WEG WGM20 Series Owner's manual

Motors I Automation I Energy I Transmission & Distribution I Coatings

Three phase induction motors

cooled by water jacket

WGM20 line - Squirrel cage rotor

Horizontal and Vertical

Installation, Operation and Maintenance Manual

Document Number: 1000525 831

Material number: 14108242

Model: WGM20

Language: English

Revision: 01

March 2018

www.weg.net

14108242 Installation, o eration and maintenance manual – Squirrel cage motor – WGM20 Line l 5

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 PDF file is available at www.weg.net

or another printed copy may be requested.

WEG EQUI AMENTOS ELÉTRICOS S.A.

www.weg.net

14108242 Installation, o eration and maintenance manual – Squirrel cage motor – WGM20 Line l 7

TABLE OF CONTENTS

1 INTRODUCTION ............................................................................................... 11

1.1 SAFETY WARNINGS IN THE MANUAL ........................................................................................... 11

2 GENERAL INSTRUCTIONS ............................................................................... 12

2.1 QUALIFIED PERSONNEL ................................................................................................................ 12

2.2 SAFETY INSTRUCTIONS ................................................................................................................ 12

2.3 STANDARDS ................................................................................................................................... 12

2.4 ENVIRONMENTAL CONDITIONS .................................................................................................... 13

2.5 OPERATING CONDITIONS ............................................................................................................. 13

2. VOLTAGE AND FREQUENCY ......................................................................................................... 13

3 RECEIVING, HANDLING AND STORAGE ........................................................... 14

3.1 RECEIVING ..................................................................................................................................... 14

3.2 HANDLING ...................................................................................................................................... 14

3.2.1 Horizontal motor handling ................................................................................................................... 14

3.2.2 Vertical motor handling ....................................................................................................................... 15

3.2.3 Vertical motor positioning .................................................................................................................... 15

3.3 STORAGE ....................................................................................................................................... 15

3.3.1 Outdoor storage ................................................................................................................................. 15

3.3.2 Long term storage .............................................................................................................................. 15

3.3.2.1 Storage location .................................................................................................................. 1

3.3.2.1.1 Indoor storage ................................................................................................ 1

3.3.2.1.2 Outdoor storage ............................................................................................. 1

3.3.2.2 Separate parts .................................................................................................................... 1

3.3.3 Preservation during the storage ........................................................................................................... 1

3.3.3.1 Cooling system ................................................................................................................... 1

3.3.3.2 Space heater ....................................................................................................................... 1

3.3.3.3 Insulation resistance ............................................................................................................ 17

3.3.3.4 Exposed machined surfaces ................................................................................................ 17

3.3.3.5 Sealing ................................................................................................................................ 17

3.3.3. Bearings .............................................................................................................................. 17

3.3.3.7 Terminal boxes .................................................................................................................... 17

3.3.3.8 Cleanliness and conservation of the motor during storage ................................................... 17

3.3.3.9 Inspections and records during storage ............................................................................... 17

3.3.3.10 Predictive/preventive maintenance....................................................................................... 17

3.3.3.11 Maintenance plan during storage ......................................................................................... 18

3.3.4 Preparation for commissioning ............................................................................................................ 18

3.3.4.1 Cleaning .............................................................................................................................. 18

3.3.4.2 Bearing lubrication ............................................................................................................... 18

3.3.4.3 Insulation resistance verification ........................................................................................... 18

3.3.4.4 Cooling system ................................................................................................................... 18

3.3.4.5 Others ................................................................................................................................. 18

4 INSTALLATION ................................................................................................. 19

4.1 INSTALLATION SITE ....................................................................................................................... 19

4.2 SHAFT LOCK .................................................................................................................................. 19

4.3 ROTATION DIRECTION ................................................................................................................... 19

4.4 INSULATION RESISTANCE ............................................................................................................. 19

4.4.1 Safety Instructions .............................................................................................................................. 19

4.4.2 General considerations ....................................................................................................................... 19

