ABB AMA Series Manual page 14

3BFP 000 050 R0101 REV E
7.5.4 Bearing insulation and bearing insulation resistance check .................... 75
7.5.4.1
7.5.4.2
7.6 Maintenance of stator and rotor windings ................................................................ 78
7.6.1 Particular safety instructions for winding maintenance........................... 78
7.6.2 The timing of the maintenance ................................................................ 79
7.6.3 The correct operating temperature........................................................... 79
7.6.4 Insulation resistance test .......................................................................... 79
7.6.4.1
7.6.4.2
7.6.4.3
7.6.4.4
7.6.4.5
7.6.5 Insulation resistance measurement for auxiliaries ................................... 84
7.6.6 The polarization index ............................................................................. 84
7.6.7 Other maintenance operations ................................................................. 85
7.7 Maintenance of slip rings and brush gear ................................................................. 85
7.7.1 Care of slip rings...................................................................................... 85
7.7.1.1
7.7.1.2
7.7.2 Care of brush gear.................................................................................... 85
7.7.2.1
7.8 Maintenance of cooling units.................................................................................... 86
7.8.1 Maintenance instructions for machines with open air cooling ................ 86
7.8.1.1
7.8.2 Maintenance instructions for air-to-water heat exchangers..................... 87
7.8.3 Maintenance instructions for air-to-air heat exchangers.......................... 87
7.8.3.1
7.8.3.2
7.8.4 Maintenance of external blower motors .................................................. 88
7.9 Repairs, disassembly and assembly .......................................................................... 89
Chapter 8 - Trouble Shooting
8.1 Trouble shooting ....................................................................................................... 90
8.1.1 Mechanical performance.......................................................................... 91
8.1.2 Lubrication system and bearings ............................................................. 92
8.1.2.1
8.1.2.2
8.1.3 Thermal performance............................................................................... 95
8.1.3.1
8.1.3.2
8.1.3.3
8.1.3.4
8.2 Oil leakage of sleeve bearings .................................................................................. 99
8.2.1 Oil ............................................................................................................ 99
8.2.2 Sleeve bearings ...................................................................................... 100
8.2.3 Bearing verification ............................................................................... 100
8.2.4 Oil container and piping ........................................................................ 101
8.2.5 Oil container and piping verification ..................................................... 101
8.2.6 Use ......................................................................................................... 102
Manual for Induction Motors and Generators
Procedure .......................................................................... 75
Cleanliness of bearing insulation ...................................... 77
Conversion of measured insulation resistance values....... 80
General considerations ...................................................... 81
Minimum values for insulation resistance ........................ 81
Stator winding insulation resistance measurement ........... 82
Rotor winding insulation resistance measurement............ 83
Standstill period ................................................................ 85
Wear .................................................................................. 85
Brush pressure................................................................... 86
Cleaning of filters.............................................................. 87
Air circulation ................................................................... 87
Cleaning ............................................................................ 88
Lubrication system and rolling bearings ........................... 92
Lubrication system and sleeve bearings............................ 93
Thermal performance, open air cooling system................ 95
Thermal performance, air-to-air cooling system............... 96
Thermal performance, air-to-water cooling system .......... 97
Thermal performance, rib cooled...................................... 98
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