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WEG MGW User Manual
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Installation, Operation and
Maintenance Manual
Document Num
ber: 1137175
7
Models:
MGA, MGP, MGD, MGT, MGV, MGF, MGR
, MGI, MGW
and
MGL
Language: E
nglish
Revision: 7
May 2018
2
4
Table of Contents
Default Chapter
7
Table of Contents
7
1 Introduction
11
Safety Warnings in the Manual
11
2 General Instructions
12
Qualified Personnel
12
Safety Instructions
12
Standards
12
Environmental Conditions
13
Operating Conditions
13
Voltage and Frequency
13
3 Receiving, Handling and Storage
14
Receiving
14
Handling
14
Motor Positioning
15
Storage
15
Outdoor Storage
15
Extended Storage
15
Storage Location
15
Indoor Storage
16
Outdoor Storage
16
Separate Parts
16
Preservation During the Storage
16
Exposed Machined Surfaces
16
Insulation Resistance
16
Sealing
16
Space Heater
16
Bearings
17
Grease-Lubricated Rolling Bearing
17
Oil-Lubricated Rolling Bearing
17
Sleeve Bearing
17
Terminal Boxes
17
Air-Water Heat Exchanger
18
Cleanliness and Conservation of the Motor During Storage
18
Inspections and Records During Storage
18
Predictive / Preventive Maintenance
18
Maintenance Plan During Storage
19
Preparation for Commissioning
20
Air-Water Heat Exchanger
20
Bearing Inspection
20
Bearing Lubrication
20
Cleaning
20
Insulation Resistance Verification
20
Others
20
4 Installation
21
Installation Site
21
Shaft Lock
21
Axial Lock
21
Radial Lock
21
Procedure for Replacing the Radial Locking Device
21
Rotation Direction
21
Insulation Resistance
22
Safety Instructions
22
General Considerations
22
Measurement on the Stator Windings
22
Additional Information
22
Polarization Index
22
Conversion of the Measured Values
23
Insulation Assessment
23
Protections
23
Thermal Protections
23
Alarm and Trip Temperatures
24
Temperature Limits for the Windings
24
Space Heater
25
Temperature and Ohmic Resistance of the PT100 Thermoresistance
25
Water Leak Sensor
25
Cooling
25
Air-Water Heat Exchange Cooling
25
Radiators for Application with Seawater
25
Independent Ventilation Cooling
26
Electrical Aspects
26
Electrical Connections
26
Grounding
26
Main Electrical Connections
26
Connection Diagrams
27
Connection Diagrams According to IEC60034-8
27
Stator Connection Diagrams
27
Accessory Connection Diagrams
28
Connection Diagrams According to NEMA MG1
28
Rotation Direction
28
Stator Connection Diagrams
28
Mechanical Aspects
29
Base
29
Base Loads
29
Motor Mounting
29
Motor with Hollow Shaft and Flange
29
Motor with Solid Shaft and Flange
29
Anchor Plate Set
29
Natural Frequency of the Base
30
Leveling
30
Alignment
30
Hollow Shaft Motor Alignment
31
Doweling
31
Couplings
31
Belt Drive
32
Coupling for Hollow Shaft Motors
32
Direct Coupling
32
Gear Coupling
32
Hydraulic Unit
32
5 Starting
33
Direct On-Line Starting
33
Direct Online Starting Frequency
33
Locked Rotor Current
33
Starting with Reduced Current
33
6 Commissioning
34
Preliminary Inspection
34
First Starting
34
Starting Procedure
34
Operation
35
General
35
Temperatures
35
Bearings
35
High-Pressure Oil Injection System
35
Radiators
35
Vibration
36
Shaft Vibration Limits
36
Shutdown
36
7 Maintenance
37
General
37
General Cleaning
37
Winding Maintenance
37
Winding Inspection
37
Winding Cleaning
37
Inspections
37
Reimpregnation
37
Insulation Resistance
38
Cooling System Maintenance
38
Radiator Maintenance
38
Vibration
38
Anti-Reversion Ratchet Maintenance
38
Shaft Grounding Device
38
L Installation, Operation and Maintenance Manual – Squirrel Cage Motor – M Line – Vertical
38
Bearing Maintenance
39
Grease-Lubricated Rolling Bearings
39
Instructions for Lubrication
39
Procedures for Rolling Bearing Relubrication
39
Rolling Bearing Relubrication with Drawer Device for Grease Removal
39
Type and Amount of Grease
39
Alternative Greases
40
Before Disassembling
41
Disassembly - Vertical Bearings
41
Grease Compatibility
41
Low Temperature Greases
41
Procedure for Changing the Grease
41
Bearing Assembly
42
Lower Bearing Disassembly
42
Upper Bearing Disassembly
42
Oil-Lubricated Rolling Bearing
42
Bearing Operation
43
Lubrication Instructions
43
Oil Change
43
Oil Type
43
Bearing Disassembly
44
Bearing Assembly
45
Rolling Bearing Replacement
45
Sleeve Bearings
45
Bearing Data
45
Bearing Installation and Operation
45
Cooling by Water Circulation
45
Oil Change
45
Bearing Disassembly and Assembly
46
Sealing
46
Sleeve Bearing Maintenance
46
Sleeve Bearing Operation
46
Thrust Bearing (Upper)
46
Guide Bearing (Lower)
47
Bearing Protection
47
Disassembly/Assembly of the Sleeve Bearing Temperature Sensors
47
Protection Settings
47
8 Motor Disassembly and Assembly
48
Parts List
48
Disassembly
48
Assembly
48
Air-Gap Measurement
48
Tightening Torque
49
Spare Parts
50
9 Maintenance Plan
51
10 Abnormalities, Causes and Solutions
52
11 Declaration of Conformity
54
12 Environmental Information
55
Package
55
Product
55
Hazardous Waste
55
13 Service Network
55
5
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WEG MGW Specifications
General
Brand
WEG
Model
MGW
Category
Engine
Language
English
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