Low Voltage alternators - 4 pole
LSA 51.2
1860 to 2500 kVA - 50 Hz / 2235 to 3000 kVA - 60 Hz
Electrical and mechanical data
4164 en - 2012.01 / e
Low Voltage alternators 4 pole 3-phase
LSA 51.2
1860 to 2500 kVA - 50 Hz / 2235 to 3000 kVA - 60 Hz
SPECIALLY ADAPTED TO APPLICATIONS
The LSA 51.2 alternator is designed to be suitable for typical generator applications, such as: backup, marine applications, rental,
telecommunications, etc.
COMPLIANT WITH INTERNATIONAL STANDARDS
The LSA 51.2 alternator conforms to the main international standards and regulations:
- IEC 60034, NEMA MG 1.32-33, ISO 8528-3, CSA / UL 1146 (UL 1004 on request), marine regulations, etc.
It can be integrated into a CE marked generator.
The LSA 51.2 is designed, manufactured and marketed in an ISO 9001 environment and ISO 14001.
TOP OF THE RANGE ELECTRICAL PERFORMANCE
● Class H insulation.
● Standard 6-wire winding, 2/3 pitch, type no. 6S.
● Voltage range 50 Hz: 380V - 400V - 415V - 440 V and 220V - 230V - 240V.
● Voltage range 60 Hz: 380V - 416V - 440V - 480V and 220 V - 240 V.
● High efficiency and motor starting capacity.
● Other voltages are possible with optional adapted windings:
- 50 Hz : 440 V (no. 7S), 500 V (no. 9S), 600 V (no. 22S or 23S), 690 V (no. 10S or 52S).
- 60 Hz : 380 V and 416 V (no. 8S), 600 V (no. 9S).
● R 791 interference suppression conforming to standard EN 55011 group 1 class B standard for European zone (CE marking).
EXCITATION AND REGULATION SYSTEM SUITED TO THE APPLICATION
The LSA 51.2 can be supplied with AREP or PMG excitation system, according to the alternator specification.
Standard excitation system is AREP with R 449 A.V.R.
Excitation system
Regulation options
AREP + PMI
PMG
Current
transformer
for paralleling
R449
Std
Option
C.T.
R726
D510C
Option
Option
C.T.
included
Volage
regulator
Voltage regulator accuracy ± 0.5% -
Mains
paralleling
3-phase sensing for
mains paralleling
unbalanced
Remote voltage
potentiometer
R731
R734
√
included
contact factory
√
3-phase
sensing
√ : possible mounting
PROTECTION SYSTEM SUITED TO THE ENVIRONMENT
● The LSA 51.2 is IP 23.
● Standard winding protection for clean environments with relative humidity ≤ 95 %, including indoor marine environments.
Options : ● Filters on air inlet : derating 5%.
● Filters on air inlet and air outlet (IP 44) : derating 8%.
● Winding protections for harsh environments and relative humidity greater than 95%.
● Space heaters.
● Thermal protection for winding.
REINFORCED MECHANICAL STRUCTURE USING FINITE ELEMENT MODELLING
● Compact and rigid assembly to better withstand generator vibrations.
● Steel frame.
● Cast iron flanges and shields.
● Twin-bearing and single-bearing versions designed to be suitable for engines on the market.
● Half-key balancing.
● Regreasable bearings.
ACCESSIBLE TERMINAL BOX PROPORTIONED FOR OPTIONAL EQUIPMENT
● Easy access to the voltage regulator and to the connections.
● Possible inclusion of accessories for paralleling, protection and measurement.
