“This standard is no longer an American National Standard or an ASME-approved standard. It is available for historical reference only.”

The primary objective of this Code is to compare the net amount of electrical energy produced by the wind turbine (WT) during a given period of time to the predicated test energy for the same period and same wind speed histogram. This Code specifies the methods, procedures, and instrumentation for the field testing and reporting of WT performance. These procedures and practices were specifically compiled for WTs of 100 kW or more, but are applicable to all sizes.  The Code may be used for the following secondary objectives: (a) Comparing the power-versus-windspeed curve to the reference power-versus-windspeed curve; (b) Comparing the annual energy output calculated using the test power-versus-windspeed curve with that calculated using the reference power-versus-windspeed curve, for the same windspeed histogram; (c) Determining the effects on WT performance of changes to subsystems and components of the WT or changes in the methods of operation for specified conditions at a given site; and (d) Comparing the performance of the WT with the established performance of other WTs at the same or different sites.