ISO DIS 12759-2

Description / Abstract: The scope of this standard includes all electric motor driven fan systems that utilize a specific combination of components as defined below:

1) Fan airflow performance tested in accordance with ISO/Standard 5801, Industrial fans -- Performance Testing Using Standardized Airways.

2) Polyphase induction motors within the scope of the US Energy Independence and Security Act of 2007, IEC 60034-30, Rotating electrical machines - Part 30-1: Efficiency classes of line operated AC motors, or GB 18613, Minimum Allowable Values of Energy Efficiency and Energy Efficiency Grades for Small and Medium Three-Phase Asynchronous Motors. Other types of motors are explicitly excluded.

3) Pulse-width modulated variable frequency drives (VFD) for use with single motors. Single VFDs that service multiple, parallel fan motors are excluded.

4) Mechanical power transmissions that utilize V-belts, flat belts, cog belts, or couplings.