T 2951.41-2008 General Test Methods for Insulation and Sheath Materials of Cables and Optical Fibers - Part 41.Polyethylene and Polypropylene
Special test methods for mixtures. environmental stress cracking test, melt index measurement method, direct combustion method for measuring carbon black and...
(or) Thermogravimetric analysis (TGA) to measure carbon black content; microscopic assessment of carbon black dispersion in polyethylene.
GB/T 3048.4 Electrical Performance Test Methods for Wires and Cables - Part 4.DC Resistance Test of Conductors
GB/T 3048.10 Electrical Performance Test Methods for Wires and Cables - Part 10.Spark Test for Extruded Sheaths
GB/T 31489.4 | GB/T 33594 | GB/T 31489.1 | GB/T 31840.3 | GB/T 31840.1 | GB/T 31840.3 | […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 48 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 2951.11-2008Common test methods for insulating and sheathing materials of electric and optical cables -- Part 11: Methods for general application -- Measurement of thickness and overall dimensions -- Tests for determining the mechanical properties
- GB/T 2951.12-2008Common test methods for insulating and sheathing materials of electric and optical cables -- Part 12: Methods for general application -- Thermal ageing methods
- GB/T 2951.13-2008Common test methods for insulating and sheathing materials of electric and optical cables -- Part 13: Methods for general application -- Measurement for determining the density -- Water absorption tests -- Shrinkage test
- GB/T 2951.14-2008Common test methods for insulating and sheathing materials of electric and optical cables -- Part 14: Methods for general application -- Test at low temperature
- GB/T 2951.21-2008Common test methods for insulating and sheathing materials of electric and optical cables -- Part 21: Methods specific to elastomeric compounds -- Ozone resistance, hot set and mineral oil immersion tests
- GB/T 2951.31-2008Common test methods for insulating and sheathing materials of electric and optical cables -- Part 31: Methods specific to PVC compounds -- Pressure test at high temperature -- Test for resistance to cracking
Editions of GB/T 31840.2
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 31840.2-2025 | Aluminum alloys power cables with extruded insulation for rated voltages from 1 kV(Um=1.2 kV) up to 35 kV(Um=40.5 kV) - Part 2: Cables for rated voltages from 6 kV(Um=7.2 kV)up to 30 kV(Um=36 kV) | current edition | Current |
| GB/T 31840.2-2015 | Aluminum alloys power cables with extruded insulation for rated voltages from 1 kV (Um=1.2 kV) up to 35 kV (Um=40.5 kV) -- Part 2: Cables for rated voltages from 6 kV (Um=7.2 kV) up to 30 kV (Um=36 kV) | previous edition | In force |
This page sells the current edition, GB/T 31840.2-2025. Earlier editions are listed for reference only.
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Related Standards
GB/T 2951.11-2008 — Common test methods for insulating and sheathing materials of electric and optical cables -- Part 11: Methods for general application -- Measurement of thickness and overall dimensions -- Tests for determining the mechanical properties
GB/T 2951.12-2008 — Common test methods for insulating and sheathing materials of electric and optical cables -- Part 12: Methods for general application -- Thermal ageing methods
GB/T 2951.13-2008 — Common test methods for insulating and sheathing materials of electric and optical cables -- Part 13: Methods for general application -- Measurement for determining the density -- Water absorption tests -- Shrinkage test
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