IEC 60317-51:2014

Specifications for particular types of winding wires - Part 51: Solderable polyurethane enamelled round copper wire, class 180

IEC 60317-51:2014 specifies the requirements of solderable enamelled round copper winding wire of class 180 with a sole coating based on polyurethane resin, which may be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements. The range of nominal conductor diameters covered by this standard is as follows:
- Grade 1: 0,018 mm up to and including 1,000 mm;
- Grade 2: 0,020 mm up to and including 1,000 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 2001. 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;
- new 3.3 containing requirements for appearance;
- revision to references to IEC 60317-0-1:2013 to clarify that their application is normative;
- New Clause 23, Pin hole test. Keywords: solderable enamelled round copper winding wire of class 180, polyurethane resin
This publication is to be read in conjunction with IEC 60317-0-1:2013

Spécifications pour types particuliers de fils de bobinage - Partie 51: Fil brasable de section circulaire en cuivre émaillé avec polyuréthane, classe 180

L'IEC 60317-51:2014 spécifie les exigences relatives au fil de bobinage brasable de section circulaire en cuivre émaillé de classe 180 avec un revêtement unique à base de résine polyuréthane, 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 gamme des diamètres nominaux des conducteurs couverte par la présente norme est la suivante:
- Grade 1: de 0,018 mm jusques et y compris 1,000 mm;
- Grade 2: de 0,020 mm jusques et y compris 1,000 mm. Les diamètres nominaux des conducteurs sont spécifiés dans l'Article 4 de la IEC 60317-0-1:2013. Cette deuxième édition annule et remplace la première édition parue en 2001. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- un nouveau 3.2.2 contenant des notes générales sur le fil de bobinage intégrées auparavant au domaine d'application;
- un nouveau 3.3 contenant des exigences relatives à l'aspect;
- la révision des références à l'IEC 60317-0-1:2013, pour bien établir que leur application est normative;
- un nouvel Article 23, Détection des microfissures en immersion. Mots clés: fil de bobinage brasable de section circulaire en cuivre émaillé de classe 180, résine polyuréthane
Cette publication doit être lue conjointement avec l'>

General Information

• Status: Published
• Publication Date: 11-Feb-2014
• 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: 12-Feb-2014
• Completion Date: 15-May-2014

Relations

• Revises: IEC 60317-51:2001 - Specifications for particular types of winding wires - Part 51: Solderable polyurethane enamelled round copper wire, class 180
• Effective Date: 05-Sep-2023

Overview

IEC 60317-51:2014 is an international standard published by the International Electrotechnical Commission (IEC) that specifies requirements for solderable polyurethane enamelled round copper wire of thermal class 180. This enamelled winding wire features a sole coating based on polyurethane resin, which may be chemically modified but must retain the resin's original chemical identity and meet all specified performance criteria. The standard covers nominal conductor diameters ranging from 0.018 mm to 1.000 mm for Grade 1 and 0.020 mm to 1.000 mm for Grade 2.

As a part of the IEC 60317 series, this publication serves as a critical guideline for manufacturers and users of winding wires in electrical equipment, ensuring consistent quality and reliability for wires that demand high thermal resistance and solderability.

Key Topics

• Thermal Class 180 Compliance: The wire must achieve a minimum temperature index of 180 °C and withstand a heat shock temperature of at least 200 °C, suitable for demanding electrical environments.
• Polyurethane Resin Coating: The enamel coating is polyurethane-based, ensuring enhanced electrical insulation, mechanical strength, and solderability.
• Dimensional Range: Includes two grades:
  • Grade 1: 0.018 mm to 1.000 mm diameter
  • Grade 2: 0.020 mm to 1.000 mm diameter
• Physical and Electrical Properties:
  • Electrical resistance requirements
  • Mechanical properties such as elongation, springiness, flexibility, and adherence
  • Heat shock resistance and cut-through performance (no failure within 2 minutes at 230 °C)
  • Resistance to abrasion and solvents, especially for wires with diameters from 0.250 mm to 1.000 mm
• Solderability:
  • Specific provisions for soldering wires across different diameters to ensure reliable electrical connections.
• New Testing Protocols:
  • Introduction of the pinhole test to detect defects in insulation.
• Adherence to Normative References:
  • The standard is to be applied in conjunction with IEC 60317-0-1:2013, which covers general requirements and test methods for enamelled round copper wires.

