IEC 60317-80:2019

Specifications for particular types of winding wires - Part 80: Polyvinyl acetal enamelled rectangular copper wire, class 120, with a bonding layer

IEC 60317-80: 2019 specifies the requirements of enamelled rectangular copper winding wire of class 120 with a dual coating. The underlying coating is based on polyvinyl acetal resin, which can be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements. The second 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 dimensions covered by this document is:
width: min. 2,00 mm max. 16,00 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 nominal width and thickness as well as the specified ratio width/thickness are given in IEC 60317-0-2:2019.
Keywords: insulated wires used for windings

Spécifications pour types particuliers de fils de bobinage - Partie 80: Fil de section rectangulaire en cuivre émaillé avec acétal de polyvinyle, classe 120, avec une couche adhérente

IEC 60317-80:2019 spécifie les exigences relatives aux fils de bobinage de section rectangulaire en cuivre émaillé de classe 120 avec un double revêtement. La sous-couche est à base de résine acétal de polyvinyle, 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 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 les résultats obtenus ou les caractéristiques d'utilisation. La gamme des dimensions nominales des conducteurs couverte par le présent document est:
largeur: min. 2,00 mm max. 16,00 mm;
épaisseur: min. 0,80 mm max. 5,60 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 nominales ainsi que le rapport largeur/épaisseur spécifié sont indiqués dans l'IEC 60317-0-2:2019.
Mots clés : fils isolés utilisés pour les enroulements

General Information

• Status: Published
• Publication Date: 20-Aug-2019
• 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: 21-Aug-2019
• Completion Date: 20-Sep-2019

Overview

IEC 60317-80:2019 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies the requirements for a specific type of winding wire used in electrical equipment. This standard focuses on polyvinyl acetal enamelled rectangular copper wire, class 120, with a bonding layer. It covers the materials, dimensions, electrical properties, and performance criteria for insulated copper winding wires designed for applications requiring a thermal class rating of 120.

The standard defines a dual coating system:

• An underlying enamel based on polyvinyl acetal resin, which may be chemically modified without losing its original resin identity or performance requirements.
• A secondary bonding layer made from either a thermoplastic or thermosetting resin to enhance adhesion and durability.

IEC 60317-80:2019 supports a wide range of nominal conductor sizes, with widths from 2.00 mm to 16.00 mm and thicknesses from 0.80 mm to 5.60 mm, accommodating various electrical and mechanical design needs.

Key Topics

• Material Specification:
  The primary insulation is based on polyvinyl acetal resin, known for chemical stability and thermal endurance. Modifications to this resin are allowed to improve performance, provided the resin’s chemical characteristics remain consistent.

• Thermal Class 120:
  This thermal classification ensures the wire insulation system can withstand operating temperatures up to 120 °C, with heat shock testing confirming resistance to 155 °C. This characteristic is critical for ensuring reliability in electrical windings exposed to elevated temperatures.

• Dual Coating System:
  The inclusion of a bonding layer improves wire handling, layering, and mechanical strength in winding applications, enabling secure adhesion of the enamel layers.

• Dimension and Grade Compliance:
  The standard specifies conductor parameters including width, thickness, and width/thickness ratios as detailed in IEC 60317-0-2:2019. Both grade 1 and grade 2 classifications are included, ensuring comprehensive coverage of performance tiers.

• Testing Methods and Performance Criteria:
  The document outlines rigorous tests for electrical resistance, elongation, springiness, flexibility, adherence, heat shock, abrasion resistance, solvent resistance, breakdown voltage, insulation continuity, temperature index, resistance to refrigerants and transformer oils, solderability, dielectric properties, pinhole detection, and packaging standards.

Applications

IEC 60317-80:2019 certified wires are primarily used as insulated winding wires in electrical machines and components such as:

• Electric motors and generators
• Transformers
• Electromagnetic coils and inductors
• High-performance electrical devices requiring robust thermal and mechanical wire insulation

The polyvinyl acetal enamelled rectangular wire with a bonding layer enhances manufacturability and operational durability, offering improved insulation integrity and mechanical bonding during coil winding. The class 120 rating ensures performance in applications with elevated operating temperatures, helping extend equipment life and reliability.

Related Standards

For full application and compliance, IEC 60317-80:2019 is intended to be used in conjunction with related standards including:

• IEC 60317-0-2:2019: General requirements and specifications for enamelled rectangular copper wires, detailing conductor dimensions and ratios.
• IEC 60851-4:2016: Test methods for chemical properties of winding wires, which inform quality assurance and material validation.
• Other parts of the IEC 60317 series, which specify particular winding wire types and packaging requirements.
• IEC 60264 series for packaging standards of winding wires, ensuring proper handling and preservation.

