IEC 60317-38:2013

Specifications for particular types of winding wires - Part 38: Polyester or polyesterimide overcoated with polyamide-imide, enamelled round copper wire, class 200, with a bonding layer

IEC 60317-38:2013 specifies the requirements of enamelled round copper winding wire of class 200 with a triple coating. The underlying coating is based on polyester or polyesterimide resin, which may be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements. The secondary coating is based on polyamide-imide resin. The third coating is a bonding layer based on a thermoplastic or thermosetting 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 diameters covered by this part is:
- Grade 1B: 0,050 mm up to and including 1,600 mm;
- Grade 2B: 0,050 mm up to and including 1,600 mm. The nominal conductor diameters are specified in Clause 4 of IEC 60317-0-1:2013. This second edition cancels and replaces the first edition published in 1992, Amendment 1:1997 and Amendment 2:1999. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- new 3.2.2 containing general notes on winding wire, formerly a part of the scope;
- revision to references to IEC 60317-0-1:2013 to clarify that their application is normative;
- new Clause 23, Pin hole test. Key words: requirements of enamelled round copper winding wire, class 200, triple coating

Spécifications pour types particuliers de fils de bobinage - Partie 38: Fil de section circulaire en cuivre émaillé avec polyester ou polyesterimide et avec surcouche polyamide-imide, classe 200, avec une couche adhérente

La CEI 60317-38:2013 spécifie les exigences relatives aux fils de bobinage de section circulaire en cuivre émaillé de classe 200 avec un triple revêtement. La sous-couche est à base de résine polyester ou polyesterimide, qui peut être modifiée sous réserve de conserver l'identité chimique de la résine initiale et de répondre à toutes les exigences spécifiées pour le fil. La deuxième couche est à base de résine polyamide-imide. La troisième couche est une couche adhérente à base de résine thermoplastique ou thermodurcissable. NOTE - Une résine modifiée est une résine qui a subi une modification chimique, ou qui contient un ou plusieurs additifs pour améliorer certaines performances ou les caractéristiques d'utilisation. La gamme des diamètres nominaux des conducteurs couverte par la présente partie est:
- Grade 1B: 0,050 mm jusqu'à 1,600 mm compris;
- Grade 2B: 0,050 mm jusqu'à 1,600 mm compris. Les diamètres nominaux des conducteurs sont spécifiés dans l'Article 4 de la CEI 60317-0-1:2013. Cette deuxième édition annule et remplace la première édition parue en 1992, l'Amendement 1:1997 et l'Amendement 2:1999. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- un nouveau 3.3.2 contenant des notes générales sur le fil de bobinage intégrées auparavant au domaine d'application;
- une révision des références à la CEI 60317-0-1:2013 pour bien établir que leur application est normative;
- un nouvel Article 23, Détection des microfissures en immersion. Mots clés: exigences relatives aux fils de bobinage de section circulaire en cuivre émaillé, classe 200, triple revêtement

General Information

• Status: Published
• Publication Date: 13-Jun-2024
• ICS: 29.060.10 - Wires
• Technical Committee: TC 55 - Winding wires
• Drafting Committee: WG 1 - TC 55/WG 1
• Current Stage: PPUB - Publication issued
• Start Date: 14-Oct-2013
• Completion Date: 15-Nov-2013

Relations

• Amended By: IEC 60317-38:2013/AMD1:2024 - Amendment 1 - Specifications for particular types of winding wires - Part 38: Polyester or polyesterimide overcoated with polyamide-imide, enamelled round copper wire, class 200, with a bonding layer
• Effective Date: 05-Sep-2023
• Revises: IEC 60317-38:1992 - Specifications for particular types of winding wires - Part 38: Polyester or polyesterimide overcoated with polyamide-imide, enamelled round copper wire, class 200, with a bonding layer
• Effective Date: 05-Sep-2023
• Revises: IEC 60317-38:1992/AMD2:1999 - Amendment 2 - Specifications for particular types of winding wires - Part 38: Polyester or polyesterimide overcoated with polyamide-imide, enamelled round copper wire, class 200, with a bonding layer
• Effective Date: 05-Sep-2023
• Revises: IEC 60317-38:1992/AMD1:1997 - Amendment 1 - Specifications for particular types of winding wires - Part 38: Polyester or polyesterimide overcoated with polyamide-imide, enamelled round copper wire, class 200, with a bonding layer
• Effective Date: 05-Sep-2023

Overview

IEC 60317-38:2013 (with Amendment 1:2024) specifies requirements for enamelled round copper winding wire, class 200, with a triple coating: an underlying polyester or polyesterimide resin, a secondary polyamide‑imide resin, and a third bonding layer (thermoplastic or thermosetting). The standard covers nominal conductor diameters Grade 1B and 2B: 0.050 mm to 1.600 mm and sets electrical, mechanical and thermal performance criteria for high‑temperature winding wire used in electrical equipment.

