The IE4 Super Premium class, defined in the IEC 60034-30-1 standard, is a high-level efficiency tier that markedly reduces energy losses compared with an IE3 motor of the same rating. Efficient IE4 motors have a direct effect on the electricity bill in systems that run without interruption.

How IE4 Efficiency Is Achieved

Reaching the IE4 level calls for more high-grade copper winding, a low-loss silicon steel core and an optimised rotor design. Together these improvements cut copper, iron and friction losses, allowing the motor to deliver the same mechanical output from less electrical input.

Running Hours and Savings

The benefit of a higher efficiency class is proportional to the number of hours the motor runs each year. On pumps, fans and compressors that turn for long shifts, the few extra efficiency points of the IE4 class translate into a clearly visible reduction in annual consumption.

Where IE4 Makes Sense

IE4 motors are most worthwhile in plants that operate under continuous load with high yearly running hours. Water and wastewater pumps, ventilation fans, cooling systems and process lines are the applications that gain the most from this class.

Switching to IE4 with DRG

DRG Motor supplies IE4 motors suited to a 400 V / 50 Hz supply, with IP55 protection and Class F insulation, across various pole and power ratings. Tell us the rating, speed and mounting of your current motor and we will propose a suitable IE4 equivalent and a current quotation.