The control of power - trim TM is based on
1. The controller works to ensure that the blade pitch is adjusted to the optimal position for the current conditions.
2. Measurements of wind speed and temperature are used to determine the power level of the wind turbine.
3. The actual power achieved is compared to that expected.
4. The blade pitch is adjusted to give the expected power level thereby correcting for both air density variation and any blade contamination.
5. The 950 KW rated power is attained regardless of air density and contamination.
6. Tha blade pitch position is typically reviewed every 30 minutes.
7. High power correction: Immediate blade pitching action is taken in order to avoid high power levels.
8. In case of any manlfunction in the pitch system the tubine continues operating as a passive stall regulated turbine and the blade pitch is held in its current position.
9. Any loss of power or control causes a fail-safe shutdown of the turbine using the tip brakes. The power-trim system has no active role during safety system shutdown.

	Brake system Blade tip air brake Disc brake	Hydraulic, fail-safe 1 psc. Hydraulic, fail-safe
	Drive train Grear type Ratio Main shaft Main bearing Cool	Planetary - parallel axle 1:67.5 (1:81.0 - 60 Hz) Forged shaft and flange Spherical roller bearing Heat exchanger with pump
	Generator Type Nominal voltage Nominal frequence Name plate rating Cooling	Asynchronous, 4-6 pole 690 V (600 V - USA) 50 Hz (60Hz - USA) 950/200kw Liquid - cooled with pimp
	Yaw system Type Drive mechanism	Sliding bearing 3 electrical planetary gears
	Tower Type Hub mechanism	Conical, steel, painted Accoding to type approvals
	Controller Type Cut-in system Phase compensation Remove control	Computer controlling Soft with thyristors Generator no load, Compensation By modem
	Sensors RPM sensors Temperature sensors Vibration sensors Meteorology Hydraulic systems	Rotor, generator, yaw system Grear, generator, controller, ambient Nacelle, rotor Anemometer, wind vanes Pressure transducers
	Lightning protection According to standard Blades Nacelle	IEC 1024 class 1 Receptor in the blade tips Air rod