40kW Wind Power
Small Industrial Sites, Small Communities and Municipalities Schools Commercial Farms or Remote Village Wind-Diesel Power Systems
The hub contains the device for varying the pitch of the blades. Contrary to most other small wind energy converters, the 40kW features the pitch control system of the blades giving the advantages of:
- Automatic restarting after grid failure
- No shutdown in strong winds
- Constant frequency in stand-alone operation
The tower is of octagonal tubular steel construction. The electronic safety and control devices together with relevant instrumentation are housed in a switch cabinet on the tower pedestal. This switch cabinet also contains the power terminals for connecting the 40kW to the grid or to the consumers load.
Turbine System
| Model | SURNRG 41-40 |
| Rated Kilowatt Output | 40kW |
| Cut-In Wind Speed | 3.7 m/s (8.3 mph) |
| Cut-Out Wind Speed | 50 m/s (112 mph) |
| Rated Wind Speed | 13.4 m/s (29.5 mph) |
| Max Design (Survival) Wind Speed | 50 m/s (110 mph) |
| Weight (lbs.) | 3,086 |
| Design Lifetime (yrs) | 20 |
Turbine Rotor
| Number of Blades | 2 |
| Orientation | Upwind |
| Axis (nominal) | Horizontal |
| Rotation | Counter Clockwise |
| Blade Material | GFRP |
| Rotor Diameter | 12.5 m (41 ft) |
| Swept Area | 1,320 ft² |
| Rotor RPM at rated output power | 100 rpm |
| Speed Control | |
| Normal Shutdown Brake | Centrifugal |
| Emergency Shutdown Brake | Electro-hydraulic power and speed control by pitch adjustment |
| Blade Pitch Control | Hydraulic speed control by pitch adjustment |
| Yaw Control | Active, electromechanically driven with wind direction / speed sensors and automatic cable unwind |
Generator
| Type | Single/Three phase induction generator |
| Voltage | 240/ 208/ 480VAC |
| Frequency (Hz) | 60/50 |
Transmission
| Type | Three-stage spur gear |
Brake System
| Type | Integrated disk brake |
Support Towers
| Type & Material | Lattice /Monopole |