Resumen
This document establishes a classification for fan efficiency. It applies to all electric-motor-driven fan systems that utilize a specific combination of components as defined below:
a) fan airflow performance determined in accordance with an accepted performance standard;
b) polyphase induction motors with nominal motor efficiency specified in this document;
NOTE 1 Other types of motors are explicitly excluded.
c) pulse-width modulated variable frequency drives (VFDs) for use with single motors;
NOTE 2 Single VFDs that service multiple, parallel fan motors are excluded.
d) mechanical power transmissions that utilize V-belts, flat belts, cog belts or couplings.
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Informaciones generales
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Estado: PublicadoFecha de publicación: 2019-03Etapa: Norma Internacional en proceso de revisión sistemática [90.20]
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Edición: 1Número de páginas: 21
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Comité Técnico :ISO/TC 117ICS :23.120
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