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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
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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
...