IEC 60317-27-4:2020

Specifications for particular types of winding wires - Part 27-4: Paper tape covered rectangular aluminium wire

IEC 60317-27-4:2020 specifies the requirements of paper tape covered rectangular aluminium winding wires. This covering consists of two or more layers of paper tape and is primarily intended for winding coils for oil immersed transformers. The range of nominal conductor dimensions covered by this document is:
– width: min. 2,00 mm max. 16,0 mm;
– thickness: min. 0,80 mm max. 5,60 mm.
The paper tapes included in this document are restricted to those specified in IEC 60554-1 and IEC 60554-3-5.

Spécifications pour types particuliers de fils de bobinage - Partie 27-4: Fil de section rectangulaire en aluminium recouvert de ruban papier

IEC 60317-27-4: 2020 spécifie les exigences relatives aux fils de bobinage de section rectangulaire en aluminium recouverts de ruban papier. Ce revêtement est constitué d'au moins deux couches de ruban papier et est essentiellement destiné au bobinage pour les transformateurs immergés dans l'huile.
La gamme des dimensions nominales des conducteurs couvertes par le présent document est:
– largeur: min. 2,00 mm max. 16,0 mm;
– épaisseur: min. 0,80 mm max. 5,60 mm.
Les rubans papier concernés par le présent document sont limités à ceux qui sont spécifiés dans l’IEC 60554-1 et l’IEC 60554-3-5.

General Information

• Status: Published
• Publication Date: 12-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: 27-May-2020
• Completion Date: 19-Jun-2020

Relations

• Amended By: IEC 60317-27-4:2020/AMD1:2024 - Amendment 1 - Specifications for particular types of winding wires - Part 27-4: Paper tape covered rectangular aluminium wire
• Effective Date: 05-Sep-2023

Overview

IEC 60317-27-4:2020 (with Amendment 1:2024) specifies requirements for paper tape covered rectangular aluminium winding wire. The standard covers conductors wrapped with two or more layers of cellulosic paper tape, primarily intended for winding coils in oil-immersed transformers. Nominal aluminium conductor sizes addressed are:

• Width: 2.00 mm to 16.0 mm
• Thickness: 0.80 mm to 5.60 mm

The paper tapes are limited to those defined in IEC 60554-1 and IEC 60554-3-5. IEC 60317-27-4 is intended to be used together with IEC 60317-0-9 (general requirements for enamelled rectangular aluminium wire).

Key topics

The standard defines technical requirements, inspection and testing relevant to paper-taped rectangular aluminium winding wires. Main topics include:

• Dimensions and tolerances – nominal conductor dimensions, rounding of corners, and allowable increases due to paper covering (with agreed tolerances and maximum overall dimensions).
• Mechanical properties – elongation, springiness and flexibility (tests specified; certain flexibility/adherence criteria depend on paper layers).
• Electrical characteristics – electrical resistance, breakdown voltage and continuity of insulation.
• Durability and reliability tests – heat shock, cut-through, resistance to abrasion, solvents, refrigerants and transformer oil, and resistance to hydrolysis.
• Insulation quality – pin hole testing, dielectric dissipation factor and temperature index requirements.
• Manufacturing and finish – appearance, anchoring of tape ends (no adhesives except for anchorage), and solderability/heat/solvent bonding.
• Packaging – requirements for spool/reel presentation and protection for transport and storage.

Refer to the standard’s clause indexing (e.g., Clauses 4–21, 30) for specific test procedures and acceptance criteria.

Applications

IEC 60317-27-4 is specifically targeted at:

• Transformer manufacturers specifying insulated aluminium rectangular conductors for oil-immersed transformer windings.
• Winding wire producers and converters applying paper tape coverings to aluminium conductors.
• Quality, test and inspection labs performing acceptance and type testing of covered aluminium winding wire.
• Procurement and specification engineers who need standardized references for materials used in power transformers and similar apparatus.

Using this standard ensures compatibility of conductor dimensions, insulation performance, and long-term reliability in oil-immersed electrical equipment.

Related standards

• IEC 60317-0-9 – General requirements for enamelled rectangular aluminium wire (to be used in conjunction).
• IEC 60554-1 and IEC 60554-3-5 – Specifications for cellulosic papers for electrical purposes (paper tape materials referenced).

Keywords: IEC 60317-27-4, paper tape covered rectangular aluminium wire, winding wire standard, oil-immersed transformer coils, aluminium winding wire, insulation tests, IEC winding wires.

