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GB/T 12971.2-2023 English PDF

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GB/T 12971.2-2023: Trolley and contact wires for electric traction - Part 2: Aluminium and steel composite contact wires
Status: Valid

GB/T 12971.2: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 12971.2-2023English349 Add to Cart 4 days [Need to translate] Trolley and contact wires for electric traction - Part 2: Aluminium and steel composite contact wires Valid GB/T 12971.2-2023
GB/T 12971.2-2008English150 Add to Cart 0--9 seconds. Auto-delivery Trolley and contact wires for electric traction -- Part 2: Aluminium and steel composite trolley and contact wires Obsolete GB/T 12971.2-2008
GB 12971.2-1991English199 Add to Cart 2 days [Need to translate] Trolley and contact wires for electric traction--Part 2: Copper trolley and contact wires Obsolete GB 12971.2-1991

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Basic data

Standard ID GB/T 12971.2-2023 (GB/T12971.2-2023)
Description (Translated English) Trolley and contact wires for electric traction - Part 2: Aluminium and steel composite contact wires
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard K11
Classification of International Standard 29.060.10
Word Count Estimation 18,138
Date of Issue 2023-08-06
Date of Implementation 2024-03-01
Older Standard (superseded by this standard) GB/T 12971.2-2008
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 12971.2-2023: Trolley and contact wires for electric traction - Part 2: Aluminium and steel composite contact wires


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 29.060.10 CCSK11 National Standards of People's Republic of China Replace GB/T 12971.2-2008 Contact wire for electric traction Part 2.Steel and aluminum composite contact wires Published on 2023-08-06 2024-03-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Table of contents

PrefaceⅠ Introduction II 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 Model, specification and representation method 1 5 Technical requirements 2 6 Test method 5 7 Acceptance Rules 6 8 Packaging and Logo6 9 Storage and transportation 7 Appendix A (informative) Calculated wear value of steel-aluminum composite contact line 8 Appendix B (normative) Technical requirements for semi-finished steel profiles 10 Appendix C (normative) Technical requirements for aluminum semi-finished products 11 Appendix D (Normative) Test Method for Bonding Strength of Steel-Aluminum Composite Contact Wire 12 Reference 14 Figure 1 Schematic diagram of cross-sectional shape of steel-aluminum composite contact line 3 Figure A.1 Schematic diagram of the lower half of the steel-aluminum composite contact line 8 Figure D.1 Schematic diagram of CGLN type contact line bonding force test specimen preparation 12 Figure D.2 Schematic diagram of preparation of CGLW215 and CGLW173 contact line bonding force test specimens 13 Figure D.3 Schematic diagram of CGLW104 contact line bonding force test specimen preparation 13 Table 1 Steel-aluminum composite contact wire model 2 Table 2 Steel-aluminum composite contact wire specifications 2 Table 3 Dimensions, angles, mass per unit length and deviation of steel-aluminum composite contact lines 3 Table 4 Comprehensive breaking force, bonding force and DC resistance of steel-aluminum composite contact wire at 20℃4 Table 5 Inspection Item 6 Table A.1 Nominal value of the cross-sectional area of the lower half of the steel-aluminum composite contact line 9 Table A.2 Cross-sectional area of steel and aluminum corresponding to wear height of steel-aluminum composite contact line 9 Table B.1 Chemical composition of steel profiles10

