IEC 60034-30 specifies energy-efficiency classes for single-speed, continuous duty(S1), three-phase, cage-induction motors with 2, 4 or 6 poles. It classifies three classes: IE1 (standard), IE2 (high) and IE3 (premium). For each class the efficiency is defined for a rated output range from 0.75 to 375 kW. In the European Community the IE2 class is mandatory for all new motors since 16 June 2011. The IE3 class will be mandatory from 1 January 2015 (7.5–375 kW) and 1 January 2017 (0.75–375 kW).
- International Electrotechnical Commission: TC2 rotating machinery work programme homepage
- Commission Regulation (EC) No 640/2009: implementing Directive 2005/32/EC of the European Parliament and of the Council with regard to ecodesign requirements for electric motors, PDF, 22 July 2009