2
Ref : 4164 en
Low Voltage alternators 4 pole 3-phase
LSA 51.2
1860 to 2500 kVA - 50 Hz / 2235 to 3000 kVA - 60 Hz
General characteristics
Insulation class
Winding pitch
Number of wires
Protection
Altitude
Overspeed
Air flow
H
2/3 (n° 6S)
6
IP 23
≤ 1000 m
2250 min-1
2.5 m3/s (50 Hz) - 2.8 m3/s (60 Hz)
Excitation system
AVR type
Voltage regulation (*)
Short-circuit current
Totale Harmonic distortion THD (**)
Waveform: NEMA = TIF (**)
AREP + PMI or PMG
R 449
± 0.5 %
300% (3 IN) : 10s
<4%
< 50
(*) Steady state. (**) Total harmonic distortion between phases, no-load or on-load (non-distorting)
Ratings 50 Hz - 1500 R.P.M.
kVA / kW - P.F. = 0.8
Duty/T°C
Class/T°K
Continuous duty/40°C
H/125°K
Continuous duty/40°C
F/105°K
3 ph.
Phase
Y
380V
400V
415V
∆*
220V
230V
240V
LSA 51.2 S55
1860
1488
2050
1640
2200
1760
2360
1888
2500
2000
kVA
kW
LSA 51.2 M60 kVA
kW
LSA 51.2 L70
kVA
kW
LSA 51.2 VL90 kVA
kW
LSA 51.2 VL95 kVA
kW
Stand-by/40°C
H/150°K
3 ph.
440V
380V
400V
415V
220V
230V
240V
1690
1352
1864
1491
2000
1600
2145
1716
2250
1800
1700
1360
1870
1496
2005
1604
2150
1720
2280
1824
Stand-by/27°C
H/163°K
3 ph.
440V
380V
400V
415V
220V
230V
240V
1540
1232
1700
1360
1825
1460
1955
1564
2052
1642
1955
1564
2155
1724
2330
1864
2500
2000
2650
2120
3 ph.
440V
380V
400V
415V
220V
230V
240V
2045
1636
2255
1804
2420
1936
2595
2076
2750
2200
1792
1433
1975
1580
2120
1696
2275
1820
2385
1908
440V
1860
1488
2050
1640
2200
1760
2360
1888
2475
1980
∆* : Consult factory
Ratings 60 Hz - 1800 R.P.M.
kVA / kW - P.F. = 0.8
Duty/T°C
Class/T°K
Continuous duty/40°C
H/125°K
3 ph.
Phase
Y
380V
416V
∆*
220V
240V
1860
1488
2050
1640
2200
1760
2360
1888
2500
2000
2030
1624
2240
1792
2400
1920
2575
2060
2713
2170
LSA 51.2 S55
kVA
kW
LSA 51.2 M60 kVA
kW
LSA 51.2 L70
kVA
kW
LSA 51.2 VL90 kVA
kW
LSA 51.2 VL95 kVA
kW
Continuous duty/40°C
F/105°K
440V
2150
1720
2375
1900
2545
2036
2730
2184
2870
2296
Stand-by/40°C
H/150°K
3 ph.
480V
2235
1788
2460
1968
2640
2112
2835
2268
3000
2400
380V
416V
220V
240V
1695
1356
1870
1496
2005
1604
2150
1720
2280
1824
1850
1480
2045
1636
2190
1752
2350
1880
2474
1979
440V
1960
1568
2165
1732
2320
1856
2490
1992
2617
2093
Stand-by/27°C
H/163°K
3 ph.
480V
2035
1628
2250
1800
2410
1928
2583
2066
2736
2189
380V
416V
220V
240V
1955
1564
2155
1724
2330
1864
2500
2000
2650
2120
2150
1720
2375
1900
2545
2036
2730
2184
2876
2300
440V
2280
1824
2520
2016
2700
2160
2895
2316
3042
2433
3 ph.
