BS EN 60172:2015 – TC:2020 Edition
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Tracked Changes. Test procedure for the determination of the temperature index of enamelled and tape wrapped winding wires
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 76 |
IEC 60172:2015 specifies, in accordance with the provisions of IEC 60216-1, a method for evaluating the temperature index of enamelled wire, varnished or unvarnished with an impregnating agent, and of tape wrapped round and rectangular wire, in air at atmospheric pressure by periodically monitoring changes in response to AC proof voltage tests. This procedure does not apply to fibre-insulated wire or wire covered with tapes containing inorganic fibres. This fourth edition cancels and replaces the third edition published in 1987, Amendment 1:1997 and Amendment 2:2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: – Revision of Clause 1, Scope, to incorporate appropriate text from former Clause 2, Object; – Deletion of Clause 2, Object, by placement of its text into existing clauses; – New Clause 2, Normative references; – Revision of 5.1.1, 5.3 and 5.4 with corrections to Amendment 2 to the third edition; – Revision of Clause 7 as to clarify which specimens comply with Table 3 and Table 4; – Revision of figures with high-resolution photos and graphs. Keywords: enamelled wire, tape wrapped round and rectangular wire, AC proof voltage tests
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 50 | English CONTENTS |
| 52 | FOREWORD |
| 54 | 1 Scope 2 Normative references 3 Terms and definitions |
| 55 | 4 Summary of procedure 5 Test specimens 5.1 Preparation 5.1.1 Enamelled round wire with a nominal conductor diameter of 0,224 mm up to and including 2,65 mm |
| 56 | Figures Figure 1 – Device used to form enamelled round wire test specimen Figure 2 – Spacer Tables Table 1 – Force and number of twists for specimens |
| 57 | Figure 3 – Twist forming jig Figure 4 – Test specimen set up in forming jig |
| 58 | 5.1.2 Tape wrapped round wire and enamelled or tape wrapped rectangular wire Figure 5 – Test specimen formed with loop cut Table 2 – Proof voltage for round enamelled wire |
| 59 | Figure 6 – Jig for bending large magnet wire, dielectric test specimen |
| 60 | 5.2 Varnish impregnation Figure 7 – Forming jig and test specimen |
| 61 | 5.3 Notes on number of test specimens 5.4 Specimen holder 5.4.1 For specimens according to 5.1.1 Figure 8 – Specimen holder |
| 62 | 5.4.2 For specimens according to 5.1.2 6 Temperature exposure Figure 9 – Specimen holder and electrical connection fixture |
| 63 | Table 3 – Recommended exposure times in days per cycle |
| 64 | 7 Test voltage and its application 8 Calculations 8.1 Specimen failure time Table 4 – Proof voltage for tape-wrapped round and for enamelled or tape-wrapped rectangular wire |
| 65 | 8.2 Time to failure 8.3 Linearity of data 8.4 Calculating and plotting thermal endurance and temperature index |
| 66 | 9 Report Figure 10 – Thermal endurance graph – Temperature index |
| 67 | Annex A (normative) Method for calculation of the regression line |
| 69 | Table A.1 – Commonly used test temperatures in degrees Celsius and the corresponding kelvins with its reciprocal and reciprocal squared values |
| 70 | Table A.2 – Sample calculation |
| 71 | Figure A.1 – Plot of regression line based on sample calculation (Table A.2) |
| 72 | Annex B (normative) Correlation coefficient |
| 74 | Bibliography |
