ABB MT Série Manuel D'installation, D'exploitation Et De Maintenance page 4

6. Low voltage motors in variable speed operation .................................................................11
6.1 Introduction .......................................................................................................................11
6.2 Winding insulation ..............................................................................................................11
6.2.1
6.2.2
6.3 Thermal protection ............................................................................................................11
6.4 Bearing currents ................................................................................................................11
6.4.1
6.4.2
6.5 Cabling, grounding and EMC .............................................................................................12
6.6 Operating speed ................................................................................................................12
6.7 Motors in variable speed applications ................................................................................12
6.7.1
6.7.2
6.7.3
6.7.4
6.7.5
6.8 Rating plates .....................................................................................................................13
6.9 Commissioning the variable speed application ...................................................................13
7. Maintenance ..............................................................................................................................14
7.1 General inspection .............................................................................................................14
7.1.1 Standby motors .......................................................................................................14
7.2 Lubrication ........................................................................................................................14
7.2.1
7.2.2
7.2.3
7.2.4
8. After Sales Support ...................................................................................................................18
8.1 Spare parts ........................................................................................................................18
8.2 Dismantling, re-assembly and rewinding ............................................................................18
8.3 Bearings ............................................................................................................................18
9. Environmental requirements ....................................................................................................18
10. Troubleshooting ........................................................................................................................19
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ABB Motors and Generators | Low voltage motors manual, 3GZF500730-85 Rev F 02-2015
Standard_Manual_LV_Motors_ML_revF_Book.indb 4
Selection of winding insulation for ABB converters ..............................................11
Selection of winding insulation with all other converters .....................................11
Elimination of bearing currents with ABB converters ...........................................11
Elimination of bearing currents with all other converters ......................................12
General ..............................................................................................................12
Motor loadability with AC_8_ _ - series of converters with DTC control ...............12
Motor loadability with AC_5_ _ - series of converter ...........................................12
Motor loadability with other voltage source PWM-type converters ......................12
Short time overloads...........................................................................................13
Motors with permanently greased bearings ........................................................14
Motors with regreasable bearings .......................................................................15
Lubrication intervals and amounts ......................................................................15
Lubricants ..........................................................................................................17
6/2/2015 6:44:24 PM