3.4M122 NES

Best for Mid-Speed Winds

Along with an increase in nominal power to 3,400 kilowatts, 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

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.

The NES platform - An electrical system for any grid requirements

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

Technical data 3.4M122 NES

Design data

Nominal power 3,400 kW
Cut-in wind speed 3 m/s
Nominal wind speed 12.5 m/s
Cut-out wind speed 22 m/s
Operating temperature range -20 – +40 °C


Hub height Wind class DIBt Wind zone
86 – 89 m IEC S (based on IEC IIA) WZ 4, GK II
116 – 119 m IEC S (based on IEC IIIA) WZ 3, GK II
136 – 139 m IEC S (based on IEC IIIA) WZ 3, GK II


Diameter 122 m
Rotor area 11,690 m²
Rotor speed 6.1 – 11.3 1/min (+15 %)
Power control Electrical pitch

Rotor blade

Blade length 59.8 m
Type Glass fiber-reinforced plastic (GFRP)
Max. chord width 3.9 m

Electrical system

Nominal power 3,400 kW
Nominal voltage 580 V
Nominal frequency 50 Hz
Generator Asynchronous generator (squirrel cage rotor)
Generator protection class IP 54
Converter type Full scale converter with direct voltage intermediate circuit

Sound power level

Maximum sound power level 104.5 db (A)

Power curve

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

Title File Size
Technical overview 3.4M122 NES PDF 249 kB
Senvion - 3.XM series PDF 2.2 MB
Senvion - Portfolio Overview PDF 2.1 MB

Contact us

Senvion Sales

Überseering 10
22297 Hamburg

Phone: +49 40 5 55 50 90-0
Fax: +49 40 5 55 50 90-39 99