SIST EN IEC 62641:2023

Conductors for overhead lines - Aluminium and aluminium alloy wires for concentric lay stranded conductors (IEC 62641:2022)

This document specifies the mechanical and electrical properties of round and formed wires for
equivalent diameters up to the values according to Table 3 for aluminium and aluminium alloys
and according to Table 4 for thermal resistant alloys. This document is applicable to aluminium
and aluminium alloy wires for the manufacture of concentric lay overhead electrical stranded
conductors with or without gap(s) for power transmission purposes.
The various materials and their designations are listed in Table 1. For calculation purposes, the
values listed in Table 1 are used.

Leiter für Freileitungen - Drähte aus Aluminium und Aluminiumlegierung für Leiter aus konzentrisch verseilten Drähten (IEC 62641:2022)

Conducteurs pour lignes aériennes - Fils d'aluminium et en alliage d'aluminium pour conducteurs toronnés à couches concentriques (IEC 62641:2022)

La CEI 62641:2022 spécifie les propriétés mécaniques et électriques des fils ronds et de forme pour des diamètres équivalents jusqu’aux valeurs indiquées dans le Tableau 3 pour l’aluminium et les alliages d’aluminium et dans le Tableau 4 pour les alliages résistants à la chaleur. Le présent document s’applique aux fils d’aluminium et en alliage d’aluminium destinés à la fabrication de conducteurs toronnés à couches concentriques pour lignes électriques aériennes, avec ou sans espace(s) pour le transport d’énergie.
Les différents matériaux et leurs désignations sont énumérés dans le Tableau 1. Les valeurs indiquées dans ce Tableau 1 sont utilisées pour les calculsCette première édition annule et remplace la deuxième édition de l’IEC 60104 parue en 1987, la première édition de l’IEC 60121 parue en 1960, la première édition de l’IEC 60889 parue en 1987 et la première édition de l’IEC 62004 parue en 2007. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport aux éditions précédentes de l’IEC 60104, l’IEC 60121, l’IEC 60889 et l’IEC 62004:

   
1. les désignations des alliages d’aluminium sont modifiées;

   
2. les alliages d’aluminium A4, AL4 et AL5 sont ajoutés;

   
3. les plages de diamètre du fil qui indiquent les propriétés mécaniques sont modifiées et étendues;

   
4. les méthodes d’essai sont fusionnées.

Vodniki za nadzemne vode - Aluminijaste žice in žice iz aluminijeve zlitine za koncentrične pletene vodnike (IEC 62641:2022)

General Information

• Status: Published
• Public Enquiry End Date: 18-Jul-2021
• Publication Date: 18-Dec-2022
• ICS: 29.240.20 - Power transmission and distribution lines
• ICS: 77.150.10 - Aluminium products
• Technical Committee: NVV - Overhead lines and overhead electrical conductors
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 19-May-2022
• Due Date: 24-Jul-2022
• Completion Date: 19-Dec-2022
• Ref Project: EN IEC 62641:2022 - Conductors for overhead lines - Aluminium and aluminium alloy wires for concentric lay stranded conductors

Relations

• Amended By: SIST EN IEC 62641:2022/A11:2022 - Conductors for overhead lines - Aluminium and aluminium alloy wires for concentric lay stranded conductors
• Effective Date: 23-Jun-2022
• Replaces: SIST EN 60889:2002 - Hard-drawn aluminium wire for overhead line conductors
• Effective Date: 07-Jun-2022
• Replaces: SIST EN 50183:2000 - Conductors for overhead lines - Aluminium-magnesium-silicon alloy wires
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 62641:2023
01-januar-2023
Nadomešča:
SIST EN 50183:2000
SIST EN 60889:2002
Vodniki za nadzemne vode - Aluminijaste žice in žice iz aluminijeve zlitine za
koncentrične pletene vodnike (IEC 62641:2022)

Conductors for overhead lines - Aluminium and aluminium alloy wires for concentric lay

stranded conductors (IEC 62641:2022)

Leiter für Freileitungen - Drähte aus Aluminium und Aluminiumlegierung für Leiter aus

konzentrisch verseilten Drähten (IEC 62641:2022)

Conducteurs pour lignes aériennes - Fils d'aluminium et en alliage d'aluminium pour

conducteurs toronnés à couches concentriques (IEC 62641:2022)
Ta slovenski standard je istoveten z: EN IEC 62641:2022
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
77.150.10 Aluminijski izdelki Aluminium products
SIST EN IEC 62641:2023 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 62641:2023
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SIST EN IEC 62641:2023
EUROPEAN STANDARD EN IEC 62641
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2022
ICS 29.060.01; 29.240.20 Supersedes EN 62004:2009, EN 50183:2000,
EN 60889:1997
English Version
Conductors for overhead lines - Aluminium and aluminium alloy
wires for concentric lay stranded conductors
(IEC 62641:2022)