Standards Content (Sample)

IEC 60317-27-4 ®
Edition 1.1 2024-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Specifications for particular types of winding wires –
Part 27-4: Paper tape covered rectangular aluminium wire

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC 60317-27-4 ®
Edition 1.1 2024-06
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Specifications for particular types of winding wires –
Part 27-4: Paper tape covered rectangular aluminium wire
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.060.10 ISBN 978-2-8322-9191-7
REDLINE VERSION – 2 – IEC 60317-27-4:2020+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 . 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 Tolerance on conductor dimensions . 7
4.3 Rounding of corners . 7
4.4 Increase in dimensions due to paper tape covering . 7
4.5 Maximum overall dimensions . 8
5 Electrical resistance . 8
6 Elongation . 8
7 Springiness . 8
8 Flexibility and adherence . 8
9 Heat shock . 8
10 Cut-through . 8
11 Resistance to abrasion . 9
12 Resistance to solvents . 9
13 Breakdown voltage . 9
14 Continuity of insulation . 9
15 Temperature index . 9
16 Resistance to refrigerants . 9
17 Solderability . 9
18 Heat or solvent bonding . 9
19 Dielectric dissipation factor . 9
20 Resistance to hydrolysis and to transformer oil . 9
21 Loss of mass . 9
23 Pin hole test . 9
30 Packaging . 10
Bibliography . 11

Table 1 – Increase in dimensions . 8

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

Part 27-4: Paper tape covered rectangular aluminium wire

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
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
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may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 60317-27-4 edition 1.1 contains the first edition (2020-05) [documents 55/1837/FDIS
and 55/1859/RVD] and its amendment 1 (2024-06) [documents 55/1987/CDV and
55/2025/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 60317-27-4:2020+AMD1:2024 CSV
© IEC 2024
International Standard IEC 60317-27-4 has been prepared by IEC technical committee 55:
Winding wires.
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 60317-0-9:2015 and its
Amendment 1:2024.
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 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 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).

REDLINE VERSION – 6 – IEC 60317-27-4:2020+AMD1:2024 CSV
© IEC 2024
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –

Part 27-4: Paper tape covered rectangular aluminium wire

1 Scope
This part of IEC 60317 specifies the requirements of paper tape covered rectangular aluminium
winding wires. This covering consists of two or more layers of paper tape and is primarily
intended for winding coils for oil immersed transformers.
The range of nominal conductor dimensions covered by this document is:
– width: min. 2,00 mm max. 16,0 mm;
– thickness: min. 0,80 mm max. 5,60 mm.
The paper tapes included in this document are restricted to those specified in IEC 60554-1 and
IEC 60554-3-5.
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 60317-0-9:2015, Specifications for particular types of winding wires – Part 0-9: General
requirements – Enamelled rectangular aluminium wire
IEC 60317-0-9:2015/AMD1:2024
IEC 60554-1, Specification for cellulosic papers for electrical purposes – Part 1: Definitions and
general requirements
IEC 60554-3-5, Specification for cellulosic papers for electrical purposes – Part 3:
Specifications for individual materials – Sheet 5: Special papers
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 60317-0-9 and the
following 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
3.1.1
covering
material which is wound, wrapped or braided around a bare or insulated conductor
[SOURCE: IEC 60317-0-6:2020, 3.1.3]

