GENERATION GAMMA -

CONTENTS 3 NORDEX A PROFILE Dependable power plants for a clean environment 4 THE EFFICIENCY CLASS Experience puts us one step ahead 6 YIELD Maximum energy yield at any location 8 GRID CODE COMPLIANCE Active support for every grid 9 QUALITY Top-quality engineering - simply routine for us TURBINE PORTFOLIO AT A GLANCE 10 12 SOLUTION FOR MODERATE WIND Protable at varied locations 14 2 SOLUTION FOR STRONG WIND Dependable yields in rough climates SOLUTION FOR LIGHT WIND Maximum economic efciency

NORDEX – A PROFILE Dependable power plants for a clean environment Economic prosperity, progress and environmental protection – for Nordex these go hand in hand. Since 1985, we have been developing increasingly effective wind turbines that help meet the growing global demand for energy while reducing the impact on the environment. As an internationally expanding company, Nordex has a footprint in all the growth markets. Our factories in Germany, China and the United States serve the markets in the core regions of Europe, Asia and the Americas. We deliver tailor-made, all-round solutions to our...

THE EFFICIENCY CLASS Experience puts us one step ahead The Efficiency Class combines the latest research and development with know-how and experience from more than a decade of operation to meet today‘s market requirements. In 2000, Nordex installed the first 2.5 MW series turbine in the world and has put more than 2,000 machines of this type on grid since then. When we say that our turbines offer high quality, mature technology and dependable performance even in extreme locations, we know what we‘re talking about. Nordex continues to develop the Efficiency Class. Yet we remain true to proven...

The Nordex Efficiency Class sets the highest standards for yield grid code compliance quality 5

YIELD Maximum wind yield at any location Our commitment to continuous development ensures that Nordex wind turbines offer a high level of technical availability of more than 97 percent, making it even more worthwhile to invest in a turbine of the Efficiency Class. The perfect machine for every type of wind With its N90/2500, N100/2500 and N117/2400 turbines the Efficiency Class achieves the maximum yield at every site. Nordex offers the N90/2500 for regions with strong winds and the N100/2500 for areas with moderate wind conditions. The N117/2400 has been specially designed for locations with...

Service – simple, fast and safe Thanks to the service-friendly design of the turbines, Nordex has reduced maintenance time to the minimum. Service can be carried out under a closed roof regardless of weather conditions. Continuous work surfaces with sufficient space and light support fast and safe servicing. All components are directly accessible and can be easily, safely and inexpensively maintained with the aid of the internal crane. In addition, reliable turbine operation is supported by low-maintenance and maintenance-free components. Round-the-clock performance checks To ensure maximum availability,...

GRID CODE COMPLIANCE NETZKOMPATIBILITÄT Active support for every grid Beste Stromqualität in allen Netzen. The turbines in the Efficiency Class are characterised by excellent control capabilities for maintaining the voltage and stabilising the frequency of the public grid. They meet all the requirements for the German system service bonus (known as the SDL-Bonus).* Their fault-ride-through capability enables them to bridge effortlessly any dips in voltage. The Nordex wind farm management system allows the grid operator to directly control the rated and reactive power of the wind farm in the grid....

QUALITY Top-quality engineering – simply routine for us Thanks to their sophisticated design, the wind turbines in the Efficiency Class are certified quality products. From the earliest development phase Nordex engineers check the stress levels of materials and components using advanced computer-aided calculation routines. These are followed by extensive testing in the Nordex Test Centre and in the field. Extreme testing of hardware and software In the Nordex Test Centre our engineers inspect the components and systems of the prototypes under simulated wind and weather conditions. By subjecting...

SOLUTION FOR STRONG WIND Dependable yields in rough climates Wind locations with rough climates require mature, robust technology. The IEC-1-certified N90/2500 has been specifically designed for these conditions. For any strong wind site, it is the first choice for its price/performance ratio. Nordex has already connected the N90/2500 to the grid hundreds of times in Europe, Asia and North America. The N90/2500 is the most frequently installed turbine in the Efciency Class and has proven itself around the globe. 10

FACTS AND FIGURES N90/2500 IEC I Operating data Rated power 2,500 kW Cut-in wind speed 3 m/s Cut-out wind speed 25 m/s Rotor Diameter 90 m Swept area 6,362 m² Operating range rotational speed 10.3 - 18.1 rpm Rated rotatinal speed 16.1 rpm Tip speed 75 m/s Speed control Variable via microprocessor Overspeed control Pitch angle Gearbox Construction Combined spur/planetary gear or differential gearbox Generator Construction Cooling system Double-fed asynchronous generator Liquid/air cooling Voltage 660 V Grid frequency 50/60 Hz Control Control centre PLC controlled Grid connection Via IGBT converter...

SOLUTION FOR MODERATE WIND Profitable at varied locations For projects with moderate wind speeds Nordex offers the N100/2500 turbine. The N100/2500 is one of the machines with the highest yield at IEC 2 locations. For even more efficiency Nordex has raised the cutout wind speed from 20 to 25 m/s. Thanks to their robust technology, the N100/2500 is ideal for wind farms in the widely different climatic conditions prevailing around the world. The N100/2500 is one of the highest yielding machines at IEC 2 locations. 12

Operating data Cut-in wind speed 3 m/s Cut-out wind speed 25 m/s Operating range rotationa Rated rotatinal speed 14.9 rpm Speed control Variable via microprocessor Overspeed control Pitch angle Construction Combined spur/planetary gear or differential Constructior_Double-fed asynchronous generator Pooling system_Liquid/air cooling_ Control centre_PLC controlled_ Grid connection Via IGBT converter Distance control_Remote controlled surveillance system Brake system Main brake_Pitch angle_ Secondary brake Disk brake Lightning protection Fully compliant with EN 62305 Construction Tubular steel tower...