Three-phase motors rated at 7.5 kW are one of the most common power figures on small and medium production lines. This power class sits at a balanced point between a compact frame size and adequate torque, fitting easily into tight machine cabinets.

Typical Dimensions of the 7.5 kW Class

A 4-pole 7.5 kW motor turns at around 1500 rpm on a 50 Hz supply and is usually built in a 132 frame size. This gives a noticeably lighter and shorter structure than larger motors, saving space in conveyor drives, small pumps and compressors, and mixers.

The Effect of Speed Options

The same 7.5 kW rating is offered with different pole counts: 2 poles give high speed at 3000 rpm, 4 poles a balanced torque at 1500 rpm, and 6 poles high torque at 1000 rpm. The speed the application requires directly affects gearbox selection and the final belt-and-pulley ratio.

Durability and Protection

Cast iron 7.5 kW motors damp vibration better than aluminium-bodied units and suit heavier industrial environments. IP55 protection gives adequate cover against dust and splashing water, while Class F insulation and S1 continuous duty deliver stable performance over long shifts.

Making the Right 7.5 kW Choice

Frame type, speed and mounting arrangement (B3 foot, B5 flange, B14 face) should be determined by your machine's design. DRG Motor, manufacturing in Izmir, supplies the 7.5 kW class with various pole and frame options from stock or at short lead time; reach out for the configuration that fits your need.