ABB Low Voltage Motors Manuel D'installation, D'exploitation Et De Maintenance page 4

5.3 Thermal protection of windings ...................................................................................................... 11
5.4 Bearing currents ............................................................................................................................. 11
5.4.1 Elimination of bearing currents with ABB ACS550 and ACS800 converters ...................... 12
5.4.2 Elimination of bearing currents with all other converters .................................................... 12
5.5 Cabling, grounding and EMC ......................................................................................................... 12
5.6 Operating speed ............................................................................................................................. 12
5.7 Dimensioning the motor for variable speed application .................................................................. 12
5.7.1 General ............................................................................................................................... 12
5.7.2 Dimensioning with ABB ACS800 converters with DTC control ........................................... 12
5.7.3 Dimensioning with ABB ACS550 converters ....................................................................... 13
5.7.4 Dimensioning with other voltage source PWM-type converters .......................................... 13
5.7.5 Short time overloads ........................................................................................................... 13
5.8 Rating plates .................................................................................................................................. 13
5.9 Commissioning the variable speed application .............................................................................. 13
6. Maintenance .......................................................................................................................................... 14
6.1. General inspection ......................................................................................................................... 14
6.2 Lubrication ..................................................................................................................................... 14
6.2.1 Machines with permanently greased bearings .................................................................... 14
6.2.2 Motors with regreasable bearings ....................................................................................... 15
6.2.3 Lubrication intervals and amounts ...................................................................................... 15
6.2.4 Lubricants ........................................................................................................................... 17
7. After Sales Support .............................................................................................................................. 18
7.1. Spare parts .................................................................................................................................... 18
7.2 Rewinding ...................................................................................................................................... 18
7.3 Bearings ......................................................................................................................................... 18
8. Environmental requirements ................................................................................................................ 18
8.1 Noise levels .................................................................................................................................... 18
9. Troubleshooting .................................................................................................................................... 19
EN-4
ABB/Manual for Low Voltage Motors 01-2009