SN EN 61400-1 : 2005

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
   4.1 Symbols and units
   4.2 Abbreviations
5 Principal elements
   5.1 General
   5.2 Design methods
   5.3 Safety classes
   5.4 Quality assurance
   5.5 Wind turbine markings
6 External conditions
   6.1 General
   6.2 Wind turbine classes
   6.3 Wind conditions
   6.4 Other environmental conditions
   6.5 Electrical power network conditions
7 Structural design
   7.1 General
   7.2 Design methodology
   7.3 Loads
   7.4 Design situations and load cases
   7.5 Load calculations
   7.6 Ultimate limit state analysis
8 Control and protection system
   8.1 General
   8.2 Control functions
   8.3 Protection functions
   8.4 Braking system
9 Mechanical systems
   9.1 General
   9.2 Errors of fitting
   9.3 Hydraulic or pneumatic systems
   9.4 Main gearbox
   9.5 Yaw system
   9.6 Pitch system
   9.7 Protection function mechanical brakes
   9.8 Rolling bearings
10 Electrical system
   10.1 General
   10.2 General requirements for the electrical system
   10.3 Protective devices
   10.4 Disconnect devices
   10.5 Earth system
   10.6 Lightning protection
   10.7 Electrical cables
   10.8 Self-excitation
   10.9 Protection against lightning electromagnetic impulse
   10.10 Power quality
   10.11 Electromagnetic compatibility
11 Assessment of a wind turbine for site-specific conditions
   11.1 General
   11.2 Assessment of the topographical complexity of the site
   11.3 Wind conditions required for assessment
   11.4 Assessment of wake effects from neighbouring wind
         turbines
   11.5 Assessment of other environmental conditions
   11.6 Assessment of earthquake conditions
   11.7 Assessment of electrical network conditions
   11.8 Assessment of soil conditions
   11.9 Assessment of structural integrity by reference to
         wind data
   11.10 Assessment of structural integrity by load
         calculations with reference to site specific
         conditions
12 Assembly, installation and erection
   12.1 General
   12.2 Planning
   12.3 Installation conditions
   12.4 Site access
   12.5 Environmental conditions
   12.6 Documentation
   12.7 Receiving, handling and storage
   12.8 Foundation/anchor systems
   12.9 Assembly of wind turbine
   12.10 Erection of wind turbine
   12.11 Fasteners and attachments
   12.12 Cranes, hoists and lifting equipment
13 Commissioning, operation and maintenance
   13.1 General
   13.2 Design requirements for safe operation, inspection
         and maintenance
   13.3 Instructions concerning commissioning
   13.4 Operator's instruction manual
   13.5 Maintenance manual
Annex A (normative) Design parameters for describing wind
         turbine class S
Annex B (informative) Turbulence models
Annex C (informative) Assessment of earthquake loading
Annex D (informative) Wake and wind farm turbulence
Annex E (informative) Prediction of wind distribution for
         wind turbine sites by measure-correlate-predict (MCP)
         methods
Annex F (informative) Statistical extrapolation of loads for
         ultimate strength analysis
Annex G (informative) Fatigue analysis using Miner's rule
         with load extrapolation
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography

Specifies essential design requirements to ensure the engineering integrity of wind turbines. Provides an appropriate level of protection against damage from all hazards during the planned lifetime.