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) |
| IEC Level |
IEC IB |
| 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 |
| Rotor diameter［m］ |
130 |
| Swept area［㎡］ |
13300 |
| Blade Number |
3 |
| Rotor tilt［°］ |
6 |
| Rotor cone angle［°］ |
5.5 |
| Blade |
| 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 |
| Generator |
| 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 |
| Converter |
| 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 |
| Tower |
| 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 |
