IEC 60317-70-2:2020

IEC 60317-70-2 ®
Edition 1.0 2020-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –
Part 70-2: Polyester glass-fibre wound resin/varnish impregnated, bare or
enamelled round copper wire, temperature index 155

Spécifications pour types particuliers de fils de bobinage –
Partie 70-2: Fil de section circulaire en cuivre nu ou émaillé, guipé de fibres de
verre polyester imprégnées de vernis ou de résine, d'indice de température 155

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IEC 60317-70-2 ®
Edition 1.0 2020-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –

Part 70-2: Polyester glass-fibre wound resin/varnish impregnated, bare or

enamelled round copper wire, temperature index 155

Spécifications pour types particuliers de fils de bobinage –

Partie 70-2: Fil de section circulaire en cuivre nu ou émaillé, guipé de fibres de

verre polyester imprégnées de vernis ou de résine, d'indice de température 155

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.10 ISBN 978-2-8322-8422-3

– 2 – IEC 60317-70-2:2020 © IEC 2020
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 . 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 . 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 . 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 . 9
30 Packaging . 9
Bibliography . 10

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

Part 70-2: Polyester glass-fibre wound resin/varnish impregnated,
bare or enamelled round copper wire, temperature index 155

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60317-70-2 has been prepared by IEC technical committee 55:
Winding wires.
IEC 60317-70-2 and IEC 60317-70-1 cancel and replace IEC 60317-70 published in 2017.
This document constitutes a technical revision.
The text of this International Standard is based on the following documents:
FDIS Report on voting
55/1846/FDIS 55/1862/RVD
Full information on the voting for the approval of this document can be found in the report on
voting indicated in the above table.

– 4 – IEC 60317-70-2:2020 © IEC 2020
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
This International Standard is to be used in conjunction with IEC 60317-0-10:2017.
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 60317-70-2:2020 © IEC 2020
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –

Part 70-2: Polyester glass-fibre wound resin/varnish impregnated,
bare or enamelled round copper wire, temperature index 155

1 Scope
This part of IEC 60317 specifies the requirements of polyester glass-fibre wound resin/varnish
impregnated bare, grade 1 or grade 2 enamelled round copper winding wires, temperature
index 155. The impregnating agent can be, for instance, epoxy, polyester, or polyesterimide
resin based.
The nominal conductor diameters are specified in Clause 4 of IEC 60317-0-10:2017.
NOTE For this type of wire, the heat shock test is inappropriate and therefore a heat shock temperature cannot be
established. Consequently, a class based on the requirements for temperature index and heat shock temperature
cannot be specified.
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 60317-0-10:2017, Specifications for particular types of winding wires – Part 0-10: General
requirements – Polyester glass-fibre wound fused, unvarnished, or resin or varnish
impregnated, bare or 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 IEC 60317-0-10:2017
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
3.2 General notes
3.2.1 Methods of test
Subclause 3.2.1 of IEC 60317-0-10:2017 applies. In case of inconsistencies between
IEC 60317-0-10 and this document, the latter shall prevail.

3.2.2 Winding wire
The fibre covering shall consist of a combination of polyester and glass fibres. The glass
fibres shall be electrical-grade continuous-filament glass yarn. The polyester fibre shall be a
high-grade yarn resulting from the linear polymerization of ethylene glycol and terephthalic
acid. The maximum content by weight of polyester fibre in the yarn shall not exceed 50 %.
The enamelled wire shall have a temperature index of at least 155 and shall be agreed
between purchaser and supplier.
The temperature index of the wire is dependent upon
...