5
INSTALLATION AND MAINTENANCE
LSA 42.2 - 2 & 4 POLE
ALTERNATORS
3433 en - 2010.10 / g
LEROY-SOMER
2 - TECHNICAL CHARACTERISTICS
2.1 - Electrical characteristics
The PARTNER LSA 42.2 alternator is generator without
sliprings and revolving eld brushes, wound as “2/3 pitch”; 12-
wire, with class H insulation and a eld excitation system
available in either “SHUNT” or “AREP” version (see sections
2.3, 2.4). Interference suppression conforms with standard EN
55011, group 1, class B.
2.1.1 - Options
- Stator temperature detection probes.
- Space heaters.
2.2 - Mechanical characteristics
- Steel frame
- End shields in cast iron
- Mounting arrangement
MD 35 :
single bearing with standard feet and SAE anges/coupling
discs.
B 34 :
two-bearing with SAE ange and standard cylindrical shaft
extension.
- Drip-proof machine, self-cooled
2.2.1 - Options
- Protection against harsh environmentsh.
- Air input lter, air output labyrinth cowling.
Alternators tted with air inlet lters should be derated by 5%
(power).
To prevent excessive temperature rise caused by clogged
lters, it is advisable to t the stator winding with thermal
sensors (PTC or PT100).
T1
T2 T3
T4
T5
T6
Varistor
+ -
Field
STATOR : 12 wires (T1 to T12 identification)
Exciter
T7
T8 T9
T10
T11
T12
+ -
Armature
MAIN FIELD
R 250
Voltage reference
5+
6 -
Red
Black
T1
T2 T3
T4
T5
T6
Varistor
+ -
Field
STATOR : 12 wires (T1 to T12 identification)
Exciter
T7
T8 T9
T10
T11
T12
+ -
Armature
MAIN FIELD
R 250
Voltage reference
5+
6 -
Red
Black
Aux. windings
Green
Yellow
Red
Black
T1
T2 T3
T4
T5
T6
Varistor
+ -
Field
STATOR : 12 wires (T1 to T 12 identification)
Voltage reference
5+
Exciter
6-
T7
T8 T9
T10
T11
T12
+ -
Armature
MAIN FIELD
R 438
White
Blue
Aux. windings
Green
Yellow
Red
Black
T1
T2 T3
T4
T5
T6
Varistor
+ -
Field
STATOR : 12 wires (T1 to T 12 identification)
Voltage reference
5+
Exciter
6-
T7
T8 T9
T10
T11
T12
+ -
Armature
MAIN FIELD
R 438
White
Blue
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