Pitch Drive System for Improved Safety.

> The SETEC pitch system offers double safety on each rotor blade for 90 ° positioning.
>  The spinning-off of the rotor blades or a collapse of the wind turbine due to overspeed and imbalance will become unlikely.

The general function:

• During an undisturbed system, the special function is in standby mode. 
• If the standard system can not adjust the rotor blades, the safety function becomes fail-safe active, by a purely mechanical function.
  
• Releasing a rotational movement of rotor-blade  in direction of 90 degrees.
• In the case of a turn towards the work-poition the mechanically controlled function prevents from this rotation.

This means that extreme damage to the WT caused by pitch-drives malfunction can be avoided for a negligible additional cost.