Winding wires - Test methods - Part 3: Mechanical properties

IEC 60851-3:2009 specifies the following methods of test for winding wires:
- Test 6: Elongation;
- Test 7: Springiness;
- Test 8: Flexibility and adherence;
- Test 11: Resistance to abrasion;
- Test 18: Heat bonding.
With respect to the previous edition, significant technical changes appear in Subclause 5.3, Jerk test.

Fils de bobinage - Méthodes d'essai - Partie 3: Propriétés mécaniques

La CEI 60851-3:2009 spécifie les méthodes d'essai suivantes des fils de bobinage:
- Essai 6: Allongement;
- Essai 7: Effet de ressort;
- Essai 8: Souplesse et adhérence;
- Essai 11: Résistance à l'abrasion;
- Essai 18: Thermo-adhérence.
Par rapport à l'édition précédente, des modifications techniques majeures sont introduites au Paragraphe 5.3, Essai de traction brusque.

General Information

Status
Published
Publication Date
22-Aug-2019
Technical Committee
Drafting Committee
Current Stage
DELPUB - Deleted Publication
Start Date
13-May-2022
Completion Date
22-Aug-2023
Ref Project

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IEC 60851-3 ®
Edition 3.0 2009-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Winding wires – Test methods –
Part 3: Mechanical properties
Fils de bobinage – Méthodes d'essai –
Partie 3: Propriétés mécaniques

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or
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IEC 60851-3 ®
Edition 3.0 2009-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Winding wires – Test methods –
Part 3: Mechanical properties
Fils de bobinage – Méthodes d'essai –
Partie 3: Propriétés mécaniques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
X
CODE PRIX
ICS 29.060.10 ISBN 978-2-88910-311-9
– 2 – 60851-3 © IEC:2009
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Test 6: Elongation .7
3.1 Elongation at fracture .7
3.2 Tensile strength .7
4 Test 7: Springiness.8
4.1 Round wire with a nominal conductor diameter from 0,080 mm up to and
including 1,600 mm .8
4.1.1 Principle .8
4.1.2 Equipment .8
4.1.3 Procedure.9
4.2 Round wire with a nominal conductor diameter over 1,600 mm and
rectangular wire .10
4.2.1 Principle .10
4.2.2 Equipment .10
4.2.3 Specimen .11
4.2.4 Procedure.11
5 Test 8: Flexibility and adherence .12
5.1 Mandrel winding test .12
5.1.1 Round wire .12
5.1.2 Rectangular wire .13
5.1.3 Covered bunched wire.14
5.2 Stretching test (applicable to enamelled round wire with a nominal conductor
diameter over 1,600 mm).14
5.3 Jerk test (applicable to enamelled round wire with a nominal conductor
diameter up to and including 1,000 mm) .15
5.4 Peel test (applicable to enamelled round wire with a nominal conductor
diameter over 1,000 mm).15
5.5 Adherence test .17
5.5.1 Enamelled rectangular wire .17
5.5.2 Impregnated fibre covered round and rectangular wire .17
5.5.3 Fibre covered enamelled round and rectangular wire.17
5.5.4 Tape wrapped round and rectangular wire (for adhesive tape only) .18
6 Test 11: Resistance to abrasion (applicable to enamelled round wire) .18
6.1 Principle.18
6.2 Equipment.18
6.3 Procedure .19
7 Test 18: Heat bonding (applicable to enamelled round wire with a nominal
conductor diameter over 0,050 mm up to and including 2 000 mm).
7.1 Vertical bond retention of a helical coil .20
7.1.1 Nominal conductor diameter up to and including 0,050 mm .20
7.1.2 Nominal conductor diameter over 0,050 mm up to and including
2,000 mm .
7.2 Bond strength of a twisted coil.23
7.2.1 Principle .23
7.2.2 Equipment .23

