ABB M2A Series - Page 28

28 – EN ABB Motors and Generators | 3GZF500730-70 rev. C RU-EN 01-2016
6. Motors for explosive atmospheres and variable speed operation .........................................................37
6.1 Introduction ........................................................................................................................................37
6.2 Main requirements according to GOST and IEC standards .................................................................37
6.3 Winding insulation ..............................................................................................................................37
6.3.1 Phase to phase voltages .....................................................................................................37
6.3.2 Phase to ground voltages ....................................................................................................37
6.3.3 Selection of winding insulation with frequency converters ...................................................38
6.4 Thermal protection of windings ...........................................................................................................38
6.5 Bearing currents .................................................................................................................................38
6.5.1 Elimination of bearing currents .............................................................................................38
6.6 Cabling, grounding and EMC .............................................................................................................38
6.7 Load and speed limitations .................................................................................................................39
6.7.1 General ...............................................................................................................................39
6.7.2 Motor loadability with ACS800/880-series of converters with DTC-control ...........................39
6.7.3 Motor loadability with ACS500 –series and other voltage source converters ........................39
6.7.4 Short time overloads ...........................................................................................................39
6.8 Rating plates ......................................................................................................................................39
6.8.1 Content of standard VSD plate ............................................................................................39
6.8.2 Content of customer specific VSD plate ..............................................................................39
6.9 Commissioning the variable speed application ...................................................................................40
6.9.1 Setting parameters based on the VSD plate ........................................................................40
7. Maintenance .................................................................................................................................................41
7.1 General inspection .............................................................................................................................41
7.1.1 Standby motors ...................................................................................................................41
7.2 Lubrication .........................................................................................................................................41
7.2.1 Motors with permanently greased bearings .........................................................................41
7.2.2 Motors with re-greasable bearings .......................................................................................42
7.2.3 Lubrication intervals and amounts .......................................................................................42
7.2.4 Lubricants ...........................................................................................................................44
8. After Sales support ......................................................................................................................................45
8.1 Spare parts ........................................................................................................................................45
8.2 Dismantling, re-assembly and rewinding .............................................................................................45
8.3 Bearings .............................................................................................................................................45
8.4 Gaskets and sealing ...........................................................................................................................45
9. Environmental requirements .......................................................................................................................45
10. Troubleshooting ............................................................................................................................................46
11. Figures ..........................................................................................................................................................49