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LTW 77-1.5
 
Specification
Generator
Construction Direct drive synchronous generator Permanent magnets
Rated power 1575 kW
Rated voltage 650 V
Protection class IP55
Control and safety system
Main brake Aerodynamic, pitch 3 independent drives
Service brake Electrical
Rotor lock Hydraulic
Remote control Leitwind SCADA
Power electronic
Converter type 4Q-IGBT
Rated power and frequency (grid-side) 3 ~ 690 V + -10% 50 Hz
Power factor (grid-side) 0.9 ind - 1 - 0.9 cap, adjustable
Design Data
Hub height 65 / 80 m
Rated power 1500 kW
Tower Conical steel tower
Cut-in wind speed 3 m/s
Cut-out wind speed 25 m/s
Yaw control system Active, electrical
Wind class IIA according to IEC 61400-1 
IIIA according to IEC 61400-1
Number of blades 3
Rotor diameter 77m / 80m
Swept area 4657 m²  / 5062 m 2
Rotational speed 18.2 rpm, variable
Blade material Fibre-glass reinforced/ polyester
Power and rotor speed control Pitch
 
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