TABLE OF CONTENTS Based on the machine structure shown in Figures 2.10 and 3.7.
| Subassembly | Component | Failure mode | Root cause | Early indicators of the fault |
|---|---|---|---|---|
| Enclosure | Heat exchanger | Failure of heat exchanger pipework | Defective material Defective installation Corrosion Vibration Shock | Higher winding temperature Higher coolant temperature Moisture and lowered insulation resistance |
| Failure of heat exchanger tubes | Defective material Defective installation Corrosion Vibration Shock | Increased winding discharge activity Vibration | ||
| Electrical connections | Insulation failure of connector | Defective material Defective installation Excessive dielectric stress Excessive temperature | Increased connector discharge activity | |
| Mechanical failure of connector | Defective material Defective installation Vibration Shock | Higher winding temperature Vibration Altered machine performance | ||
| Bushings | Insulation failure of bushing | Defective material Defective installation Excessive dielectric stress Excessive temperature Vibration Shock | Increased bushing discharge activity | |
| Mechanical failure of bushing | Defective material Defective installation Vibration Shock | |||
| Bearings and seals | Loss of lubrication, grease or oil | Lubrication system failure Lack of maintenance Failure of seals | Higher bearing temperature Bearing vibration Bearing noise | |
| Mechanical failure of bearing element Excessive wear | Loss of lubrication Vibration Shock Overload Loss of lubrication Vibration Shock Overload | |||
| Electrically provoked failure of bearing element | Shaft voltage Vibration Shock Electrical fault | Higher bearing temperature Bearing vibration Bearing noise Shaft current |
| Subassembly | Component | Failure mode | Root cause | Early indicators of the fault |
|---|---|---|---|---|
| Stator winding | Conductors | Failure of conductor cooling hoses | Defective design Defective manufacture Excessive vibration Excessive temperature | Vibration |
| Failure of subconductors | Excessive vibration |