Applications

IEC 60317-51:2014 solderable polyurethane enamelled round copper wires are primarily used in electrical winding applications, including:

• Electromagnetic Coils and Motors: Providing high thermal endurance and reliable electrical insulation in motor winding.
• Transformers and Inductors: Ensuring insulation integrity under thermal stress and mechanical wear.
• Electrical and Electronic Devices: Used in devices requiring precise solderability and robust insulation, such as relays and solenoids.
• High-Temperature Electrical Equipment: Suitable for applications exposed to elevated temperatures up to the class 180 thermal rating.
• Automotive and Industrial Controls: Where reliable solder connections and resistance to environmental factors like solvents and abrasion are critical.

The standard ensures that users can select wires that meet stringent quality and performance criteria to improve the long-term durability and functionality of electrical assemblies.

Related Standards

• IEC 60317-0-1:2013 - General requirements and test methods for enamelled round copper wire, which provides foundational guidance for the specifications in Part 51.
• IEC 60851 Series - Test methods for electrical insulating materials used in winding wires.
• IEC 60264 Series - Standards related to packaging of winding wires, important for proper storage and handling to prevent damage.
• Other parts of IEC 60317 - Specifications for various types of winding wires tailored to particular insulation materials or application requirements.

Adherence to IEC 60317-51:2014 in coordination with these related standards helps ensure product conformity, international compatibility, and optimized performance in applications requiring solderable polyurethane enamelled copper wires with class 180 thermal protection.

---

This standard is essential for electrical engineers, manufacturers, and quality assurance professionals involved in the production and application of winding wires in electrical equipment. It guarantees the use of high-quality solderable polyurethane enamelled copper wires that meet international benchmarks for electrical, mechanical, and thermal performance.

Standards Content (Sample)

IEC 60317-51 ®
Edition 2.0 2014-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –
Part 51: Solderable polyurethane enamelled round copper wire, class 180

Spécifications pour types particuliers de fils de bobinage –
Partie 51: Fil brasable de section circulaire en cuivre émaillé avec polyuréthane,
classe 180
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IEC 60317-51 ®
Edition 2.0 2014-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –

Part 51: Solderable polyurethane enamelled round copper wire, class 180

Spécifications pour types particuliers de fils de bobinage –

Partie 51: Fil brasable de section circulaire en cuivre émaillé avec polyuréthane,

classe 180
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX K
ICS 29.060.10 ISBN 978-2-8322-1419-0

– 2 – 60317-51 © IEC:2014
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 1,000 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
17.1 General . 9
17.2 Nominal conductor diameters up to and including 0,100 mm . 9
17.3 Nominal conductor diameters over 0,100 mm . 9
18 Heat or 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 – Resistance to abrasion . 8

60317-51 © IEC:2014 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SPECIFICATIONS FOR PARTICULAR TYPES
OF WINDING WIRES –
Part 51: Solderable polyurethane enamelled round
copper wire, class 180
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
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60317-51 has been prepared by IEC technical committee 55:
Winding wires.
This second edition cancels and replaces the first edition published in 2001. 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;
– new 3.3 containing requirements for appearance;
– revision to references to IEC 60317-0-1:2013 to clarify that their application is normative;
– New Clause 23, Pin hole test.

– 4 – 60317-51 © IEC:2014
The text of this standard is based on the following documents:
CDV Report on voting
55/1394/CDV 55/1456/RVC
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.
This International standard is to be read in conjunction with the IEC 60317-0-1:2013.
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.

60317-51 © IEC:2014 – 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 – 60317-51 © IEC:2014
SPECIFICATIONS FOR PARTICULAR TYPES
OF WINDING WIRES –
Part 51: Solderable polyurethane enamelled round
copper wire, class 180
1 Scope
This part of IEC 60317 specifies the requirements of solderable enamelled round copper
winding wire of class 180 with a sole coating based on polyurethane resin, which may be
modified providing it retains the chemical identity of the original resin and meets all specified
wire requirements.
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 standard is as follows:
– Grade 1: 0,018 mm up to and including 1,000 mm;
– Grade 2: 0,020 mm up to and including 1,000 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
For the purposes of this document, the terms and definitions given in 3.1 of IEC 60317-0-
1:2013 apply.
3.2 General notes
3.2.1 Methods of test
In case of inconsistencies between IEC 60317-0-1 and this standard, the latter shall prevail.
3.2.2 Winding wire
Class 180 is a thermal class that requires a minimum temperature index of 180 and a heat
shock temperature of at least 200 °C.

60317-51 © IEC:2014 – 7 –
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 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.
9 Heat shock
Clause 9 of IEC 60317-0-1:2013 applies. The minimum heat shock temperature shall be
200 °C.
10 Cut-through
No failure shall occur within 2 min at 230 °C.
11 Resistance to abrasion (nominal conductor
...