16
INSTALLATION AND MAINTENANCE
LSA R 49.1 Air/air heat exchanger
ALTERNATORS - Ex II 3 G
SERVICING - MAINTENANCE
4081 en - 09.2006 / a
LEROY-SOMER
4.6.8 - Complete reassembly
- Place the "O" ring seal (349) and the preloading wavy
washer (79) in the bearing seat (36).
- Mount and fix the rear flange (82) on the rear base (36).
- Mount the rotor (4) in the stator (1).
- Mount and fix the front bush (30).
- Remount the tube casings (116).
- Remount the front and rear tubes (77) in the inner bearing
caps.
- Remount the access plates (140).
- Remount and fix the the front flange (410).
- Fix the inner cap (68).
- Remount the V-Ring gasket (247).
- Remount the V-Ring gasket (249).
- Remount the turbine cover (117).
- Remount the turbine (118).
- Remount the air intake grid (51).
- Reconnect the field system and close the terminal box.
4.7 - Table of characteristics
Table of average values.
Alternator - 4 poles - 50 Hz - Standard winding No. 6.
(400V for the excitation values).
The voltage and current values are given for no-load
operation and operation at rated load with separate field
excitation. All values are given at ± 10% and may be changed
without prior notification (for exact values, consult the test
report).
4.7.1 - Resistances of main windings at 20°C
(
Ω
)
Average values for 6S winding - (6 wires)
4.7.2 - Field excitation current i exc (A)
4.7.3 - Voltage of auxiliary windings at no load
For 60 Hz machines, the "i exc" values are approximately 5
to 10% lower.
LSA 49.1
STATOR L/N
ROTOR
Field
Armature
L6
0.0029
0.38
12
0.08
L9
0.0021
0.43
12
0.08
LSA 49.1
No load
At rated load
L6
0.5
2.2
L9
0.9
2.2
LSA 49.1
X1, X2
Z1, Z2
50 Hz
70 V
10 V
60 Hz
85 V
12 V