IEC 60317-73:2018

Specifications for particular types of winding wires - Part 73: Polyester or polyesterimide overcoated with polyamide-imide enamelled rectangular aluminium wire, class 200

IEC 60317-73:2018 specifies the requirements of enamelled rectangular aluminium winding wire of class 200 with a dual coating. The underlying coating is based on polyester or polyesterimide resin, which can be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements. The superimposed coating is based on polyamide-imide resin. NOTE A modified resin is a resin that has undergone a chemical change, or contains one or more additives to enhance certain performance or application characteristics. The range of nominal conductor dimensions covered by this standard is:
- width: min. 2,0 mm - max. 16,0 mm;
- thickness: min. 0,80 mm - max. 5,60 mm.
Wires of grade 1 and grade 2 are included in this specification and apply to the complete range of conductors. The specified combinations of width and thickness as well as the specified width/thickness ratio are given in IEC 60317-0-9:2015.
Keywords: insulated wires used for windings

Spécifications pour types particuliers de fils de bobinage - Partie 73: Fil de section rectangulaire émaillé en aluminium revêtu de polyester ou de polyesterimide ainsi que de polyamide-imide, de classe 200

IEC 60317-73:2018 spécifie les exigences relatives aux fils de bobinage de section rectangulaire en aluminium émaillé de classe 200 à double revêtement. La première couche de revêtement est en résine de polyester ou de polyesterimide; elle peut être modifiée à condition de conserver les propriétés chimiques de la résine d'origine et de respecter toutes les exigences spécifiées pour les fils. La deuxième couche de revêtement est en résine de polyamide-imide. NOTE Une résine modifiée est une résine dont les propriétés chimiques ont été modifiées ou qui contient un ou plusieurs additifs visant à améliorer certaines performances ou caractéristiques d'application.La plage des dimensions nominales des conducteurs couvertes par la présente norme est:
- pour la largeur: min. 2,0 mm - max. 16,0 mm;
- pour l'épaisseur: min. 0,80 mm - max. 5,60 mm.
Les fils de grades 1 et 2 sont couverts par la présente spécification et s'appliquent à toute la gamme des conducteurs.
Les combinaisons largeur-épaisseur spécifiées ainsi que le rapport largeur/épaisseur spécifié sont indiqués dans l'IEC 60317-0-9:2015.
Mots clés: fils isolés utilisés pour les enroulements

General Information

• Status: Published
• Publication Date: 13-Jun-2024
• ICS: 29.060.10 - Wires
• Technical Committee: TC 55 - Winding wires
• Drafting Committee: PT 60317-73 - TC 55/PT 60317-73
• Current Stage: PPUB - Publication issued
• Start Date: 27-Feb-2018
• Completion Date: 16-Mar-2018

Relations

• Amended By: IEC 60317-73:2018/AMD1:2024 - Amendment 1 - Specifications for particular types of winding wires - Part 73: Polyester or polyesterimide overcoated with polyamide-imide enamelled rectangular aluminium wire, class 200
• Effective Date: 05-Sep-2023

Overview

IEC 60317-73:2018 (with Amendment 1:2024) specifies enamelled rectangular aluminium winding wire, class 200, with a dual-coating system: an underlying polyester or polyesterimide resin and a superimposed polyamide‑imide enamel. This part of the IEC 60317 series defines material, dimensional and performance requirements for insulated wires used for windings in electrical equipment, covering nominal conductor widths from 2.0 mm to 16.0 mm and thicknesses from 0.80 mm to 5.60 mm. Both grade 1 and grade 2 wires are included.

Key topics and requirements

• Dual-coating chemistry: Base coat based on polyester or polyesterimide (modifications allowed if chemical identity is retained); top coat based on polyamide‑imide.
• Thermal class: Class 200 requires a minimum temperature index of 200 °C and a heat shock temperature ≥ 220 °C.
• Dimensional range: Width 2.0–16.0 mm; thickness 0.80–5.60 mm. Specific width/thickness combinations and ratios are referenced to IEC 60317-0-9:2015.
• Performance testing: Many tests and criteria are applied via IEC 60317-0-9 and IEC 60851 test methods (electrical resistance, elongation, flexibility and adherence, breakdown voltage at elevated temperature, etc.). Several tests are declared inappropriate for this wire type (for instance cut‑through, resistance to abrasion, some bonding or solderability tests). Some tests (dielectric dissipation factor, resistance to transformer oil) are under consideration.
• Grades and applicability: Requirements apply across the full range of conductor sizes for grade 1 and grade 2 classifications.
• Packaging: Packaging provisions follow IEC 60317-0-9 and relevant packaging standards (IEC 60264 series).

Applications

IEC 60317-73 targets insulated wires used for windings where a rectangular aluminium conductor with high thermal performance and robust enamel insulation is required. Typical applications include:

• Power transformers and distribution transformers where aluminium rectangular conductors are preferred for packing efficiency.
• Large motors, generator windings, and reactors requiring precise conductor dimensions and class 200 thermal performance.
• Industrial electromagnetic coils and winding assemblies where thermal endurance and solvent/chemical resistance from polyamide‑imide coatings are beneficial.

