Specifications

13
INSTALLATION AND MAINTENANCE
LSA 50.1 / LSA 51.2
ALTERNATORS
SERVICING - MAINTENANCE
Réf. 3281 en - 10.2007 / g
LEROY-SOMER
has already been assembled.
4.7.3 - Electrical connection
- Connect the 3 PMG wires (14/15/16) to terminals X1,X2,Z2
on the AVR (see 2.3.2). If the alternator is being connected to
an AREP machine, the 4 auxiliary winding wires X1.X2.Z1.Z2
should be isolated using the domino fitting supplied with the
kit. Both field wires (5/6) and the voltage sensing wires (2/3)
remain in place.
Electrical characteristics of the PMG 4 :
Stator phase/phase resistance 20°C : 1.4 Ω
No-load A.C. voltage between phases at 1500 rpm : 250 V
4.8 - Table of electrical characteristics
Alternator - 4 poles - 50/60 Hz - Standard winding No. 6S.
(400V- 50 Hz 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).
4.8.1 - LSA 50.1 characteristics
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 - LSA 51.2 characteristics
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.
4.8.3 - Voltage of auxiliary windings at no load
LSA 50.1 STATOR L/
N
ROTOR Field Armature
S2 0.0028 0.354 9.35 0.052
S4 0.00195 0.385 9.35 0.052
M6 0.0015 0.43 9.35 0.052
M7 0.0013 0.46 9.35 0.052
L8 0.0012 0.5 9.35 0.065
VL10 0.00095 0.556 9.35 0.065
LSA 50.1 Auxil wdg : X1, X2 Auxil wdg : Z1, Z2
S2 0.105 0.215
S4 0.105 0.170
M6 0.085 0.185
M7 0.085 0.15
L8 0.08 0.15
VL10 0.08 0.18
LSA 50.1 No load At rated load
S2 1.05 5
S4 1.05 4.85
M6 1.1 4.9
M7 1.1 4.9
L8 1.3 5
VL10 1.3 5
LSA 51.2 STATOR L/
N
ROTOR Field Armature
S55 0.001 0.42 9.2 0.04
M60 0.0008 0.45 9.2 0.04
L70 0.0006 0.5 9.2 0.04
VL85 0.0005 0.58 9.2 0.04
LSA 51.2 Auxil wdg : X1, X2 Auxil wdg : Z1, Z2
S55 0.1 0.16
M60 0.08 0.16
L70 0.09 0.13
VL85 0.06 0.13
LSA 51.2 No load At rated load
S55 1.5 6
M60 1.5 5.9
L70 1.6 5.5
VL85 1.6 5
LSA 50.1 Auxil wdg : X1, X2 Auxil wdg : Z1, Z2
50 Hz 90 ... 100 V 10 V
60 Hz 108 ... 120 V 12 V
LSA 51.2 Auxil wdg : X1, X2 Auxil wdg : Z1, Z2
50 Hz 90 ... 100 V 10 V
60 Hz 108 ... 120 V 12 V