2018.01 / g
17
Electric Power Generation
Installation and maintenance
LSA 44.3
Low Voltage Alternators - 4 pole
5056 en -
4.7 - Installation and maintenance of
the PMG
The PMG reference is PMG 7. See the PMG
maintenance manual, ref: 4211.
After operational testing, it is essential to
replace all access panels or covers. Don’t
forget the screw [29] earth continuity.
4.8 - Table of characteristics
Table of average values:
Alternator - 2 and 4 poles - 50 Hz/60 Hz -
Winding n° 6 and M or M1 connected in
dedicated single-phase. (400 V 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% (for exact values, consult
the test report) and are subject to change
without prior warning. For 60 Hz machines,
the resistance values are the same and the
excitation current «i exc» is approximately 5
to 10% weaker.
• SHUNT resistances at 20°C (Ω)
Type
L/N stator Rotor Exciter
field Armature
S2
0.0503 2.354 11.647
0.422
S3
0.0503 2.354 11.647
0.422
S4
0.039
2.578 12.941 0.459
S5
0.039
2.578 12.941 0.459
M6
0.0335 2.805 12.941 0.459
M8
0.0287 3.032 12.941 0.459
L10
0.0236 3.291 12.941 0.459
• SHUNT excitation current - 400 V - 50 Hz
“i exc”: excitation current of the exciter field
Type
At no load
On load
S2
0.74
2.03
S3
0.74
2.27
S4
0.71
2.06
S5
0.71
2.24
M6
0.65
2.39
M8
0.62
2.30
L10
0.66
2.36
• AREP resistances at 20°C (Ω)
Type
L/N stator Rotor Exciter
field Armature
S2
0.0503 2.354 7.262
0.422
S3
0.0503 2.354 7.262
0.422
S4
0.039
2.578 8.068
0.459
S5
0.039
2.578 8.068
0.459
M6
0.0335 2.805 8.068
0.459
M8
0.0287 3.032 8.068
0.459
L10
0.0236 3.291 8.068
0.459
• AREP resistances at 20°C (Ω) on the
auxiliary windings
Type
Winding X1, X2
Winding Z1, Z2
S2
0.341
0.627
S3
0.341
0.627
S4
0.304
0.571
S5
0.304
0.571
M6
0.288
0.575
M8
0.271
0.559
L10
0.247
0.524
• AREP excitation current - 400 V - 50 Hz
“i exc”: excitation current of the exciter field.
Type
At no load
On load
S2
0.96
2.61
S3
0.96
2.92
S4
0.92
2.65
S5
0.92
2.89
M6
0.83
3.08
M8
0.8
2.97
L10
0.85
3.05