Conducteurs pour lignes aériennes - Fils d'aluminium et en Leiter für Freileitungen - Drähte aus Aluminium und

alliage d'aluminium pour conducteurs toronnés à couches Aluminiumlegierung für Leiter aus konzentrisch verseilten

concentriques Drähten
(IEC 62641:2022) (IEC 62641:2022)

This European Standard was approved by CENELEC on 2022-04-08. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 62641:2022 E
---------------------- Page: 3 ----------------------
SIST EN IEC 62641:2023
EN IEC 62641:2022 (E)
European foreword

The text of document 7/713/FDIS, future edition 1 of IEC 62641, prepared by IEC/TC 7 "Overhead

electrical conductors" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC

as EN IEC 62641:2022.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2023-04-11

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2025-04-11

document have to be withdrawn

This document supersedes EN 62004:2009, EN 50183:2000 and EN 60889:1997 and all of its

amendments and corrigenda (if any).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Any feedback and questions on this document should be directed to the users’ national committee. A

complete listing of these bodies can be found on the CENELEC website.
Endorsement notice

The text of the International Standard IEC 62641:2022 was approved by CENELEC as a European

Standard without any modification.
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SIST EN IEC 62641:2023
IEC 62641
Edition 1.0 2022-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Conductors for overhead lines – Aluminium and aluminium alloy wires for
concentric lay stranded conductors
Conducteurs pour lignes aériennes – Fils d’aluminium et en alliage d’aluminium
pour conducteurs toronnés à couches concentriques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.01; 29.240.20 ISBN 978-2-8322-1080-6

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 5 ----------------------
SIST EN IEC 62641:2023
– 2 – IEC 62641:2022 © IEC 2022
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 Material ........................................................................................................................... 8

5 Joints .............................................................................................................................. 8

6 Tests ............................................................................................................................... 8

6.1 General ................................................................................................................... 8

6.2 Place of testing ....................................................................................................... 8

6.3 Sampling rate ......................................................................................................... 9

6.4 Test methods .......................................................................................................... 9

6.4.1 Appearance ..................................................................................................... 9

6.4.2 Wire diameter .................................................................................................. 9

6.4.3 Tensile strength ............................................................................................... 9

6.4.4 Elongation ....................................................................................................... 9

6.4.5 Wrapping ....................................................................................................... 10

6.4.6 Bending ......................................................................................................... 10

6.4.7 Electrical resistivity ........................................................................................ 10

6.4.8 Thermal resistance ........................................................................................ 10

6.5 Acceptance and rejection ...................................................................................... 11

6.6 Certificate of compliance ....................................................................................... 11

7 Length and tolerance on length...................................................................................... 11

Annex A (normative) Methods of securing formed wires ....................................................... 14

Annex B (informative) Thermal-resistant property ................................................................ 15

B.1 Thermal-resistant properties ................................................................................. 15

B.2 Explanation of the Arrhenius plot .......................................................................... 15

B.3 Continuous operation temperature ........................................................................ 16

B.4 Duration and heating temperature ......................................................................... 16

Bibliography .......................................................................................................................... 17

Figure A.1 – Methods of securing formed wires ..................................................................... 14

Figure B.1 – Arrhenius plot (residual strength 90 %) ............................................................. 15

a b

Table 1 – Designation and properties for calculation purposes .......................................... 11

Table 2 – Tolerance on wire diameter ................................................................................... 12

Table 3 – Minimum mechanical properties for Ax and ALx wires ........................................... 12

Table 4 – Minimum mechanical properties for ATx wires ....................................................... 13

Table 5 – Temperature and duration of heating ..................................................................... 13

Table 6 – Parameters for bending test of aluminium alloy wires ............................................ 13

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SIST EN IEC 62641:2023
IEC 62641:2022 © IEC 2022 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONDUCTORS FOR OVERHEAD LINES –
ALUMINIUM AND ALUMINIUM ALLOY WIRES
FOR CONCENTRIC LAY STRANDED CONDUCTORS
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their

preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

may participate in this preparatory work. International, governmental and non-governmental organizations liaising

with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence between

any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

rights. IEC shall not be held responsible for identifying any or all such patent rights.

IEC 62641 has been prepared by IEC technical committee 7: Overhead electrical conductors.

It is an International Standard.

