IE3 and IE4 efficiency class motors are the two main efficiency-focused tiers of the DRG product range. Which one suits a plant depends on running hours and load profile. DRG Motor offers a wide choice of power and speed in both classes, giving businesses the means to make the right decision.

What IE3 Premium Offers

Under IEC 60034-30-1, IE3 defines the Premium efficiency class. This class delivers a balanced efficiency-cost relationship over medium and long running hours. In common applications such as general drive, pumps, fans and conveyors, IE3 motors strike a reasonable balance between initial investment and energy savings.

The IE4 Super Premium Advantage

IE4 Super Premium runs with lower losses than IE3. In plants that run long hours, often without interruption, the extra IE4 efficiency makes a clear difference on the energy bill. For high running-hour applications, IE4 stands out as the choice with a faster payback.

Shared Technical Features

DRG's IE3 and IE4 motors are built from 0.55 to 355 kW with 2/4/6-pole options. A 400 V / 50 Hz supply, Class F insulation, IP55 protection and S1 continuous duty are standard. Mounting options include foot-mounted B3, flange-mounted B5 and face-mounted B14, while the cast iron frame ensures durability in harsh conditions.

DRG Support in Class Selection

The choice between IE3 and IE4 rests on a calculation made with numbers. DRG Motor reviews your running hours and load condition, shows which class pays back sooner for you, and recommends the motor that suits your application.