IEC 60317-93:2023

Specifications for particular types of winding wires – Part 93: Polyester or polyesterimide overcoated with polyamide-imide enamelled rectangular copper wire, class 220

IEC 60317-93: 2023 specifies the requirements of enamelled rectangular copper winding wire of class 220 with a dual coating. The underlying coating is based on polyester or polyesterimide resin, which 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. 25,0 mm;
thickness: min. 0,80 mm max. 10,0 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 60317-0-2. This International Standard is to be used in conjunction with IEC 60317-0-2:2020.

Spécifications pour types particuliers de fils de bobinage - Partie 93: Fil de section rectangulaire en cuivre émaillé au polyamide-imide, avec émail sous-jacent en polyester ou polyestérimide, classe 220

IEC 60317-93: 2023 spécifie les exigences relatives aux fils de bobinage de section rectangulaire en cuivre émaillé de classe 220, avec un double revêtement. L’émail sous-jacent est à base de résine polyester ou polyestérimide, qui peut être modifiée sous réserve qu'elle conserve l'identité chimique de la résine initiale et respecte l'ensemble des exigences spécifiées du fil. La surcouche de revêtement est à base de résine 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 gamme des dimensions nominales des conducteurs couverte par la présente norme est:
largeur: min. 2,0 mm max. 25,0 mm;
épaisseur: min. 0,80 mm max. 10,0 mm.
Les fils de grade 1 et de grade 2 sont compris dans la présente spécification et s'appliquent à la gamme complète des conducteurs. Les combinaisons spécifiées de largeur et d'épaisseur, ainsi que le rapport largeur/épaisseur spécifié, sont donnés dans l’IEC 60317-0-2.
La présente Norme internationale doit être utilisée conjointement avec l'IEC 60317-0-2:2020.

General Information

• Status: Published
• Publication Date: 30-Jul-2023
• 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: 31-Jul-2023
• Completion Date: 25-Aug-2023

Overview

IEC 60317-93:2023 is an international standard developed by the International Electrotechnical Commission (IEC) that defines the requirements for a specific type of winding wire: enamelled rectangular copper wire of class 220, featuring a dual coating system. This standard covers wires coated first with polyester or polyesterimide resin, optionally modified for enhanced performance, and overcoated with polyamide-imide resin. These specifications are crucial for the consistent quality, performance, and reliability of winding wires used in electrical equipment.

The standard applies to wires with:

• Widths from 2.0 mm up to 25.0 mm
• Thicknesses from 0.80 mm up to 10.0 mm

Both grade 1 and grade 2 wires are included, as detailed in IEC 60317-0-2, which must be used in conjunction with IEC 60317-93:2023.

Key Topics

IEC 60317-93:2023 specifies the following key aspects for dual-coated rectangular copper winding wires:

• Materials and Coating:

  • Base layer of polyester or polyesterimide resin, which can be chemically modified if requirements are met
  • Superimposed layer of polyamide-imide resin

• Thermal Performance:

  • Class 220: Minimum temperature index of 220°C
  • Heat shock temperature not less than 240°C

• Dimensional Requirements:

  • Exact combinations and ratios of width and thickness must comply with IEC 60317-0-2

• Physical and Electrical Properties:

  • Requirements for electrical resistance, elongation, springiness, flexibility, and adherence
  • Specific methods of testing and appearance as referenced in the base standard (IEC 60317-0-2)

• Applicability:

  • Ensures the wire’s suitability for applications that require high thermal resistance and reliability

Applications

Enamelled rectangular copper winding wires meeting IEC 60317-93:2023 are widely used in:

• Transformers: Ensuring durable and high-performance windings for energy efficient operation and longevity.
• Motors and Generators: Where high-temperature endurance and electrical insulation are mission-critical.
• Electrical Reactors and Chokes: For precise inductance control and compact winding configurations.
• Other Electrical Equipment: Any application that demands a combination of mechanical strength, high-temperature performance, and reliable insulation.

These wires offer enhanced resistance to heat, abrasion, and chemicals, aligning with demanding operational environments in industrial, automotive, and power distribution sectors.

Related Standards

IEC 60317-93:2023 forms part of a comprehensive set of IEC standards for winding wires. Key related standards include:

• IEC 60317-0-2:2020 - General requirements for enamelled rectangular copper wire; must be used alongside IEC 60317-93.
• IEC 60317 Series - Specifications for various types of winding wires, addressing different materials and performance classes.
• IEC 60264 Series - Standards covering the packaging of winding wires for transportation and handling.
• IEC 60851 Series - Test methods for winding wires, ensuring uniform assessment for mechanical, electrical, and chemical properties.

These interconnected standards support manufacturers, quality assurance professionals, and electrical engineers in maintaining global conformity for winding wire products.

---

In summary, IEC 60317-93:2023 ensures consistency, high performance, and safety for polyester or polyesterimide overcoated with polyamide-imide enamelled rectangular copper wires, making it essential for applications requiring thermal class 220 reliability and optimal electrical insulation. Compliance with this standard guarantees compatibility in international markets and supports long-term performance in critical electrical devices.

Standards Content (Sample)

IEC 60317-93 ®
Edition 1.0 2023-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –
Part 93: Polyester or polyesterimide overcoated with polyamide-imide enamelled
rectangular copper wire, class 220

Spécifications pour types particuliers de fils de bobinage –
Partie 93: Fil de section rectangulaire en cuivre émaillé au polyamide-imide, avec
émail sous-jacent en polyester ou polyestérimide, classe 220
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IEC 60317-93 ®
Edition 1.0 2023-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –

Part 93: Polyester or polyesterimide overcoated with polyamide-imide enamelled

rectangular copper wire, class 220

Spécifications pour types particuliers de fils de bobinage –

Partie 93: Fil de section rectangulaire en cuivre émaillé au polyamide-imide, avec

émail sous-jacent en polyester ou polyestérimide, classe 220

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.10 ISBN 978-2-8322-7304-3

– 2 – IEC 60317-93:2023 © IEC 2023
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 hydrolysis and 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 93: Polyester or polyesterimide overcoated with polyamide-imide
enamelled rectangular copper wire, class 220

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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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 60317-93 has been prepared by IEC technical committee 55: Winding wires. It is an
International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
55/1940/CDV 55/1973/RVC
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 International Standard is to be used in conjunction with IEC 60317-0-2:2020.

– 4 – IEC 60317-93:2023 © IEC 2023
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.
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/publications.
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 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.
INTRODUCTION
This part of IEC 60317 belongs to a series of standards which deals with insulated wires used
for windings in electrical equipment. It is composed of the following series:
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 60317-93:2023 © IEC 2023
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –

Part 93: Polyester or polyesterimide overcoated with polyamide-imide
enamelled rectangular copper wire, class 220

1 Scope
This part of IEC 60317 specifies the requirements of enamelled rectangular copper winding wire
of class 220 with a dual coating. The underlying coating is based on polyester or polyesterimide
resin, which 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. 25,0 mm;
• thickness: min. 0,80 mm max. 10,0 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 60317-0-2.
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 60317-0-2:2020, Specifications for particular types of winding wires – Part 0-2: General
requirements – Enamelled rectangular copper wire
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 60317-0-2 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

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