NEMA – Air-Over Motors

NEMA Motors and Generators Standard Adds New Efficiency Test for Air-Over Motors

ROSSLYN, Va.—Today, the National Electrical Manufacturers Association (NEMA) released a new efficiency test method for air-over (AO) motors as part of its MG 1 Motors and Generators standard.

Part 34: Air-Over Motor Efficiency Test Method, covers AO motors that operate in and are cooled by the airstream of a fan or blower that is not supplied with the motor, and whose primary purpose is providing airflow to an application rather than the primary purpose of cooling the motor. There are three temperature test procedures recognised by the NEMA Motors and Generators (1MG) Technical Committee.

“AO motors require special procedures to reach an appropriate temperature. These test procedures replace the temperature test portion of the applicable efficiency test method,” said Tim Schumann service manager of SEW-Eurodrive, Inc., and chair of 1MG.

NEMA MG 1-2016 is available in hard copy for $484 and as an electronic download at no cost on the NEMA website. For those who previously purchased a copy of NEMA MG 1-2016, click here to receive Part 34 as a download at no cost.

The National Electrical Manufacturers Association (NEMA) represents 350 electrical, medical imaging, and radiation therapy manufacturers at the forefront of electrical safety, reliability, resilience, efficiency, and energy security. Our combined industries account for more than 400,000 American jobs and more than 7,000 facilities across the United States. Domestic production exceeds $114 billion per year and exports top $50 billion.

 

Source: NEMA Standard Adds Efficiency Test for Air-Over Motors

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