Key SEO terms: IEC 60317-38, enamelled round copper wire, class 200, polyesterimide, polyamide-imide, triple coating, bonding layer, winding wire standards.

Key topics and technical requirements

• Coating system: Triple coating - polyester or polyesterimide (base), polyamide‑imide (secondary), and a bonding top layer. Modified resins are permitted if they retain the original resin’s chemical identity and meet requirements.
• Thermal class: Class 200 requires a minimum temperature index of 200 and heat shock ≥ 220 °C. The temperature index is a material rating, not necessarily an operating recommendation.
• Dimensional & electrical tests: Conductor diameters, electrical resistance, continuity of insulation and breakdown voltage follow normative references to IEC 60317-0-1:2013.
• Mechanical & durability tests: Elongation, springiness, flexibility/adherence, cut‑through (no failure within 2 min at 320 °C), resistance to abrasion (specified by diameter), and resistance to solvents and transformer oil.
• Bonding and solderability: Heat bonding strength (helical and twisted coils) and solvent bonding methods; solderability and dielectric dissipation factor are specified.
• New/updated provisions: Amendment adds general notes on winding wire, clarifies normative references to IEC 60317‑0‑1:2013, and introduces Clause 23 - Pin hole test.
• Packaging: Requirements for supply and packaging are included.

Practical applications

• Designed for high‑temperature windings in: motors, transformers, inductors, solenoids, coils for power electronics, and other rotating and stationary electrical equipment.
• Especially relevant where thermal endurance, mechanical abrasion resistance and reliable bonding of windings are required (industrial, automotive, aerospace and power distribution equipment).

Who uses this standard

• Winding wire manufacturers and formulators (polyester/polyesterimide, polyamide‑imide coatings)
• Motor and transformer designers and OEMs specifying insulation systems
• Test and quality laboratories performing acceptance and type testing
• Procurement, compliance and certification teams ensuring material conformance

Related standards

• IEC 60317-0-1:2013 (General requirements for enamelled round copper wire) - normative reference for tests and dimensions
• IEC 60851 (Wire test methods) - complementary test procedures

Use IEC 60317-38 when specifying or qualifying class 200 enamelled copper winding wire with a bonding layer to ensure consistent, tested insulation performance in high‑temperature electrical windings.

Standards Content (Sample)

IEC 60317-38 ®
Edition 2.1 2024-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Specifications for particular types of winding wires –
Part 38: Polyester or polyesterimide overcoated with polyamide-imide,
enamelled round copper wire, class 200, with a bonding layer

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC 60317-38 ®
Edition 2.1 2024-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Specifications for particular types of winding wires –
Part 38: Polyester or polyesterimide overcoated with polyamide-imide,
enamelled round copper wire, class 200, with a bonding layer
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.060.10 ISBN 978-2-8322-9209-9
REDLINE VERSION – 2 – IEC 60317-38:2013+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 . 6
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 (nominal conductor diameters from 0,250 mm up to and
including 1,600 mm) . 8
12 Resistance to solvents . 8
13 Breakdown voltage . 8
14 Continuity of insulation . 8
15 Temperature index . 9
16 Resistance to refrigerants . 9
17 Solderability . 9
18 Heat or solvent bonding . 9
18.1 Heat bonding . 9
18.1.1 Heat bonding strength of a helical coil . 9
18.1.2 Bond strength on a twisted coil . 10
18.2 Solvent bonding . 11
19 Dielectric dissipation factor . 11
20 Resistance to transformer oil . 11
21 Loss of mass . 11
23 Pin hole test . 11
30 Packaging . 11
Bibliography . 12