This first edition cancels and replaces the second edition of IEC 60104 published in 1987, the

first edition of IEC 60121 published in 1960, the first edition of IEC 60889 published in 1987,

and the first edition of IEC 62004 published in 2007. This edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

editions of IEC 60104, IEC 60121, IEC 60889 and IEC 62004:
a) designations of aluminium alloys are modified;
b) aluminium alloys A4, AL4 and AL5 are added;

c) wire diameter ranges for indicating mechanical properties are modified and extended;

d) test methods are merged.
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SIST EN IEC 62641:2023
– 4 – IEC 62641:2022 © IEC 2022
The text of this International Standard is based on the following documents:
Draft Report on voting
7/713/FDIS 7/721/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under webstore.iec.ch in the data related to the

specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 8 ----------------------
SIST EN IEC 62641:2023
IEC 62641:2022 © IEC 2022 – 5 –
INTRODUCTION
The purpose of this document is threefold.

First, it is to group together similar wire materials that share the same general characteristics

and therefore the same test procedures and requirements. These wires are existing aluminium

and aluminium alloy wires from IEC 60104, IEC 60121, IEC 60889 and IEC 62004 as well as

from EN 50183.

Secondly, this format allows an easier standard maintenance, as multiple wire materials are

covered by a single document instead of separate documents.

Thirdly, this document indicates the most used wire materials worldwide, based on the

cooperation agreement between IEC and CENELEC, an IEC questionnaire in 2017 (7/672/Q,

Annex A) and a CENELEC questionnaire (7X/SEC0056/CC). The standardized materials form

a good basis which can be extended by others used in regions and countries.
---------------------- Page: 9 ----------------------
SIST EN IEC 62641:2023
– 6 – IEC 62641:2022 © IEC 2022
CONDUCTORS FOR OVERHEAD LINES –
ALUMINIUM AND ALUMINIUM ALLOY WIRES
FOR CONCENTRIC LAY STRANDED CONDUCTORS
1 Scope

This document specifies the mechanical and electrical properties of round and formed wires for

equivalent diameters up to the values according to Table 3 for aluminium and aluminium alloys

and according to Table 4 for thermal resistant alloys. This document is applicable to aluminium

and aluminium alloy wires for the manufacture of concentric lay overhead electrical stranded

conductors with or without gap(s) for power transmission purposes.

The various materials and their designations are listed in Table 1. For calculation purposes, the

values listed in Table 1 are used.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies.

For undated references, the latest edition of the referenced document (including any

amendments) applies.

IEC 60050 (all parts), International Electrotechnical Vocabulary (IEV) (available at

www.electropedia.org)
IEC 60468, Method of measurement of resistivity of metallic materials

IEC TR 61597, Overhead electrical conductors – Calculation methods for stranded bare

conductors

ISO 6892-1, Metallic materials – Tensile testing – Part 1: Method of test at room temperature

ISO 7801, Metallic materials – Wires – Reverse bend test
ISO 7802, Metallic materials – Wires – Wrapping test
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60050 (all parts) and

the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
---------------------- Page: 10 ---------------
...

SLOVENSKI STANDARD
oSIST prEN IEC 62641:2021
01-julij-2021

Vodniki za nadzemne vodnike - Aluminijaste žice in žice iz aluminijeve zlitine za

koncentrične proste vodnike

Conductors for overhead lines - Aluminium and aluminium alloy wires for concentric lay

stranded conductors
Ta slovenski standard je istoveten z: prEN IEC 62641:2021
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
77.150.10 Aluminijski izdelki Aluminium products
oSIST prEN IEC 62641:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN IEC 62641:2021
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oSIST prEN IEC 62641:2021
7/705/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62641 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2021-04-30 2021-07-23
SUPERSEDES DOCUMENTS:
7/696/CD, 7/700A/CC
IEC TC 7 : OVERHEAD ELECTRICAL CONDUCTORS
SECRETARIAT: SECRETARY:
China Mr Qiu Zheng
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
TC 11
Other TC/SCs are requested to indicate their interest, if any, in
this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY

SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING

Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.

Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which

they are aware and to provide supporting documentation.
TITLE:

Conductors for overhead lines – Aluminium and aluminium alloy wires for concentric lay stranded

conductors
PROPOSED STABILITY DATE: 2024
NOTE FROM TC/SC OFFICERS:

Copyright © 2021 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this

electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.