480V
2365
1892
2608
2086
2800
2240
3000
2400
3180
2544
380V
416V
220V
240V
2045
1636
2255
1804
2420
1936
2595
2076
2750
2200
2235
1788
2465
1972
2640
2112
2835
2268
2984
2387
440V
480V
2365
1892
2615
2092
2800
2240
3005
2404
3157
2525
2455
1964
2705
2164
2905
2324
3115
2492
3300
2640
∆* : Consult factory
Ref : 4164 en
3
Low Voltage alternators 4 pole 3-phase
LSA 51.2
1860 to 2500 kVA - 50 Hz / 2235 to 3000 kVA - 60 Hz
Efficiencies 50 Hz (— P.F.: 0.8) (...... P.F.: 1 )
LSA 51.2 S55
98%
97.2
97
97
96
95.5
95
94
0
1000
1500
2000
2500 kVA
97.3
97.1
97.1
96.3
96.2
95.6
95
95.5
500
1000
1500
2000
500
1000
97.3
94
1500
2000
2500
3000 kVA
97.6
97.5
97.5
96.7
96.6
96.4
96.3
95.7
95.3
95
2500 kVA
96.4
LSA 51.2 VL95
96
95.1
0
0
97
95.7
96.5
95
98%
97
96
94
96.7
95.4
95
LSA 51.2 M60
97
0
500
1000
1500
2000
2500
3000 kVA
LSA 51.2 L70
98%
97.4
97.4
97.1
97
97.3
96.5
96.4
96
96.1
95.5
95
94
95.4
97.6
97.5
96.5
96
96.1
95.6
500
97.5
97.2
97
97
95
98%
94
97.1
96.2
LSA 51.2 VL90
98%
96
95.1
0
500
1000
1500
2000
2500 kVA
Reactances (%). Time constants (ms) - Class H / 400 V
Kcc
Xd
Xq
T’do
X’d
T’d
X”d
T”d
X”q
Xo
X2
Ta
Short-circuit ratio
Direct-axis synchro. reactance unsaturated
Quadrature-axis synchro. reactance unsaturated
No-load transient time constant
Direct-axis transient reactance saturated
Short-circuit transient time constant
Direct-axis subtransient reactance saturated
Subtransient time constant
Quadrature-axis subtransient reactance saturated
Zero sequence reactance unsaturated
Negative sequence reactance saturated
Armature time constant
S55
0.33
367
220
2950
28.4
268
14.8
22
18.4
2.6
16.7
39
M60
0.36
350
210
3080
26.9
278
13.9
23
17.5
2.5
15.7
41
L70
0.39
321
193
3230
24.4
288
12.7
24
15.9
2.2
14.3
45
VL90
0.44
287
172
3390
21.4
298
11.1
26
13.9
2.0
12.5
49
VL95
0.39
311
187
3410
23.1
299
12.1
26
15.0
2.1
13.6
49
1.3
5.5
58
700
3720
13.1
15300
68000
1.4
5.4
57
700
4100
12.5
16600
73000
1.4
5.0
53
700
4320
11.4
18200
71000
1.4
4.6
49
700
4500
10.2
20400
68000
1.3
4.7
50
700
5000
10.9
19300
75000
Other class H/400 V data
io (A)
ic (A)
uc (V)
ms
kVA
%
W
W
4
No-load excitation current
On-load excitation current
On-load excitation voltage
Response time (∆U = 20% transient)
Start (∆U = 20% cont. or 50% trans.)
Transient ∆U (on-load 4/4) - P.F.: 0.8 LAG
No-load losses
Heat dissipation
Ref : 4164 en
Low Voltage alternators 4 pole 3-phase
LSA 51.2
1860 to 2500 kVA - 50 Hz / 2235 to 3000 kVA - 60 Hz
Transient voltage variation 400V - 50 Hz
Load application ( AREP or PMG system)
25 %
S 55
M 60
% Voltage dip
20
L 70
VL95
15
VL90
10
5
0
0
500
1000
1500
2000
2500
3000
3500
4000 kVA
kVA at 0.8 power factor
Load rejection (AREP or PMG system)
25%
S 55
M 60
L 70
% Voltage rise
20
VL95
VL90
15
10
5
0
0
500
1000
1500
2000
2500
3000 kVA
kVA at 0.8 power factor
Motor starting (AREP or PMG system)
S 55
30%
L 70
25
% Voltage dip
M 60
VL95
VL90
20
15
13%
10
5
0
0
500
1000
1500
2000 2290 2500
3000
3500
4000
4500 kVA
Locked rotor
1) For a starting P.F. other than 0.6 , the starting kVA must be multiplied by K = Sine φ /0.8
Calculation example for a different P.F. : Starter motor kVA calculated at 0.4 P.F. = 2000 kVA
Sin φ 0.4 = 0.9165
K = 1.145
kVA corrected = 2290 kVA
Voltage dip corresponding to VL90 = 13 %.