Who uses this standard

• Winding wire manufacturers and enamel formulators specifying product formulations and dimensional limits.
• Electrical equipment designers and OEMs specifying winding materials for thermal class 200 applications.
• Test labs and quality assurance teams verifying compliance to IEC winding‑wire specifications.
• Procurement and certification bodies assessing supplier conformance.

Related standards

• IEC 60317-0-9:2015 (general requirements for enamelled rectangular aluminium wire)
• IEC 60851 series (winding wires - test methods)
• IEC 60264 series (packaging of winding wires)

Keywords: IEC 60317-73, enamelled rectangular aluminium wire, polyesterimide, polyamide‑imide, class 200, insulated wires used for windings, winding wire standard.

Standards Content (Sample)

IEC 60317-73 ®
Edition 1.1 2024-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Specifications for particular types of winding wires –
Part 73: Polyester or polyesterimide overcoated with polyamide-imide enamelled
rectangular aluminium wire, class 200

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC 60317-73 ®
Edition 1.1 2024-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Specifications for particular types of winding wires –
Part 73: Polyester or polyesterimide overcoated with polyamide-imide enamelled
rectangular aluminium wire, class 200
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.060.10 ISBN 978-2-8322-9216-7
REDLINE VERSION – 2 – IEC 60317-73:2018+AMD1:2024 CSV
© IEC 2024
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, general notes and appearance . 6
3.1 Terms and definitions . 6
3.2 General notes . 7
3.2.1 Methods of test . 7
3.2.2 Winding wire . 7
3.3 Appearance . 7
4 Dimensions. 7
5 Electrical resistance . 7
6 Elongation . 7
7 Springiness . 7
8 Flexibility and adherence . 7
9 Heat shock . 7
10 Cut-through . 7
11 Resistance to abrasion . 8
12 Resistance to solvents . 8
13 Breakdown voltage . 8
14 Continuity of insulation . 8
15 Temperature index . 8
16 Resistance to refrigerants . 8
17 Solderability . 8
18 Heat or solvent bonding . 8
19 Dielectric dissipation factor . 8
20 Resistance to transformer oil . 8
21 Loss of mass . 8
23 Pin hole test . 8
30 Packaging . 9
Bibliography . 10

© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFICATIONS FOR PARTICULAR
TYPES OF WINDING WIRES –
Part 73: Polyester or polyesterimide overcoated with polyamide-imide
enamelled rectangular aluminium wire, class 200

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
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This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 60317-73 edition 1.1 contains the first edition (2018-02) [documents 55/1634/FDIS
and 55/1639/RVD] and its amendment 1 (2024-06) [documents 55/2000/CDV and
55/2036/RVC].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendment 1. Additions are in green text, deletions are in strikethrough
red text. A separate Final version with all changes accepted is available in this
publication.
REDLINE VERSION – 4 – IEC 60317-73:2018+AMD1:2024 CSV
© IEC 2024
International Standard IEC 60317-73 has been prepared by IEC technical committee 55:
Winding wires.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60317 series, published under the general title Specifications for
particular types of winding wires, can be found on the IEC website.
This International Standard is to be used in conjunction with IEC 60317-0-9:2015 and its
Amendment 1:2024.
The numbering of clauses in this standard is not continuous from Clauses 21 through 30 in
order to reserve space for possible future wire requirements prior to those for wire packaging.
The committee has decided that the contents of this document and its amendment 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, or
• revised.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
© IEC 2024
INTRODUCTION
This part of IEC 60317 forms an element of a series of standards which deals with insulated
wires used for windings in electrical equipment. The series has three groups describing:
1) Winding wires – Test methods (IEC 60851 series);
2) Specifications for particular types of winding wires (IEC 60317 series);
3) Packaging of winding wires (IEC 60264 series).

REDLINE VERSION – 6 – IEC 60317-73:2018+AMD1:2024 CSV
© IEC 2024
SPECIFICATIONS FOR PARTICULAR
TYPES OF WINDING WIRES –
Part 73: Polyester or polyesterimide overcoated with polyamide-imide
enamelled rectangular aluminium wire, class 200

1 Scope
This part of IEC 60317 specifies the requirements of enamelled rectangular aluminium
winding wire of class 200 with a dual coating. The underlying coating is based on polyester or
polyesterimide resin, which can be modified providing it retains the chemical identity of the
original resin and meets all specified wire requirements. The superimposed coating is based
on polyamide-imide resin.
NOTE A modified resin is a resin that has undergone a chemical change, or contains one or more additives to
enhance certain performance or application characteristics.
The range of nominal conductor dimensions covered by this standard is:
– width: min. 2,0 mm max. 16,0 mm;
– thickness: min. 0,80 mm max. 5,60 mm.
Wires of grade 1 and grade 2 are included in this specification and apply to the complete
range of conductors.
The specified combinations of width and thickness as well as the specified width/thickness
ratio are given in IEC 60317-0-9:2015.
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 60317-0-9:2015, Specifications for particular types of winding wires – Part 0-9: General
requirements – Enamelled rectangular aluminium wire.
IEC 60317-0-9:2015/AMD1:2024
3 Terms, definitions, general notes and appearance
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60317-0-9 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

