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GB/T 11017.1-2024Power 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 1: Test methods and requirements (English PDF)

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

September 29, 2024

Implementation date

April 1, 2025

Scope

GB/T 11017.1-2024 (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 1: Test methods and requirements) is available as an English-translated PDF.

GB/T 11017.1-2024 — This document describes the cross-linked polyethylene insulated power cable system, cable body and the test methods for the accessories themselves are specified and the corresponding requirements are stipulated.

This document is applicable to the testing of cables and their accessories used under normal installation and operation conditions, but not to the testing of cables and their accessories used under special conditions.

Tests on cables and their accessories, such as submarine cables and transition joints between cross-linked polyethylene insulated cables and paper insulated cables.

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Document preview — GB/T 11017.1-2024

National Standard of the People's Republic of China

ICS: 29.060.20
Classification: K 13
Replacing: GB/T 11017.1-2014

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
Introduction
1 Scope
2 Normative references
3 Terms and Definitions
4 Voltage marking, materials and numerical value rounding
5 Cable water blocking measures
6 Cable characteristics
7 Accessory features
8 Test conditions
9 Routine tests for cables and accessories
10 Sampling test of cables
11 Sampling test of accessories
12 Type testing of cable systems
13 Pre-qualification test of cable system
14 Type test of cable
15 Type test of accessories
16 Electrical test after installation (field test)
Appendix A (Informative) Comparison of changes in structure numbers between this document and IEC 60840:2023
Appendix B (Informative) Technical differences between this document and IEC 60840:2023 and their causes
Appendix C (Normative) Numerical rounding
Appendix D (Normative) Additional tests for the annex
Appendix E (Informative) Determination of Cable Conductor Temperature
Appendix F (Informative) List of type tests, prequalification tests and extended prequalification tests for cable systems, cables and accessories
Appendix G (normative) Tests for cable assemblies having longitudinally wrapped metal tape or longitudinally wrapped metal foil bonded to the outer sheath
Appendix H (Informative) Guidelines for interruption and effectiveness judgment of voltage thermal cycle test in type test
Appendix I (Normative) Semi-conductive shield resistivity measurement method
Appendix J (Normative) Test for protrusions at the interface between micropores, impurities and semi-conductive shielding layer
Appendix K (Normative) Method for determining the weighted value of halogen content of non-metallic materials in cables
Appendix L (Normative) Water penetration test
Appendix M (Normative) Conductor water penetration test
Reference
Figure 1 Example of test arrangement for prequalification test
Figure 2 Example of an extended prequalification test arrangement for a system using additional connectors designed for both flexible and rigid installation
Figure E.1 Typical layout of reference circuit and test circuit
Figure E.2 Example of arrangement of temperature sensors on reference return conductors
Figure G.1 Metal foil or metal tape bonding strength test
Figure G.2 Example of metal foil overlap
Figure G.3 Peel strength test of metal foil overlap
Figure G.4 Typical curve of tension and clamp spacing (1)
Figure G.5 Typical curve of tension and clamp spacing (2)
Figure I.1 Sample preparation for conductor shield and insulation shield volume resistivity measurement
Figure L.1 Schematic diagram of water penetration test device
Figure M.1 Schematic diagram of conductor water penetration test device
Table 1 Insulation mixture for cables
Table 2 Non-metallic outer sheath mixture of cables
Table 3 Tandelta 6 of insulation materials
Table 4 Test voltage
Table 5 Cantilever working load of outdoor terminal bushing
Table 6 Special performance test requirements for cable XLPE insulation mixtures
Table 7 Summary of non-electrical type test items for cable components and finished cables
Table 8 Mechanical properties test requirements for cable XLPE insulation mixture (before and after aging)
Table 9 Mechanical properties test requirements of cable outer sheath mixture (before and after aging)
Table 10 Special performance test requirements for cable outer sheath materials
Table 11 Combustion characteristics test requirements
Table A.1 Comparison of structure numbers between this document and IEC 60840:2023
Table B.1 Technical differences between this document and IEC 60840:2023 and their causes
Table C.1 Rounding digits of specified values, measured values or their calculated values
Table D.1 Test sequence
Table D.2 Lightning impulse between the shield and ground of straight-through joints, insulating joints and accessories with cable shield disconnection structure and/or grounding structure
Voltage test
Table D.3 Lightning impulse voltage between the shields of insulating joints and the two ends of the enclosure with cable shield disconnection structure and/or grounding structure
Test
Table D.4 Lightning impulse voltage test for metal sheath disconnecting insulation terminals
Table F.1 Type tests for cable systems, cables and accessories
Table F.2 Calculated electric field strength on conductor shield is higher than 8.0 kV/mm or calculated electric field strength on insulation shield is higher than 4.0 kV/mm
Prequalification test of cable system
Table F.3 Calculated electric field strength on conductor shield is higher than 8.0 kV/mm or calculated electric field strength on insulation shield is higher than 4.0 kV/mm
Prequalification extended test of cable system
Table G.1 Bond strength or peel strength requirements

