WES 30/250

WES 250

Introduction

The WES250 is a two bladed, high performance, reliable midsize 250kW wind turbine with a rotor diameter of 30 meters.The mechanical part of the WES250 is based on the original, proven design from 1983. For the electrical parts providing power conversion and control, the latest technology is used.

WES250 turbines are manufactured and exported by WES in the Netherlands, and are sold, installed and maintained all over the world by a global network of certified and trained dealers.

Powercurve

Specifications

WES 250 GENERAL

Supplier/manufacturer	WES BV
Life expectancy	>20 years
Maintenance	Twice a year
Rated power	250 kW
Cut in wind speed	<3 m/sec. (6.7mph)
Cut out wind speed	25 m/sec. (56mph)
Rated wind speed	13 m/sec. (29mph)
Survival wind speed	60 m/sec. (134mph)
Passive power regulation	Pitching (blade-angle adjustment)
Active power regulation	Fully variable back-to-back IGBT system
Noise emission at 8 m/s	45 dB(a) at 100m
Operating temperatures	From -20°C up to +40°C

WES 250 APPLIED STANDARDS

Degree of protection	IP55
Standards	NEN1010 (electrical) NEN-EN50308 (safety) NEN-EN6096 (wind turbines) UL1741 (anti islanding) NEN-EN-IEC 60204-1 (cabinet)
CE-mark	Yes

WES 250 ELECTRICAL

Grid voltage	400V ±10%
Grid frequency	50/60Hz ±3Hz
# Phases	3 phase + neutral
Specific power	354 W/m2
Converter type	Back-to-back IGBT converter

WES 250 ROTOR AND BLADES

Number of blades	2
Diameter	30 m
Position	Upwind
Direction	Clockwise
Angle of the main shaft	7° with horizontal
Swept area	707 m2
Speed	Variable 35 -75 rotations per minute
Power regulation	Passive pitching (blade-angle adjustment)
Min. blade-angle	1
Flapping angle	183 -170,5°
Blade length	13,4 m
Weight (1 blade)	315kg
Chord	500 – 1.200mm
Twist	15°
Mounted	Flexible

WES 250 GEARBOX

Brand	Siemens (Flender)
Number of stages	2
Weight	1850kg (incl. oil)
Ratio	1:26,60

WES 250 GENERATOR

Brand	ABB
Type	A-synchronous
Nominal power	250 kW
Number of poles	6
Nominal voltage	230/400 volt
Frequency	Variable: 25 – 75 Hz.
Weight	1.320kg
Protection	IP 55

WES 250 TOWER

Type	Tubular
Number of sections	3 or 4
Tower height	30, 39, 48m
Material	Painted steel
Location ladder	Internal

WES 250 CONTROLLER

Control by	IPC (Beckhoff)
Remote monitoring	Yes
Data logging	Optional

WES 250 YAW-SYSTEM

Yaw system	Active
Signal from	Wind vane
Driven by	Electro motor with worm-wheel reduction
Power yaw-motor	2x 1,5 kW
Yaw speed	0,77°/sec.
Yaw bearing	Single ball bearing; externally geared (Rothe Erde)
Yaw-brakes	Constant friction-brakes; 4 pcs.

WES 250 SAFETY

First safety system	Passive blade pitching
activated by:	rotor speed (70 rpm)
Second safety system	Yawing out of the wind
activated by	Rotor speed (>90 rpm)
	Excessive vibrations
	Failure anemometer or wind vane
	Grid failure
	Fault in yawing system
Blocking system
Rotor blocking system	Pin in high speed shaft; for service purposes
Activation	Manual