WEG MGW User Manual

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8 l Installation, operation and maintenance manual – Squirrel cage motor – M line – Vertical 11371757
4.5.1.2 Alarm and trip temperatures ............................................................................................... 24
4.5.1.3 Temperature and ohmic resistance of the PT100 thermoresistance .................................... 25
4.5.1.4 Space heater ...................................................................................................................... 25
4.5.2 Water leak sensor ...............................................................................................................................25
4.6 COOLING ....................................................................................................................................... 25
4.6.1 Air-water heat exchange cooling .........................................................................................................25
4.6.1.1 Radiators for application with seawater ............................................................................... 25
4.6.2 Independent ventilation cooling ...........................................................................................................26
4.7 ELECTRICAL ASPECTS ................................................................................................................. 26
4.7.1 Electrical connections .........................................................................................................................26
4.7.1.1 Main electrical connections ................................................................................................. 26
4.7.1.2 Grounding .......................................................................................................................... 26
4.7.2 Connection diagrams ..........................................................................................................................27
4.7.2.1 Connection diagrams according to IEC60034-8 ................................................................. 27
4.7.2.1.1 Stator connection diagrams ............................................................................27
4.7.2.2 Connection diagrams according to NEMA MG1 .................................................................. 28
4.7.2.2.1 Stator connection diagrams ............................................................................28
4.7.2.3 Rotation direction ............................................................................................................... 28
4.7.2.4 Accessory connection diagrams ......................................................................................... 28
4.8 MECHANICAL ASPECTS ............................................................................................................... 29
4.8.1 Base ...................................................................................................................................................29
4.8.2 Base loads ..........................................................................................................................................29
4.8.3 Motor mounting ..................................................................................................................................29
4.8.3.1 Motor with solid shaft and flange ........................................................................................ 29
4.8.3.2 Motor with hollow shaft and flange ...................................................................................... 29
4.8.4 Anchor plate set ..................................................................................................................................29
4.8.5 Natural frequency of the base ..............................................................................................................30
4.8.6 Leveling ..............................................................................................................................................30
4.8.7 Alignment ............................................................................................................................................30
4.8.8 Hollow shaft motor alignment ..............................................................................................................31
4.8.9 Doweling .............................................................................................................................................31
4.8.10 Couplings ...........................................................................................................................................31
4.8.10.1 Direct coupling ................................................................................................................... 32
4.8.10.2 Gear coupling ..................................................................................................................... 32
4.8.10.3 Belt drive ............................................................................................................................ 32
4.8.10.4 Coupling for hollow shaft motors ........................................................................................ 32
4.9 HYDRAULIC UNIT .......................................................................................................................... 32
5 STARTING ........................................................................................................ 33
5.1 DIRECT ON-LINE STARTING ......................................................................................................... 33
5.2 DIRECT ONLINE STARTING FREQUENCY ..................................................................................... 33
5.3 LOCKED ROTOR CURRENT .......................................................................................................... 33
5.4 STARTING WITH REDUCED CURRENT ......................................................................................... 33
6 COMMISSIONING ............................................................................................. 34
6.1 PRELIMINARY INSPECTION .......................................................................................................... 34
6.2 FIRST STARTING ........................................................................................................................... 34
6.2.1 Starting procedure ..............................................................................................................................34
6.3 OPERATION ................................................................................................................................... 35
6.3.1 General ...............................................................................................................................................35
6.3.2 Temperatures......................................................................................................................................35
6.3.3 Bearings .............................................................................................................................................35
6.3.3.1 High-pressure oil injection system ....................................................................................... 35
6.3.4 Radiators ............................................................................................................................................35
6.3.5 Vibration .............................................................................................................................................36
6.3.6 Shaft vibration limits ............................................................................................................................36
6.3.7 Shutdown ...........................................................................................................................................36
7 MAINTENANCE ................................................................................................. 37
7.1 GENERAL ....................................................................................................................................... 37
7.2 GENERAL CLEANING .................................................................................................................... 37
7.3 WINDING MAINTENANCE .............................................................................................................. 37
7.3.1 Winding inspection ..............................................................................................................................37
7.3.2 Winding cleaning .................................................................................................................................37
7.3.3 Inspections .........................................................................................................................................37

WEG MGW Specifications

General

Brand	WEG
Model	MGW
Category	Engine
Language	English