5
2022.11 / l
Electric Power Generation
Installation and maintenance
LSA 49.3
Low Voltage Alternator - 4 pole
5280 en -
2 - TECHNICAL
CHARACTERISTICS
2.1 - Electrical characteristics
This alternator is a machine without
sliprings or revolving armature brushes,
wound as “2/3 pitch”
, 6 or 12-wire, with
class H insulation and a field excitation
system available in either AREP or PMG
version
(see diagrams and AVR manuals).
• Electrical options
- Stator temperature detection sensors
- Space heaters
- Terminal box with mounting kit for protec-
tion or measurement C.T.
- R791 interference suppression
2.2 - Mechanical characteristics
- Steel frame
- Cast iron end shields
-
Protected ball bearings, greased for life
- Mounting arrangement: single bearing
with standard feet and SAE flanges/
coupling discs, two-bearing with SAE flange
and standard cylindrical shaft extension
- Drip-proof machine, self-cooled
- Degree of protection: IP 23
• Mechanical options
- Protection against harsh environments
- Regreasable ball bearings
- Air inlet filter, air outlet filter: IP 44
To prevent excessive temperature rise
caused by clogged filters, it is advisable to
monitor the stator winding with thermal
sensors (PTC or PT100).
- Bearing temperature detection sensors
• AREP three-phase 6 or 12-wire
• PMG three-phase 6 or 12-wire
Varistor
Varistor
T1
T2
T3
T4
T5
T6
5+
6-
T7
T8
T9
T10
T11
T12
T1
T2
T3
T4
T5
T6
5+
6-
T7
T8
T9
T10
T11
T12
PMG
D350
D350
STATOR: 6 or 12-wire (marking T1 to T12)
STATOR: 6 or 12-wire (marking T1 to T12)
Auxiliary windings
MAIN FIELD
Voltage reference
MAIN FIELD
Voltage reference
EXCITER
Field
Armature
EXCITER
Field
Armature
