BS EN 60034-18-31:2012
$142.49
Rotating electrical machines – Functional evaluation of insulation systems. Test procedures for form-wound windings. Thermal evaluation and classification of insulation systems used in rotating machines
| Published By | Publication Date | Number of Pages |
| BSI | 2012 | 32 |
IEC 60034-18-31:2012 describes thermal endurance test procedures for classification of insulation systems used in a.c. or d.c. rotating electrical machines with indirect cooling and form-wound windings. These test procedures are intended to compare the thermal endurance performance of the mainwall insulation between conductor(s) and ground and, where required by the design of the coil or bar, the insulation between the turns. The main technical changes with regard to the previous edition include: – Definition of the test method and sub-cycles required to establish a consistent standardized platform for thermal ageing of insulation systems for form-wound windings. – Recommendations for establishing a thermal life curve based on confidence intervals. – Comparison of candidate and reference system performance for specific requirements of thermal class, within feasible limits. Keywords: rotating machinery, insulation systems
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | English CONTENTS |
| 8 | INTRODUCTION |
| 9 | 1 Scope 2 Normative references |
| 10 | 3 General considerations 3.1 Reference insulation system 3.2 Test procedures |
| 11 | 4 Test objects and test specimens 4.1 Construction of test objects 4.2 Verification of effects of minor changes in insulation systems 4.3 Number of test specimens 4.4 Quality control |
| 12 | 4.5 Initial diagnostic tests 5 Test procedures 5.1 Thermal ageing sub-cycle 5.2 Ageing temperatures and sub-cycle lengths Tables Table 1 – Thermal classes |
| 13 | 5.3 Method of heating Table 2 – Recommended temperatures and ageing sub-cycle exposure periods |
| 14 | 5.4 Thermal ageing of test objects 6 Diagnostic sub-cycle 6.1 Conditioning procedure 6.1.1 General 6.1.2 Mechanical conditioning |
| 15 | 6.1.3 Moisture conditioning 6.2 Diagnostic tests 6.2.1 Voltage withstand test |
| 16 | 6.2.2 Method 6.2.3 Mainwall insulation test 6.2.4 Turn insulation test |
| 17 | 6.3 Informative tests 7 Reporting and functional evaluation of data from candidate and reference systems 7.1 General 7.2 Determining qualification 7.2.1 Overview |
| 18 | 7.2.2 Case A: Qualification for the same class temperature and same expected service life Table 3 – Conditions for qualification of candidate system |
| 19 | 7.2.3 Case B: Qualification for the same class temperature and a different expected service life Figures Figure 1 – Candidate system qualified for the same thermal class and the same expected service life |
| 20 | 7.2.4 Case C: Qualification for a different class temperature and same expected service life Figure 2 – Candidate system qualified for the same thermal class and different expected service life |
| 21 | 7.2.5 Case D: Qualification for a different class temperature and different expected service life Figure 3 – Candidate system qualified for a different class temperature and the same expected service life |
| 22 | 7.2.6 Non-linearity of regression lines 7.2.7 Reduced evaluation Figure 4 – Candidate system qualified for a different service life and different thermal class from the reference |
| 24 | Annex A (informative) Example of test object (formette) construction |
| 25 | Figure A.1 – Typical slot assembly |
| 26 | Figure A.2 – Typical slot assembly |
| 27 | Figure A.3 – Formette for testing DC armature coils |
| 28 | Figure A.4 – Test fixture for rotor slot section |
| 29 | Bibliography |