60851-3 © IEC:2009 – 3 –
7.2.3 Specimen .23
7.2.4 Procedure.25
7.2.5 Result.25
Annex A (informative) Bond strength of heat bonding wires .27
Annex B (informative) Friction test methods.33
Bibliography.43

Figure 1 – Test equipment to determine springiness .8
Figure 2 – Construction and details of the mandrel (see Table 1).9
Figure 3 – Test equipment to determine springiness .11
Figure 4 – Test equipment for mandrel winding test .14
Figure 5 – Test equipment for jerk test.15
Figure 6 – Test equipment for peel test.16
Figure 7 – Scraper .17
Figure 8 – Cross-section of the wire after removal of the coating .17
Figure 9 – Test equipment for unidirectional scrape test .19
Figure 10 – Test equipment for bond retention of a helical coil.22
Figure 11 – Coil winder .24
Figure 12 – Oval shape coil .25
Figure 13 – Twisting device with a load applied to the twisted coil specimen .25
Figure 14 – Arrangement of supports .26
Figure A.1 – Example of voltage-time graphs of twisted coil specimens with a nominal
conductor diameter of 0,300 mm with isothermic graphs .29
Figure A.2 – Example of voltage-time graphs of twisted coil specimens with a nominal
conductor diameter of 0,315 mm with isothermic graphs .30
Figure A.3 – Example of voltage-time graphs of twisted coil specimens with a nominal
conductor diameter of 0,355 mm with isothermic graphs .31
Figure A.4 – Example of voltage-time graphs of twisted coil specimens with a nominal
conductor diameter of 0,500 mm with isothermic graphs .32
Figure B.1 – Static coefficient of friction test apparatus.38
Figure B.2 – Dynamic coefficient of friction test apparatus .39
Figure B.3 – Dynamic coefficient of friction test apparatus .40
Figure B.4 – Detail drawing of friction head assembly with mechanical dynamometer .41
Figure B.5 – Load block with sapphires.42
Figure B.6 – Twisted specimen .42

Table 1 – Mandrels for springiness .9
Table 2 – Magnification to detect cracks .12
Table 3 – Load for
...


IEC 60851-3 ®
Edition 3.2 2019-08
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Winding wires – Test methods –
Part 3: Mechanical properties
Fils de bobinage – Méthodes d'essai –
Partie 3: Propriétés mécaniques

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

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IEC 60851-3 ®
Edition 3.2 2019-08
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Winding wires – Test methods –

Part 3: Mechanical properties
Fils de bobinage – Méthodes d'essai –

Partie 3: Propriétés mécaniques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.10 ISBN 978-2-8322-7348-7

IEC 60851-3 ®
Edition 3.2 2019-08
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Winding wires – Test methods –
Part 3: Mechanical properties
Fils de bobinage – Méthodes d'essai –
Partie 3: Propriétés mécaniques

– 2 – IEC 60851-3:2009+AMD1:2013

+AMD2:2019 CSV  IEC 2019
CONTENTS
1 Scope . 8

2 Normative references . 8

3 Test 6: Elongation . 8

3.1 Elongation at fracture . 8

3.2 Tensile strength . 8

4 Test 7: Springiness . 9

4.1 Round wire with a nominal conductor diameter from 0,080 mm up to and
including 1,600 mm . 9

4.1.1 Principle . 9
4.1.2 Equipment . 9
4.1.3 Procedure . 10
4.2 Round wire with a nominal conductor diameter over 1,600 mm and
rectangular wire . 11
4.2.1 Principle . 11
4.2.2 Equipment . 11
4.2.3 Specimen . 12
4.2.4 Procedure . 12
5 Test 8: Flexibility and adherence . 13
5.1 Mandrel winding test . 13
5.1.1 Round wire . 13
5.1.2 Rectangular wire . 14
5.1.3 Covered bunched wire . 15
5.2 Stretching test (applicable to enamelled round wire with a nominal conductor
diameter over 1,600 mm) . 15
5.3 Jerk test (applicable to enamelled round wire with a nominal conductor
diameter up to and including 1,000 mm) . 16
5.4 Peel test (applicable to enamelled round wire with a nominal conductor
diameter over 1,000 mm) . 16
5.5 Adherence test . 18
5.5.1 Enamelled rectangular wire . 18
5.5.2 Impregnated fibre covered round and rectangular wire . 18
5.5.3 Fibre covered enamelled round and rectangular wire . 18
5.5.4 Tape wrapped round and rectangular wire (for adhesive tape only) . 19
6 Test 11: Resistance to abrasion (applicable to enamelled round wire) . 19

