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  • Leroy-Somer LSA Series Low Voltage Alternator - 4 Pole
Leroy-Somer LSA Series Low Voltage Alternator - 4 Pole

Leroy-Somer LSA Series Low Voltage Alternator - 4 Pole

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.


Leroy-Somer alternator


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.


alternator


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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