Premium Efficiency - IE3

Standard IEC 60034-30 defines the energy efficiency classes for asynchronous motors. Regulations (EC) 640/2009 and 04/2014 establish the conditions for the conversion to the new energy-efficient technology.

IE2 has been in place as the minimum efficiency since 2011. The second stage is  now taking effect since January 1, 2017. Only motors in the power range from 7.5 to 375 kW complying with Energy Efficiency Class IE3 are permitted for line operation in the European Economic Area from that date. This is a legal requirement. January 1, 2017, saw the expansion of statutory provisions on motor efficiency.

Since this date, the energy efficiency class IE3 has been mandated for motors with power ratings from 0.75 to 7.5 kW, with laws now covering all motors ranging from 0.75 to 375 kW.

The most important facts about IE3

  • In 2011, the use of IE2 motors was prescribed by law
  • Since 1 January 2015 on, energy efficiency class IE3 will be mandatory for motors from 7.5 kW to 375 kW
  • Since 1 January 2017 on, energy efficiency class IE3 will apply to motors from 0,75 kW to 375 kW


For electric single speed, three-phase 50 or 50/60 Hz squirrel cage induction motor

  • Rated voltage up to 1,000 V;
  • Rated power: 0.75 - 375 kW;
  • Number of poles: 2, 4, or 6;
  • Rated on the basis of continuous duty operation;



  • Motors completely immersed in a liquid during operation;
  • Motors that are fully integrated into a machine;
  • Brake motors;
  • other motor types;

Alternative: IE2 motor in combination with frequency converter

IE2 motors will still be permitted in conjunction with frequency converter operation, although the motor starter is always the better alternative at full speed.


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