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BS EN IEC 60851-3:2023

BS EN IEC 60851-3:2023

$198.66

Winding wires. Test methods – Mechanical properties

Published By Publication Date Number of Pages
BSI 2023 52
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PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
10 FOREWORD
12 INTRODUCTION
13 1 Scope
2 Normative references
3 Terms and definitions
4 Test 6: Elongation
4.1 Elongation at fracture
14 4.2 Tensile strength
5 Test 7: Springiness
5.1 General
5.2 Round wire with a nominal conductor diameter from 0,080 mm up to and including 1,600 mm
5.2.1 Principle
5.2.2 Equipment
15 Figures
Figure 1 ā€“ Test equipment to determine springiness
Figure 2 ā€“ Construction and details of the mandrel (see Table 1)
16 5.2.3 Procedure
Tables
Table 1 ā€“ Mandrels for springiness
17 5.3 Round wire with a nominal conductor diameter over 1,600 mm and rectangular wire
5.3.1 Principle
5.3.2 Equipment
18 5.3.3 Specimen
5.3.4 Procedure
Figure 3 ā€“ Test equipment to determine springiness
19 6 Test 8: Flexibility and adherence
6.1 General
6.2 Mandrel winding test
6.2.1 Round wire
Table 2 ā€“ Magnification to detect cracks
20 6.2.2 Rectangular wire
21 6.2.3 Covered bunched wire
6.3 Stretching test (applicable to enamelled round wire with a nominal conductor diameter over 1,600 mm)
Figure 4 ā€“ Test equipment for mandrel winding test
22 6.4 Jerk test (applicable to enamelled round wire with a nominal conductor diameter up to and including 1,000 mm)
6.5 Peel test (applicable to enamelled round wire with a nominal conductor diameter over 1,000 mm)
Figure 5 ā€“ Test equipment for jerk test
23 Figure 6 ā€“ Test equipment for peel test
Table 3 ā€“ Load for peel test
24 6.6 Adherence test
6.6.1 General
6.6.2 Enamelled rectangular wire
6.6.3 Impregnated fibre covered round and rectangular wire
6.6.4 Fibre covered enamelled round and rectangular wire
Figure 7 ā€“ Scraper
Figure 8 ā€“ Cross-section of the wire after removal of the coating
25 6.6.5 Tape-wrapped round and rectangular wire (for adhesive tape only)
7 Test 11: Resistance to abrasion (applicable to enamelled round wire)
7.1 General
7.2 Principle
7.3 Equipment
26 7.4 Procedure
Figure 9 ā€“ Test equipment for unidirectional scrape test
27 8 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)
8.1 General
8.2 Vertical bond retention of a helical coil
8.2.1 General
8.2.2 Nominal conductor diameter up to and including 0,050 mm
8.2.3 Nominal conductor diameter over 0,050 mm up to and including 2,000 mm
28 Table 4 ā€“ Preparation of helical coils
29 Figure 10 ā€“ Test equipment for bond retention of a helical coil
Table 5 ā€“ Bond retention at elevated temperature
30 8.3 Bond strength of a twisted coil
8.3.1 General
8.3.2 Principle
8.3.3 Equipment
8.3.4 Specimen
31 Figure 11 ā€“ Coil winder
32 8.3.5 Procedure
8.3.6 Result
Figure 12 ā€“ Oval shape coil
Figure 13 ā€“ Twisting device with a load applied to the twisted coil specimen
33 8.4 Enamelled rectangular wire heat bonding
Figure 14 ā€“ Arrangement of supports
34 Figure 15 ā€“ Samples for heat bonding
35 Annex A (informative) Bond strength of heat bonding wires
A.1 Calculation of the temperature of the twisted coil specimen
A.1.1 Method
A.1.2 Temperature coefficient
A.1.3 Calculation
36 A.2 Determination of the heating period
A.2.1 Voltage-time graphs
A.2.2 Voltage at maximum temperature
37 Figure A.1 ā€“ Example of voltage-time graphs of twisted coil specimens with a nominal conductor diameter of 0,300 mm with isothermic graphs
38 Figure A.2 ā€“ Example of voltage-time graphs of twisted coil specimens with a nominal conductor diameter of 0,315 mm with isothermic graphs
39 Figure A.3 ā€“ Example of voltage-time graphs of twisted coil specimens with a nominal conductor diameter of 0,355 mm with isothermic graphs
40 Figure A.4 ā€“ Example of voltage-time graphs of twisted coil specimens with a nominal conductor diameter of 0,500 mm with isothermic graphs
41 Annex B (informative) Friction test methods
B.1 General
B.2 Test A: Static coefficient of friction test method
B.2.1 Test method (applicable to enamelled round wires with a nominal conductor diameter from 0,050 mm up to and including 1,600 mm)
B.2.2 Test apparatus
42 B.3 Test B: First dynamic coefficient of friction test method
B.3.1 Principle
B.3.2 Method of test
B.4 Test C: Second dynamic coefficient of friction test method (applicable to enamelled round wires with a nominal conductor diameter from 0,050 mm up to and including 1,600 mm)
B.4.1 Test equipment
43 B.4.2 Test specimen
B.4.3 Specimen preparation
44 B.4.4 Procedure
Table B.1 ā€“ Load block weights for dynamic coefficient of friction testing
45 B.5 Test D: Force of friction by the twisted pair method
B.5.1 Enamelled round wires with a nominal conductor diameter from 0,1 mm up to and including 1,500 mm
B.5.2 Test method
Table B.2 ā€“ Twisted pair method
46 Figure B.1 ā€“ Static coefficient of friction test apparatus
47 Figure B.2 ā€“ Dynamic coefficient of friction test apparatus
48 Figure B.3 ā€“ Diagram of a typical dynamic coefficient of friction tester
49 Figure B.4 ā€“ Material ā€“ sapphire (synthetic)
Figure B.5 ā€“ Synthetic sapphires mounted on load block
50 Figure B.6 ā€“ Load applied perpendicular to wire path
Figure B.7 ā€“ Twisted specimen
51 Bibliography

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BS EN IEC 60851-3:2023
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