355 kW is the top power step of DRG Motor's standard industrial range and comes into play on the most demanding drives that need roughly 485 HP of mechanical output. With a 1500 rpm rating and a 4-pole cast iron frame, this IE3 motor acts as a backbone for large crushing-and-screening lines, main pump groups and high-capacity fan systems.

Why 355 kW Is the Ceiling

At this power class the motor calls for the most careful engineering in terms of starting current, rotor inertia and cooling demand. It sits at the top of the family that runs from 0.55 to 355 kW and is usually commissioned with a soft starter or a frequency inverter. At this scale, mechanical balance and bearing choice become decisive for continuous running.

Why the Cast Iron Frame Matters

At 355 kW the frame is always cast iron; the high mass damps vibration and provides a rigid structure able to carry large bearing loads. IP55 protection suits dusty and humid industrial settings, while Class F insulation leaves a safety margin against the temperature rise under heavy load. The S1 rating points to uninterrupted rated duty.

What Efficiency Means at High Power

The IE3 Premium class turns even a small percentage difference into high absolute energy at this output; in a plant with many annual running hours that gap is felt in operating cost. The 4-pole 1500 rpm design is a common input speed for geared drives and is compatible with a 400 V / 50 Hz supply.

Planning the 355 kW Drive

At this output, selection covers the starting method, foundation and coupling alignment, and drive compatibility. Izmir-based supplier DRG Motor configures the 355 kW IE3 cast iron motor to the mounting type (usually B3 foot) and project conditions, and advises on lead time and technical detail at the quotation stage.