© IEC 2024
3.2 General notes
3.2.1 Methods of test
Subclause 3.2.1 of IEC 60317-0-9:2015/AMD1:2024 applies. In case of inconsistency between
IEC 60317-0-9:2015 and this document, IEC 60317-27-4 shall prevail.
3.2.2 Winding wire
The number of paper tapes, type of paper, paper tape thickness, and the degree of overlap
shall be agreed upon between the purchaser and supplier.
When a reference is made to winding wire according to this document, the following information
shall be given in the description:
– reference to IEC 60317-27-4;
– nominal conductor dimensions in millimetres (width × thickness);
– nominal increase in dimensions due to paper.
EXAMPLE: IEC 60317-27-4 4, 00 × 1,00 + 0,20
– (Eventually) Proof stress minimum (and maximum) value
EXAMPLE: IEC 60317-0-9 4, 00 × 1,00 + 0,20
IEC 60317-0-9 7,00 × 2,50 + 1,00 R p0,2 = 150 MPa
3.3 Appearance
The conductor shall be essentially free from aluminium dust and other extraneous matter when
examined with normal vision, as wound on the original spool or reel. The paper covering shall
be of one or more tapes wrapped firmly, closely, evenly, and continuously around the conductor.
No bonding or adhesive material shall be used except to anchor the ends of paper tapes.
4 Dimensions
4.1 Conductor dimensions
Subclause 4.1 of IEC 60317-0-9:2015 applies.
4.2 Tolerance on conductor dimensions
Subclause 4.2 of IEC 60317-0-9:2015 applies.
4.3 Rounding of corners
Subclause 4.3 of IEC 60317-0-9:2015 applies.
4.4 Increase in dimensions due to paper tape covering
The increase in width or thickness due to the paper tape covering shall be agreed between
purchaser and supplier and the minus tolerance shall not exceed the values given in Table 1.
The increase in width due to the paper covering shall be equal to or less than the increase in
thickness.
The maximum increase may be exceeded, provided that the maximum overall dimension does
not exceed the sum of the maximum dimensions of the conductor plus the maximum increase
given in Table 1.
REDLINE VERSION – 8 – IEC 60317-27-4:2020+AMD1:2024 CSV
© IEC 2024
Table 1 – Increase in dimensions
Increase in diameters due to the paper covering Tolerance
mm %
Over Up to and including
−10
- 0,50
−7,5
0,50 1,25
−5
1,25 -
4.5 Maximum overall dimensions
The overall dimensions shall not exceed the sum of the maximum bare dimensions given in 4.2
and the maximum increase in dimensions permitted in 4.4.
5 Electrical resistance
Clause 5 of IEC 60317-0-9:2015 and IEC 60317-0-9:2015/AMD1:2024 applies.
6 Elongation
Clause 6 of IEC 60317-0-9:2015 applies.
NOTE When the value of the proof strength of the aluminium 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
Test appropriate but no requirements specified.
Test inappropriate.
8 Flexibility and adherence
Because of the great variation in the number and the thickness of papers applied, the
requirements for flexibility shall be agreed between purchaser and supplier at the time of placing
the order.
9 Heat shock
Test inappropriate.
10 Cut-through
Test inappropriate.
© IEC 2024
11 Resistance to abrasion
Test inappropriate.
12 Resistance to solvents
Test inappropriate.
13 Breakdown voltage
Test inappropriate.
14 Continuity of insulation
Test inappropriate.
15 Temperature index
Test requirements under consideration.
16 Resistance to refrigerants
Test inappropriate.
17 Solderability
Test inappropriate.
18 Heat or solvent bonding
Test inappropriate.
19 Dielectric dissipation factor
Test inappropriate.
20 Resistance to hydrolysis and to transformer oil
Test appropriate but no requirements specified.
21 Loss of mass
Test inappropriate.
23 Pin hole test
Test inappropriate.
...

IEC 60317-27-4 ®
Edition 1.0 2020-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –
Part 27-4: Paper tape covered rectangular aluminium wire

Spécifications pour types particuliers de fils de bobinage –
Partie 27-4: Fil de section rectangulaire en aluminium recouvert de ruban papier

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IEC 60317-27-4 ®
Edition 1.0 2020-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Specifications for particular types of winding wires –

Part 27-4: Paper tape covered rectangular aluminium wire

Spécifications pour types particuliers de fils de bobinage –

Partie 27-4: Fil de section rectangulaire en aluminium recouvert de ruban papier

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.10 ISBN 978-2-8322-8417-9

– 2 – IEC 60317-27-4:2020 © 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 . 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 Tolerance on conductor dimensions . 7
4.3 Rounding of corners . 7
4.4 Increase in dimensions due to paper tape covering . 7
4.5 Maximum overall dimensions . 8
5 Electrical resistance . 8
6 Elongation . 8
7 Springiness . 8
8 Flexibility and adherence . 8
9 Heat shock . 8
10 Cut-through . 8
11 Resistance to abrasion . 8
12 Resistance to solvents . 9
13 Breakdown voltage . 9
14 Continuity of insulation . 9
15 Temperature index . 9
16 Resistance to refrigerants . 9
17 Solderability . 9
18 Heat or solvent bonding . 9
19 Dielectric dissipation factor . 9
20 Resistance to hydrolysis and to transformer oil . 9
21 Loss of mass . 9
23 Pin hole test . 9
30 Packaging . 9
Bibliography . 11

Table 1 – Increase in dimensions . 8

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

Part 27-4: Paper tape covered rectangular aluminium wire

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 60317-27-4 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
55/1837/FDIS 55/1859/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 used in conjunction with IEC 60317-0-9:2015.
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.

