DIN EN 61400-23:2014-12

This standard DIN EN 61400-23 (VDE 0127-23) defines the requirements for full-scale structural testing of wind turbine blades and for the interpretation and evaluation of achieved test results. This standard focuses on aspects of testing related to the evaluation of the integrity of the blade, for use by manufacturers and third party investigators. As such, the testing can be part of a certification process according to IEC WT01. The following tests are considered in this standard: - static load tests; - fatigue tests; - static load tests after fatigue tests; - tests determining other blade properties. The purpose of these tests is to confirm to an acceptable level of probability that the whole population of a blade type fulfils the design assumptions. It is assumed that the data required to define the parameters of the tests are available and based on the standard for design requirements for wind turbines such as IEC 61400-1 or equivalent. Design loads and blade material data are considered starting points for establishing and evaluating the test loads. The evaluation of the design loads with respect to the actual loads on the wind turbines is outside the scope of this standard. Most principles and structural testing are applicable to any wind turbine configuration, size and material. This edition includes technical changes, in the description of load based testing and a summary of the description of the general principles and demands with respect to IEC/TS 61400-23. The responsible committee is DKE/K 383 "Windenergieanlagen" ("Wind turbines") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.