An IE4 motor corresponds to the Super Premium efficiency class under IEC 60034-30-1 and noticeably cuts losses compared with an IE3 motor of the same rating. As the efficiency class rises, the motor draws less electrical energy from the grid for every kilowatt of mechanical output it delivers, and IE4 is one of the highest practical steps in this chain.

What Sets IE4 Apart

IEC 60034-30-1 classifies efficiency as IE1 (Standard), IE2 (High), IE3 (Premium), IE4 (Super Premium) and IE5 (Ultra Premium). Compared with an IE3 motor of the same kW and speed, IE4 uses more active material, an optimised lamination stack and higher-grade windings to reduce copper and iron losses. The result is less heating and lower operating current.

When the Class Pays Off

The longer a motor runs each year, the faster the IE4 efficiency gap returns its value. On multi-shift production lines, continuously running pump and fan groups and compressors operating under S1 continuous duty, an IE4 motor saves far more energy over its life than the difference in purchase price.

Specification and Construction

IE4 motors are typically supplied at 400 V / 50 Hz with Class F insulation and IP55 protection. The 2-, 4- and 6-pole options correspond to 3000, 1500 and 1000 rpm synchronous speeds. A cast iron frame is preferred for heavy applications that need both high efficiency and mechanical strength.

DRG Motor IE4 Solutions

DRG Motor, a supplier based in Izmir, offers IE4 class motors across a range of powers and speeds. We assess your load profile and operating hours to help you decide correctly between IE3 and IE4.