4.4.3 Measurement on the stator windings................................................................................................... 19

4.4.4 Additional Information ......................................................................................................................... 20

4.4.5 Polarization Index ................................................................................................................................ 20

4.4. Conversion of the measured values ..................................................................................................... 20

4.4.7 Insulation assessment ......................................................................................................................... 20

4.5 PROTECTIONS ............................................................................................................................... 21

4.5.1 Thermal protections ............................................................................................................................ 21

4.5.2 Temperature limits for the windings ..................................................................................................... 21

4.5.3 Alarm and trip temperatures ................................................................................................................ 21

4.5.4 Installation of temperature sensors ...................................................................................................... 22

4.5.5 Temperature and ohmic resistance of the PT100 thermoresistance ..................................................... 23

4.5. Space heater ...................................................................................................................................... 23

4.5.7 Water leak sensor ............................................................................................................................... 23

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8 l Installation, o eration and maintenance manual – Squirrel cage motor – WGM20 Line 14108242

4.5.8 Water temperature sensor ...................................................................................................................23

4. COOLING ....................................................................................................................................... 24

4. .1 Cooling system ...................................................................................................................................24

4. .1.1 Cooling system characteristics ........................................................................................... 24

4. .1.2 Cooling water characteristics .............................................................................................. 24

4. .1.3 Cooling water temperature ................................................................................................. 24

4. .1.4 Protective devices .............................................................................................................. 24

4.7 ELECTRICAL ASPECTS ................................................................................................................. 25

4.7.1 Electrical connections .........................................................................................................................25

4.7.1.1 Main electrical connections ................................................................................................. 25

4.7.1.2 Grounding .......................................................................................................................... 25

4.7.2 Connection diagram ............................................................................................................................25

4.7.3 Accessories connection diagram .........................................................................................................25

4.8 MECHANICAL ASPECTS ............................................................................................................... 25

4.8.1 Base ...................................................................................................................................................25

4.8.2 Base loads ..........................................................................................................................................2

4.8.3 Base types ..........................................................................................................................................2

4.8.3.1 Concrete base .................................................................................................................... 2

4.8.3.2 Sliding base ........................................................................................................................ 2

4.8.3.3 Metal base ......................................................................................................................... 2

4.8.3.4 Anchor bolts ....................................................................................................................... 2

4.8.4 Natural frequency of the base ..............................................................................................................2

4.8.5 Leveling ..............................................................................................................................................27

4.8. Alignment ............................................................................................................................................27

4.8.7 Doweling .............................................................................................................................................28

4.8.8 Couplings ...........................................................................................................................................28

4.8.8.1 Direct coupling ................................................................................................................... 28

4.8.8.2 Gear coupling ..................................................................................................................... 28

4.8.8.3 Belt drive ............................................................................................................................ 28

5 STARTING ........................................................................................................ 30

5.1 DIRECT ON-LINE STARTING ......................................................................................................... 30

5.2 DIRECT ONLINE STARTING FREQUENCY ..................................................................................... 30

5.3 LOCKED ROTOR CURRENT .......................................................................................................... 30

5.4 STARTING WITH REDUCED CURRENT ......................................................................................... 30

COMMISSIONING ............................................................................................. 31

.1 PRELIMINARY INSPECTION .......................................................................................................... 31

.2 FIRST STARTING ........................................................................................................................... 31

.3 OPERATION ................................................................................................................................... 31

.3.1 General ...............................................................................................................................................31

.3.2 Temperatures......................................................................................................................................32

.3.3 Bearings .............................................................................................................................................32

.3.4 Cooling system ...................................................................................................................................32

.3.5 Vibration .............................................................................................................................................32

.3. Shutdown ...........................................................................................................................................32

7 MAINTENANCE ................................................................................................. 33

7.1 GENERAL ....................................................................................................................................... 33

7.2 GENERAL CLEANING .................................................................................................................... 33

