16
INSTALLATION AND MAINTENANCE
LSA 47.2 - 4 POLES
ALTERNATORS
SERVICING - MAINTENANCE
3742 en - 06.2007 / d
LEROY-SOMER
4.8 - 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 to within ± 10% and may be
changed without prior notification (for exact values, consult
the test report).
4.8.1 - Average values for the LSA 47.2
Resistances at 20 °C (
Ω
)
Resistance of AREP auxiliary windings at 20 °C (
Ω
)
Field excitation current i exc (A)
Symbols: “i exc”: excitation current of the exciter field.
For 60 Hz machines, the “i exc” values are approximately 5 to
10% lower.
4.8.2 - Voltage of auxiliary windings at no load
LSA 47.2
L/N stator
Rotor
Field
Armature
VS2
0.0081
0.77
10.2
0.128
VS3
0.0081
0.77
10.2
0.128
S4
0.0063
0.88
10.2
0.128
S5
0.0063
0.88
10.2
0.128
M7
0.0045
0.98
10.2
0.128
M8
0.0047
1.03
10.2
0.128
L9
0.0039
1.1
10.2
0.128
LSA 47.2 6 wire
L9
0.0039
1.1
10.2
0.128
LSA 47.2
Auxil wdg: X1, X2
Auxil wdg: Z1, Z2
VS2
0.2
0.38
VS3
0.2
0.38
S4
0.195
0.40
S5
0.195
0.40
M7
0.165
0.33
M8
0.17
0.35
L9
0.168
0.34
LSA 47.2 6 wire
L9
0.168
0.34
LSA 47.2
No load
At rated load
VS2
1
4
VS3
1
4
S4
0.9
3.4
S5
0.9
3.8
M7
1
3.65
M8
0.85
3.7
L9
0.95
3.75
LSA 47.2 6 wire
L9
0,95
3.75
LSA 47.2
Auxil wdg: X1, X2
Auxil wdg: Z1, Z2
50 Hz
70 V
10 V
60 Hz
85 V
12 V
