Nordex and ACCIONA Windpower N149/4.0-4.5
Wind Turbine

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Nacelle Turbine

Wind Turbine

Nordex N149/4.0-4.5 Wind Turbine

Technology of the Wind Turbine

Proven Technology Drive train concept

The drive train is based on Nordex’s proven modular drive train concept that utilizes three-point suspension. Together with our qualified suppliers, we work to continuously improve our drive train components in order to maintain maximum availability while delivering the optimal energy output.

Drive train concept – Nordex N149/4.0-4.5

Proven Technology Electrical system concept

The N149/4.0-4.5 is equipped with a doubly-fed asynchronous generator and a partial converter. This is a proven and highly economical electrical system that we have employed since Nordex first introduced multi-megawatt turbines. With the launch of the N149/4.0-4.5, we rearranged the location of the converter and transformer from the base of the tower to the nacelle. This ensures a higher annual energy production and simplifies the tower internals.

Proven Technology Nordex Control ™

More than 5,000 Nordex turbines have already been fitted with the tried and tested Nordex Control™ system. It handles the operational control, adjustment and monitoring of the turbine systems. Nordex Control offers permanent, protected access to turbine and wind farm data either on-site or remotely through a browser-based, interactive, secure platform. With its modular structure and standardised interfaces, Nordex Control™ can be flexibly configured to suit the customer’s SCADA requirements.

Proven Technology Grid compatibility

The turbines of Generation Delta meet the grid requirements of international markets. Thanks to their fault-ride-through capability our turbines can bridge voltage drops easily. In addition, the Nordex Wind Farm Management System also allows the grid operator to directly control the active and reactive power of the wind farm in the grid.

Proven Technology Cold climate

The tried and tested Nordex cold-climate package is designed to meet the challenges of especially cold locations. Turbines in the cold-climate version (CCV) can reliably operate down to an outside temperature of -30 degrees Celsius.

Proven Technology Standard operating temperature

The standard operating temperature of the Generation Delta turbines is also applicable for the N149/4.0-4.5: the normal climate turbines can be operated even at -20 degrees Celsius – an advantage for generating the maximum annual yield.

Proven Technology Rotor blade design

The one-piece NR74.5 rotor blade developed in-house with a swept area of 17,460 square metres. Nordex essentially maintained the rotor blade structure and proven airfoil design used in previous turbine models while optimising the design for transport and production.

Next Level Rotor Diameter

Nordex offers now a much larger rotor for the low to medium wind class. Extending the rotor diameter by 18 meters gives the N149/4.0-4.5 a 30 percent increase in swept area – producing significantly higher yields.

Next Level Nominal power

The N149/4.0-4.5 has a variable maximum output of between 4.0 and 4.5 MW, creating up to 28% higher yield compared to the N131/3600. This flexibility ensures a maximum turbine utilization across different sites.

Next Level Sound power

Despite the considerable increase in nominal output and blade length, the design of the N149/4.0-4.5 achieves the low sound power levels expected from a much smaller turbine. This is a crucial factor for optimising windfarms and facilitating permitting especially in populated areas.

In addition, Nordex also offers a wide range of sound-optimised operating modes that make it possible to run WTGs at particularly sound-critical locations. The turbines still achieve optimal energy yield thanks to Nordex Flexible Sound Management functionality. Even at a maximum sound power level of 96.5 dB(A), the turbine is able to produce close to 3 MW nominal power.

Next Level Nordex Anti-Icing

Icing on the rotor blades can reduce the efficiency of a wind turbine generator and lower its availability. For the N149/4.0-4.5, Nordex has taken the next step for increased performance under icing conditions. The proven Nordex rotor blade anti-icing-system has been further developed to heat even more blade area and efficiently avoids or reduces icing on the rotor blades. Nordex customers can rely on their turbines for dependable yields and maximum availability in even the coldest locations.

Next Level Hub heights

Several different hub height options make it possible to optimally utilize the wind resources at diverse sites. Tall tower options up to 164 meters help to increase yield and make wind projects possible even at sites in forested areas or locations with complex topography.

Next Level Flexible turbine concept

The Delta4000 can take a large number of site-specific requirements into account using a single hardware variant. For this reason, it can be set exactly to the specific parameters of the grid operator, to local wind conditions and to the maximum permissible sound levels. This operational flexibility makes it possible to make use of different maximum ratings of individual turbines within a wind farm, thus exploiting the full potential of each turbine position.


Nordex N149/4.0-4.5 Turbine

Technology of the Wind Turbine

Proven Technology Drive train design

The drive train geometry of Generation Delta reduces the forces acting on the individual components, thereby reducing strain on the robust rotor bearing. On top of this, innovations in the cooling system design of the drive train ensure constant temperatures over a wide operating range, with lower internal energy consumption.

Drive train design – Nordex N149/4.0-4.5

Proven Technology Hub access

N149/4.0-4.5 provides rapid and protected access to the hub thanks to a complete rotor hub housing.

Hub access – Nordex N149/4.0-4.5

Proven Technology Safety and ergonomics

The nacelle of the Generation Delta is a safe and spacious workplace with well thought-out escape and rescue routes. Our design gives high priority to service-friendliness and reduction of maintenance downtimes.

All systems are easily accessible for maintenance.
On-board crane for components exchange (up to one ton).

Safety and ergonomics – Nordex N149/4.0-4.5

Next Level Service interval

The technical concept of the N149/4.0-4.5 minimises the service requirements over its entire working life; with each component designed for minimal maintenance. Furthermore, the turbine has been designed to cater to a mobile crane solution so that main components can be exchanged with minimal costs and effort.

Service interval – Nordex N149/4.0-4.5

Next Level Yaw system

The yaw drive system of the N149/4.0-4.5 was adapted to the increased nominal power and rotor size. Additional drives were added for a total of six yaw drives. However, should one drive break down, the turbine can continue to run temporarily on five drives, making it possible to plan any needed service work without interruption. This concept increases turbine availability and reduces service costs.

Yaw system – Nordex N149/4.0-4.5

Next Level Electrical system

In order to further reduce electrical losses and simplify assembly of tower internals, the main converter and step-up transformer have been integrated into the nacelle. This ensures a higher annual energy production and simplifies installation on the construction site.