ANGOULÊME, France, 15 July 2021: Nidec Leroy-Somer has launched the LSA 47.3 industrial alternator, which the company said offers increased efficiency and starting kVA over its predecessor, and also benefits from the implementation of the latest technologies it has developed.

Making the announcement through a Press release, Nidec Leroy-Somer said the LSA 47.3 delivers a rated power between 410 and 660 kVA at 50 Hz (495 to 825 kVA at 60 Hz). The 660 kVA rating (825 kVA at 60 Hz) was previously held by the LSA 49.3. Thanks to the cooling circuit optimization, the LSA 47.3 is now able to reach this power node for prime and demanding applications, the company claimed. This is a significant benefit for generator set manufacturers, as the same power is made available through a more compact machine, it added.

The LSA 47.3 alternator features a SHUNT excitation system with a R250 regulator as standard, the company said. An AREP auxiliary winding excitation system with D350 digital regulator version is also available to improve transient performances and provide high overload capacities, it said. A D550 digital regulator can also be used for grid connected applications, it said. A Permanent Magnet Generator (PMG) excitation system is also available as an option, it added.

According to Nidec Leroy-Somer, the LSA 47.3 is fully interchangeable with the LSA 47.2 (shaft height and feet configuration), and can, therefore, be coupled with all diesel engines on the market for this power range.

According to the company, the LSA 47.3 offers the following power nodes:

• 410, 455, 500, 550, 600, 660 kVA at 50Hz
• 510, 570, 625, 690, 750, 825 kVA at 60Hz

The alternator, Nidec Leroy-Somer said, is optimised for prime and demanding applications, such as marine and cogeneration. It offers an efficiency of up to 95.7% at cos φ 0.8, which ranks it among the best in the category, the company claimed.

“The LSA 47.3 is an important step forward in our strategy to optimise our product range,” said Wenbin Ding, Product Manager (Low-voltage Range), at the company. “The benefits of this new product are significative, with real improvements where it matters most: Efficiency, power and starting kVA. In addition, the optimized cooling system we implemented means that hot spots are reduced inside the machine. Ultimately, this means a better reliability and longer lifetime, which is essential for the applications all LSA alternators are built to support.”

With the introduction of the LSA 47.3, the company said, the LSA 47.2 will soon be retired from the market, as will be the LSA 49.3 S4 (660 kVA).