SDMO R570U, User And Maintenance Manual

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17
LEROY-SOMER
2011.03/ g
Installation and maintenance
LSA 47.2 - 4 POLES
ALTERNATORS
3742 en -
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)
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 wires
L9 0.0039 1.1 10.2 0.128
Resistance of AREP auxiliary windings
at 20°C (Ω)
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 wires
L9 0.168 0.34
Field excitation current i exc (A)
Symbols: “i exc”: excitation current of the
exciter field
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 wires
L9 0.95 3.7
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 Auxil wdg: X1, X2 Auxil wdg: Z1, Z2
50 Hz 70 V 10 V
60 Hz 85 V 12 V
4.8.3 - Table of weights
(values given for information only)
LSA 47.2 Total weight (kg) Rotor (kg)
VS2 1000 390
VS3 1000 390
S4 1130 445
S5 1130 445
M7 1255 495
M8 1300 515
L9 1400 550
After operational testing, it is essential to
replace all access panels or covers.
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