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document is Part 2 of GB/T 12971 "Contact Wires for Electric Traction". GB/T 12971 has released the following parts. ---Part 1.Copper and copper alloy contact wires; ---Part 2.Steel-aluminum composite contact wire. This document replaces GB/T 12971.2-2008 "Contact wires for electric traction - Part 2.Steel and aluminum composite contact wires" and is consistent with Compared with GB/T 12971.2-2008, in addition to structural adjustments and editorial changes, the main technical changes are as follows. ---Added terms and definitions (see Chapter 3); ---Added exposed steel CGLW104 specifications and related technical requirements (see 4.2 and Chapter 5); ---Changed the nominal cross-sectional area of steel and aluminum corresponding to some models and specifications of steel-aluminum composite contact wires (see 4.2, Chapter 4 of the.2008 edition); ---Added some dimensions and deviation requirements for steel-aluminum composite contact lines (see 5.2); ---Added the unit length quality requirements and test methods of steel-aluminum composite contact wires (see 5.2 and 6.2); ---Changed the bonding strength requirements of steel-aluminum composite contact wires (see 5.3, 6.2.2 of the.2008 edition); ---Changed the torsion requirements and test methods of some models of steel-aluminum composite contact wires (see 5.4 and 6.6, 6.2.3 of the.2008 edition); --- Added requirements for straightness of steel-aluminum composite contact lines for electrified railways and their test methods (see 5.5 and 6.7); ---Deleted the manufacturing length requirements for steel-aluminum composite contact wires, and changed the joint requirements for some models and specifications of steel-aluminum composite contact wires (see 5.6,.2008 version of 6.3.3); ---Added the calculated value of steel-aluminum composite contact line wear (see Appendix A); ---Changed the technical requirements for steel profile semi-finished products and aluminum semi-finished products (see Appendix B and Appendix C, Appendix A and Appendix A of the.2008 edition Appendix B); ---The test method for the bonding strength of steel-aluminum composite contact lines has been changed (see Appendix D, Appendix C of the.2008 edition). Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by the China Electrical Equipment Industry Association. This document is under the jurisdiction of the National Bare Wire Standardization Technical Committee (SAC/TC422). This document was drafted by. Shanghai Cable Research Institute Co., Ltd., Shanghai National Cable Testing Co., Ltd., Hebei Xingtai Cable Co., Ltd. Company, Tai'an Tram Line Factory, Standards and Metrology Institute of China Academy of Railway Sciences Group Co., Ltd., Inner Mongolia Yitai-Huaihe Railway Co., Ltd. company. The main drafters of this document. Zhang Yongjia, Cai Xichuan, Ding Zhenpei, Su Huaguang, Meng Guangji, Liang Xiangyang, Yang Caizhi, Xu Wei. The previous versions of this document and the documents it replaces are as follows. ---First released in.1991 as GB 12971.1-1991, GB 12971.3-1991; ---The first revision was GB/T 12971.2-2008 in.2008; ---This is the second revision.

Introduction

Steel-aluminum composite contact wires for electric traction are key material components for electrical transportation and lifting systems such as railways, urban transportation, industrial and mining, etc. for In order to improve the technical applicability of this document, through technical consultation, industry research, experimental verification and other forms, this revision mainly modifies and adds The model specifications and technical requirements of the inner-wrapped steel-aluminum composite contact wire and the exposed steel-steel-aluminum composite contact wire have been changed and the bonding force has been changed and increased. and flatness test methods, adding typical calculation values of wear to reflect the current technological development and manufacturing of steel-aluminum composite contact wires for electric traction in my country. Especially during use, the cross-sectional area of steel and aluminum changes due to wear of the steel-aluminum composite contact line, which directly affects the safety of its service. Safety and economy to meet practical needs such as circuit design, use and maintenance. GB/T 12971 "Contact Wires for Electric Traction" is intended to consist of two parts. ---Part 1.Copper and copper alloy contact wires. The purpose is to conduct technical requirements and test methods for copper and copper alloy contact wires. Regulation. ---Part 2.Steel-aluminum composite contact wire. The purpose is to stipulate the technical requirements and test methods for steel-aluminum composite contact wires. Contact wire for electric traction Part 2.Steel and aluminum composite contact wires

1 Scope

This document stipulates the models, specifications and representation methods, technical requirements, test methods, and acceptance regulations of steel-aluminum composite contact wires for electric traction. rules, packaging and marking, storage and transportation, etc. This document is applicable to the manufacturing of steel-aluminum composite contact wires for electric traction such as railways, urban transportation, industrial and mining, and other electrical transportation and lifting systems. Detection and application, etc.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document. GB/T 3048.2 Test methods for electrical properties of wires and cables Part 2.Resistivity test of metallic materials GB/T 3190-2020 Chemical composition of deformed aluminum and aluminum alloys GB/T 4067 Determination of resistance temperature characteristic parameters of metallic materials GB/T 4909.2 Test methods for bare wires Part 2.Dimensional measurement GB/T 4909.3 Test methods for bare wires Part 3.Tensile test GB/T 4909.4 Test methods for bare wires Part 4.Torsion test GB/T 9056-2004 Metal ruler GB/T 12971.1-2023 Contact wires for electric traction Part 1.Copper and copper alloy contact wires GB/T 26497-2011 Electronic balance JB/T 8137.2 Wire and cable delivery pallet Part 2.All-wood structure delivery pallet JB/T 8137.4 Wire and cable delivery pallet Part 4.Steel composite structure delivery pallet

3 Terms and definitions

The terms and definitions defined in GB/T 3048.2, GB/T 4909.2, GB/T 4909.3 and the following apply to this document. 3.1 adhesion Apply tensile force to the steel core and aluminum layer of the steel-aluminum composite contact line respectively over the specified length. As the tensile force increases, the steel core and aluminum layer begin to produce The pulling force when relative displacement occurs. 4 Models, specifications and representation methods 4.1 Model The steel-aluminum composite contact wire model consists of the contact wire code, material code and structure code, see Table 1.

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