Technical Data
The N29/250 kW wind turbine is a further development of the N27 wind
turbines. With its large rotor diameter it is extremely well suited for projects at any
location.
| Rotor |
|
Type
|
3-bladed, horizontal axis, upwind |
| Rotor diameter |
29,7 m. |
| Swept area |
693 m2 |
| Power regulation |
Stall |
| RPM |
39,5 / 29,5 RPM |
| Cut-in / cut-out wind |
3-4 / 25 m/s |
| Nominal output at |
15,5 m/s |
| Survival wind speed |
55 m/s |
| Calculated life time of turbine |
20 years |
| Gear |
|
| Type |
3 stage helical |
| Material |
Ductile cast iron |
| Manufacturer |
Flender or similar |
| Nominal load |
275 kW |
| Ratio |
1:25,422 |
| Oil-quantity |
180 l. |
| Blades |
|
| Manufacturer |
LM, or similar |
| Blade length |
13,4 m. |
| Material |
Fibreglass reinforced polyester |
| Length of blade tip |
2.090 mm. |
| Generator |
|
| Nominal power |
250 / 45 kW |
| Type |
Asynchronous, double wound |
| Synchronous speed |
1000 / 750 RPM |
| Protection classification |
IP 55 |
| Yaw system |
|
| Type |
Active yawing, hydraulically |
| Yaw control |
By windvane |
| Yaw rate |
0,57o pr. second |
| Controller |
|
| Type |
Microspeed based |
| Grid connection |
Via soft-power controller |
| Remote communication |
Included |
| Braking system |
|
| Aerodynamic, type |
Pivotable blade tips |
| Aerodynamic, activation |
Hydraulic |
| Mechanical, type |
Hydraulic disc brake |
| Mechanical, location |
On high speed shaft |
| Number of brake calibers |
2 |
| Time to stop rotor from max. RPM |
App. 3 sec. |
| Towers |
|
Type
|
Tubular (cone-shaped) or lattice |
Tower heights
|
30, 40 or 50 m. tubular or lattice |
Corrosion protection
|
Tubular: Sandblasted and painted with 250 my
epoxy-paint. Lattice: Hot dip galvanized. |
| Weights |
|
| Nacelle, excl. rotor and hub |
12,5 t |
| Rotor incl. hub |
4,3 t. |
| Gearbox |
6,5 t. |
| Generator |
1,8 t. |
| Tower, 30 / 40 / 50 m. tubular |
15 t. / 25,5 t. / 33 t. |
| Tower, 30 / 40 / 50 m. lattice |
12,5 t. / 17 t. / 23 t. |
| Data might change due to continuous
development |
|
