When is a wind farm considered an extensive object for obstacle lighting purposes?

A wind farm, defined as a group of two or more wind turbines, is regarded as an extensive object when lighting is deemed necessary.

What is the requirement for flashing lights within a wind farm?

Where flashing lights are used, they should flash simultaneously throughout the wind farm.

CS ADR-DSN.Q.851 Marking and lighting of wind turbines

Q: What are the marking requirements for the rotor blades, nacelle, and upper part of the mast of a wind turbine considered an obstacle?

The rotor blades, nacelle, and upper 2/3 of the supporting mast of wind turbines should be painted white, or if after a safety assessment it is determined that another colour will improve safety, that other colour may be used.

Q: How should lights be installed to identify the perimeter of a wind farm?

Lights should be installed to identify the perimeter of the wind farm, respecting the maximum spacing in accordance with CS ADR-DSN.Q.846(i) between the lights along the perimeter, or if after a safety assessment it is determined that a greater spacing can be used.

Q: What must be done for wind turbines of significantly higher elevation within a wind farm?

Within a wind farm, any wind turbines of significantly higher elevation should also be identified wherever they are located.

Q: What lighting is required for wind turbines of less than 150 m in overall height?

For wind turbines of less than 150 m in overall height (hub height plus vertical blade height), medium intensity lighting should be installed on the nacelle.

Q: What additional lighting is required for wind turbines from 150 m to 315 m in overall height?

In addition to the medium intensity light on the nacelle, a second light serving as an alternate should be provided in case of failure of the operating light; the lights should be installed to assure that the output of either light is not blocked by the other.

Q: What intermediate level lighting is required for wind turbines from 150 m to 315 m in overall height?

An intermediate level at half the nacelle height of at least three low intensity Type E lights, as specified in CS ADR-DSN.Q.846(c), that are configured to flash at the same rate as the light on the nacelle. Low-intensity Type A or B lights may be used if a safety assessment shows that low intensity Type E lights are not suitable.

Navigate / EASA

Ask question Discover more Add to collection

CS ADR-DSN.Q.851 Marking and lighting of wind turbines

ED Decision 2016/027/R

(a) Applicability: When considered as an obstacle a wind turbine should be marked and/or lighted.

(b) Marking: The rotor blades, nacelle and upper 2/3 of the supporting mast of wind turbines should be painted white, or if after a safety assessment, it is determined that other colour will improve safety.

(1) Where lighting is deemed necessary for a single wind turbine or short line of wind turbines, the installation should be in accordance with paragraph (c)(2)(v) below, or as determined by a safety assessment.

(2) When lighting is deemed necessary in the case of a wind farm (i.e. a group of two or more wind turbines), the wind farm should be regarded as an extensive object and lights should be installed:

(i) to identify the perimeter of the wind farm;

(ii) respecting the maximum spacing, in accordance with CS ADR-DSN.Q.846(i), between the lights along the perimeter, or if after a safety assessment, it is determined that a greater spacing can be used;

(iii) so that, where flashing lights are used, they flash simultaneously throughout the wind farm;

(iv) so that, within a wind farm, any wind turbines of significantly higher elevation are also identified wherever they are located; and

(v) at locations prescribed in (i), (ii) and (iv):

(A) for wind turbines of less than 150 m in overall height (hub height plus vertical blade height), medium intensity lighting on the nacelle;

(B) for wind turbines from 150 m to 315 m in overall height, in addition to the medium intensity light installed on the nacelle, a second light serving as an alternate should be provided in case of failure of the operating light; the lights should be installed to assure that the output of either light is not blocked by the other;

(C) in addition, for wind turbines from 150 m to 315 m in overall height, an intermediate level at half the nacelle height of at least three low intensity Type E lights, as specified in CS ADR-DSN.Q.846(c), that are configured to flash at the same rate as the light on the nacelle; low-intensity Type A or B lights may be used if an safety assessment shows that low intensity Type E lights are not suitable.

(3) The obstacle lights should be installed on the nacelle in such a manner as to provide an unobstructed view for aircraft approaching from any direction.

[Issue: ADR-DSN/3]

Details

Source-Title: CS ADR-DSN.Q.851 Marking and lighting of wind turbines View latest amendments

Erulesid: ERULES-1963177438-2324 Compare versions

Domain: Aerodromes

Activitytype: Aerodrome operations, Aerodrome design, Manufacturing

Amendedby: CS Issue 3

Applicabilitydate: 15 December, 2016

Entryintoforcedate: 14 December, 2016

Icaoreference: Annex 14, Volume I

Regulatedentity: Aerodrome operator, Aerodrome design organisation, Aerodrome equipment manufacturer

Regulatorysource: ED Decision 2016/027/R Navigate

Regulatorysubject: CS-ADR-DSN

Technicalsubjectmatter: Obstacles

Typeofcontent: CS (Certification specification)

Easacategory: Non-instrument runway, Non-precision approach runway, Precision approach runway Category I, Precision approach runway Category II, Precision approach runway Category III, Take-off runway

Origin: EASA

Category: EAR

CS ADR-DSN.Q.851 Marking and lighting of wind turbines

Details

Related sections: