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Leroy Somer FLSES250M

Series: FLSES

The photo shows the FLSES160MB from the same series. Source: rinas.lv

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The Leroy Somer FLSES250M is a three-phase induction motor built by Leroy Somer. The rated output is 55 kW. The motor is four-pole, which at 50 Hz gives a synchronous speed of 1,500 rpm. The rated voltage is 400 V. The housing is frame size 250 M in foot-mounted form. The protection class is IP55. The efficiency is 94.5 per cent at full load, 94.8 per cent at 75 per cent load and 94 per cent at half load. Mounting arrangements to IEC 60034-7: B3 and B35. The motor is built in China. The figures come from the Australian MEPS register under the GEMS Determination 2012; measured to AS/NZS 1359.102.3:2000. Rated output across the Leroy Somer range ranges from 0.75 to 160 kW; the FLSES250M sits in the lower part of that range with 55 kW. Its immediate neighbours are the M400365 below it with 45 kW and the FLSES280S above it with 75 kW. 103 Leroy Somer models are on record.

Leroy Somer – FLSES series at a glance

The FLSES series from Leroy Somer comprises 12 models in the register, in the Electric motors group. Rated power ranges from 11 to 75 kW. Listed in the register: FLSES160L, FLSES160M, FLSES160MA, FLSES160MB.

Sources: SpecCodex-Register (eigene Daten)

Technical data

Engine

Rated output55 kWcorrect

Electrical data

Rated voltage400 Vcorrect
Number of poles4correct
Protection classIP55correct
Frame size250 M (foot)correct
Mounting (IEC 60034-7)B3, B35correct
Efficiency at full load94.48 %correct
Efficiency at 75 % load94.76 %correct
Efficiency at half load93.97 %correct

Origin and approval

Country of manufactureChinacorrect

Other data

Standard appliedGreenhouse and Energy Minimum Standards (Three Phase Electric Motors) Determination 2012correct
Test methodAS/NZS 1359.102.3:2000correct

Frequently asked questions

How much power does the Leroy Somer FLSES250M have?

The Leroy Somer FLSES250M delivers 55 kW.

What to check before buying

  • Match the data plate against the order: frame size, mounting and rating have to agree.
  • Check the ingress rating against the installation site — outdoors or in dust the demands differ.
  • Hold the mounting form and dimensions against the existing seat before ordering.
  • The pole count sets the speed — when replacing an older unit, compare this first.
  • For used units, ask about winding condition and bearing play.
  • Ask about parts availability for this series — the running costs hang on it.

A general list for this type of machine — no substitute for an inspection or an appraiser.

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This page carries 22 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.

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Other models in this series

FLSES160L

FLSES160M

FLSES160MA

FLSES160MB

FLSES180L

FLSES180MR

FLSES200L

FLSES200LA

FLSES225M

FLSES225ST

FLSES280S

Sources: Energy Rating — Australian government equipment register (retrieved August 2026) · How we check the data

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