2) For voltages other than 400V (Y) , 230V ( ) at 50 Hz, then kVA must be multiplied by (400/U)2 or (230/U)2.
Ref : 4164 en
5
Low Voltage alternators 4 pole 3-phase
LSA 51.2
1860 to 2500 kVA - 50 Hz / 2235 to 3000 kVA - 60 Hz
Efficiencies 50 Hz (— P.F.: 0.8) (...... P.F.: 1 )
LSA 51.2 S55
%
97
94
95.5
500
1000
1500
2000
2500
3000 kVA
LSA 51.2 M60
96.8
94
95.6
1000
1000
1500
2000
2500
1500
2000
2500
97.3
97.2
3000 kVA
97.3
96.6
96.4
96
96.3
96.2
95
95.4
93.7
500
500
LSA 51.2 VL95
94.4
94
94.1
0
0
96
95.6
95
94
93.7
96.8
95.8
96.2
96.3
96.3
%
97
96.9
96.3
96
93
97.3
95.9
95
93.6
97.3
96.5
94
%
97
3000 kVA
93
94
0
500
1000
1500
2000
2500
3000 kVA
LSA 51.2 L70
%
97
97.1
97
97.1
96.4
96
95.8
95
94
93
95.4
94
0
97.1
96
95.8
95.6
95
93
96.8
96.3
96
93
96.8
96.8
LSA 51.2 VL90
%
97
96.1
96
95.9
94.1
93.7
0
500
1000
1500
2000
2500
3000 kVA
Reactances (%). Time constants (ms) - Class H / 480 V
Kcc
Xd
Xq
T’do
X’d
T’d
X”d
T”d
X”q
Xo
X2
Ta
Short-circuit ratio
Direct-axis synchro. reactance unsaturated
Quadrature-axis synchro. reactance unsaturated
No-load transient time constant
Direct-axis transient reactance saturated
Short-circuit transient time constant
Direct-axis subtransient reactance saturated
Subtransient time constant
Quadrature-axis subtransient reactance saturated
Zero sequence reactance unsaturated
Negative sequence reactance saturated
Armature time constant
S55
0.33
368
221
2950
28.4
268
14.8
22
18.5
2.6
16.7
39
M60
0.36
350
210
3080
26.9
278
13.9
23
17.5
2.5
15.7
41
L70
0.39
321
193
3230
24.4
288
12.7
24
15.9
2.2
14.3
45
VL90
0.44
287
172
3390
21.4
298
11.1
26
13.9
2.0
12.6
49
VL95
0.39
311
187
3410
23.1
299
12.1
26
15.0
2.1
13.6
49
1.3
5.5
59
700
4460
13.1
27100
83000
1.4
5.4
57
700
4920
12.5
28800
91000
1.4
5.0
53
700
5180
11.4
31100
89000
1.4
4.6
49
700
5400
10.2
34200
87000
1.3
4.7
50
700
6000
10.9
32000
92000
Other class H/480 V data
io (A)
ic (A)
uc (V)
ms
kVA
%
W
W
6
No-load excitation current
On-load excitation current
On-load excitation voltage
Response time (∆U = 20% transient)
Start (∆U = 20% cont. or 50% trans.)
