ABB M2M series - Page 25

5. Low voltage motors in variable speed operation .............................................................................. 32
5.1 Introduction ..................................................................................................................................... 32
5.2 Winding insulation ........................................................................................................................... 32
5.2.1 Phase to phase voltages ...................................................................................................... 32
5.2.1 Phase to ground voltages .................................................................................................... 32
5.2.3 Selection of winding insulation for ACS550- and ACS800-converters ................................... 32
5.2.4 Selection of winding insulation with all other converters ........................................................ 32
5.3 Thermal protection of windings ....................................................................................................... 32
5.4 Bearing currents .............................................................................................................................. 32
5.4.1 Elimination of bearing currents with ABB ACS550 and ACS800 converters .......................... 33
5.4.2 Elimination of bearing currents with all other converters ........................................................ 33
5.5 Cabling, grounding and EMC .......................................................................................................... 33
5.6 Operating speed ............................................................................................................................. 33
5.7 Dimensioning the motor for variable speed application .................................................................... 33
5.7.1 General ................................................................................................................................ 33
5.7.2 Dimensioning with ABB ACS800 converters with DTC control .............................................. 33
5.7.3 Dimensioning with ABB ACS550 converters ......................................................................... 34
5.7.4 Dimensioning with other voltage source PWM-type converters ............................................. 34
5.7.5 Short time overloads ............................................................................................................ 34
5.8 Rating plates ................................................................................................................................... 34
5.9 Commissioning the variable speed application ................................................................................ 34
6. Maintenance .......................................................................................................................................... 35
6.1 General inspection .......................................................................................................................... 35
6.1.1 Standby motors ......................................................................................................................35
6.2 Lubrication ............................................................................................................................................... 35
6.2.1 Machines with permanently greased bearings ...................................................................... 35
6.2.2 Motors with regreasable bearings ......................................................................................... 36
6.2.3 Lubrication intervals and amounts ........................................................................................ 36
6.2.4 Lubricants ............................................................................................................................ 38
7. After Sales Support ............................................................................................................................... 39
7.1 Spare parts ..................................................................................................................................... 39
7.2 Rewinding ....................................................................................................................................... 39
7.3 Bearings ......................................................................................................................................... 39
8. Environmental requirements ................................................................................................................ 39
8.1 Noise levels ..................................................................................................................................... 39
9. Troubleshooting .................................................................................................................................... 40
Low voltage motor manual 01-2009 | ABB Motors and Generators EN – 25