Table of Contents
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4.6.3
4.6.4
4.7
VOLTAGE REGULATOR ............................................................................................................. 23
4.8
AUXILIARY EXCITER ................................................................................................................... 23
4.9
ELECTRICAL ASPECTS ............................................................................................................. 23
4.9.1
4.9.2
4.10
MECHANICAL ASPECTS ........................................................................................................... 24
4.10.1
4.10.2
4.10.3
5
START-UP ....................................................................................................... 26
5.1
PRELIMINARY INSPECTION ...................................................................................................... 26
5.2
INITIAL OPERATION ................................................................................................................... 26
5.2.1
5.2.2
5.2.3
5.3
SHUTDOWN ............................................................................................................................... 27
5.4
PARALLEL ALTERNATORS ........................................................................................................ 27
5.4.1
6
MAINTENANCE ................................................................................................ 28
6.1
EMERGENCY GENERATOR GROUPS ....................................................................................... 28
6.2
CLEANING ................................................................................................................................. 28
6.3
NOISE ......................................................................................................................................... 28
6.4
VIBRATION ................................................................................................................................. 28
6.5
BEARINGS ................................................................................................................................. 28
6.5.1
6.5.2
6.6
MAINTENANCE OF THE EXCITER .............................................................................................. 29
6.6.1
6.6.2
6.6.3
6.6.4
6.6.5
6.7
AIR FLOW ................................................................................................................................... 30
6.8
MAINTENANCE OF THE COOLING SYSTEM ............................................................................. 30
6.8.1
6.9
ALTERNATOR OUT OF OPERATION .......................................................................................... 31
6.10
SHAFT GROUNDING DEVICE .................................................................................................... 31
6.10.1
6.10.2
6.11
COMPLETE CHECKUP .............................................................................................................. 32
7
DISASSEMBLY AND ASSEMBLY OF THE ALTERNATOR ................................... 33
7.1
DISASSEMBLY ........................................................................................................................... 33
7.2
ASSEMBLY ................................................................................................................................ 33
7.3
SPARE PARTS ........................................................................................................................... 33
8
l
Installation, operation and maintenance manual
Diode protection .......................................................................................................... 23
Protections on the voltage regulator ............................................................................. 23
4.6.4.1
Protection against underfrequency ........................................................................... 23
Electrical connections .................................................................................................. 23
4.9.1.1
Main connection ....................................................................................................... 23
4.9.1.2
Grounding ................................................................................................................ 23
4.9.1.3
Electronic voltage regulator ....................................................................................... 23
4.9.1.4
Terminal identification ............................................................................................... 24
4.9.1.5
Electrical connection of the voltage regulator ............................................................ 24
Accessories ................................................................................................................. 24
4.9.2.1
Excitation and sensing .............................................................................................. 24
4.9.2.2
Parallel operation ...................................................................................................... 24
4.9.2.3
Differential protection ................................................................................................ 24
Bases and foundations ................................................................................................ 24
Alignment and leveling ................................................................................................. 24
Coupling ...................................................................................................................... 25
Temperatures .............................................................................................................. 26
Bearings ...................................................................................................................... 26
Radiator ....................................................................................................................... 27
Parallel to each other and/or to the line ........................................................................ 27
Lubrication ................................................................................................................... 28
6.5.1.1
Type and amount of grease ...................................................................................... 28
6.5.1.2
Instructions for lubrication ......................................................................................... 28
6.5.1.3
Relubrication of bearing with the alternator operating ................................................ 29
Bearing ........................................................................................................................ 29
6.5.2.1
Bearing replacement ................................................................................................ 29
Exciter .......................................................................................................................... 29
Diode test .................................................................................................................... 29
Diode Replacement ..................................................................................................... 30
Varistor test .................................................................................................................. 30
Varistor replacement .................................................................................................... 30
Maintenance of the radiators ........................................................................................ 30
Grounding with internal brush ...................................................................................... 31
Grounding with external brush ..................................................................................... 31
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