Transient ∆U (on-load 4/4) - P.F.: 0.8 LAG
No-load losses
Heat dissipation
Ref : 4164 en
Low Voltage alternators 4 pole 3-phase
LSA 51.2
1860 to 2500 kVA - 50 Hz / 2235 to 3000 kVA - 60 Hz
Transient voltage variation 480V - 60 Hz
25 %
Load application ( AREP or PMG system)
S 55
M 60
20
% Voltage dip
L 70
VL95
15
VL90
10
5
0
0
500
1000
1500
2000
2500
kVA at 0.8 power factor
3000
3500
Load rejection (AREP or PMG system)
25%
4000
4500kVA
M 60
S 55
L 70
% Voltage rise
20
VL95
VL90
15
10
5
0
0
30%
500
1000
1500
2000
kVA at 0.8 power factor
2500
3000
Motor starting (AREP or PMG system)
S 55
M 60
L 70
25
% Voltage dip
3500 kVA
VL95
VL90
20
15
11%
10
5
2290
0
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500kVA
Locked rotor
1) For a starting P.F. other than 0.6, the starting kVA must be multiplied by K = Sine φ /0.8
Calculation example for a different P.F. : Starter motor kVA calculated at 0.4 P.F. = 2000 kVA
Sin φ 0.4 = 0,9165
K = 1.145
kVA corrected = 2290 kVA
Voltage dip corresponding to VL90 = 11 %.
2) For voltages other than 480V (Y), 277V ( ), 240V (YY) at 60 Hz ,
then kVA must be multiplied by (480/U) 2 or (277/U) 2 or (240/U) 2.
Ref : 4164 en
7
Low Voltage alternators 4 pole 3-phase
LSA 51.2
1860 to 2500 kVA - 50 Hz / 2235 to 3000 kVA - 60 Hz
3-phase short-circuit curves at no load and rated speed (star connection Y)
100000
LSA 51.2 S55
Symmetrical
Asymmetrical
Current (A)
10000
1000
100
1
10
100
1000
10000
100000
time (ms)
100000
Symmetrical
Asymmetrical
LSA 51.2 M60
Current (A)
10000
1000
100
1
10
100
1000
10000
100000
time (ms)
100000
Symmetrical
Asymmetrical
LSA 51.2 L70
Current (A)
10000
1000
100
1
10
100
1000
10000
100000
time (ms)
Influence due to connection
Curves shown are for star (Y) connection.
For other connections, use the following multiplication factors:
- Series delta : current value x 1.732 - Parallel star : current value x 2
8
Ref : 4164 en
Low Voltage alternators 4 pole 3-phase
LSA 51.2
1860 to 2500 kVA - 50 Hz / 2235 to 3000 kVA - 60 Hz
3-phase short-circuit curves at no load and rated speed (star connection Y)
100000
Symmetrical
Asymmetrical
Current (A)
LSA 51.2 VL90
10000
1000
100
1
10
100
1000
10000
100000
time (ms)
100000
Current (A)
LSA 51.2 VL95
Symmetrical
Asymmetrical
10000
1000
100
1
10
100
1000
10000
100000
time (ms)
Influence due to short-circuit
Curves are based on a three-phase
short-circuit.
For other types of short-circuit,
use the following multiplication factors.
3-phase
2-phase L/L
1-phase L/N
Instantaneous (max.)
1
0.87
1.3
Continuous
1
1.5
2.2
5 sec.
2 sec.
Maximum duration (AREP/PMG) 10 sec.
Ref : 4164 en
9
Low Voltage alternators 4 pole 3-phase
LSA 51.2
1860 to 2500 kVA - 50 Hz / 2235 to 3000 kVA - 60 Hz
Single bearing dimensions
S DIA,XBG Eq. Sp. holes on M P.C.D.
LB
AIR OUTLET
7
220
150 204
B
60
4 holes Ø 33
1395
YDIA, X Eq. Sp.
holes on U P.C.D.
0
AIR INLET
140
140
610
750
80
4 holes Ø 14,5
4 holes Ø M24
895
Cables
Ø 910
Ø 975
220
150
260
Option
PMG Option
+118
Ø BX f 7
ØN f8
Option
Xg
12
1082
ß
35
V
AH
Ø 998
676
80
910
40
60
Dimensions (mm) and weight
Type
L without PMG
LB
B
V
Xg
Weight (kg)
Coupling
Flex plate
LSA 51.2 S55
1699
1677
900
744
735
3745
Flange S.A.E 24
LSA 51.2 M60
1799
1777
1000
844
770
4040
Flange S.A.E 21
LSA 51.2 L70
1899
1877
1100
944
825
4445
Flange S.A.E 18
LSA 51.2 VL90
1999
1977
1200
1044
885
4995
LSA 51.2 VL95
1999
1977
1200
1044
890
5065
M
XBG
S
β°
Flange (mm)
S.A.E.
