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Marathon Electric
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MAGNAMAX
Marathon Electric MAGNAMAX User Manual
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1
MAGNAMAX
GENERATOR
INSTALLATION
OPERATION, AND
MAINTENANCE
MANUAL
2
Table of Contents
Table of Contents
2
Safety
6
General Information
7
Mechanical Design
7
General
7
Conduit Box
7
Magnamax Unirotor
7
TM Construction
7
Adapters and Drive Discs
7
Electrical Design
8
Temperature Rise
8
Standby Generator Ratings
8
Premium Insulation System
8
Power Factor
8
Magnamax Voltage Regulator
8
How to Read a Model Number
9
Installation
10
Receiving Your Magnamax Generator
10
Unpacking and Handling
10
Storage
10
Preparation for Use
10
Generator Mounting - Single Bearing
10
Generator Mounting-Two Bearing
11
Belt Drive
11
Environmental Concerns
11
Electrical Connections
12
Generator Lead Connections
12
12 Lead High Wye Connection
13
12 Lead Low Wye Connection
13
12 Lead High Delta Connection
14
12 Lead Low Delta Connection
14
10 Lead High Wye Connection
15
10 Lead Low Wye Connection
15
Lead Wye Connection
16
Lead Delta Connection
16
Lead Delta Connection
17
Lead Wye Connection
17
Double Delta -- Single Phase Connection
18
Low Zig Zag -- Single Phase Connection
18
High Zig Zag -- Single Phase Connection
18
Paralleling Operations
19
Prime Mover
19
Voltage Regulator
19
Switchgear
19
Paralleling Basics
19
Reactive Load Control
20
Paralleling Circuitry
20
Thyristor or Scr Loading
21
Operation
21
Pre-Start Inspection
21
Starting-Up the Generator
22
Field Flashing
22
Voltage Adjustments
22
Other Adjustments
23
Maintenance
23
General Information
23
Air Intake and Exhaust
23
Electrical Connections, Windings
24
Lubrication
24
Drying Electrical Insulation
26
Space Heaters
26
Oven
26
Forced Air
26
Short Circuit" Method
26
Cleaning Methods
27
Solvents
27
Cloth and Compressed Air
27
Brushing and Vacuum Cleaning
27
Shell Blasting
27
Steam Cleaning
27
Disassembly
28
Removal from Prime Mover
28
Conduit Box Removal
29
Exciter Stator (Field) Removal
30
Exciter Armature (Rotor) Removal
30
Pmg Stator Removal
31
Main Rotor Removal
33
Front End Bracket Removal
35
Exciter Inspection
35
Exciter Stator
35
Exciter (Rotor) Armature
36
Pmg Inspection
37
Pmg Stator
37
Pmg Rotor
37
Main Rotor Inspection
37
Bearing
37
Fan
38
Main Rotor Core and Windings
40
Drive Discs (Single Bearing Generators Only)
40
Front (Exciter) End Bracket Inspection
40
Drive End Bracket or Sae Adapter Inspection
41
Main Stator Inspection
42
Front End Bracket Installation
42
Main Rotor Installation
42
Pmg Installation
45
Exciter Installation
46
Conduit Box Installation
47
Assembly to Prime Mover
48
Troubleshooting
50
Introduction
50
Symptom
51
Voltage or Residual Voltage
51
Low Voltage
52
No Load
52
Low Voltage When Load Is Applied
53
High Voltage
53
Voltage Is Fluctuating
54
Operates Satisfactorily When Cold, but Shuts down When Warm
54
Builds Voltage from Startup,Then Goes to Low (Residual) Voltage
54
Equipment Runs Normally on Utility Power, but will Not Run on Generator Set
54
Generator Testing
55
Visual Inspection
55
Constant Excitation
55
(12V Battery) Test
55
Measuring Voltages
56
Typical Voltage Measurements
57
Generator Output Voltage
57
Regulator Output (Exciter Stator Input)
57
Regulator Sensing
57
Regulator Input Volts (PMG Output Volts)
57
Current (Amp) Measurements
57
Measuring Resistance
58
Main Stator
58
Exciter Rotor
58
Testing Diodes (Rectifiers)
58
Insulation Resistance - Main Stator
59
Generator Testing
59
Insulation Resistance - Main Rotor
59
Insulation Resistance - Exciter Stator
60
Insulation Resistance - Exciter Rotor
60
Main Rotor Field Ac Impedance Test
60
Magnamax Exploded View
61
Standard Tools
64
Special Tools
65
Miscellaneous
66
Preparation for Shipment or Extended Storage
66
Shipping Instructions
66
Storage Instructions
66
4
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Marathon Electric MAGNAMAX Specifications
General
Brand
Marathon Electric
Model
MAGNAMAX
Category
Portable Generator
Language
English
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