WEG M line Series User manual
Motors I Automation I Energy I Transmission & Distribution I Coatings
Low and high voltage three phase
induction motors
M line - Squirrel cage rotor - Vertical
Installation, Operation and Maintenance Manual
Installation, Operation and Maintenance Manual
Document Number: 11371757
Models: MGA, MG , MGD, MGT, MGV, MGF, MGR, MGI, MGW and MGL
Language: English
Revision: 7
May 2018
Dear Customer,
Thank you for purchasing a WEG motor. Our products are developed with the highest standards of
quality and efficiency which ensures outstanding performance.
Since electric motors play a major role in the comfort and well-being of mankind, it must be identified
and treated as a driving machine with characteristics that involve specific care, such as proper
storage, installation and maintenance
All efforts have been made to ensure that the information contained in this manual is faithful to the
configurations and applications of the motor.
Therefore, we recommend that you read this manual carefully before proceeding with the installation,
operation or maintenance of the motor in order to ensure safe and reliable operation of your
equipment and facility. If you need any further information, please contact WEG.
Always keep this manual close to the motor, so that it can be consulted whenever necessary.
ATTENTION
1. It is imperative to follow the procedures contained in this manual for the warranty to be valid;
2. The motor installation, operation and maintenance procedures must be performed only by qualified
personnel.
NOTES
1. The total or partial reproduction of information supplied in this manual is authorized, provided that
reference is made to its source. If this manual is lost, an electronic DF file is available at www.weg.net
or another printed copy may be requested.
WEG EQUIPAME TOS ELÉTRICOS S.A.
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11371757 Installation, operation an maintenance manual – Squirrel cage motor – M line – Vertical l 7
TABLE OF CO TE TS
1 INTRODUCTION ............................................................................................... 11
1.1 SAFETY WARNINGS IN THE MANUAL ........................................................................................... 11
2 GENERAL INSTRUCTIONS ............................................................................... 12
2.1 QUALIFIED ERSONNEL ................................................................................................................ 12
2.2 SAFETY INSTRUCTIONS ................................................................................................................ 12
2.3 STANDARDS ................................................................................................................................... 12
2.4 ENVIRONMENTAL CONDITIONS .................................................................................................... 13
2.5 O ERATING CONDITIONS ............................................................................................................. 13
2.6 VOLTAGE AND FREQUENCY ......................................................................................................... 13
3 RECEIVING, HANDLING AND STORAGE ........................................................... 14
3.1 RECEIVING ..................................................................................................................................... 14
3.2 HANDLING ...................................................................................................................................... 14
3.2.1 Motor positioning ................................................................................................................................ 15
3.3 STORAGE ....................................................................................................................................... 15
3.3.1 Outdoor storage ................................................................................................................................. 15
3.3.2 Extended storage ............................................................................................................................... 15
3.3.2.1 Storage location .................................................................................................................. 15
3.3.2.1.1 Indoor storage ................................................................................................ 16
3.3.2.1.2 Outdoor storage ............................................................................................. 16
3.3.2.2 Separate parts .................................................................................................................... 16
3.3.3 reservation during the storage ........................................................................................................... 16
3.3.3.1 Space heater ....................................................................................................................... 16
3.3.3.2 Insulation resistance ............................................................................................................ 16
3.3.3.3 Exposed machined surfaces ................................................................................................ 16
3.3.3.4 Sealing ................................................................................................................................ 16
3.3.3.5 Bearings .............................................................................................................................. 17
3.3.3.5.1 Grease-lubricated rolling bearing ..................................................................... 17
3.3.3.5.2 Oil-lubricated rolling bearing ............................................................................ 17
3.3.3.5.3 Sleeve bearing ................................................................................................ 17
3.3.3.6 Terminal boxes .................................................................................................................... 17
3.3.3.7 Air-water heat exchanger .................................................................................................... 18
3.3.3.8 Cleanliness and conservation of the motor during storage ................................................... 18
3.3.3.9 Inspections and records during storage ............................................................................... 18
3.3.3.10 redictive / preventive maintenance..................................................................................... 18
3.3.3.11 Maintenance plan during storage ......................................................................................... 19
3.3.4 reparation for commissioning ............................................................................................................ 20
3.3.4.1 Cleaning .............................................................................................................................. 20
3.3.4.2 Bearing inspection ............................................................................................................... 20
3.3.4.3 Bearing lubrication ............................................................................................................... 20
3.3.4.4 Insulation resistance verification ........................................................................................... 20
3.3.4.5 Air-water heat exchanger .................................................................................................... 20
3.3.4.6 Others ................................................................................................................................. 20
4 INSTALLATION ................................................................................................. 21
4.1 INSTALLATION SITE ....................................................................................................................... 21
4.2 SHAFT LOCK .................................................................................................................................. 21
4.2.1 Axial lock ............................................................................................................................................ 21
4.2.2 Radial lock .......................................................................................................................................... 21
4.2.3 rocedure for replacing the radial locking device ................................................................................. 21
4.3 ROTATION DIRECTION ................................................................................................................... 21
4.4 INSULATION RESISTANCE ............................................................................................................. 22
4.4.1 Safety Instructions .............................................................................................................................. 22
4.4.2 General considerations ....................................................................................................................... 22
4.4.3 Measurement on the stator windings................................................................................................... 22
4.4.4 Additional Information ......................................................................................................................... 22
4.4.5 olarization Index ................................................................................................................................ 22
4.4.6 Conversion of the measured values ..................................................................................................... 23
