Manual for Induction Motors and Generators
4 -
3BFP 000 050 R0101 REV E
Chapter 6 - Operation
6.1
General ..................................................................................................................... 53
6.2
Normal operating conditions.................................................................................... 53
6.3
Number of starts ....................................................................................................... 53
6.4
Supervision............................................................................................................... 54
6.4.1
Bearings................................................................................................... 54
6.4.2
Vibrations................................................................................................ 54
6.4.3
Temperatures........................................................................................... 54
6.4.4
Heat exchanger........................................................................................ 55
6.4.5
Slip ring unit............................................................................................ 55
6.5
Follow-up ................................................................................................................. 55
6.6
Shut down................................................................................................................. 55
Chapter 7 - Maintenance
7.1
Preventive maintenance ........................................................................................... 56
7.2
Safety precautions .................................................................................................... 56
7.3
Maintenance program............................................................................................... 57
7.3.1
Recommended maintenance program ..................................................... 59
7.3.1.1
General construction......................................................... 60
7.3.1.2
Main supply connection ................................................... 60
7.3.1.3
Stator and rotor ................................................................. 61
7.3.1.4
Auxiliaries ........................................................................ 61
7.3.1.5
Slip ring unit ..................................................................... 62
7.3.1.6
Lubrication system and bearings ...................................... 62
7.3.1.7
Cooling system ................................................................. 63
7.4
Maintenance of general constructions...................................................................... 64
7.4.1
The tightness of fastenings...................................................................... 64
7.4.2
Vibration and noise ................................................................................. 65
7.4.3
Vibrations................................................................................................ 66
7.4.3.1
Measurement procedures and operational conditions ...... 66
7.4.3.2
Classification according to support flexibility ................. 67
7.4.3.3
Evaluation......................................................................... 67
7.5
Maintenance of bearings and lubrication system ..................................................... 68
7.5.1
Sleeve bearings........................................................................................ 69
7.5.1.1
Oil level ............................................................................ 69
7.5.1.2
Bearing temperature ......................................................... 69
7.5.2
Lubrication of sleeve bearings ................................................................ 69
7.5.2.1
Lubrication oil temperature .............................................. 69
7.5.2.2
Control of the lubricant .................................................... 70
7.5.2.3
Recommended control values for the lubricating oil ....... 70
7.5.2.4
Oil qualities ...................................................................... 70
7.5.2.5
Oil change schedule for mineral oils ................................ 71
7.5.3
Rolling bearings ...................................................................................... 72
7.5.3.1
Bearing construction......................................................... 72
7.5.3.2
Bearing plate..................................................................... 72
7.5.3.3
Re-greasing intervals ........................................................ 72
7.5.3.4
Re-greasing....................................................................... 73
7.5.3.5
Bearing grease .................................................................. 74
7.5.3.6
Bearing maintenance ........................................................ 75
