This standard, an adoption of IEC 61400-1, defines the essential design requirements for wind turbines to ensure structural integrity against operational and environmental loads. It establishes a framework based on turbine classes, external conditions, and standardized load cases for designing safe and reliable wind energy systems.
Specifies design requirements for wind turbines covering all subsystems, such as control and protection systems, internal electrical systems, mechanical systems and support structures.
Quick Reference Values
Reference wind speed (Class I)50 m/s
Reference wind speed (Class II)42.5 m/s
Reference wind speed (Class III)37.5 m/s
Partial safety factor for loads (Normal)1.35
Partial safety factor for steel structures1.10
Practical Notes
The core of the standard is the definition of Design Load Cases (DLCs), which are essential for simulating and calculating loads for all life-cycle events.
Accurate site-specific wind data is crucial for selecting the correct turbine class (I, II, III, IV) and applying appropriate load factors.
This is a dual-numbered standard, an identical adoption of the IEC version. Designers must also consider any Indian national annexes or differences.