Table 1 – Resistance to abrasion . 8
Table 2 – Loads . 10

© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –

Part 38: Polyester or polyesterimide overcoated with polyamide-imide,
enamelled round copper wire, class 200, with a bonding layer

FOREWORD
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This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 60317-38 edition 2.1 contains the second edition (2013-10) [documents 55/1419/FDIS
and 55/1440/RVD] and its amendment 1 (2024-06) [documents 55/1992/CDV and
55/2028/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 60317-38:2013+AMD1:2024 CSV
© IEC 2024
International Standard IEC 60317-38 has been prepared by IEC technical committee 55:
Winding wires.
This second edition cancels and replaces the first edition published in 1992,
Amendment 1:1997 and Amendment 2:1999. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– new 3.2.2 containing general notes on winding wire, formerly a part of the scope;
– revision to references to IEC 60317-0-1:2013 to clarify that their application is normative;
– new Clause 23, Pin hole test.
This publication 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 60317-0-1:2013 and its
Amendment 1:2019.
The numbering of clauses in this standard is not continuous from Clauses 20 and 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 is one of a series which deals with insulated wires used for windings in
electrical equipment. The series has three groups describing:
1) Winding wires – Test methods (IEC 60851);
2) Specifications for particular types of winding wires (IEC 60317);
3) Packaging of winding wires (IEC 60264).

REDLINE VERSION – 6 – IEC 60317-38:2013+AMD1:2024 CSV
© IEC 2024
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –

Part 38: Polyester or polyesterimide overcoated with polyamide-imide,
enamelled round copper wire, class 200, with a bonding layer

1 Scope
This part of IEC 60317 specifies the requirements of enamelled round copper winding wire of
class 200 with a triple coating. The underlying coating is based on polyester or polyesterimide
resin, which may be modified providing it retains the chemical identity of the original resin and
meets all specified wire requirements. The secondary coating is based on polyamide-imide
resin. The third coating is a bonding layer based on a thermoplastic or thermosetting 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 diameters covered by this part is:
– Grade 1B: 0,050 mm up to and including 1,600 mm;
– Grade 2B: 0,050 mm up to and including 1,600 mm.
The nominal conductor diameters are specified in Clause 4 of IEC 60317-0-1:2013.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. 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 60317-0-1 :2013, Specifications for particular types of winding wires – Part 0-1: General
requirements – Enamelled round copper wire.
IEC 60317-0-1:2013/AMD1:2019
3 Terms, definitions, general notes and appearance
3.1 Terms and definitions
Subclause 3.1 of IEC 60317-0-1:2013 applies.
For the purposes of this document, the terms and definitions given in IEC 60317-0-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp

There exists a consolidated edition 4.1:2021 that includes IEC 60317-0-1:2013 and its Amendment 1:2019.

© IEC 2024
3.2 General notes
3.2.1 Methods of test
Subclause 3.2.1 of IEC 60317-0-1:2013 and IEC 60317-0-1:2013/AMD1:2019 applies.
In case of inconsistencies between IEC 60317-0-1:2013 and this part of IEC 60317 document,
the latter IEC 60317-38 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 60317-0-1:2013 applies.
4 Dimensions
Clause 4 of IEC 60317-0-1:2013 applies.
5 Electrical resistance
Clause 5 of IEC 60317-0-1:2013 and IEC 60317-0-1:2013/AMD1:2019 applies.
6 Elongation
Clause 6 of IEC 60317-0-1:2013 applies.
7 Springiness
Clause 7 of IEC 60317-0-1:2013 applies.
8 Flexibility and adherence
Clause 8 of IEC 60317-0-1:2013 applies. For 8.4, the constant K used for the calculation of
the number of revolutions for the peel test shall be 110 mm.
9 Heat shock
Clause 9 of IEC 60317-0-1:2013 applies. The minimum heat shock temperature shall be
220 °C.
10 Cut-through
No failure shall occur within 2 min at 320 °C.