6.1 Principle . 19
6.2 Equipment . 19
6.3 Procedure . 20
7 Test 18: Heat bonding (applicable to enamelled round wire with a nominal
conductor diameter over 0,050 mm up to and including 2 000 mm and to
enamelled rectangular wire) . 21
7.1 Vertical bond retention of a helical coil . 21
7.1.1 Nominal conductor diameter up to and including 0,050 mm . 21
7.1.2 Nominal conductor diameter over 0,050 mm up to and including
2,000 mm . 21
7.2 Bond strength of a twisted coil . 24
7.2.1 Principle . 24
7.2.2 Equipment . 24
7.2.3 Specimen . 24

+AMD2:2019 CSV  IEC 2019
7.2.4 Procedure . 26

7.2.5 Result . 26

7.3 Enamelled rectangular wire heat bonding . 27

Annex A (informative) Bond strength of heat bonding wires . 29

Annex B (informative) Friction test methods . 35

Figure 1 – Test equipment to determine springiness . 9

Figure 2 – Construction and details of the mandrel (see Table 1) . 10

Figure 3 – Test equipment to determine springiness . 12

Figure 4 – Test equipment for mandrel winding test . 15
Figure 5 – Test equipment for jerk test . 16
Figure 6 – Test equipment for peel test . 17
Figure 7 – Scraper . 18
Figure 8 – Cross-section of the wire after removal of the coating . 18
Figure 9 – Test equipment for unidirectional scrape test . 20
Figure 10 – Test equipment for bond retention of a helical coil . 23
Figure 11 – Coil winder . 25
Figure 12 – Oval shape coil . 26
Figure 13 – Twisting device with a load applied to the twisted coil specimen . 26
Figure 14 – Arrangement of supports . 27
Figure 15 – Samples for heat bonding. 28
Figure A.1 – Example of voltage-time graphs of twisted coil specimens with a nominal
conductor diameter of 0,300 mm with isothermic graphs . 31
Figure A.2 – Example of voltage-time graphs of twisted coil specimens with a nominal
conductor diameter of 0,315 mm with isothermic graphs . 32
Figure A.3
...


IEC 60851-3 ®
Edition 3.1 2013-07
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Winding wires – Test methods –
Part 3: Mechanical properties
Fils de bobinage – Méthodes d'essai –
Partie 3: Propriétés mécaniques

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,

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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

Useful links:
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It also gives information on projects, replaced and additional languages. Also known as the International
withdrawn publications. Electrotechnical Vocabulary (IEV) on-line.

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IEC 60851-3 ®
Edition 3.1 2013-07
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Winding wires – Test methods –

Part 3: Mechanical properties
Fils de bobinage – Méthodes d'essai –

Partie 3: Propriétés mécaniques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.10 ISBN 978-2-8322-0939-4

IEC 60851-3 ®
Edition 3.1 2013-07
REDLINE VERSION
VERSION REDLINE
colour
inside
Winding wires – Test methods –
Part 3: Mechanical properties
Fils de bobinage – Méthodes d'essai –
Partie 3: Propriétés mécaniques

