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• T y <br /> . J r <br /> 2 VERSIONS LIGHTNING . j <br /> The standard V47-660 kW is a single PROTECTION <br /> • generator version, and highly efficient The V47-660 kW turbine is protected, <br /> under most wind conditions. However, from the tips of its blades to the base of <br /> 4.�+� Vestas con also supply a dual generator the tower, by the Vestos Total Lightning <br /> version. Up to wind speeds of 7 m/s this Protection. For more details, ask For our <br /> uses the smaller of the two generators, special brochure on Vestos Total Light- <br /> which means not only operating with a Hing Protection. <br /> reduced noise level in conditions where <br /> this is important, but also an efficient <br /> exploitation of winds of low speeds. <br /> OPTITIe . ‘. <br /> As with all turbines From ..\':. '-��''• <br /> Vestas, the r .: <br /> 660 kW is equipped with the micropro- 4°' •,sp-- <br /> cessorcontrolled OptiTip•pitch-regulation a•' - .: , <br /> • <br /> • <br /> system, which constantly regulates the :rzy4a.- ����� !` blades so that they are always tilted to <br /> / the optimal angle for current wind condi- 6 ;11,00r <br /> • .•s'0" <br /> tions. O till " "a� VA.,. <br /> p p makes it possible to find ,•.' ':yt a r e <br /> the right balance between moximum pro- ' h; s44. <br /> duction and minimum noise level. �'' <br /> •• w' .i" r j�yy� So <br /> III OPTISLIe <br /> ,, • t <br /> 4 . <br /> As mentioned above, the V47.660 kW r - <br /> turbine is fined with the unique OptiSlip• . <br /> generator system. The system allows both • t; .,,. : . r <br /> the rotor and the generator to vary their % • <br /> rpm by up to 10%during violent gusts of '"_'`'� .• . ,^ '' -- <br /> wind. OptiSlip•therefore not only mini- <br /> mises wear and tear on the turbine, but <br /> also improves the quality of the supply of FLEXIBLE BLADES <br /> electricity produced. <br /> Vestos always measures and runs tests <br /> on all of its products right down to the <br /> smallest detail before anything is relea- <br /> sed For general sole. The same approach <br /> CALCULATED POWER CURVE <br /> Effect(kW) AIR DENSITY 1.225 KG/M3 <br /> has been adoptedfor the flexible blades, <br /> which have been through a six-month <br /> • V47-660 kw V47:660/200 kw dynamic vibration test under extreme <br /> 700 strain. These test conditions reproduced <br /> 600 ..-- I a greater level of stress on the prototype <br /> ' <br /> 60turbine than would be exerted in o <br /> 0 <br /> 20-year active life. After this, the blades <br /> 400 I were tested in o static test in their poli- <br /> ° tion of maximum curvature and under <br /> 1,00 <br /> maximum strain. The prototype blades <br /> 200 j passed the various tests, allowing Vestos <br /> 100 i to start production of a new blade type <br /> 0 / that will go on to make a signiflcarrtt ' • • 1 <br />