1.1.27 What efficiency classes exist for electric motors?

The new standard EN 60034-30:2009 defines the efficiency classes IE1, IE2, IE3, IE4 and IE5 for low-voltage three-phase motors.

IE1 = Standard efficiency
IE2 = High efficiency
IE3 = Premium Efficiency
IE4 = Super-Premium Efficiency
IE5 = Ultra-Premium Efficiency

Some IE5 electric motors with permanent magnet technology are already being offered. However, there is currently no obligation to use these high-priced drives.