Performance
Maximum electrical output: 525 kW (continuous rating)
Cut-in/cut-out wind speed: 4 / 25 m/s
Rated wind speed: 16 m/s

Rotor
Number of blades: 3
Operation: upwind
Diameter: 36m
Rotational speed: 31rpm
Swept area 1018 m2
Hub height: 41m
Rotational direction: clockwise
Tip speed: 58 m/s
Hub type: Rigid, bolted flange
Hub material: cast steel
Blade tip angle: minus 2°
Angel of tilt: 6
Power control: stall		 Yaw system
Activated: 2 hydraulically driven planetary gears
Yaw brake: 2 calipers hydraulically activated
Yaw speed: 0.6 °/sec
Friction bearings of polyamid

Tower
Type: conical with a diameter of 3m at the base to 1.8 m at the top, 4 sections assembled by bolted flanges
Height: 40 m
Material: steel
Coating: painted

Mechanical brake
Disk brake with two calipers
700 mm diameter disk on high speed shaft; acting when the rotor speed reaches 30 % of the nominal power; calipers hydraulically activated.
The mechanical brakes are designed for nominal torque.
Blades
Manufacturer: LM
Material: Glassfiber reinforced polyester
Blade length: 17m
Profile: NACA 63-2 and 63-4
Survival wind speed: 67m/s
Tip length: 2.6 m
Air brakes: tip spoiler
Tip release control: hydraulic

Transmission
Manufacturer: Renk Tacke or similar
No. of stages: 3 axial
Ratio: 1:48.8
Fixed: rigid on the nacelle bedplate
Main shaft diameter: 450 mm

Generator
Manufacturer: ABB or similar
Type: HXR 355, induction
Voltage: 400 V triangle connection
Rated output: 525 kW
Insulation class: F
Synchronous speed: 1500 rpm
Frequency: 50 Hz
Rated current: 830 A
Protection: IP 54
 Control system
Manufacturer: West Control or similar
Type: logic system with microprocessor
Cut-in system: thyristor
Generator voltage control with thyristors at low loads
Software language: C
Sensors: wind speed, wind direction, generator shaft speed, temperatures (generator, gear box, thyristor), pressure in the hydraulic system, vibration, electrical data
Protection limits:
Generator winding temperature: 145 oC
Gear box oil temperature: 80 oC
Thyristor temperature: 60 oC

Weight summary
Blades: 3 x 1600 kg
Hub: 3 tonnes
Transmission: 16 tonnes
Nacelle, bedplate and auxiliaries: 6 tonnes
Generator: 2 tonnes
Total of tower head: 32 tonnes
Tower: 26 tonnes
Total, above ground: 58 tonnes

 

This page was revised 17th of May 1999.

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