Induction Motors - continued.

The induction motors are designed for specific applications. Some of the common designs are:

Totally Enclosed Fan-Cooled Motor (TEFC motor)

The totally enclosed, fan-cooled motor has totally enclosed windings and rotor. Cooling air is circulated inside the enclosure to remove heat. This type of motor is used in locations where the surrounding air may contain a high proportion of dust or other contaminants.

Explosion-Proof Motors

This type of motor is designed to be used in locations where it is likely that they may come in contact with explosive gases.

Splash-Proof Motors

The splash-proof motor is constructed so dripping or splashing liquids cannot enter the motor. The motor is self-ventilated; but, since moisture-saturated air may be circulated through the motor, the windings are made moisture-resistant materials. Motors of this type are most often used to drive pumps and other machinery where the moisture content of the air is high.

The graphic provided here illustrates how the rotor cage of squirrel cage motors is constructed.