IEC 60034-14:2018 is now available as \/2 which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 60034-14:2018 specifies the factory acceptance vibration test procedures and vibration limits for certain electrical machines under specified conditions, when uncoupled from any load or prime mover. It is applicable to DC and three-phase AC machines, with shaft heights 56 mm and higher and a rated output up to 50 MW, at operational speeds from 120 min\u20131 up to and including 15 000 min\u20131. This new edition includes the following significant technical changes with respect to the previous edition: – Improved explanation of the definition \u201cfree suspension\u201d. – Addition of an alternative method of rigid mount – Definition of an improved option for shaft key.<\/p>\n
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| 26<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 4 Measurement quantities 4.1 General 4.2 Vibration magnitude 4.3 Relative shaft vibration 5 Measurement equipment <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | 6 Machine mounting 6.1 General 6.2 Free suspension 6.3 Rigid mounting 6.3.1 Foundation <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 6.3.2 Horizontal machines 6.3.3 Vertical machines 6.4 Active environment determination <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 7 Conditions of measurement 7.1 Key 7.2 Measurement positions and directions 7.2.1 Measurement positions for vibration 7.2.2 Measurement positions for relative shaft displacement 7.3 Test conditions 7.4 Vibration transducer <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 8 Limits of bearing housing vibration 8.1 Limits of vibration magnitude Tables Table 1 \u2013 Limits of maximum vibration magnitude in displacement (r.m.s.) and velocity (r.m.s.) for shaft height H <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | 8.2 Limits of vibration velocity with twice-line frequency for a.c. machines 8.3 Axial vibration 9 Limits of relative shaft vibration <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | Figures Figure 1 \u2013 Minimum elastic displacement as a function of rated speed Table 2 \u2013 Limits for the maximum shaft vibration (Sp-p) andthe maximum run-out <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | Figure 2 \u2013 Preferred positions of measurement applicable to one or both ends of the machine Figure 3 \u2013 Measurement positions for those ends of machines where measurements according to Figure 2 are not possible without disassembly of parts <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | Figure 4 \u2013 Measurement positions for pedestal bearing Figure 5 \u2013 Preferred circumferential position of transducers for the measurement of relative shaft displacement <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Figure 6 \u2013 Measurement positions for vertical machines (measurements to be madeat the bearing housing; when not accessible, then as close as possible) <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | Figure 7 \u2013 Vibration limit diagram for shaft heights H > 132 mm <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Tracked Changes. Rotating electrical machines – Mechanical vibration of certain machines with shaft heights 56 mm and higher. Measurement, evaluation and limits of vibration severity<\/b><\/p>\n |