Practical Value

Using IEC 60317-80:2019 ensures engineers and manufacturers have access to well-defined, internationally recognized specifications for polyvinyl acetal enamelled rectangular copper wire that guarantee:

• Consistency in wire dimensions and materials for optimized winding performance
• Reliable thermal and mechanical properties suitable for demanding electrical environments
• Clear testing protocols to verify insulation integrity and electrical safety
• Compatibility with modern coil winding processes due to bonding layer technology

Adherence to this standard facilitates international trade, product certification, and interoperability of electrical apparatus components, ensuring system robustness in supplied electrical windings.

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Keywords: insulated wires used for windings, polyvinyl acetal enamelled wire, class 120 winding wire, rectangular copper wire, dual coating winding wire, IEC winding wire standards, electrical wire insulation, bonding layer enamelled wire, thermal class 120 wire, IEC 60317-80:2019.

Standards Content (Sample)

IEC 60317-80 ®
Edition 1.0 2019-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –
Part 80: Polyvinyl acetal enamelled rectangular copper wire, class 120,
with a bonding layer
Spécifications pour types particuliers de fils de bobinage –
Partie 80: Fil de section rectangulaire en cuivre émaillé avec acétal
de polyvinyle, classe 120, avec une couche adhérente

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IEC 60317-80 ®
Edition 1.0 2019-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –

Part 80: Polyvinyl acetal enamelled rectangular copper wire, class 120,

with a bonding layer
Spécifications pour types particuliers de fils de bobinage –

Partie 80: Fil de section rectangulaire en cuivre émaillé avec acétal

de polyvinyle, classe 120, avec une couche adhérente

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.10 ISBN 978-2-8322-7309-8

– 2 – IEC 60317-80:2019 © IEC 2019
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
4.1 Conductor dimensions . 7
4.2 Enamel layer . 7
4.3 Bonding layer . 7
5 Electrical resistance . 7
6 Elongation . 7
7 Springiness . 7
8 Flexibility and adherence . 8
8.1 Mandrel winding test . 8
8.2 Adherence test . 8
9 Heat shock . 8
10 Cut-through . 8
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 . 9
17 Solderability . 9
18 Heat or solvent bonding . 9
18.1 Heat bonding . 9
18.1.1 Room temperature . 9
18.1.2 Elevated temperature . 9
18.2 Solvent bonding . 9
19 Dielectric dissipation factor . 9
20 Resistance to transformer oil . 9
21 Loss of mass . 9
23 Pin hole test . 9
30 Packaging . 9
Bibliography . 10

Table 1 – Mandrel winding . 8

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

Part 80: Polyvinyl acetal enamelled rectangular copper wire,
class 120, 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
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rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60317-80 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
55/1790/FDIS 55/1802/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.
This International Standard is to be read in conjunction with IEC 60317-0-2:2019.

– 4 – IEC 60317-80:2019 © IEC 2019
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. 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 60317-80:2019 © IEC 2019
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –

Part 80: Polyvinyl acetal enamelled rectangular copper wire,
class 120, with a bonding layer

1 Scope
This part of IEC 60317 specifies the requirements of enamelled rectangular copper winding wire
of class 120 with a dual coating. The underlying coating is based on polyvinyl acetal resin,
which can be modified providing it retains the chemical identity of the original resin and meets
all specified wire requirements. The second 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 dimensions covered by this document is:
– width: min. 2,00 mm max. 16,00 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 nominal width and thickness as well as the specified ratio
width/thickness are given in IEC 60317-0-2:2019.
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 60317-0-2:2019 , Specifications for particular types of winding wires – Part 0-2: General
requirements – Enamelled rectangular copper wire
IEC 60851-4:2016, Winding wires – Test methods – Part 4: Chemical properties
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 60317-0-2:2019 apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
___________
Under preparation. Stage at the time of publication: IEC CDV 60317-0-2:2019.

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.2 General notes
3.2.1 Methods of test
Subclause 3.2.1 of IEC 60317-0-2:2019 applies. In case of inconsistencies between IEC 60317-
0-2:2019 and this part of IEC 60317, this document IEC 60317-80 shall prevail.
3.2.2 Winding wire
Class 120 is a thermal class that requires a minimum temperature index of 120 and a heat
shock temperature of at least 155 °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 60317-0-2:2019 applies.
4 Dimensions
4.1 Conductor dimensions
Subclause 4.1 of IEC 60317-0-2:2019 applies.
4.2 Enamel layer
Subclause 4.2 of IEC 60317-0-2:2019 applies.
4.3 Bonding layer
Clause 4.4.2 of IEC 60317-0-2:2019 applies.
5 Electrical resistance
Clause 5 of IEC 60317-0-2:2019 applies.
6 Elongation
Clause 6 of IEC 60317-0-2:2019 applies.
NOTE When the value of the proof strength of the copper is specified between minimum and maximum limits, the
requirements are agreed upon between the purchaser and supplier. The description of the term “proof strength” and
the method of determination are given in ISO 6892-1:2016.
7 Springiness
Clause 7 of IEC 60317-0-2:2019 applies.

– 8 – IEC 60317-80:20
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