REDLINE VERSION – 8 – IEC 60317-38:2013+AMD1:2024 CSV
© IEC 2024
11 Resistance to abrasion (nominal conductor diameters from 0,250 mm up to
and including 1,600 mm)
The wire shall meet the requirements given in Table 1.
For intermediate nominal conductor diameters, the value of the next larger nominal conductor
diameter shall be taken.
Table 1 – Resistance to abrasion
Grade 1B Grade 2B
Nominal conductor
Minimum average Minimum force to Minimum average Minimum force to
diameter
force to failure failure of each force to failure failure of each
measurement measurement
mm N N N N
0,250 3,00 2,55 4,90 4,15
0,280 3,25 2,75 5,25 4,45
0,315 3,50 2,95 5,65 4,80
0,355 3,75 3,20 6,05 5,15
0,400 4,05 3,45 6,50 5,50
0,450 4,35 3,70 7,00 5,90
0,500 4,65 3,95 7,50 6,35
0,560 5,00 4,25 8,00 6,80
0,630 5,35 4,55 8,60 7,30
0,710 5,70 4,85 9,20 7,80
0,800 6,10 5,15 9,90 8,40
0,900 6,55 5,55 10,6 9,00
1,000 7,05 5,95 11,3 9,60
1,120 7,60 6,45 12,1 10,2
1,250 8,20 6,95 12,9 11,0
1,400 8,80 7,45 13,9 11,8
1,600 9,45 8,00 14,9 12,6
12 Resistance to solvents
Test inappropriate.
13 Breakdown voltage
Clause 13 of IEC 60317-0-1:2013 applies. The elevated temperature shall be 200 °C.
14 Continuity of insulation
Clause 14 of IEC 60317-0-1:2013 applies.

© IEC 2024
15 Temperature index
Clause 15 of IEC 60317-0-1:2013 applies. The minimum temperature index shall be 200.
16 Resistance to refrigerants
Test inappropriate.
17 Solderability
Test inappropriate.
18 Heat or solvent bonding
18.1 Heat bonding
18.1.1 Heat bonding strength of a helical coil
18.1.1.1 At room temperature
The specimens shall be prepared according to the test method, and the temperature of the
oven for bonding shall be fixed as agreed between purchaser and supplier for the different
types of bonding enamels. The suggested temperature for polyamide bonding enamel is
(200 ± 2) °C and the suggested temperature for aromatic polyamide bonding enamel is
(230 ± 2) °C.
Results: when testing the specimens according to the test method, under the action of load
specified in Table 2, no turns (other than possibly the first and the last) shall separate.
18.1.1.2 At elevated temperature
The specimens shall be prepared and shall be conditioned as described in the test method.
The elevated temperature shall be fixed as agreed between purchaser and supplier for
the different types of bonding enamels. The suggested temperature for polyamide bonding
enamel is (155 ± 2) °C and the suggested temperature for aromatic polyamide bonding
enamel is (170 ± 2) °C.
Results: when testing the specimens according to the test method, under the action of load
specified in Table 2, no turns (other than possibly the first and the last) shall separate.

REDLINE VERSION – 10 – IEC 60317-38:2013+AMD1:2024 CSV
© IEC 2024
Table 2 – Loads
Nominal conductor diameter Load
mm N
Room Elevated
Over Up to and including
temperature temperature
a a
– 0,050
0,050 0,071 0,05 0,04
0,071 0,100 0,08 0,06
0,100 0,160 0,12 0,08
0,160 0,200 0,25 0,19
0,200 0,315 0,35 0,25
0,315 0,400 0,70 0,55
0,400 0,500 1,10 0,80
0,500 0,630 1,60 1,20
0,630 0,710 2,20 1,70
0,710 0,800 2,80 2,10
0,800 0,900 3,40 2,60
0,900 1,000 4,20 3,20
1,000 1,120 5,00 3,80
1,120 1,250 5,80 4,40
1,250 1,400 6,50 4,90
1,400 1,600 8,50 6,40
a
For nominal conductor diameters up to and including 0,050 mm, the test method and requirements shall be
agreed between purchaser and supplier.

18.1.2 Bond strength on a twisted coil
18.1.2.1 General
This test shall be considered only as a special test and is applicable to the diameter
0,315 mm.
18.1.2.2 At room temperature
When prepar
...

