What is the Leroy Somer LSA40 S4 Alternator?

The Leroy Somer LSA40 S4 is the second biggest alternator from the efficient LSA40 range. Its rigid design means that the compact alternator can withstand vibrations from the generator set making it a long lasting unit. The alternator has been designed so that it can be used for all typical generator applications, including marine, backup and telecommunications.

As standard, the LSA40 S4 has a shunt (self excited) excitation system but it also has an AREP (auxiliary wound) system available as an optional extra.

Where is the Leroy Somer LSA40 S4 Alternator currently manufactured?

The Leroy Somer LSA40 S4 is currently made in the Czech Republic.

Need a generator? Our UK manufactured diesel generators include this alternator.

What is the power rating of the Leroy Somer LSA40 S4 Alternator?

Using this alternator at 50 Hz, will generate a prime power output of 17.5 kVA and a standby power output of 19.5 kVA. The power factor is 0.8.

Where can I find further information on the Leroy Somer LSA40 S4 Alternator?

The material insulation class for the alternator is class H and the IP rating is IP23.

The shaft height of the alternator is 160 mm and the total weight for the single bearing alternator is 92 kg.

The 4 pole alternator has a maximum efficiency of 91.3%.

How is the quality of the Leroy Somer LSA40 S4 Alternator assured? 

The Leroy Somer LSA40 S4 is manufactured and marketed to the ISO 9001 and ISO 14001 certification therefore all aspects of production are maintained to a high standard to ensure a high quality product.