IEC 62004:2007
(Main)Thermal-resistant aluminium alloy wire for overhead line conductor
Thermal-resistant aluminium alloy wire for overhead line conductor
Applicable to thermal-resistant aluminium alloy wires before stranding for manufacture of stranded conductors for overhead lines. It specifies the mechanical, electrical and thermal resistant properties of wires in the diameter range commercially available.
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INTERNATIONAL IEC
STANDARD 62004
First edition
2007-02
Thermal-resistant aluminium alloy wire
for overhead line conductor
Reference number
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60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
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INTERNATIONAL IEC
STANDARD 62004
First edition
2007-02
Thermal-resistant aluminium alloy wire
for overhead line conductor
© IEC 2007 ⎯ Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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International Electrotechnical Commission
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For price, see current catalogue
– 2 – 62004 © IEC:2007(E)
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references .5
3 Terms and definitions .5
4 Designation .5
5 Values for thermal-resistant aluminium alloy wire .6
6 Requirement.6
6.1 Material .6
6.2 Freedom from defects .6
6.3 Diameter and tolerance on diameter.6
6.4 Tensile stress.7
6.5 Elongation .7
6.6 Electrical resistivity .8
6.7 Thermal- resistant property .8
6.8 Length and tolerance on length .8
6.9 Joints .8
6.10 Wrapping.8
6.11 Sampling .9
7 Tests .9
7.1 Place of testing .9
7.2 Classification of tests .9
7.3 Test method .10
8 Acceptance and rejection .11
Annex A (informative) Thermal-resistant property .12
Bibliography.14
Figure A.1 – Arrhenius plot (residual stress 90 %) .12
Table 1 – Values for thermal-resistant aluminium alloy wire .6
Table 2 – Diameter and tolerance on diameter.6
Table 3 – Tensile stress and elongation of wires (before stranding) .7
Table 4 – Electrical resistivity .8
Table 5 – Duration and temperature of heating to affirm thermal- resistant property.8
62004 © IEC:2007(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
THERMAL-RESISTANT ALUMINIUM ALLOY WIRE
FOR OVERHEAD LINE CONDUCTOR
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
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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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.
International Standard IEC 62004 has been prepared by IEC technical committee 7: Overhead
electrical conductors.
The text of this standard is based on the following documents:
FDIS Report on voting
7/569/FDIS 7/571/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
– 4 – 62004 © IEC:2007(E)
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
62004 © IEC:2007(E) – 5 –
THERMAL-RESISTANT ALUMINIUM ALLOY WIRE
FOR OVERHEAD LINE CONDUCTOR
1 Scope
This International Standard is applicable to thermal-resistant aluminium alloy wires before
stranding for manufacture of stranded conductors for overhead lines. It specifies the
mechanical, electrical and thermal resistant properties of wires in the diameter range
commercially available.
2 Normative references
The following referenced documents are indispensable for the application 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 60468:1974, Method of measurement of resistivity of metallic materials
IEC 60104:1987, Aluminium-magnesium silicon alloy wire for overhead line conductors
IEC 60889:1987, Hard-drawn aluminium wire for overhead line conductors
3 Terms and definitions
For the purposes of this document, the following definitions apply.
3.1
diameter
mean of two measured values at right angles taken at the same cross section
NOTE For non-round wires, the equivalent diameter of the round wire with the same section is used.
3.2
type
thermal-resistant aluminium alloy wires defined as “AT1”, “AT2”, “AT3” and “AT4”
3.3
thermal-resistant aluminium alloy wire
all types of aluminium-zirconium alloy wire, used at operation temperature higher than that of
conventional aluminium-magnesium-silicon alloy wire, as specified in IEC 60104, or hard-
drawn aluminium wire for overhead line conductors, as specified in IEC 60889, with an
allowable operating temperature as described in Table 1
4 Designation
The wire designations included in this standard are as follows:
– thermal-resistant aluminium alloy wire with maximum allowable continuous operating
temperature of 150 °C, designated AT1;
– extra high-strength, thermal-resistant aluminium alloy wire with maximum allowable
continuous operating temperature of 150 °C, designated AT2;
– 6 – 62004 © IEC:2007(E)
– super thermal-resistant aluminium alloy wire with maximum allowable continuous
operating temperature of 210 °C, designated AT3;
– extra thermal-resistant aluminium alloy wire with maximum allowable continuous operating
temperature of 230 °C, designated AT4.
5 Values for thermal-resistant aluminium alloy wire
For calculation purposes, the values given in Table 1 shall be used for thermal-resistant
aluminium alloy wire.
Table 1 – Values for thermal-resistant aluminium alloy wire
Type AT1 AT2 AT3 AT4
Density at 20 °C (g/cm) 2,703 2,703 2,703 2,703
Allowable continuous operating temperature (40 years)
150 150 210 230
( °C)
Allowable operating temperature in 400 h ( °C) 180 180 240 310
–6 –6 –6 –6
Coefficient of linear expansion (/ °C)
23 × 10 23 × 10 23 × 10 23 × 10
Constant-mass temperature coefficient of resistance
0,004 0 0,003 6 0,004 0 0,003 8
at 20 °C (/ °C)
6 Requirement
6.1 Material
The wires shall be of aluminium-zirconium alloy having a composition appropriate to the
mechanical, electrical and thermal-resistant properties specified hereunder for type AT1, AT2,
AT3 and AT4, respectively.
6.2 Freedom from defects
The wires shall be smooth and free from all imperfections such as cracks, roughness, grooves,
inclusions or other defects which may endanger the performance of the product.
6.3 Diameter and tolerance on diameter
The nominal diameter of the wires shall be expressed in millimetres to two decimal places.
Each measured value of wire diameter shall not depart from the nominal diameter by more
than the amounts given in Table 2.
For the p
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