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document is GB/T 11017 "Rated voltage 66kV (Um=72.5kV) and 110kV (Um=126kV) cross-linked polyethylene insulation Power cables and their accessories" Part 1: GB/T 11017 has published the following parts.

--- Part 1: Test methods and requirements;

--- Part 2: Cables;

--- Part 3: Cable accessories.

This document replaces GB/T 11017.1-2014 "Rated voltage 110kV (Um=126kV) cross-linked polyethylene insulated power cables and their Annex Part 1: Test methods and requirements, compared with GB/T 11017.1-2014, in addition to structural adjustments and editorial changes, the main the technical changes are as follows.

--- Added the scope of application and requirements of 66kV cable system (see Chapter 1);

--- Deleted ST1 and ST3 outer sheath materials and corresponding requirements (see 4.4, Table 2 and Table 5 of the 2014 edition);

--- Added ST12 and corresponding requirements (see 4.4, Table 2, Table 7, Table 9, Table 10 and Table 11);

--- Added numerical rounding provisions (see 4.5 and Appendix C);

--- Changed the requirements for accessory characteristics (see Chapter 7, Chapter 7 of the 2014 edition);

--- Added the test voltage requirements corresponding to 66kV (see Table 4);

--- Changed the routine test requirements of the annex (see 9.1, 9.1 of the 2014 edition);

--- Added the metal strip thickness test and requirements for combined (CD) design (see 10.7.4);

--- Changed the applicable scope of measurement of carbon black content of black PE outer sheath (see 12.5.13, 12.5.12 of the 2014 edition);

--- Added the test methods and requirements for the burning characteristics of cables (see 12.5.14);

--- Added conductor penetration test methods and requirements (see 12.5.15 and Appendix M);

--- Added water absorption test and requirements for the outer sheath (see 12.5.21 and Table 10);

--- Changed the requirements for accessory type testing (see Chapter 15, Chapter 15 of the 2014 edition);

---Added additional tests for accessories (see Appendix D);

--- Changed the cable length for water penetration test (see Appendix L, Appendix E of the 2014 edition);

--- Added the method for determining the weighted value of the halogen content of non-metallic materials in cables (see Appendix K).

This document is modified to adopt IEC 60840:2023 "Rated voltage greater than 30kV (Um=36kV) to 150kV (Um=170kV) Test methods and requirements for insulated power cables and their accessories.

Compared with IEC 60840:2023, this document has many structural adjustments. Comparison table of structural number changes between the two documents See Appendix A.

This document has many technical differences compared to IEC 60840:2023.

A single line (|) is used to indicate the differences. A list of technical differences and their causes is given in Appendix B.

The following editorial changes were made to this document.

--- In order to adapt to my country's technical standard system, the standard name is changed to "Rated voltage 66kV (Um=72.5kV) and 110kV (Um= 126kV) cross-linked polyethylene insulated power cables and their accessories Part 1: Test methods and requirements";

--- Deleted Appendix J (informative).