N
500 -1
L
0
00
X
X
X
X
Flex plate (mm)
S.A.E.
BX
U
X
Y
AH
0
647.7
679.5
16
14
11°15’
24
733.4
692.1
12
21
0
00
787.4
850.9
16
14
11° 15’
21
673.1
641.3
12
18
0
18
571.5
542.9
6
18
15.8
Lr
Ø 140
Ø 170
Ø 220
Ø 240
Ø 225
Xr
Torsional analysis data
Centre of gravity: Xr (mm), Rotor length: Lr (mm), Weight: M (kg), Moment of inertia: J (kgm2): (4J = MD2)
Type
Xr
Flex plate S.A.E. 18
Lr
M
J
Xr
Flex plate S.A.E. 21
Lr
M
J
Xr
Flex plate S.A.E. 24
Lr
M
J
LSA 51.2 S55
661
1555.5
1357
41.1
643
1555.5
1359
41.9
640
1555.5
1365
42.6
LSA 51.2 M60
703
1655.5
1475
44.8
685
1655.5
1479
45.6
682
1655.5
1483
46.3
LSA 51.2 L70
754
1755.5
1630
50
736
1755.5
1632
50.8
734
1755.5
1638
51.6
LSA 51.2 VL90
819
1855.5
1833
57.2
801
1855.5
1835
58
799
1855.5
1841
58.8
LSA 51.2 VL95
821
1855.5
1854
63.7
805
1855.5
1854
64.4
802
1855.5
1860
65.2
NOTE : Dimensions are for information only and may be subject to modifications. Contractuel 2D drawings can be downloaded from the LeroySomer site, 3D drawing files are available upon request.
10
Ref : 4164 en
Low Voltage alternators 4 pole 3-phase
LSA 51.2
1860 to 2500 kVA - 50 Hz / 2235 to 3000 kVA - 60 Hz
Two bearing dimensions
M12 DIA, 16 Eq. Sp. on Ø 850,9
L
LB
11° 15’
Option
Xg
895
PMG option
+118
Câbles
35
138
0
36
1395
20
Ø 910
Ø 975
Ø 150 m6
Ø 787,4
Ø 975
f8
M30
AIR OUTLET
7
220
150
260
220
150 204
B
60
4 holes Ø 33
AIR INLET
140
4 holes Ø 14,5
4 holes Ø M24
610
140
750
80
500 -1
250
1082
676
V
80
910
40
60
Dimensions (mm) and weight
Type
L without PMG
LB
B
V
Xg
LSA 51.2 S55
1905
1655
900
744
735
3725
LSA 51.2 M60
2005
1755
1000
844
770
4020
LSA 51.2 L70
2105
1855
1100
944
825
4425
LSA 51.2 VL90
2205
1955
1200
1044
885
4975
LSA 51.2 VL95
2205
1955
1200
1044
890
5045
Weight (kg)
Xr
Ø 140
Ø 170
Ø 225
Ø 240
Ø 182
Ø 160
Ø 150
315
Lr
Torsional analysis data
Centre of gravity: Xr (mm), Rotor length: Lr (mm), Weight: M (kg), Moment of inertia: J (kgm2): (4J = MD2)
Type
Xr
Lr
M
J
LSA 51.2 S55
610.8
1783.5
1289
40
LSA 51.2 M60
652.6
1883.5
1406
43.8
LSA 51.2 L70
703.7
1983.5
1561
49
LSA 51.2 VL90
767.5
2083.5
1763
56.3
LSA 51.2 VL95
793.2
2083.5
1789
61.7
NOTE : Dimensions are for information only and may be subject to modifications. Contractuel 2D drawings can be downloaded from the LeroySomer site, 3D drawing files are available upon request.
Ref : 4164 en
11
Contact
en - 2013.10 / a
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The descriptions cannot in any way be considered contractual.
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