GL publishes new guidelines for onshore wind components

The 2010 Guideline for the Certification of Wind Turbines replaces the last edition, published in 2003 and supplemented in 2004.

GL Renewables Certification (GL, Hamburg, Germany) reported on July 1 that it has published its latest edition of guidelines for onshore wind turbines and components. In the 2010 edition of GL's guidelines, the procedures to obtain type and project certificates are described. Type certification comprises design assessment, implementation of the design requirements in production and erection, evaluation of quality management and prototype testing. And on the basis of type certification, project certification is carried out that covers site design conditions, site-specific design assessment, and surveillance during production, transport and erection as well as witnessing of commissioning and periodic monitoring.

Mike Woebbeking, GL Renewables Certification, explained the relevance of the new guidelines: "It is important for manufacturers of wind turbines and components as well as banks and insurers involved to know the different certification processes and guidelines."

The most important part of the Type Certification is the assessment of the design documentation, according to Woebbeking. In addition, the implementation of the design requirements in production and erection shall be observed. Therefore, the manufacturers of wind turbines and components will be evaluated all the way in terms of their quality management, and prototype testing will be made to guarantee the product quality and to verify the performance of the safety and control systems of the turbines.

The Edition 2010 is to substitute the current Edition 2003 with Supplement 2004. "The new edition will additionally cover small wind turbines and latest information on several prominent wind energy markets. It will have effect on future wind turbine developments worldwide," Woebbeking pointed out.

GL has been involved in the development of national and international standards and is an international leading certification body for wind turbines. Its certification services for wind energy products and projects are besides others provided on the basis of the GL Guideline for the Certification of Wind Turbines.

The guideline can be ordered from GL by contacting Anja Schroeder,, +49 40 36149-3614.