GB/T 31840.2-2025 Active National standards

GB/T 31840.2-2025 Aluminum alloys power cable 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)

GB/T 31840.2-2025 Aluminum alloys power cable 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)

Publish Date: 2025-10-05 Implement Date: 2026-02-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 31840.2-2025
Standard Type: National standards
Standard Status: Active
is_force_gb: no
CCS Name: Cables and their accessories
ICS Name: Cable
Publish Date: 2025-10-05
Implement Date: 2026-02-01
Pages: 60 pages

Scope

This document specifies the voltage marking and materials, product naming, conductors, insulation, shielding, cable cores, inner sheaths and fillers, metal layers, outer sheaths, inspection rules, marking, labeling, and accompanying documents, as well as packaging, transportation, and storage requirements for aluminum alloy core extruded insulated power cables with a rated voltage of 6 kV (Um = 7.2 kV) to 30 kV (Um = 36 kV). It also describes the corresponding test methods.
This document applies to fixed-installation rated voltage aluminum alloy core extruded insulated power cables of 6 kV (Um = 7.2 kV) to 30 kV (Um = 36 kV) used in power distribution networks or industrial installations.
This document does not apply to cables subject to special installation and operating conditions, such as overhead cables, mining industries, nuclear power plants (inside and near the containment vessel), and underwater or shipboard cables.

Development Information

Word Count: 94 Thousand words Pages: 60 pages

Same series standard

Replace the following standards

Referenced 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 GB/T 2951.14-2008 Common test methods for insulating and sheathing materials of electric and optical cables—Part 14:Methods for general application—Test at low temperature GB/T 2951.21-2008 Common 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 2951.31-2008 Common 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 GB/T 2951.32-2008 Common test methods for insulating and sheathing materials of electric and optical cables—Part 32:Methods specific to PVC compounds—Loss of mass test—Thermal stability test GB/T 2951.41-2008 Common test methods for insulating and sheathing materials of electric and optical cables—Part 41:Methods specific to polyethylene and polypropylene compounds—Resistance to environmental stress cracking—Measurement of the melt flow index—Carbon black and/or mineral filler content measurement in polyethylene by direct combustion—Measurement of carbon black content by thermo gravimetric analysis(TGA)—Assessment of carbon black dispersion in polyethylene using a microscope GB/T 3048.4-1994 Test methods for determining electrical properties of electric cables and wires Measurement of D.C. resistance of conductors GB/T 3048.4-2007 Test methods for electrical properties of electric cables and wires—Part 4:Test of DC resistance of conductors GB/T 3048.4-2025 Test methods for electrical properties of electric cables and wires—Part 4:Test of DC resistance of conductors GB/T 3048.10-1994 Test methods for determining electrical properties of electric cables and wires Spark of extruded anti-corrosion protective sheaths GB/T 3048.10-2007 Test methods for electrical properties of electric cables and wires—Part 10:Spark test of extruded protective sheaths GB/T 3048.12-1994 Test methods for determining electrical properties of electric cables and wires Partial discharge test GB/T 3048.12-2007 Test methods for electrical properties of electric cables and wires—Part 12:Partial discharge test GB/T 3048.12-2025 Test methods for electrical properties of electric cables and wires—Part 12:Partial discharge test GB/T 3048.13-2007 Test methods for electrical properties of electric cables and wires—Part 13:Impulse voltage test GB/T 3956-2008 Conductors of insulated cables GB/T 4909.2-2009 Test methods for bare wires—Part 2:Measurement of dimensions GB/T 4909.3-1985 Test methods for bare wires—Tensile test GB/T 4909.3-2009 Test methods for bare wires—Part 3:Tensile test GB/T 4909.5-1985 Test methods for bare wires—Bend test—Reverse bend test GB/T 4909.5-2009 Test methods for bare wires—Part 5:Bend test—Reverse bend test GB 6995.3-1986 Markings for electric cables and wires Part 3:Identifications of cables and wires GB/T 6995.3-2008 Markings for electric wires and cables—Part 3:Identifications of cables and wires GB 6995.5-1986 Markings for electric cables and wires Part 5:Identifications of insulated cores of power cables GB/T 6995.5-2008 Markings for electric wires and cables—Part 5:Identifications of insulated cores of power cables GB/T 7113.2-2005 Flexible insulating sleeving—Methods of test GB/T 7113.2-2014 Flexible insulating sleeving—Part 2:Methods of test GB/T 7999-2000 Standard method for direct reading spectromertric analysis of aluminum and its alloys GB/T 7999-2007 Optical emission spectrometric analysis method of aluminum and aluminum alloys GB/T 7999-2015 Optical emission spectrometric analysis method of aluminum and aluminum alloys GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 9327-2008 Compression and mechanical connectors for power cables for rated voltages up to 35 kV(Um=40.5 kV)—Test methods and requirements GB/T 11017.2-2024 Power cables with cross-linked polyethylene insulation and their accessories for rated voltage of 66 kV(Um=72.5 kV) and 110 kV (Um=126 kV)—Part 2:Power cables GB/T 11091-2005 Copper strips for cables GB/T 11091-2014 Copper strip for cables GB/T 11091-2024 Copper strip and foil for cables GB/T 12706.2-2020 Power cables with extruded insulation and their accessories 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) GB/T 16927.1-1997 High-voltage test techniques Part 1:General test requirements GB/T 16927.1-2011 High-voltage test techniques—Part 1:General definitions and test requirements GB/T 17650.1-1998 Test on gases evolved during combustion of materials from cables Part 1:Determination of the amount of halogen acid gas GB/T 17650.1-2021 Test on gases evolved during combustion of materials from cables or optical fiber cables—Part 1:Determination of the halogen acid gas content GB/T 17650.2-1998 Test on gases evolved during combustion of materials from cables Part 2:Determination of degree of acidity of gases by measuring pH and conductivity GB/T 17650.2-2021 Test on gases evolved during combustion of materials from cables or optical fiber cables—Part 2:Determination of acidity (by pH measurement) and conductivity GB/T 17651.2-1998 Measurement of smoke density of cables burning under defined conditions Part 2:Test procedure and requirements GB/T 17651.2-2021 Measurement of smoke density of cables or optical fiber cables burning under defined conditions—Part 2:Test procedure and requirements GB/T 18380.11-2008 Tests on electric and optical fibre cables under fire conditions—Part 11:Test for vertical flame propagation for a single insulated wire or cable—Apparatus GB/T 18380.11-2022 Tests on electric and optical fibre cables under fire conditions—Part 11:Test for vertical flame propagation for a single insulated wire or cable—Apparatus

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