When buying an industrial electric motor, the right choice depends not only on the power rating but on the application's load type, running hours and ambient conditions. A poorly sized motor either runs inefficiently or fails early.

Needs Analysis

Before the sale, the torque, speed and inertia required by the driven machine must be established. Variable-torque loads such as pumps and fans call for a different motor characteristic than constant or high-starting-torque loads such as conveyors and crushers.

Power and Speed Selection

On a 400 V / 50 Hz supply, 4-pole (1500 rpm) motors are the most common general-purpose solution. High-speed equipment uses 2-pole (3000 rpm), while low-speed heavy loads use 6-pole (1000 rpm). The power range spans 0.55 kW to 355 kW.

Efficiency Class and Protection

In plants running long hours, the IE3 and IE4 efficiency classes lower energy costs. In dusty and humid settings, IP55 protection, Class F insulation and S1 continuous duty keep the motor running safely; a cast iron frame is recommended for harsh conditions.

Buying Right With DRG

İzmir-based supplier DRG Motor sizes the motor to your application data before the sale and provides technical support on power, speed and mounting (B3, B5, B14), so the right model is supplied the first time.