This IEC standard provides for the global harmonization of energy-efficiency classes of
electric motors. It deals with all kinds of electric motors that are rated for line operation
(including starting at reduced voltage). This includes all single- and three-phase low voltage
induction motors, regardless of their rated voltage and frequency, as well as line-start
permanent-magnet motors.
A second part of this standard series (IEC 60034-30-2) will be prepared for motors rated for
variable voltage and frequency supply, such as synchronous motors. The second part will also
provide for harmonic voltage losses in motors capable of line operation when fed by
frequency converters.
IEC 60034-30-1 widens the product range covered in the first edition of IEC 60034-30
significantly. The power range has been expanded (starting at 0,12 kW and ending at 1 000
kW). All technical constructions of electric motors are covered as long as they are rated for
on-line operation and not just three-phase, cage-induction motors as in the first edition.
The IE4 class is newly included in this standard. The informative definition of IE4, which was
previously included in IEC/TS 60034-31:2010, is therefore outdated.