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10 l Installation, operation and maintenance manual – Synchronous Alternator – AG10 line - Horizontal 12638144
4.6.5.1 Protection against underfrequency..................................................................................27
4.7 VOLTAGE REGULATOR................................................................................................................27
4.7.1 Maintenance of the short-circuit current.............................................................................27
4.8 ELECTRICAL FEATURES..............................................................................................................27
4.8.1 Electrical connections.......................................................................................................27
4.8.1.1 Main connection............................................................................................................27
4.8.1.1.1 Cables connection......................................................................................28
4.8.1.2 Grounding.....................................................................................................................28
4.8.1.3 Electronic voltage regulator.............................................................................................28
4.8.1.4 Terminal identification.....................................................................................................28
4.8.2 Main connection diagrams................................................................................................29
4.8.2.1 Three-phase alternators – Multi-voltage...........................................................................29
4.8.2.2 Three-phase alternators – Single voltage......................................................................... 30
4.8.2.3 Three-phase alternators with single-phase connection...................................................... 31
4.8.2.4 Electrical connections of the voltage regulator..................................................................31
4.8.3 Accessories connection diagram.......................................................................................32
4.8.3.1 Stator thermostats.........................................................................................................32
4.8.3.2 Bearing thermostats.......................................................................................................32
4.8.3.3 Stator thermoresistances................................................................................................32
4.8.3.4 Bearing thermoresistances............................................................................................. 32
4.8.3.5 Space heaters...............................................................................................................32
4.9 MECHANICALFEATURES.............................................................................................................33
4.9.1 Bases and foundations .....................................................................................................33
4.9.2 Alignment and leveling......................................................................................................33
4.9.2.1 Alternators with double bearing (B35T or B3T).................................................................33
4.9.2.2 Alternators with single bearing (B15T)..............................................................................33
4.9.2.3 Rotor turning.................................................................................................................34
4.9.3 Coupling ..........................................................................................................................34
4.9.3.1 Alternators with double bearing (B35T/ B3T)...................................................................34
4.9.3.1.1 Direct coupling...........................................................................................34
4.9.3.1.2 Coupling by pulleys and belts......................................................................34
4.9.3.2 Alternator with single bearing (B15T) ............................................................................... 34
4.9.3.2.1 “G” dimension............................................................................................34
4.9.3.2.2 Change of G dimension..............................................................................35
5COMMISSIONING ................................................................................................. 36
5.1 PRELIMINARY TEST.....................................................................................................................36
5.2 INITIAL OPERATION .....................................................................................................................36
5.3 SHUTDOWN.................................................................................................................................37
5.4 ALTERNATORSIN PARALLEL.......................................................................................................37
5.4.1 With each other and / or with the network..........................................................................37
6MAINTENANCE..................................................................................................... 38
6.1 EMERGENCY GENERATORSETS.................................................................................................38
6.2 CLEANING...................................................................................................................................38
6.3 NOISE..........................................................................................................................................38
6.4 VIBRATION...................................................................................................................................38
6.4.1 Vibration measuring..........................................................................................................38
6.5 BEARINGS...................................................................................................................................38
6.5.1 Lubrication.......................................................................................................................38
6.5.2 Type and amount of grease...............................................................................................38
6.5.3 Instructions for lubrication.................................................................................................39
6.5.4 Procedures for relubrication of bearings.............................................................................39
6.5.5 Exchange of bearings .......................................................................................................39
6.5.5.1 Alternator with single bearing - B15T...............................................................................39
6.5.5.2 Alternator with double bearing - B35T.............................................................................40
6.5.5.3 Bearing replacement......................................................................................................40
6.6 MAINTENANCE OF THE EXCITER .................................................................................................40
6.6.1 Exciter..............................................................................................................................40
6.6.2 Test on the diodes............................................................................................................40
6.6.3 Replacement of the diodes................................................................................................40
6.6.4 Test on varistor.................................................................................................................41
6.6.5 Replacement of the varistor...............................................................................................41
6.6.6 Test on the capacitor........................................................................................................41
6.6.7 Replacement of the capacitor............................................................................................41