© IEC 2024
3.2 General notes
3.2.1 Methods of test
Subclause 3.2.1 of IEC 60317-0-9:2015 and IEC 60317-0-9:2015/AMD1:2024 applies.
In case of inconsistencies between IEC 60317-0-9 and this document, IEC 60317-73 shall
prevail.
3.2.2 Winding wire
Class 200 is a thermal class that requires a minimum temperature index of 200 and a heat
shock temperature of at least 220 °C.
The temperature in degrees Celsius corresponding to the temperature index is not necessarily
that at which it is recommended that the wire be operated and this will depend on many
factors, including the type of equipment involved.
3.3 Appearance
Subclause 3.3 of IEC 60317-0-9:2015 applies.
4 Dimensions
Clause 4 of IEC 60317-0-9:2015 applies.
5 Electrical resistance
Clause 5 of IEC 60317-0-9:2015 an
...

IEC 60317-73 ®
Edition 1.0 2018-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –
Part 73: Polyester or polyesterimide overcoated with polyamide-imide enamelled
rectangular aluminium wire, class 200

Spécifications pour types particuliers de fils de bobinage –
Partie 73: Fil de section rectangulaire émaillé en aluminium revêtu de polyester
ou de polyesterimide ainsi que de polyamide-imide, de classe 200

All rights reserved. Unless otherwise specified, 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
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IEC 60317-73 ®
Edition 1.0 2018-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –

Part 73: Polyester or polyesterimide overcoated with polyamide-imide enamelled

rectangular aluminium wire, class 200

Spécifications pour types particuliers de fils de bobinage –

Partie 73: Fil de section rectangulaire émaillé en aluminium revêtu de polyester

ou de polyesterimide ainsi que de polyamide-imide, de classe 200

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.10 ISBN 978-2-8322-5416-5

– 2 – IEC 60317-73:2018 © IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, general notes and appearance . 6
3.1 Terms and definitions . 6
3.2 General notes . 7
3.2.1 Methods of test . 7
3.2.2 Winding wire . 7
3.3 Appearance . 7
4 Dimensions. 7
5 Electrical resistance . 7
6 Elongation . 7
7 Springiness . 7
8 Flexibility and adherence . 7
9 Heat shock . 7
10 Cut-through . 7
11 Resistance to abrasion . 7
12 Resistance to solvents . 8
13 Breakdown voltage . 8
14 Continuity of insulation . 8
15 Temperature index . 8
16 Resistance to refrigerants . 8
17 Solderability . 8
18 Heat or solvent bonding . 8
19 Dielectric dissipation factor . 8
20 Resistance to transformer oil . 8
21 Loss of mass . 8
23 Pin hole test . 8
30 Packaging . 8
Bibliography . 9

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFICATIONS FOR PARTICULAR
TYPES OF WINDING WIRES –
Part 73: Polyester or polyesterimide overcoated with polyamide-imide
enamelled rectangular aluminium wire, class 200

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.
International Standard IEC 60317-73 has been prepared by IEC technical committee 55:
Winding wires.
The text of this International Standard is based on the following documents:
FDIS Report on voting
55/1634/FDIS 55/1639/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – IEC 60317-73:2018 © IEC 2018
A list of all parts in the IEC 60317 series, published under the general title Specifications for
particular types of winding wires, can be found on the IEC website.
The numbering of clauses in this standard is not continuous from Clauses 21 through 30 in
order to reserve space for possible future wire requirements prior to those for wire packaging.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://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.
INTRODUCTION
This part of IEC 60317 forms an element of a series of standards which deals with insulated
wires used for windings in electrical equipment. The series has three groups describing:
1) Winding wires – Test methods (IEC 60851 series);
2) Specifications for particular types of winding wires (IEC 60317 series);
3) Packaging of winding wires (IEC 60264 series).

– 6 – IEC 60317-73:2018 © IEC 2018
SPECIFICATIONS FOR PARTICULAR
TYPES OF WINDING WIRES –
Part 73: Polyester or polyesterimide overcoated with polyamide-imide
enamelled rectangular aluminium wire, class 200

1 Scope
This part of IEC 60317 specifies the requirements of enamelled rectangular aluminium
winding wire of class 200 with a dual coating. The underlying coating is based on polyester or
polyesterimide resin, which can be modified providing it retains the chemical identity of the
original resin and meets all specified wire requirements. The superimposed coating is based
on polyamide-imide resin.
NOTE A modified resin is a resin that has undergone a chemical change, or contains one or more additives to
enhance certain performance or application characteristics.
The range of nominal conductor dimensions covered by this standard is:
– width: min. 2,0 mm max. 16,0 mm;
– thickness: min. 0,80 mm max. 5,60 mm.
Wires of grade 1 and grade 2 are included in this specification and apply to the complete
range of conductors.
The specified combinations of width and thickness as well as the specified width/thickness
ratio are given in IEC 60317-0-9:2015.
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 60317-0-9:2015, Specifications for particular types of winding wires – Part 0-9:
...