basic parameters rated power(kw) 20 survivel wind speed(m/s) 45 max power(kw) 22 wind wheel diameterm(m) 10.22 rated voltage(v) 384/560 blade length(m) 4.82 rated revolution(r/m) 160 swept area(m2) 88.53 cut-in speed(m/s) 1 blade material FRP cut-off wind speed(m/s) 25 generator life 20 sone key technology control method adjust speed method pneumatic pitch  brake method mechanical generator generator configuration 3-phase 380/220v 50/60hz generator  type 3-phase permanent magnet  AC protect class IP54 blade technology resin is imported from american ashland,acuum slip casting, no bubble ,high strongth