IEC 60317-38 ®
Edition 2.0 2013-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –
Part 38: Polyester or polyesterimide overcoated with polyamide-imide,
enamelled round copper wire, class 200, with a bonding layer

Spécifications pour types particuliers de fils de bobinage –
Partie 38: Fil de section circulaire en cuivre émaillé avec polyester ou
polyesterimide et avec surcouche polyamide-imide, classe 200, avec une couche
adhérente
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IEC 60317-38 ®
Edition 2.0 2013-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –

Part 38: Polyester or polyesterimide overcoated with polyamide-imide,

enamelled round copper wire, class 200, with a bonding layer

Spécifications pour types particuliers de fils de bobinage –

Partie 38: Fil de section circulaire en cuivre émaillé avec polyester ou

polyesterimide et avec surcouche polyamide-imide, classe 200, avec une couche

adhérente
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX M
ICS 29.060.10 ISBN 978-2-8322-1139-7

– 2 – 60317-38 © IEC:2013
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 . 6
3.2.1 Methods of test . 6
3.2.2 Winding wire . 6
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 (nominal conductor diameters from 0,250 mm up to and
including 1,600 mm) . 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 . 9
18 Heat or solvent bonding . 9
18.1 Heat bonding . 9
18.1.1 Heat bonding strength of a helical coil . 9
18.1.2 Bond strength on a twisted coil . 10
18.2 Solvent bonding . 11
19 Dielectric dissipation factor . 11
20 Resistance to transformer oil . 11
21 Loss of mass . 11
23 Pin hole test . 11
30 Packaging . 11
Bibliography . 12

Table 1 – Resistance to abrasion . 8
Table 2 – Loads . 10

60317-38 © IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –

Part 38: Polyester or polyesterimide overcoated with polyamide-imide,
enamelled round copper wire, class 200, with a bonding layer

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 60317-38 has been prepared by IEC technical committee 55:
Winding wires.
This second edition cancels and replaces the first edition published in 1992,
Amendment 1:1997 and Amendment 2:1999. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– new 3.2.2 containing general notes on winding wire, formerly a part of the scope;
– revision to references to IEC 60317-0-1:2013 to clarify that their application is normative;
– new Clause 23, Pin hole test.

– 4 – 60317-38 © IEC:2013
The text of this standard is based on the following documents:
FDIS Report on voting
55/1419/FDIS 55/1440/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.
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 20 and 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 publication will remain unchanged until
the stability 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.
60317-38 © IEC:2013 – 5 –
INTRODUCTION
This part of IEC 60317 is one of a series which deals with insulated wires used for windings in
electrical equipment. The series has three groups describing:
1) Winding wires – Test methods (IEC 60851);
2) Specifications for particular types of winding wires (IEC 60317);
3) Packaging of winding wires (IEC 60264).

– 6 – 60317-38 © IEC:2013
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –

Part 38: Polyester or polyesterimide overcoated with polyamide-imide,
enamelled round copper wire, class 200, with a bonding layer

1 Scope
This part of IEC 60317 specifies the requirements of enamelled round copper winding wire of
class 200 with a triple coating. The underlying coating is based on polyester or polyesterimide
resin, which may be modified providing it retains the chemical identity of the original resin and
meets all specified wire requirements. The secondary coating is based on polyamide-imide
resin. The third coating is a bonding layer based on a thermoplastic or thermosetting 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 diameters covered by this part is:
– Grade 1B: 0,050 mm up to and including 1,600 mm;
– Grade 2B: 0,050 mm up to and including 1,600 mm.
The nominal conductor diameters are specified in Clause 4 of IEC 60317-0-1:2013.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60317-0-1:2013, Specifications for particular types of winding wires – Part 0-1: General
requirements – Enamelled round copper wire
3 Terms, definitions, general notes and appearance
3.1 Terms and definitions
Subclause 3.1 of IEC 60317-0-1:2013 applies.
3.2 General notes
3.2.1 Methods of test
Subclause 3.2.1 of IEC 60317-0-1:2013 applies. In case of inconsistencies between
IEC 60317-0-1:2013 and this part of IEC 60317, the latter 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.

