LSA 40 – LSA 47.3 low-voltage synchronous generators for generator sets, 10–660 kVA

LSA 40 – LSA 47.3 low-voltage synchronous generators for generator sets, 10–660 kVA

Country: France · Model: LSA 40 – LSA 47.3

The LSA series of 10–660 kVA, five low-voltage frame sizes from LSA 40 to LSA 47.3 for diesel and gas generator sets. Four-pole machines at 1500–1800 rpm and 220–480 V, shaft height 160–355 mm, efficiency up to 96.9%. They are designed for harsh conditions, parallel operation with the grid and marine installations.

Frame sizes: LSA 40 (10–20 kVA), 42.3 (25–63), 44.3 (70–200), 46.3 (230–365), 47.3 (410–660 kVA)
Voltage: 220–480 V
Poles / speed: 4 poles, 1500–1800 rpm
Shaft height: 160–355 mm

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Technical specifications

Frame sizes	LSA 40 (10–20 kVA), 42.3 (25–63), 44.3 (70–200), 46.3 (230–365), 47.3 (410–660 kVA)
Voltage	220–480 V
Poles / speed	4 poles, 1500–1800 rpm
Shaft height	160–355 mm
Max. efficiency	91.3% (LSA 40) – 96.9% (LSA 47.3)
Excitation	SHUNT, AREP, PMG
Regulators	R220 / R250 (analog), D350 / D550 (digital)
Regulation accuracy	±0.5% (SHUNT), ±0.25% (AREP)
Short-circuit current	300% of rated, 10 s (AREP/PMG)
Insulation / protection	class H, IP23 (IP44 with filters)
Overspeed	2250 rpm

Specifications are taken from the manufacturer’s technical documentation. Updated 11/06/2026.

Description

By output (kVA at 50 Hz, kW at 60 Hz, continuous duty at 40 °C), LSA 40 gives 10–20 kVA (shaft 160 mm, efficiency up to 91.3%), LSA 42.3 (25–63 kVA, 180 mm, up to 94.1%), LSA 44.3 (70–200 kVA, 270 mm, up to 95.7%), LSA 46.3 (230–365 kVA, 280 mm, up to 95.9%), LSA 47.3 (410–660 kVA, 355 mm, up to 96.9%). Insulation is class H, winding pitch 2/3, 12 leads (6 optional in LSA 47.3), protection IP23, installation altitude up to 1000 m, overspeed 2250 rpm. SHUNT excitation with analog regulators R220 and R250 holds voltage within ±0.5%, and AREP or PMG with the digital D350 and D550 give ±0.25%. A generator with AREP or PMG withstands 300% of rated short-circuit current for 10 s. The D550 adds parallel operation with the grid, and the D350 and D550 add three-phase measurement, a data log and remote communication. Available are SAE flanges, flexible discs, single- and two-bearing versions, winding protection for aggressive environments and humidity above 95%, and the R791 radio interference kit (standard for Europe).

How to choose

Choose the frame size by power and shaft height, and the excitation by the short-circuit and parallel operation requirements. For single-phase machines of 3.5–40 kVA look at LSAP, for typical gensets without complex configuration TAL 040 – TAL 049 for 10–1000 kVA, for the enclosed version for 435–800 kVA LSA 49.3 IC6 / IC8.

Request a price and lead time

LSA 40 – LSA 47.3 low-voltage synchronous generators for generator sets, 10–660 kVA. We reply within one business day.

Or email office@usk.ua or call +38 (044) 339-50-20.

FAQ

What is the efficiency of LSA 40 – LSA 47.3 generators?

From 91.3% in LSA 40 to 96.9% in LSA 47.3. The intermediate frame sizes give 94.1%, 95.7% and 95.9%.

How do AREP and PMG differ from SHUNT?

SHUNT works with analog R220 or R250 and gives ±0.5%; AREP and PMG with digital D350 and D550 give ±0.25% and a short-circuit current of 300% for 10 s.

By how much does power drop with air filters?

Filters on the air inlet reduce power by 5%, and the IP44 version with filters on the inlet and outlet by 10%.

What shaft height do the frame sizes of the series have?

160 mm in LSA 40, 180 mm in LSA 42.3, 270 mm in LSA 44.3, 280 mm in LSA 46.3 and 355 mm in LSA 47.3.