3.4M122 NES

Best for Mid-Speed Winds

Along with an increase in nominal power to 3,400 kW, the successor to the 3.2M122 is also certified for wind class IEC IIA and locations in wind zone 4. The energy yield at mid-speed winds and a hub height of 139 meters is up to 2.4 percent higher. This new system provides improvements in two essential areas. Firstly, it further increases the efficiency of energy production and secondly, it helps integrate renewable energies more sustainably into power networks, by improving electrical capabilities.

  • Nominal power: 3,400 kW
  • Rotor diameter: 122 m
  • Hub height: 86 - 139 m

  • Wind class: Low to Medium Wind
  • Operating temperature range: -20 – +40 °C
  • Rotor surface: 11,690 m²

Technical data 3.4M122 NES

Design data

Nominal power3,400 kW
Cut-in wind speed3 m/s
Nominal wind speed12.5 m/s
Cut-out wind speed22 m/s
Operating temperature range-20 – +40 °C


    Hub heightWind classDIBt Wind zone
    89 – 139 mIEC IIAWZ 4, GK II


      Diameter122 m
      Rotor area11,690 m²
      Rotor speed6.1 – 11.3 1/min (+15 %)
      Power controlElectrical pitch

        Rotor blade

        Blade length59.8 m
        TypeGlass fiber-reinforced plastic (GFRP)
        Max. chord width3.9 m

          Electrical system

          Nominal frequency50 Hz
          GeneratorSquirrel Cage Induction Generator
          Generator protection classIP 54
          Converter typeLiquid-cooled full converter
          TransformerInternal Transformer (ITS)

            Sound power level

            Maximum sound power level104.5 db (A)

              Power curve

              Senvion Technology

              The 3.XM series features a well-proven modular and evolutionary technology concept. The smart and robust design results in a highly efficient and reliable turbine concept: from the aerodynamically optimized rotor blade, compact and efficient drivetrain, advanced control technology right through to the transformer. This flawless interplay delivers high energy yields while keeping sound emissions low.

              Next Electrcial System

              Our turbines, which are equipped with the Next Electrical System (NES), already fulfil the grid requirements of tomorrow. All NES turbines are based on the tried and tested MM and 3.XM series construction concept.

              1. 1

                Generator/frequency converter

                • Variable speed range for optimum yields
                • Fully encapsulated generator with air-air heat exchanger
                • Optimum temperature inside generator, even at high ambient temperatures
                • Water-cooled converter power electronics for optimised cooling
                • The converter and controllers are located in the tower base, leaving even more space in the nacelle and making operation that much easier

              2. 2

                Gear system

                • Planetary/spur gear
                • Satisfies stringent demands in terms of service life and operating smoothness in line with Senvion gear specifications
                • Elastomeric torque arm bearing for structure-borne sound insulation
                • Low temperature thanks to efficient oil cooling system
                • Three-stage oil filter system for excellent oil quality

              3. 3

                Rotor blade

                • Individual blade profiles for optimal aerodynamics of the rotor
                • Robust aerodynamic design guarantees best possible performance, even in difficult wind conditions or when dirty
                • Proven quality, tested statically and dynamically in accordance with IEC specifications
                • Fully integrated lightning protection in accordance with IEC protection class I

              4. 4

                Pitch system

                • Virtually maintenance free electrical system
                • High-quality, large blade bearing with permanent track lubrication and external gearing
                • Integrated deflector in the spinner as protection from the elements
                • Maximum reliability through redundant blade angle detection with two independent measuring systems
                • Fail-safe design with independent drive and control systems for each rotor blade

              5. 5

                Rotor bearing and rotor shaft

                • High quality spherical roller bearing with bearing with perfectly fitted bearing housing and permanent lubrication for maximum service life
                • Rotor shaft aligned with transfer of torque

              6. 6


                • Four-point contact bearing with external gearing, powered by top quality high-performance gear motors
                • Holding brakes with hydraulic pressure accumulator for fail-safe function relieve drive systems when inoperative and stabilise nacelle
                • Minimum stress on the drive trains thanks to low friction of four-point bearing and brake release during wind tracking

              7. 7

                Holding brake

                • Generously dimensioned disc brakes hold rotor safely
                • Soft brake function for minimum wear of gearbox

              8. 8


                • Natural frequency of tower higher than rotational speed of rotor (rigid design) ensures minimum stress on tower and nacelle
                • No speed restrictions, as no frequency interference
                • Maximum component safety thanks to L-shaped flange and stress-optimised door opening

              Title File Size
              Technical specifications 3.4M122 NES PDF 100 KB
              Senvion - Portfolio Overview PDF 1.6 MB

              Please contact the relevant company within the Senvion Group to check the availability of a given product in your country.

              Contact us

              Senvion Sales
              Überseering 10
              22297 Hamburg