This part of IEC 61400 specifies essential design requirements to ensure the engineering
integrity of wind turbines. Its purpose is to provide an appropriate level of protection against
damage from all hazards during the planned lifetime.
This standard is concerned with all subsystems of wind turbines such as control and protection
mechanisms, internal electrical systems, mechanical systems and support structures.
This standard applies to wind turbines of all sizes. For small wind turbines IEC 61400-2 may be
applied.
This standard should be used together with the appropriate IEC and ISO standards mentioned
in Clause 2.