You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without

permission in writing from IEC.
---------------------- Page: 3 ----------------------
oSIST prEN IEC 62641:2021
IEC CDV 62641/Ed1 © IEC:2021 – 2 – 7/705/CDV
1 CONTENTS

3 FOREWORD ........................................................................................................................... 3

4 INTRODUCTION ..................................................................................................................... 5

5 1 Scope .............................................................................................................................. 6

6 2 Normative references ...................................................................................................... 6

7 3 Terms and definitions ...................................................................................................... 6

8 4 Material ........................................................................................................................... 8

9 5 Joints .............................................................................................................................. 8

10 6 Tests ............................................................................................................................... 8

11 6.1 General ................................................................................................................... 8

12 6.2 Place of testing ....................................................................................................... 8

13 6.3 Sampling rate ......................................................................................................... 8

14 6.4 Test methods .......................................................................................................... 8

15 6.4.1 Appearance ..................................................................................................... 8

16 6.4.2 Wire diameter .................................................................................................. 9

17 6.4.3 Tensile strength ............................................................................................... 9

18 6.4.4 Elongation ....................................................................................................... 9

19 6.4.5 Wrapping ......................................................................................................... 9

20 6.4.6 Bending ......................................................................................................... 10

21 6.4.7 Electrical resistivity ........................................................................................ 10

22 6.4.8 Thermal resistance ........................................................................................ 10

23 6.5 Acceptance and rejection ...................................................................................... 10

24 6.6 Certificate of compliance ....................................................................................... 10

25 7 Length and tolerance on length. .................................................................................... 10

26 Annex A (normative) Methods of securing formed wires ...................................................... 14

27 Annex B (informative) Thermal-resistant property ............................................................... 15

29 Figure A.1 – Methods of securing formed wires ..................................................................... 14

30 Figure B.1 – Arrhenius plot (residual stress 90 %) ................................................................ 15

32 Table 1 – Designation and properties for calculation purposes .............................................. 11

33 Table 2 – Tolerance on wire diameter ................................................................................... 11

34 Table 3 – Minimum mechanical properties for Ax and ALx wires ........................................... 12

35 Table 4 – Minimum mechanical properties for ATx wires ....................................................... 13

36 Table 5 – Temperature and duration of heating ..................................................................... 13

37 Table 6 – Parameters for bending test of aluminium alloy wires ............................................ 13

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oSIST prEN IEC 62641:2021
IEC CDV 62641/Ed1 © IEC:2021 – 3 – 7/705/CDV
40 INTERNATIONAL ELECTROTECHNICAL COMMISSION
41 ____________
43 CONDUCTORS FOR OVERHEAD LINES - ALUMINIUM AND ALUMINIUM
44 ALLOY WIRES FOR CONCENTRIC LAY STRANDED CONDUCTORS
46 FOREWORD

47 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

48 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

49 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

50 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

51 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their

52 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

53 may participate in this preparatory work. International, governmental and non-governmental organizations liaising

54 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

55 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

56 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

57 consensus of opinion on the relevant subjects since each technical committee has representation from all

58 interested IEC National Committees.

59 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

60 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

61 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

62 misinterpretation by any end user.

63 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

64 transparently to the maximum extent possible in their national and regional publications. Any divergence between

65 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.

66 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

67 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

68 services carried out by independent certification bodies.

69 6) All users should ensure that they have the latest edition of this publication.

70 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

71 members of its technical committees and IEC National Committees for any personal injury, property damage or

72 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

73 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

74 Publications.

75 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

76 indispensable for the correct application of this publication.

77 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

78 rights. IEC shall not be held responsible for identifying any or all such patent rights.

79 IEC 62641 has been prepared by IEC technical committee 7: OVERHEAD ELECTRICAL
80 CONDUCTORS. It is an International Standard.

81 This International Standard cancels and replaces IEC 60104:1987 Edition 2.0, IEC 60121:1960

82 Edition 1.0, IEC 60889:1987 Edition 1.0 and IEC 62004:2007 Edition 1.0.
83 The text of this International Standard is based on the following documents:
Draft Report on voting
7/696/CD 7/700A/CC

85 Full information on the voting for its approval can be found in the report on voting indicated in

86 the above table.

87 The language used for the development of this International Standard is English.

88 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

89 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

---------------------- Page: 5 ----------------------
oSIST prEN IEC 62641:2021
IEC CDV 62641/Ed1 © IEC:2021 – 4 – 7/705/CDV

90 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

91 described in greater detail at http://www.iec.ch/standardsdev/publications.

92 The committee has decided that the contents of this document will remain unchanged until the

93 stability date indicated on the IEC website under webstore.iec.ch in the data related to the

94 specific document. At this date, the document will be
95 • reconfirmed,
96 • withdrawn,
97 • replaced by a revised edition, or
98 • amended.
---------------------- Page: 6 ----------------------
oSIST prEN IEC 62641:2021
IEC CDV 62641/Ed1 © IEC:2021 – 5 – 7/705/CDV
100 INTRODUCTION
101 The purpose of this standard is threefold.