Introduction

Rated voltage 66kV and 110kV power cables are widely used in power transmission networks, in urban power grids, large enterprises, and new energy power generation.

GB/T 11017 is a product standard for power cables and accessories with rated voltages of 66kV and 110kV.

The naming rules, test methods, technical requirements, etc. of power cables and accessory systems are planned to be composed of three parts.

--- Part 1: Test methods and requirements. The purpose is to specify the general Requirements for test methods and procedures.

--- Part 2: Cables. The purpose is to unify the classification, naming, structure and technical specifications of power cables with rated voltages of 66 kV and 110 kV.

Technical requirements.

--- Part 3: Cable accessories. The purpose is to unify the classification, naming, Structural and technical requirements.

Rated voltage 66kV (Um=72.5kV) and 110kV (Um=126kV) Cross-linked polyethylene insulated power cable and its annexes Part 1: Test methods and requirements

1 Scope

This document describes the cross-linked polyethylene insulated power cable system, cable body and the test methods for the accessories themselves are specified and the corresponding requirements are stipulated.

Tests on cables and their accessories, such as submarine cables and transition joints between cross-linked polyethylene insulated cables and paper insulated cables.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document.

GB/T 2951.11-2008 General test methods for insulating and sheathing materials of electrical and optical cables Part 11: General test methods Thickness and dimensional measurement Mechanical properties test (IEC 60811-1-1:2001, IDT) GB/T 2951.12-2008 General test methods for insulating and sheathing materials of electrical and optical cables Part 12: General test methods Thermal aging test method (IEC 60811-1-2:2000, IDT) GB/T 2951.13-2008 General test methods for insulating and sheathing materials of electrical and optical cables Part 13: General test methods Density determination method Water absorption test Shrinkage test (IEC 60811-1-3:2001, IDT) GB/T 2951.14-2008 General test methods for insulating and sheathing materials of electrical and optical cables Part 14: General test methods Low temperature test (IEC 60811-1-4:1985, IDT) GB/T 2951.21-2008 General test methods for insulating and sheathing materials of electric and optical cables Part 21: Special test methods for elastomeric mixtures Test methods Ozone resistance test Heat extension test Mineral oil immersion test (IEC 60811-2-1:2001, IDT) GB/T 2951.31-2008 General test methods for insulating and sheathing materials of electric and optical cables Part 31: Polyvinyl chloride mixtures Special test methods High temperature pressure test Cracking resistance test (IEC 60811-3-1:1985, IDT) GB/T 2951.32-2008 General test methods for insulating and sheathing materials of electric and optical cables Part 32: Polyvinyl chloride mixtures Special test methods Weight loss test Thermal stability test (IEC 60811-3-2:1985, IDT) GB/T 2951.41-2008 General test methods for insulating and sheathing materials of electric and optical cables Part 41: Polyethylene and polypropylene Special test methods for mixtures Environmental stress cracking resistance test Melt index measurement method Direct combustion method for measuring carbon black and (or) Mineral filler content Thermogravimetric analysis (TGA) to measure carbon black content Microscopy to evaluate the dispersion of carbon black in polyethylene (IEC 60811-4-1:2004, IDT) GB/T 3048.12 Electrical properties test methods for wires and cables Part 12: Partial discharge test (GB/T 3048.12-2007, IEC 60885-3:1988, MOD) GB/T 3048.13 Electrical properties test methods for wires and cables Part 13: Impulse voltage test (GB/T 3048.13-2007, IEC 60230:1966, MOD)

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 66 pages — is available in the English PDF.

Referenced standards

Normative references

IEC 60811 · GB/T 2951.12-2008 · GB/T 2951.13-2008 · GB/T 2951.14-2008 · GB/T 2951.31-2008 · GB/T 2951.32-2008 · GB/T 2951.41-2008 · GB/T 3048.12 · GB/T 3048.12-2007 · IEC 60885 · IEC 60230

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