An IE3 electric motor corresponds to the class defined as "Premium Efficiency" in the IEC 60034-30-1 standard. This class is designed to run with lower losses than a standard motor of the same rating. Below we cover what IE3 means, which techniques deliver this efficiency and where it is used.

What Does the IE3 Class Mean?

IEC 60034-30-1 ranks motors as IE1 (Standard), IE2 (High), IE3 (Premium), IE4 (Super Premium) and IE5 (Ultra Premium). IE3 is now the common baseline class for continuously running industrial drives and noticeably reduces energy losses compared with IE1.

How Is IE3 Efficiency Achieved?

Higher copper fill, quality silicon steel laminations, an optimised air gap and a low-loss rotor design deliver IE3 efficiency. These motors run on a 400 V / 50 Hz supply as 2/4/6-pole units at 3000/1500/1000 rpm and are built with Class F insulation.

Where Are IE3 Motors Used?

IE3 is preferred on drives that turn all year, such as pumps, fans, compressors, conveyors and mixers, because the savings are felt most in these applications. With IP55 protection and a choice of cast iron or aluminium frame, it adapts to different environments.

DRG IE3 Motor Solutions

DRG Motor offers three-phase motors in the IE3 efficiency class from 0.55 to 355 kW. The model is set with foot-mounted B3, flange-mounted B5 and face-mounted B14 options to suit your application. Share your power and speed details and we will define the right IE3 motor together.