ABB MT series Installation, Operation & Maintenance Manual

Also see for M2A series: Installation and maintenance instruction Instructions Installation, operation & maintenance instructions Machine Instructions Manual

ABB MT series Installation, Operation & Maintenance Manual Manual pdf 4 page image

5. Low voltage motors in variable speed operation .............................................................................. 115.1 Introduction ..................................................................................................................................... 115.2 Winding insulation ........................................................................................................................... 115.2.1 Phase to phase voltages ...................................................................................................... 115.2.1 Phase to ground voltages .................................................................................................... 115.2.3 Selection of winding insulation for ACS550- and ACS800-converters ................................... 115.2.4 Selection of winding insulation with all other converters ........................................................ 115.3 Thermal protection of windings ....................................................................................................... 115.4 Bearing currents .............................................................................................................................. 125.4.1 Elimination of bearing currents with ABB ACS550 and ACS800 converters .......................... 125.4.2 Elimination of bearing currents with all other converters ........................................................ 125.5 Cabling, grounding and EMC .......................................................................................................... 125.6 Operating speed ............................................................................................................................. 125.7 Dimensioning the motor for variable speed application .................................................................... 125.7.1 General ................................................................................................................................ 125.7.2 Dimensioning with ABB ACS800 converters with DTC control .............................................. 125.7.3 Dimensioning with ABB ACS550 converters ......................................................................... 135.7.4 Dimensioning with other voltage source PWM-type converters ............................................. 135.7.5 Short time overloads ............................................................................................................ 135.8 Rating plates ................................................................................................................................... 135.9 Commissioning the variable speed application ................................................................................ 136. Maintenance .......................................................................................................................................... 146.1 General inspection .......................................................................................................................... 146.1.1 Standby motors ......................................................................................................................146.2 Lubrication ............................................................................................................................................... 146.2.1 Machines with permanently greased bearings ...................................................................... 146.2.2 Motors with regreasable bearings ......................................................................................... 156.2.3 Lubrication intervals and amounts ........................................................................................ 156.2.4 Lubricants ............................................................................................................................ 177. After Sales Support ............................................................................................................................... 187.1 Spare parts ..................................................................................................................................... 187.2 Rewinding ....................................................................................................................................... 187.3 Bearings ......................................................................................................................................... 188. Environmental requirements ................................................................................................................ 188.1 Noise levels ..................................................................................................................................... 189. Troubleshooting .................................................................................................................................... 19EN-4 ABB Motors and Generators | Low voltage motor manual 01-2009