4MW Series Wind Turbine

The 4MW wind turbine series was introduced by Siemens, the largest producer of turbines in the world. These offshore turbines are intended for large scale wind farms. The efficiency and power output of these windmills is outstanding and they boast an extremely long useful lifetime.

SWT 4.0-130 power curve
Technical specification
Operating data
Rated power[kw] 4000
Cut-in wind speed[m/s] 3.5
Cut-out wind speed[m/s] 32(Across High Wind Speeds)
The largest 3s wind[m/s] 70
Operating temperature(℃) -10~+40(Across High Temperatures)
standstill temperature(℃) -20~+50
Rotor speed range[rpm] 5~14
Rotor speed range[rpm] 12
Rated wind speed[m/s] 11-12
Life cycle[year] 20
Surface color Light gray RAL 7035
Rotor weight[t] 100
Hub weight[t] 47
Nacelle weight[t] 140
Rotor diameter[m] 130
Swept area[㎡] 13300
Blade Number 3
Rotor tilt[°] 6
Rotor cone angle[°] 5.5
Type B63
Blade length[m] 63.45
Aerodynamic configuration Siemens patent airfoil DU-97-W-300
Blade material GRE
Pitch System
type Hydraulic pith system
Pitch speed[°/s] 7
Pitch bearing four-point contact ball
Drive chain
connection Rotor hub-rotor shaft: flange;
Gearbox type 3-stage parallel / Helical
gearbox gear ratio 1:119
gearbox lubricating system force
gearbox oil[L] ~750
gearbox oil filter Split type oil cooling system
Cooler gearbox Oil-water-wing cooler
Type Squirrel cage asynchronous generator
Rated power[kw] 4250
Rated speed[rpm] 600~1800
rated voltage[v] 750
grid frequency[Hz] 50/60
insulation F
protection IP54
cooling air air cooler
type Four quadrant full power
apparent power[KVA] 4000
rated voltage[v] 690
grid frequency[Hz] 50/60
Switch-over PWM
type of cooling Water cooling
Yaw system
type Active yaw
yaw bearing Transmission ball bearing
yaw motor 6 sets with gear motor
yaw rate[°/min] 21.6(0.06 rpm)
Braking system
type The pitch type
Main braking Hydraulic variable propeller braking
Mechanical braking High-speed spindle hydraulic disc caliper brake
Loading components
Hub Nodular cast iron
Rotor bearing Spherical roller bearing
Rotor alloy steel
front chassis Nodular cast iron
back chassis steel
Spinner(Diversion cover) Steel/aluminum
type cylindrical
Wheel hub height[m] 90m or Customize based on the site
antiseptic anticorrosion painting
anticorrosion level Following the ISO12944 standards, according to the wind field environment.
barrel Structural steel
flange T or L
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