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Tom Bishop, PE Especialista sénior de soporte técnico de EASA
El 9 de enero de 2026, NEMA anunció la revisión de la Tabla 12-23 de la norma MG 00001-2024, Motores y Generadores.
Su nuevo título es “Full-Load Efficiencies of 60 Hz Premium 4 Efficient Polyphase Electric Motors Rated 600 V or Less.” que en la edición original de la MG 00001-2024 se titulaba “Full- Load Efficiencies of 60 Hz Super Premium Efficient Polyphase Electric Motors Rated 600 V or Less”. Cabe destacar que NEMA ha modificado parte de la terminología para estos motores de mayor eficiencia (nivel IE 4), cambiando "Muy alta eficiencia" por "Premium 4".
Las revisiones incluyen nuevas eficiencias nominales y mínimas a plena carga para motores abiertos de 2, 4, 6 y 8 polos con potencias nominales de 1 a 75 hp y de 300 a 750 hp. La edición original cubría motores abiertos de 2, 4, 6 y 8 polos con potencias nominales de 100 a 250 hp. La publicación de la nueva Tabla 12-23 se realizará en 2026 como parte de la próxima edición de NEMA MG 00001.
La tabla revisada se puede descargar utilizando el enlace que aparece a continuación. Su aplicación es inmediata para que los fabricantes indiquen estos niveles de eficiencia en las placas de datos de los motores correspondientes.
This 40-page booklet provides great advice for obtaining the longest, most efficient and cost-effective operation from general and definite purpose electric motors.
This booklet covers topics such as:
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The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors Tests prove Premium Efficiency/IE3 Motors can be rewound without degrading efficiency.
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Recommended Practice for the Repair of Rotating Electrical Apparatus This is a must-have guide to the repair of rotating electrical machines. Its purpose is to establish recommended practices in each step of the rotating electrical apparatus rewinding and rebuilding processes.
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Revised October 2025 The EASA Technical Manual is the association's definitive and most complete publication. It's available FREE to members in an online format. Members can also download PDFs of the entire manual or individual sections.
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