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GB/T 46382-2025Test methods for conductors for overhead transmission lines (English PDF)

架空输电线路用导线试验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 31, 2025

Implementation date

May 1, 2026

Scope

GB/T 46382-2025 is the English-translated version of 架空输电线路用导线试验方法.

GB/T 46382-2025 is the Chinese standard "Test methods for conductors for overhead transmission lines". Its scope clause reads: This document specifies the general test rules for the common test methods of conductors used in overhead transmission lines, and describes structural, dimensional, and mechanical performance tests.

Methods for testing electrical performance and thermal performance. This document applies to the structure, dimensions, mechanical properties, and electrical properties of conductors (hereinafter referred to as stranded wires) used in overhead transmission lines.

Gas and thermal performance testing. For specific overhead conductor products, select the test items specified in this document according to the relevant product standards.

Choose the appropriate experimental method. Its clauses include terms and definitions.

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Document preview — GB/T 46382-2025

National Standard of the People's Republic of China

ICS: 29.060.10
Classification: K 11

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Abbreviations
5.General Rules for Testing
5.1 Test Principles
5.2 Sampling Principles
5.3 Test Item
6.Structural and dimensional tests
6.1 Twisted wire diameter
6.2 Cross-sectional area of stranded wire
6.3 Stranded Wire Structure
6.4 Twisted wire pitch ratio
6.5 Mass per unit length of stranded wire
6.6 Tightness and flatness test of stranded wire
6.7 Stranded Wire Drag Coefficient Test
7 Mechanical property test
7.1 Stranded wire breaking force test
7.2 High-Temperature Tensile Strength Test of Stranded Wire
7.3 Strength-strain and elastic modulus test of stranded wire
7.4 Stranded Wire Pulley Test
7.5 Stranded wire torsion/torque test
7.6 Stranded Wire Laying-Out Test
7.7 Stranded wire flattening test
7.8 Stranded wire galloping test
8 Electrical performance test
8.1 Stranded Wire DC Resistance Test
8.2 Stranded Wire AC Resistance and Current Carrying Capacity Test
8.3 Stranded wire corona and radio interference test
8.4 Stranded Wire Short-Circuit Current Test
8.5 Stranded Wire Lightning Strike Test
9 Thermal performance test
9.1 Stranded Wire Linear Expansion Coefficient Test
9.2 Stranded Wire Sag Characteristic Test
9.3 Long-term heat resistance test of stranded wire
9.4 Thermal aging test of stranded wire materials

1 Scope

This document specifies the general test rules for the common test methods of conductors used in overhead transmission lines, and describes structural, dimensional, and mechanical performance tests.

Methods for testing electrical performance and thermal performance.

This document applies to the structure, dimensions, mechanical properties, and electrical properties of conductors (hereinafter referred to as stranded wires) used in overhead transmission lines.

Gas and thermal performance testing. For specific overhead conductor products, select the test items specified in this document according to the relevant product standards.

Choose the appropriate experimental method.

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 1179 Concentric Stranded Round Conductors

GB/T 1216 Outside Micrometer

GB/T 2314 General Technical Requirements for Power Fittings

GB/T 2317.2 Test methods for electrical fittings - Part 2.Corona and radio interference tests

GB/T 2900.51 Electrical Engineering Terminology - Overhead Lines

GB/T 3048.2 Electrical performance test methods for wires and cables - Part 2.Resistivity test for metallic materials

GB/T 3048.4 Electrical Performance Test Methods for Wires and Cables - Part 4.DC Resistance Test of Conductors

GB/T 4909.2 Bare wires - Test methods - Part 2.Dimensional measurement

GB/T 4909.3 Bare wires - Test methods - Part 3.Tensile test

GB/T 6091 Knife-edge straight ruler

GB/T 9056 Metal Ruler

GB/T 20141 Type Concentric Stranded Overhead Conductor

GB/T 21389 Vernier, dial indicator and digital calipers

GB/T 22523 Feeler gauge

GB/T 36551 Calculation Method for Performance of Concentric Stranded Overhead Conductors

DL/T 371-2019 Overhead Transmission Line Cable Laying Trolley

DL/T 832-2016 Fiber Optic Composite Overhead Ground Wire

3 Terms and Definitions

The terms and definitions defined in GB/T 1179, GB/T 2900.51 and GB/T 20141, as well as the following terms and definitions, apply to this document.

3.1

The operating temperature at which the conductor can operate stably for a long time without significant performance degradation.

GB/T 5585.2 | GB/T 36102 | GB/T 30552 | GB/T 29324 | GB/T 17937 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 41 pages — is available in the English PDF.

Referenced standards

Normative references

Editions of GB/T 46382

Edition	Title	Revision	Status
GB/T 46382-2025	Test methods for conductors for overhead transmission lines	current edition	Current

This page sells the current edition, GB/T 46382-2025. Earlier editions are listed for reference only.

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