IE4 efficiency class electric motors represent the Super Premium tier of the IEC 60034-30-1 standard and reach the lowest loss levels among series-produced motors. Designed for plants that run long hours, these motors are the choice of businesses aiming to minimize energy consumption. DRG Motor builds its IE4 series across a wide power range.

What the IE4 Class Means

Efficiency classes rise from IE1 Standard to IE4 Super Premium; each step means lower motor losses at the same load point. IE4 runs with lower copper and iron losses than IE3 Premium. In high running-hour applications this turns into noticeable energy savings.

The Technical Source of Low Loss

IE4 efficiency comes from more copper in the windings, an optimized magnetic lamination stack and low-friction bearing selection. Reduced losses also mean the motor runs cooler, which extends the life of the Class F insulation and brings stability in continuous operation.

Power, Speed and Frame

DRG's IE4 motors are built from 0.55 to 355 kW with 2/4/6-pole options. On a 50 Hz supply they deliver 3000 rpm at 2-pole, 1500 rpm at 4-pole and 1000 rpm at 6-pole. IP55 protection, S1 continuous duty and a cast iron frame ensure long life under heavy industrial conditions.

The Payback Logic of IE4

Although an IE4 motor has a higher purchase price, the savings on the energy bill over long running hours offset that difference in time. DRG Motor reviews your running hours, calculates how soon IE4 pays back for you, and recommends a suitable model.