102 First, it is to group together similar wire materials that share the same general characteristics

103 and therefore the same test procedures and requirements. These wires are existing aluminium

104 and aluminium alloy wires from IEC 60104, IEC 60121, IEC 60889 and IEC 62004 as well as

105 from EN 50183.

106 Secondly, this format allows an easier standard maintenance, as multiple wire materials are

107 covered by a single standard instead of separate documents.

108 Thirdly, this standard indicates the most used wire materials worldwide, based on the

109 cooperation agreement between IEC and CENELEC, an IEC questionnaire in 2017 (7/672/Q,

110 Annex A) and a CENELEC questionnaire (7X/SEC0056/CC). The standardized materials form

111 a good basis which may be extended by others used in regions and countries.
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112 CONDUCTORS FOR OVERHEAD LINES - ALUMINIUM AND ALUMINIUM
113 ALLOY WIRES FOR CONCENTRIC LAY STRANDED CONDUCTORS
114
115
116
117 1 Scope

118 This document specifies the mechanical and electrical properties of round and formed wires for

119 equivalent diameters up to the values as per Table 3 for aluminium and aluminium alloys and

120 as per Table 4 for thermal resistant alloys. This document is applicable to aluminium and

121 aluminium alloy wires for the manufacture of concentric lay overhead electrical stranded

122 conductors with or without gap(s) for power transmission purposes.

123 The various materials and their designations are listed in Table 1. For calculation purposes, the

124 values listed in Table 1 shall be used.
125 2 Normative references

126 The following documents are referred to in the text in such a way that some or all of their content

127 constitutes requirements of this document. For dated references, only the edition cited applies.

128 For undated references, the latest edition of the referenced document (including any

129 amendments) applies.
130 IEC 60028, International standard of resistance for copper
131 IEC 60050, International electrotechnical vocabulary
132 IEC 60468, Method of measurement of resistivity of metallic materials

133 IEC TR 61597, Overhead electrical conductors - calculation methods for stranded bare

134 conductors

135 ISO 6892-1, Metallic materials - tensile testing - part 1: method of test at room temperature

136 ISO 7801, Metallic materials - wires - reverse bend test
137 ISO 7802, Metallic materials - wires - wrapping test
138 3 Terms and definitions

139 For the purposes of this document, the terms and definitions given in IEC 60050 and the

140 following terms and definitions apply.

141 ISO and IEC maintain terminological databases for use in standardization at the following

142 addresses:
143 • IEC Electropedia: available at http://www.electropedia.org/
144 • ISO Online browsing platform: available at http://www.iso.org/obp
145 3.1
146 aluminium
147 all types of aluminium and aluminium alloys (Ax, ALx in Table 1, 3.13 and 4)
148 3.2
149 annealed aluminium

150 heat treated aluminium (A0 and AL0 in Table 1) for increasing its ductility, reducing its hardness

151 and strength and having constant mechanical and electrical properties even at temperatures up

152 to 250°C
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153 3.3
154 equivalent diameter

155 the diameter of a round wire, which would have the same cross section area of a given formed

156 wire
157 3.4
158 formed wire
159 a drawn or rolled metal wire having a constant non-circular cross-section
160 3.5
161 lot

162 a group of production units of one type and size of wire, which was manufactured by the same

163 manufacturer during the same time period under similar conditions of production.

164 Note: A lot can consist of part or all of a purchased quantity.
165 3.6
166 nominal

167 the value of a measurable property to which tolerance is applied. Nominal values are target

168 values
169 3.7
170 production unit

171 a coil, reel, spool, or other package of wire that represents a single usable length

172 3.8
173 residual strength ratio

174 the ratio of the measured tensile strength at room temperature of a wire previously submitted

175 to heating, to its measured tensile strength at room temperature prior to heating (to be applied

176 only to thermal resistant aluminium alloys)
177 3.9
178 round wire
179 a filament of drawn metal having a constant circular cross-section
180 3.10
181 sample

182 specimen or specimens removed from a production unit or units which is considered to have

183 properties representative of a lot
184 3.11
185 specimen
186 a length of wire removed for test purposes
187 3.12
188 thermal resistance

189 the capacity of a thermal resistant aluminium alloy to have a residual strength ratio of not less

190 than 0,90 after heating
191 3.13
192 thermal resistant aluminium alloy

193 all types of aluminium alloys (ATx in Table 1) designed to operate continuously higher than that

194 of conventional aluminium alloy wires or hard-drawn aluminium wires
...