7.3 WINDING INSPECTIONS ................................................................................................................ 33

7.4 WINDING CLEANING ..................................................................................................................... 33

7.4.1 Inspections .........................................................................................................................................33

7.4.2 Reimpregnation ...................................................................................................................................34

7.4.3 Insulation Resistance ...........................................................................................................................34

7.5 COOLING SYSTEM MAINTENANCE .............................................................................................. 34

7.5.1 Cleaning..............................................................................................................................................34

7.5.1.1 Motor end shield disassembly ............................................................................................. 34

7.5.1.2 Cooling heads disassembly ................................................................................................ 35

7.5.1.3 Inspection and cleaning of water channels .......................................................................... 35

7.5.1.4 End shields and cooling heads assembly ............................................................................ 35

7. VIBRATION ..................................................................................................................................... 35

7.7 MOTOR OUT OF OPERATION ....................................................................................................... 35

7.8 SHAFT GROUNDING DEVICE ........................................................................................................ 35

7.9 ENCODER MAINTENANCE ............................................................................................................ 3

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14108242 Installation, o eration and maintenance manual – Squirrel cage motor – WGM20 Line l 9

7.10 BEARING MAINTENANCE .............................................................................................................. 3

7.10.1 Bearing data ....................................................................................................................................... 3

7.10.2 Instructions for lubrication ................................................................................................................... 3

7.10.3 Procedures for bearing lubrication ....................................................................................................... 3

7.10.4 Type and amount of grease ................................................................................................................ 37

7.10.5 Alternative greases .............................................................................................................................. 37

7.10. Procedure for changing the grease ..................................................................................................... 37

7.10.7 Low temperature greases ................................................................................................................... 38

7.10.8 Grease compatibility ........................................................................................................................... 38

7.10.9 Bearing disassembly ........................................................................................................................... 38

7.10.9.1 DE horizontal bearing disassembly ...................................................................................... 39

7.10.9.2 NDE horizontal bearing disassembly .................................................................................... 39

7.10.9.3 DE vertical bearing disassembly .......................................................................................... 40

7.10.9.4 NDE vertical bearing disassembly ........................................................................................ 40

7.10.9.5 Bearing assembly ................................................................................................................ 41

7.10.9. Bearing insulation ................................................................................................................ 41

7.10.10Rolling bearing replacement ................................................................................................................ 41

7.10.11Bearing protection .............................................................................................................................. 41

7.10.11.1 Protection settings .............................................................................................................. 41

7.11 ACCESSORIES MAINTENANCE ....................................................................................................... 42

8 MOTOR DISASSEMBLY AND ASSEMBLY .......................................................... 43

8.1 HORIZONTAL MOTORS.................................................................................................................. 43

8.1.1 Disassembly ....................................................................................................................................... 43

8.1.2 Assembly ............................................................................................................................................ 43

8.2 VERTICAL MOTORS ....................................................................................................................... 44

8.2.1 Disassembly ....................................................................................................................................... 44

8.2.2 Assembly ............................................................................................................................................ 44

8.3 AIR-GAP MEASUREMENT .............................................................................................................. 45

8.4 TIGHTENING TORQUE ................................................................................................................... 45

8.5 SPARE PARTS ................................................................................................................................ 45

8.5.1 Necessary spare parts ........................................................................................................................ 45

8.5.2 Optional spare parts ........................................................................................................................... 45

9 MAINTENANCE PLAN ....................................................................................... 4

10 ABNORMALITIES, CAUSES AND SOLUTIONS ................................................... 47

11 ENVIRONMENTAL INFORMATION ..................................................................... 48

11.1 PACKAGE ....................................................................................................................................... 48

11.2 PRODUCT ....................................................................................................................................... 48

11.3 HAZARDOUS WASTE ..................................................................................................................... 48

12 DECLARATION OF CONFORMITY ..................................................................... 49

13 SERVICE NETWORK ........................................................................................ 50

14 WARRANTY TERM ........................................................................................... 50