Focussed on medium and low wind regimes
Much of the world's turbine demand is in low-medium wind areas (IEC class II and III). EWT's turbines are designed to maximise yield from such sites relative to other turbines in our capacity range. This enables wind project owners to achieve high yields and therefore more attractive financial returns, even at sites with low wind conditions.

EWT’s DIRECTWIND  500kW turbine is being offered with a 52m and 54m rotor diameter in order to optimise its performance with wind speeds classified under IEC class IIA and IIIA, respectively. 

 

Specifications

Type	DW 52 / 54
Rotor diameter	51.5 / 54 m
Variable Rotor Speed	12 - 24 rpm
Nominal Power Output	500kW
Cut-in wind speed	3 m/s
Rated wind speed	10 m/s
Cut-out wind speed (10 minute Average)	25 m/s
Survival wind speed	59.5 / 52.5 m/s

Power output control: pitch controlled variable speed. 

Options
EWT wind turbines can be delivered with a number of options:

• Aviation light
• Shadow flicker
• Ice detection
• Cold climate package
• Black blades
• Service elevator (75m)

Type Certificate
IEC 61400 wind class IIIA (DW 54)
IEC 61400 wind class IIA  (DW 52)

Drive system
Generator Synchronous air-cooled EWT-design, multi-pole, wound-rotor
Power converter Full-power, IGBT-controlled AC-DC-AC ‘back-to-back’ type.

Control System
Bachman PLC control system.
Possibility for remote access via TCP / IP internet and the DMS 2.0 * SCADA system.

Tower
Type Conical tubular steel, internal ascent
Hub heights 35, 40, 50 and 75 m.

Safety systems
Main brake action Individual rotor blade pitch (three independent brakes)
Fail-safe brake Individual rotor blade pitch by three independent battery-powered back-up units.

Leaflet.EWT500kW.pdf