This International Standard applies to lightning protection of wind turbine generators and wind power systems. The standard contains normative references to generic standards for lightning protection, low-voltage systems and high-voltage systems for machinery and installations and electromagnetic compatibility (EMC). This standard defines the lightning environment for wind turbines and describes the application of the environment for risk assessment for the wind turbine. It defines requirements for protection of rotor blades, other structural components and electrical and control systems against both direct and indirect effects of lightning. Test methods to validate compliance are also recommended. Guidelines for the use of applicable lightning protection, industrial electrical and EMC standards including earthing are provided. Furthermore, guidelines regarding personal safety are provided. The standard contains guidelines for damage statistics and reporting. The responsible Committee is K 383 "Windenergieanlagen" ("Wind turbines") of the DKE (German Commission for Electrical, Electronic and Informational Technologies) at DIN and VDE.