IE3 electric motors built for continuous duty are developed for production lines, pumps and fans expected to run uninterrupted in S1 duty for most of the year. In these applications the motor is chosen on the energy and maintenance cost accumulated over years rather than on the purchase price.

Why IE3 for Continuous Operation?

The IE3 Premium efficiency class runs with markedly lower losses than IE1 and IE2. If a motor turns thousands of hours a year, every point of efficiency shows up directly on the electricity bill. IE3 motors therefore minimise the total cost of ownership in plants running around the clock.

Factors That Determine Long Life

In continuous duty the most critical elements are bearing life and winding insulation. Class F insulation and a low running temperature keep the insulation intact for years. Quality bearings and the correct relubrication interval determine the mechanical life.

Protection and Operating Conditions

IP55 protection safeguards the winding against dust and splashing water. The cast iron housing keeps its dimensions through constant heating and cooling cycles and damps vibration, letting the bearings run without rotor misalignment.

Uninterrupted Production with DRG Motor

Izmir-based DRG Motor supplies IE3 continuous-duty motors from 0.55 to 355 kW with B3, B5 and B14 mounting options. Share your running hours and your line's load profile and we will determine together the motor configuration that delivers the longest life.