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Siemens 1LG6 207–2AA..

Series: 1LG6

The photo shows the 1LG6228-2AA96-Z+T22 from the same series. Source: mall.siemens.com.cn

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The Siemens 1LG6 207–2AA.. is a three-phase induction motor from the 1LG6 series. The rated output is 37 kW. The motor is two-pole, which at 50 Hz gives a synchronous speed of 3,000 rpm. The rated voltage is 415 V. The housing is frame size 200 L in foot-mounted form. The protection class is IP55. The efficiency is 94.1 per cent at full load and 94 per cent at 75 per cent load. The motor weighs 255 kg. At full load it delivers 119 Nm. Stated countries of manufacture: Czechia and Germany. The data is based on the Australian MEPS registration under standard AS/NZS 1359.5:2004; measured to IEC 60034-2-1 (Edition 2.0). The 1LG6 series covers 90 models. Rated output within it ranges from 11 to 200 kW; the 1LG6 207–2AA.. sits at the bottom of that range with 37 kW. Its immediate neighbours are the 1LG6 253–8AB60 below it with 30 kW and the 1LG6 223–2AA.. above it with 45 kW. 569 Siemens models across 4 series are on record.

Siemens 1LG6 – cast-iron motors in frame sizes 180 to 315: 11 to 200 kW, the type code 1LG6 xxx-xAAxx explained

1LG6 is Siemens' classic cast-iron series for the medium and large IEC frame sizes – the motor that was the standard solution in cooling towers, pumping stations, cement mills and rolling mills for decades before the 1LE1 and Simotics SD ranges replaced it. The Siemens type code is an order number: 1LG stands for the cast-iron family, the 6 for the generation, the three-digit number encodes frame size and frame length (183 = frame 180 short, 186 long, 206/207 = 200, 220/223 = 225, 253/258 = 250, 283/288 = 280, 310/313/316 = 315), the digit after the hyphen the number of poles (2, 4, 6, 8) and the letters AA or AB the winding and voltage execution; the last positions define mounting and options and are left as dots in many registrations.

Read on 3 more paragraphs

The register lists 90 versions from frame size 180 to 315 with 11 to 200 kW, two- to eight-pole, rated voltage 400 to 415 V. Full-load efficiencies lie between 88.7 and 96.5 %, protection is IP55 throughout, mounting in almost all cases IM B3 (foot) or IM B5 (flange). Recorded weights run from 155 to 1,245 kg – an eight-pole 315 is a machine set in place by crane. Czechia (Mohelnice/Frenštát plants) and Germany are recorded as manufacturing locations.

The series stands for the time before the IE3 mandate: many 1LG6 are classified IE1 or IE2 but keep running thanks to their robust design – cast iron, generous bearings, regreasing facility from frame 225 upward.

When replacing: shaft height, shaft end and flange are compatible with any make under IEC 60072; an IE3 successor of the same frame size quickly recoups its price on continuous-duty machines but may bring a slightly higher starting current that contactor and protection must tolerate.

Sources: SpecCodex register, model data: Siemens 1LG6 (MEPS-Registrierungen), Siemens Niederspannungsmotoren (manufacturer)

Technical data

Engine

Rated output37 kWcorrect

Dimensions and weights

Weight255 kgcorrect

Electrical data

Rated voltage415 Vcorrect
Number of poles2correct
Protection classIP55correct
Frame size200 L (foot)correct
Mounting (IEC 60034-7)MB3, IMB5correct
Efficiency at full load94.1 %correct
Efficiency at 75 % load94 %correct

Origin and approval

Country of manufactureCzechia, Germanycorrect

Other data

Standard appliedAS/NZS 1359.5:2004correct
Test methodIEC 60034-2-1 (Edition 2.0)correct

Frequently asked questions

How much power does the Siemens 1LG6 207–2AA.. have?

The Siemens 1LG6 207–2AA.. delivers 37 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

1 LG6 253-2

1 LG6 258-2

1 LG6 259-2

1LG6 183–2AA..

1LG6 183–2AA60

1LG6 183–4AA..

1LG6 183–4AA60

1LG6 186–4AA..

1LG6 186–4AA60

1LG6 186–6AA..

1LG6 186–6AA60

1LG6 186–8AB..

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

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