60317-38 © IEC:2013 – 7 –
3.3 Appearance
Subclause 3.3 of IEC 60317-0-1:2013 applies.
4 Dimensions
Clause 4 of IEC 60317-0-1:2013 applies.
5 Electrical resistance
Clause 5 of IEC 60317-0-1:2013 applies.
6 Elongation
Clause 6 of IEC 60317-0-1:2013 applies.
7 Springiness
Clause 7 of IEC 60317-0-1:2013 applies.
8 Flexibility and adherence
Clause 8 of IEC 60317-0-1:2013 applies. For 8.4, the constant K used for the calculation of
the number of revolutions for the peel test shall be 110 mm.
9 Heat shock
Clause 9 of IEC 60317-0-1:2013 applies. The minimum heat shock temperature shall be
220 °C.
10 Cut-through
No failure shall occur within 2 min at 320 °C.
11 Resistance to abrasion (nominal conductor diameters from 0,250 mm up to
and including 1,600 mm)
The wire shall meet the requirements given in Table 1.
For intermediate nominal conductor diameters, the value of the next larger nominal conductor
diameter shall be taken.
– 8 – 60317-38 © IEC:2013
Table 1 – Resistance to abrasion
Grade 1B Grade 2B
Nominal conductor
Minimum average Minimum force to Minimum average Minimum force to
diameter
force to failure failure of each force to failure failure of each
measurement measurement
mm N N N N
0,250 3,00 2,55 4,90 4,15
0,280 3,25 2,75 5,25 4,45
0,315 3,50 2,95 5,65 4,80
0,355 3,75 3,20 6,05 5,15
0,400 4,05 3,45 6,50 5,50
0,450 4,35 3,70 7,00 5,90
0,500 4,65 3,95 7,50 6,35
0,560 5,00 4,25 8,00 6,80
0,630 5,35 4,55 8,60 7,30
0,710 5,70 4,85 9,20 7,80
0,800 6,10 5,15 9,90 8,40
0,900 6,55 5,55 10,6 9,00
1,000 7,05 5,95 11,3 9,60
1,120 7,60 6,45 12,1 10,2
1,250 8,20 6,95 12,9 11,0
1,400 8,80 7,45 13,9 11,8
1,600 9,45 8,00 14,9 12,6
12 Resistance to solvents
Test inappropriate.
13 Breakdown voltage
Clause 13 of IEC 60317-0-1:2013 applies. The elevated temperature shall be 200 °C.
14 Continuity of insulation
Clause 14 of IEC 60317-0-1:2013 applies.
15 Temperature index
Clause 15 of IEC 60317-0-1:2013 applies. The minimum temperature index shall be 200.
16 Resistance to refrigerants
Test inappropriate.
60317-38 © IEC:2013 – 9 –
17 Solderability
Test inappropriate.
18 Heat or solvent bonding
18.1 Heat bonding
18.1.1 Heat bonding strength of a helical coil
18.1.1.1 At room temperature
The specimens shall be prepared according to the test method, and the temperature of the
oven for bonding shall be fixed as agreed between purchaser and supplier for the different
types of bonding enamels. The suggested temperature for polyamide bonding enamel is
(200 ± 2) °C and the suggested temperature for aromatic polyamide bonding enamel is
(230 ± 2) °C.
Results: when testing the specimens according to the test method, under the action of load
specified in Table 2, no turns (other than possibly the first and the last) shall separate.
18.1.1.2 At elevated temperature
The specimens shall be prepared and shall be conditioned as described in the test method.
The elevated temperature shall be fixed as agreed between purchaser and supplier for
the different types of bonding enamels. The suggested temperature for polyamide bonding
enamel is (155 ± 2) °C and the suggested temperature for aromatic polyamide bonding
enamel is (170 ± 2) °C.
Results: when testing the specimens according to the test method, under the action of load
specified in Table 2, no turns (other than possibly the first and the last) shall separate.

– 10 – 60317-38 © IEC:2013
Table 2 – Loads
Nominal conductor diameter Load
mm N
Over Up to and including Room Elevated
temperature temperature
a a
– 0,050
0,050 0,071 0,05 0,04
0,071 0,100 0,08 0,06
0,100 0,160 0,12 0,08
0,160 0,200 0,25 0,19
0,200 0,315 0,35 0,25
0,315 0,400 0,70 0,55
0,400 0,500 1,10 0,80
0,500 0,630 1,60 1,20
0,630 0,710 2,20 1,70
0,710 0,800 2,80 2,10
0,800 0,900 3,40 2,60
0,900 1,000 4,20 3,20
1,000 1,120 5,00 3,80
1,120 1,250 5,80 4,40
1,250 1,400 6,50 4,90
1,400 1,600 8,50 6,40
a
For nominal conductor diameters up to and including 0,050 mm, the test method and requirements shall be
agreed between purchaser and supplier.

18.1.2 Bond strength on a twisted coil
18.1.2.1 General
This test shall be considered only
...