2018.11 / m
5
Electric Power Generation
Installation and maintenance
LSA 40
Low Voltage Alternators - 4 pole
4455 en -
2 - TECHNICAL CHARACTERISTICS
2.1 - Electrical characteristics
This alternator is generator without sliprings
and revolving field brushes, wound as “2/3
pitch”; 4 or 12-wire, with class H insulation
and a field excitation system available in
either SHUNT or AREP version.
In order to conform to standard EN 61000-
6-3, EN 61000-6-2, EN 55011, the R 791
interference suppression kit is needed.
• Electrical options
- Stator temperature detection probes
- Space heaters
2.2 - Mechanical characteristics
- Steel frame
- End shields in cast iron
- Greasable ball bearings
- 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
• Mechanical options
- Direct power output by (non reconnectable)
cables, regulator fitted outside the alternator.
- Protection against harsh environmentsh.
- Air input filter, air output labyrinth cowling.
Alternators fitted with air inlet filters should
be derated by 5% (power).
To prevent excessive temperature rise
caused by clogged filters, it is advisable to fit
the stator winding with thermal sensors
(PTC).
T1
T2
Varistor
Field
STATOR : 4 wires (T1 to T4 identification)
Exciter
T3
T4
Armature
MAIN FIELD
R221
Power supply / Detection
5+
6 -
• SHUNT dedicated single-phase 4-wire
