Leroy-Somer LSA Series alternator is designed to be suitable for typical generator applications, such as: backup, marine applications, rental, telecommunications, etc.
For more types, please contact us
Compliant with international standards
The LSA series alternator conforms to the main international standards and regulations:
- IEC 60034, NEMA MG 1.22, ISO 8528/3, CSA, UL 1446, UL 1004B on request, marine regulations, etc.
It can be integrated into a CE marked generator.
The LSA series alternator is designed, manufactured and marketed in an ISO 9001 environment.
Top of the range electrical performance
- Class H insulation.
- Standard 12 wire re-connectable winding, 2/3 pitch, type no. 6.
Voltage range:
- 50 Hz: 220 V - 240 V and 380 V - 415 V (440 V)
- 60 Hz: 208 V - 240 V and 380 V - 480 V
High efficiency and motor starting capacity.
Other voltages are possible with optional adapted windings:
- 50 Hz: 440 V (no. 7), 500 V (no. 9),
- 60 Hz: 380 V and 416 V (no. 8), 600 V (no. 9)
THD Total harmonic distortion < 2% (full load).
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
Excitation system | Regulation options | |||||
Voltage regulator | SHUNT | AREP | Current transformer for paralleling | Mains paralleling | 3-phase sensing | Remote voltage potentionmeter |
R220 | Std | - | - | - | - | - |
R438 | - | Std | C.T.* | R726* | R731* | √ |
D510°C | Option | Option | C.T.* | Included | Included | √ |
√: Possible mounting * External mounting
Protection system suited to the environment
The LSA Series alternator 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 10%.
- Winding protections for harsh environments and relative humidity greater than 95%.
- Space heaters.
- Thermal protection for stator windings.
- Steel terminal box.
Reinforced mechanical structure using finite element modelling
● Compact and rigid assembly to better withstand generator vibrations.
● Two-bearing and single-bearing versions designed to be suitable for commercially-available heat engines.
● Steel frame.
● Aluminium flanges and shields
● Half-key balancing.
● Sealed for life ball bearings.
● Direction of rotation: clockwise and anti-clockwise (without derating).
Accessible terminal box
● Easy access to the AVR and to the connections.
● 8 way terminal block for reconnecting the voltage.
● Predrilled holes for cable gland.
Low Voltage Alternators – 4 Pole
LSA 40 – 10 to 20 KVA -50 Hz / 12.5 to 25 KVA – 60Hz
General Characteristics
Insulation Class | H | Excitation system | SHUNT | AREP | ||||
Winding pitch | 2/3 (Winding 6S) | AVR type | R 220 | R 438 | ||||
Number of wires | 12 | Voltage regulation (*) | ± 1% | ± 0.5% | ||||
Protection | IP 23 | Short-circuit current | - | 300% (3 IN): 10 s | ||||
Altitude | ≤1000 m | Total Harmonic distortion THD (**) in no-load | ＜3% according to IEC | |||||
Overspeed | 2250 min-1 | Total Harmonic distortion THD (**) on linear load | 5% according to IEC | |||||
Air flow | 0.06 m3/s, 50 Hz – 0.072 m3/s, 60 Hz | Waveform: NEMA=TIF (**) | 50 | |||||
(*) Steady-state (**) Total harmonic distortion between phases, in no-load or on linear load. | ||||||||
Leroy-Somer LSA Series low Voltage Alternator – 4 Pole Model & Power Range
LSA 42.3 | 25 KVA to 60KVA – 50 Hz / 31.5 KVA to 75 KVA – 60Hz |
LSA 44.3 | 70 to 165 KVA – 50 Hz / 88 to 206 KVA – 60Hz |
LSA 46.3 | 180 to 365 KVA – 50 Hz / 225 to 456 KVA – 60 Hz |
LSA 47.2 | 365 to 600 KVA – 50 Hz / 456 to 750 KVA – 60 Hz |
LSA 49.3 | 660 KVA – 50 Hz / 825 to 1250 KVA – 60 Hz |
LSA 50.2 | 1250 to 1640 KVA – 50 Hz / 1250 to 2000 KVA – 60 Hz |
LSA 53.2–LSA 54.2 | 400 V – 50 Hz / 480 V – 60 Hz |
For LSA Series alternator detailed technical data, please send us email: sales@dieselgeneratortech.com
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