– 4 – IEC 60317-27-4:2020 © IEC 2020
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).

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SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –

Part 27-4: Paper tape covered rectangular aluminium wire

1 Scope
This part of IEC 60317 specifies the requirements of paper tape covered rectangular aluminium
winding wires. This covering consists of two or more layers of paper tape and is primarily
intended for winding coils for oil immersed transformers.
The range of nominal conductor dimensions covered by this document is:
– width: min. 2,00 mm max. 16,0 mm;
– thickness: min. 0,80 mm max. 5,60 mm.
The paper tapes included in this document are restricted to those specified in IEC 60554-1 and
IEC 60554-3-5.
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 60317-0-9:2015, Specifications for particular types of winding wires – Part 0-9: General
requirements – Enamelled rectangular aluminium wire
IEC 60554-1, Specification for cellulosic papers for electrical purposes – Part 1: Definitions and
general requirements
IEC 60554-3-5, Specification for cellulosic papers for electrical purposes – Part 3:
Specifications for individual materials – Sheet 5: Special papers
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 60317-0-9 and the
following 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
3.1.1
covering
material which is wound, wrapped or braided around a bare or insulated conductor
[SOURCE: IEC 60317-0-6:2020, 3.1.3]

3.2 General notes
3.2.1 Methods of test
Subclause 3.2.1 of IEC 60317-0-9:2015 applies. In case of inconsistency between
IEC 60317‑0‑9:2015 and this document, IEC 60317-27-4 shall prevail.
3.2.2 Winding wire
The number of paper tapes, type of paper, paper tape thickness, and the degree of overlap
shall be agreed upon between the purchaser and supplier.
When a reference is made to winding wire according to this document, the following information
shall be given in the description:
– reference to IEC 60317-27-4;
– nominal conductor dimensions in millimetres (width × thickness);
– nominal increase in dimensions due to paper.
EXAMPLE: IEC 60317-27-4 4, 00 × 1,00 + 0,20
– (Eventually) Proof stress minimum (and maximum) value
EXAMPLE: IEC 60317-0-9 4, 00 × 1,00 + 0,20
IEC 60317-0-9 7,00 × 2,50 + 1,00 R p0,2 = 150 MPa
3.3 Appearance
The conductor shall be essentially free from aluminium dust and other extraneous matter when
examined with normal vision, as wound on the original spool or reel. The paper covering shall
be of one or more tapes wrapped firmly, closely, evenly, and continuously around the conductor.
No bonding or adhesive material shall be used except to anchor the ends of paper tapes.
4 Dimensions
4.1 Conductor dimensions
Subclause 4.1 of IEC 60317-0-9:2015 applies.
4.2 Tolerance on conductor dimensions
Subclause 4.2 of IEC 60317-0-9:2015 applies.
4.3 Rounding of corners
Subclause 4.3 of IEC 60317-0-9:2015 applies.
4.4 Increase in dimensions due to paper tape covering
The increase in width or thickness due to the paper tape covering shall be agreed between
purchaser and supplier and the minus tolerance shall not exceed the values given in Table 1.
The increase in width due to the paper covering shall be equal to or less than the increase in
thickness.
The maximum increase may be exceeded, provided that the maximum overall dimension does
not exceed the sum of the maximum dimensions of the conductor plus the maximum increase
given in Table 1.
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Table 1 – Increase in dimensions
Increase in diameters due to the paper covering Tolerance
mm %
Over Up to and including
−10
- 0,50
−7,5
0,50 1,25
−5
1,25 -
4.5 Maximum overall dimensions
The overall dimensions shall not exceed the sum of the maximum bare dimensions given in 4.2
and the maximum increase in dimensions permitted in 4.4.
5 Electrical resistance
Clause 5 of IEC 60317-0-9:2015 applies.
6 Elongation
Clause 6 of IEC 60317-0-9:2015 applies.
NOTE When the value of the proof strength of the aluminium 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
Test appropriate but no requirements specified.
8 Flexibility and adherence
Because of the great variation in the number and the thickness of papers applied, the
requirements for flexibility shall be agreed between purchaser and supplier at the time of placing
the order.
9 Heat shock
Test inappropriate.
10 Cut-through
Test inappropriate.
11 Resistance to abrasion
Test inappropriate.
12 Resistance to solvents
Test inappropriate.
13 Breakdown voltage
Test inappropriate.
14 Continuity of insulation
Test inappropriate.
15 Temperature index
Test requirements under consideration.
16 Resistance to refrig
...