WIND TURBINES

Wind Turbines Applications

A single wind turbine or wind turbine farms, which has the potential to endanger aviation in navigable airspace or has the potential to interfere with the operation of navigation, should be lighted.

BASIC RULES

  • The number of light levels recommended depends on the height of the structure;
  • The obstacle lights should be installed on the  nacelle to provide an unobstructed view for aircraft approaching from any direction;
  • Obstruction lights are applied to identify the perimeter of the wind farm;
  • The diameter of the structure determine the number of lights installed at the top and at each obstruction light level.
Aviation obstruction system wind turbine

LIGHTS SPECIFICATIONS

When lighting is deemed necessary, medium-intensity obstacle lights should be used.

In the case of a wind farm, i.e. a group of two or more wind turbines, it should be regarded as an extensive object and the lights should be installed:

  • to identify the perimeter of the wind farm;
  • respecting the maximum spacing of 900 m, between the lights along the perimeter, unless a dedicated assessment shows that a greater spacing can be used;
  • so that, where flashing lights are used, they flash simultaneously; and
  • so that, within a wind farm, any wind turbines of significantly higher elevation are also identified wherever they are located.

AVIATION OBSTRUCTION LIGHT MARKINGS

There is 3 option for lighting a wind turbine with aviation obstruction light systems.

  1. If the wind turbine is to be lighted only at night with red light
    • If the authorities state that there is no need to light the day
    • If the wind turbine marked with paint (white-red strip)
  2. If the wind turbine is to be lighted day and night with white light
  3. If the wind turbine is to be lighted with white light at daytime and with red light at night time
    • If the authorities state that white light is too much discomfortable at night

1 – IF THE WIND TURBINE IS TO BE LIGHTED ONLY AT NIGHT

HEIGHT N° OF LEVELS
H ≤ 45m Only one level: Low intensity
 

45m < H ≤ 105m

2 levels:

Top level: Medium intensity – B Type;

Intermediate level: Low / Medium intensity – B Type.

 

 

105m < H ≤ 210m

4 levels:

Top level: Medium intensity – B Type;

First Intermediate level: Low / Medium intensity – B Type;

Second Intermediate level: Medium intensity – B Type;

Lower Intermediate level: Low / Medium intensity – B Type.

Number of Levels According to Height

tribune red aviation obstruction light

N° of lights depends on the diameter

turbine aviation obstruction light diameters

2 – IF THE WIND TURBINE IS TO BE LIGHTED DAY AND NIGHT WITH WHITE LIGHTS

Number of Levels According to Height

tribune white aviation obstruction light
HEIGHT N° OF LEVELS
H ≤ 105m Only one level: Medium intensity – A Type
 

105m < H ≤ 210m

2 levels:

Top level: Medium intensity – A Type;

Intermediate level: Medium intensity – A Type.

 

210m < H ≤ 315m

3 levels:

Top level: Medium intensity – A Type;

Intermediate level: Medium intensity – A Type;

Lower Intermediate level: Medium intensity – A Type.

3 – IF THE WIND TURBINE IS TO BE LIGHTED WITH WHITE AND RED LIGHTS

HEIGHT N° OF LEVELS
 

H ≤ 105m

2 levels:

Top level: Medium intensity – AB Type;

Intermediate level: Low / Medium intensity – B type.

 

 

 

105m < H ≤ 210m

4 levels:

Top level: Medium intensity – AB Type;

First Intermediate level: Low / Medium intensity – B Type;

Second Intermediate level: Medium intensity – AB Type;

Lower Intermediate level: Low / Medium intensity – B Type;

Number of Levels According to Height

tribune white red aviation obstruction light