I.S. EN 61400-12-1:2017

National Foreword
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Power performance method overview
6 Preparation for performance test
7 Test equipment
8 Measurement procedure
9 Derived results
10 Reporting format
Annex A (normative) - Assessment of influences caused
        by wind turbines and obstacles at the test site
Annex B (normative) - Assessment of terrain at the test
        site
Annex C (normative) - Site calibration procedure
Annex D (normative) - Evaluation of uncertainty in
        measurement
Annex E (informative) - Theoretical basis for determining
        the uncertainty of measurement using the method of
        bins
Annex F (normative) - Wind tunnel calibration procedure
        for Anemometers
Annex G (normative) - Mounting of instruments on the
        meteorological mast
Annex H (normative) - Power performance testing of small
        wind turbines
Annex I (normative) - Classification of cup and sonic
        anemometry
Annex J (normative) - Assessment of cup and sonic
        anemometry
Annex K (normative) - In-situ comparison of anemometers
Annex L (normative) - The application of remote sensing
        technology
Annex M (informative) - Normalisation of power curve data
        according to the turbulence intensity
Annex N (informative) - Wind tunnel calibration procedure for
        wind direction sensors
Annex O (informative) - Power performance testing in cold
        climate
Annex P (informative) - Wind shear normalisation procedure
Annex Q (informative) - Definition of the rotor equivalent wind
        speed under consideration of wind veer
Annex R (informative) - Uncertainty considerations for tests on
        multiple turbines
Annex S (informative) - Mast flow distortion correction for lattice
        masts
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications