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Siemens SWT-4.0-120

Onshore/Offshore Offshore
Wind class IEC IA
Rated power 4,000 kW
Cut-in wind speed 3-5 m/s
Nominal wind speed 13-14 m/s
Cut-out wind speed 32 m/s (with High Wind Ride Through feature)
Maximum 3s gust 70 m/s (IEC version)
Gearbox type 3-stage planetary/helical
Hub Nodular cast iron
Main bearing Spherical roller bearing
Main shaft Alloy steel
Nacelle bed plate Steel
Type 3-bladed, horizontal axis
Position Upwind
Rotational speed 5-14 rpm
Number of blades 3
Rotor diameter 120.00 m
Swept area 11,310 m2
Airfoils NACA, FFAxxx
Blade length 58.50 m
Blade type B58
Blade material GRE
Blade surface gloss Semi-gloss, < 30 / ISO2813
Blade surface color Light grey, RAL 7035
Rotor tilt 6 degrees
Root chord 4.20 m
Air brake Full-span pitching
Aerodynamic brake activation Active, hydraulic
Type Cylindrical and/or tapered tubular
Hub height 90.0 m
Corrosion protection Painted
Surface gloss Semi-gloss, 25-45, ISO2813
Color Light grey, RAL 7035
Gear system
Coupling hub - shaft Flange
Coupling shaft - gearbox Shrink disc
Gearbox ratio 1:119
Gearbox lubrication Forced lubrication
Oil volume Approx. 750 l
Gearbox cooling Separate oil cooler
Gearbox designation PZAB 3546
Gearbox manufacturer Winergy AG
Coupling gear - generator Double flexible coupling
Generator type Asynchronous
Generator - Protection class IP 54
Generator - Cooling system Integrated heat exchanger
Generator - Insulation class F
Control & Safety
Mechanical brake system Hydraulic disc brake
Mechanical brake - Position High speed shaft
Mechanical brake - Number of callipers 2
Yaw system Active
Yaw bearing Internally geared ball bearing
Yaw drive Six electric gear motors
Yaw brake Active friction brake
Control Pitch regulation with variable speed
Controller type Microprocessor
SCADA system Web WPS
Controller designation WTC 3
Dimensions & Weight

Power coefficient



Siemens AG. Technical specifications - Wind Turbine SWT-4.0-120. URL: [Date Accessed: 21/01/2018].