This part of IEC 60034 is applicable to the on-line detection and diagnosis of failures at the active parts of multi-phase rotating electrical machines (induction and synchronous machines) and of bearing currents. The failure analysis includes:<\/p>\n
interturn faults;<\/p>\n<\/li>\n
phase-to-phase short-circuits;<\/p>\n<\/li>\n
double earth faults and single earth faults of motors with earth connection of the star-point;<\/p>\n<\/li>\n
static and dynamic eccentricities;<\/p>\n<\/li>\n
cage imperfection or defects (e.g. broken bars or end-rings);<\/p>\n<\/li>\n
bearing currents.<\/p>\n<\/li>\n<\/ul>\n
This can be achieved by tools like search coils or other magnetic sensors or partly by the analysis of the terminal voltages and currents.<\/p>\n
The detection of the following effects is excluded from the scope:<\/p>\n
vibration (covered by ISO standards, e.g. ISO 10816 and ISO 7919);<\/p>\n<\/li>\n
partial discharge (covered by IEC 60034-27);<\/p>\n<\/li>\n
single earth-faults of motors without earth connection of the star-point;<\/p>\n<\/li>\n
core imperfection.<\/p>\n<\/li>\n<\/ul>\n
Also excluded are special methods applicable for specific applications only (e.g. turbo generators).<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 5<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 4 Basis of the diagnosis <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | Table 1 \u2013 Most important magnetic fields in the air-gap of a three-phase cage induction motor with an integral slot stator winding under normal operating and fault conditions <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 5 Kinds of electrical signal analysis 5.1 General 5.2 Stator current\/voltage analysis <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 5.3 Induced voltages of auxiliary turns embedded into the stator slots or other magnetic sensors sensing the air-gap flux <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | Table 2 \u2013 Diagnosis of failures at a cage induction motor, equipped with two identical auxiliary coil systems <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 5.4 Induced voltages of search coils collecting axial fluxes 5.5 Shaft voltage analysis 6 Bearing currents <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Bibliography <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 5 Types d’analyses de signaux \u00e9lectriques 5.1 G\u00e9n\u00e9ralit\u00e9s 5.2 Analyse des courants\/tensions d’un stator <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Rotating electrical machines – Online detection and diagnosis of potential failures at the active parts of rotating electrical machines and of bearing currents. Application guide<\/b><\/p>\n |