– 2 – 60851-3  IEC:2009+A1:2013

CONTENTS
FOREWORD . 4

INTRODUCTION . 6

1 Scope . 7

2 Normative references . 7

3 Test 6: Elongation . 7

3.1 Elongation at fracture . 7

3.2 Tensile strength . 7

4 Test 7: Springiness . 8
4.1 Round wire with a nominal conductor diameter from 0,080 mm up to and
including 1,600 mm . 8
4.1.1 Principle . 8
4.1.2 Equipment . 8
4.1.3 Procedure . 9
4.2 Round wire with a nominal conductor diameter over 1,600 mm and
rectangular wire . 10
4.2.1 Principle . 10
4.2.2 Equipment . 10
4.2.3 Specimen . 11
4.2.4 Procedure . 11
5 Test 8: Flexibility and adherence . 12
5.1 Mandrel winding test . 12
5.1.1 Round wire . 12
5.1.2 Rectangular wire . 13
5.1.3 Covered bunched wire . 14
5.2 Stretching test (applicable to enamelled round wire with a nominal conductor
diameter over 1,600 mm) . 14
5.3 Jerk test (applicable to enamelled round wire with a nominal conductor
diameter up to and including 1,000 mm) . 15
5.4 Peel test (applicable to enamelled round wire with a nominal conductor
diameter over 1,000 mm) . 15
5.5 Adherence test . 17
5.5.1 Enamelled rectangular wire . 17
5.5.2 Impregnated fibre covered round and rectangular wire . 17
5.5.3 Fibre covered enamelled round and rectangular wire . 17
5.5.4 Tape wrapped round and rectangular wire (for adhesive tape only) . 18
6 Test 11: Resistance to abrasion (applicable to enamelled round wire) . 18
6.1 Principle . 18
6.2 Equipment . 18
6.3 Procedure . 19
7 Test 18: Heat bonding (applicable to enamelled round wire with a nominal
conductor diameter over 0,050 mm up to and including 2 000 mm) . 20
7.1 Vertical bond retention of a helical coil . 20
7.1.1 Nominal conductor diameter up to and including 0,050 mm . 20
7.1.2 Nominal conductor diameter over 0,050 mm up to and including
2,000 mm . 20
7.2 Bond strength of a twisted coil . 23
7.2.1 Principle . 23
7.2.2 Equipment . 23

60851-3  IEC:2009+A1:2013 – 3 –

7.2.3 Specimen . 23

7.2.4 Procedure . 25

7.2.5 Result . 25

Annex A (informative) Bond strength of heat bonding wires . 27

Annex B (informative) Friction test methods . 33

Bibliography . 48

Figure 1 – Test equipment to determine springiness . 8

Figure 2 – Construction and details of the mandrel (see Table 1) . 9

Figure 3 – Test equipment to determine springiness . 11
Figure 4 – Test equipment for mandrel winding test . 14
Figure 5 – Test equipment for jerk test . 15
Figure 6 – Test equipment for peel test . 16
Figure 7 – Scraper . 17
Figure 8 – Cross-section of the wire after removal of the coating . 17
Figure 9 – Test equipment for unidirectional scrape test . 19
Figure 10 – Test equipment for bond retention of a helical coil . 22
Figure 11 – Coil winder . 24
Figure 12 – Oval shape coil . 25
Figure 13 – Twisting device with a load applied to the twisted coil specimen . 25
Figure 14 – Arrangement of supports . 26
Figure A.1 – Example of voltage-time graphs of twisted coil specimens with a nominal
conductor diameter of 0,300 mm with isothermic graphs . 29
Figure A.2 – Example of voltage-time graphs of twisted coil specimens with a nominal
conductor diameter of 0,315 mm with isothermic graphs . 30
Figure A.3 – Example of voltage-time graphs of twisted coil specimens with a nominal
conductor diameter of 0,355 mm with isothermic graphs . 31
Figure A.4 – Example of voltage-time graphs of twisted coil specimens with a nominal
conductor diameter of 0,500 mm with isothermic graphs . 32
Figure B.1 – Static coefficient of friction test apparatus . 40
Figure B.2 – Dynamic coefficient of friction test apparatus .
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