IE3 and IE4 are two high-efficiency classes in the DRG Motor product range. Both run with low losses; the right choice depends on the application's running time and energy cost.

IE3 in the DRG Range

IE3 (Premium) is today's industrial standard and is used across a wide range of applications. With balanced price-performance it suits moderately used pump, fan and conveyor applications.

IE4 in the DRG Range

IE4 (Super Premium) runs with fewer losses than IE3. The extra savings it provides in long-running plants cover the initial cost difference in the short to medium term.

IE3 or IE4?

As daily running time grows, IE4 becomes more worthwhile; in less-used applications IE3 is a balanced choice. Both classes are offered from 0.55 to 355 kW with IP55 protection and class F insulation.

DRG Motor for IE3-IE4 Selection

Between IE3 and IE4 the deciding inputs are annual operating hours and start frequency; give us both, the housing size follows.