4.4.7 Insulation assessment ......................................................................................................................... 23
4.5 ROTECTIONS ............................................................................................................................... 23
4.5.1 Thermal protections ............................................................................................................................ 23
4.5.1.1 Temperature limits for the windings ..................................................................................... 24
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8 l Installation, operation an 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 T100 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 AS ECTS ................................................................................................................. 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 AS ECTS ............................................................................................................... 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 RELIMINARY INS ECTION .......................................................................................................... 34
6.2 FIRST STARTING ........................................................................................................................... 34
6.2.1 Starting procedure ..............................................................................................................................34
6.3 O ERATION ................................................................................................................................... 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
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11371757 Installation, operation an maintenance manual – Squirrel cage motor – M line – Vertical l 9
7.3.4 Reimpregnation .................................................................................................................................. 37
7.3.5 Insulation Resistance .......................................................................................................................... 38
7.4 COOLING SYSTEM MAINTENANCE ............................................................................................... 38
7.5 RADIATOR MAINTENANCE ............................................................................................................ 38
7.6 VIBRATION...................................................................................................................................... 38
7.7 ANTI-REVERSION RATCHET MAINTENANCE ................................................................................ 38
7.8 SHAFT GROUNDING DEVICE ......................................................................................................... 38
7.9 BEARING MAINTENANCE .............................................................................................................. 39
7.9.1 Grease-lubricated rolling bearings ....................................................................................................... 39
7.9.1.1 Instructions for lubrication .................................................................................................... 39
7.9.1.2 rocedures for rolling bearing relubrication .......................................................................... 39
7.9.1.3 Rolling bearing relubrication with drawer device for grease removal ..................................... 39
7.9.1.4 Type and amount of grease ................................................................................................. 39
7.9.1.5 Alternative greases .............................................................................................................. 40
7.9.1.6 rocedure for changing the grease ...................................................................................... 41
7.9.1.7 Low temperature greases .................................................................................................... 41
7.9.1.8 Grease compatibility ............................................................................................................ 41
7.9.1.9 Disassembly – vertical bearings ........................................................................................... 41
7.9.1.9.1 Before disassembling ...................................................................................... 41
7.9.1.9.2 Lower bearing disassembly ............................................................................. 42
7.9.1.9.3 Upper bearing disassembly ............................................................................. 42
7.9.1.10 Bearing assembly ................................................................................................................ 42
7.9.2 Oil-lubricated rolling bearing ................................................................................................................ 42
7.9.2.1 Lubrication instructions........................................................................................................ 43
7.9.2.2 Oil type................................................................................................................................ 43
7.9.2.3 Oil change ........................................................................................................................... 43
7.9.2.4 Bearing operation ................................................................................................................ 43
7.9.2.5 Bearing disassembly ........................................................................................................... 44
7.9.2.6 Bearing assembly ................................................................................................................ 45
7.9.3 Rolling bearing replacement ................................................................................................................ 45
7.9.4 Sleeve bearings .................................................................................................................................. 45
7.9.4.1 Bearing data........................................................................................................................ 45
7.9.4.2 Bearing installation and operation ........................................................................................ 45
7.9.4.3 Cooling by water circulation ................................................................................................. 45
7.9.4.4 Oil change ........................................................................................................................... 45
7.9.4.5 Sealing ................................................................................................................................ 46
7.9.4.6 Sleeve bearing operation ..................................................................................................... 46
7.9.4.7 Sleeve bearing maintenance ................................................................................................ 46
7.9.4.8 Bearing disassembly and assembly ..................................................................................... 46
7.9.4.8.1 Thrust bearing (upper) ..................................................................................... 46
7.9.4.8.2 Guide bearing (lower) ...................................................................................... 47
7.9.5 Bearing protection .............................................................................................................................. 47
7.9.5.1 rotection settings .............................................................................................................. 47
7.9.5.2 Disassembly/assembly of the sleeve bearing temperature sensors ....................................... 47
8 MOTOR DISASSEMBLY AND ASSEMBLY .......................................................... 48
8.1 ARTS LIST .................................................................................................................................... 48
8.2 DISASSEMBLY ............................................................................................................................... 48
8.3 ASSEMBLY ..................................................................................................................................... 48
8.4 AIR-GA MEASUREMENT .............................................................................................................. 48
8.5 TIGHTENING TORQUE ................................................................................................................... 49
8.6 S ARE ARTS ................................................................................................................................ 50
9 MAINTENANCE LAN ....................................................................................... 51
10 ABNORMALITIES, CAUSES AND SOLUTIONS ................................................... 52
11 DECLARATION OF CONFORMITY ..................................................................... 54
12 ENVIRONMENTAL INFORMATION ..................................................................... 55
12.1 ACKAGE ....................................................................................................................................... 55
12.2 RODUCT ....................................................................................................................................... 55
12.3 HAZARDOUS WASTE ..................................................................................................................... 55
13 SERVICE NETWORK ........................................................................................ 55
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