Electric motors: New efficiency classes

Comprehensive legislation has been passed in the European Union with the objective to reduce the energy consumption and therefore CO2 emissions. EU Regulation No 640/2009 (passed 07/2009) does apply to all EU countries. IEC 60034-30 is the basis for determining the losses and therefore the efficiency.

EU Regulation is becoming effective on 16.06.2011. This means that manufacturers may no longer market IE1 motors in the European Economic Area but motors produced before that date can be sold or installed by any manufacturer.

New nomenclature

The standard IEC 60034-30 defines efficiency classes for 50 and 60 Hz and stipulates, worldwide, which motors are involved and which exceptions apply. The EU Regulation is essentially based on this standard.

New efficiency classes have been defined in IEC 60034-30 for induction motors (IE = International Efficiency):


  • IE1: Standard Efficiency (comparable to eff2)
  • IE2: High Efficiency (comparable to eff1 or EPAct’92)
  • IE3: Premium Efficiency (comparable to EPAct’05)

Electric motors: New efficiency classes
Electric motors: New efficiency classes

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