
General Purpose Motors

Electrical Motors are electromechanical devices that convert electrical energy to mechanical energy by producing a rotating force (torque) measured in revolutions per minute (RPM) and horsepower (HP). Medium size motors are designed and built to operate at 60 Hz with three phase voltage at 230 volts, 460 volts and 575 volts. These motors are used to drive compressors, pumps, fans, machine tools, conveyers and other processing and materials handling equipment in industrial sectors.
General Purpose Motors are designed for use in pumps, conveyors, blowers and many other standard duty applications. They are available in three types of motor frame construction: aluminum, cast iron and rolled steel and two types of enclosures: Open Drip Proof (OPD) and Totally Enclosed Fan Cooled (TEFC). OPD enclosures have a shaft-mounted fan that pulls air directly from the environment through open vents in the motor’s body, circulating it around the inside of the motor and over the stator and rotor windings for cooling. These motors should only be used in environments that are free from airborne contaminants. They can protect against falling drops of liquid from entering the motor from angles up to 15 degrees. TEFC enclosures use an external, shaft-mounted fan at the rear of the motor to blow air over the body to cool it. Seals and gaskets prevent air from freely moving between the interior of the motor and the surrounding environment.
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