But it can be done a lot to overhead lines to make bird safer.
Risk to birds on overhead lines
In high-voltage lines, the distances between the phase conductors and the drooping Isolierketten contrast is so great that no short-circuit danger. Low-voltage pylons also pose no great danger, because the feathers protect birds from electric shocks at low voltages.
2. Death through approach
Scientific research has shown that over 70% of the injured die in Germany storks by collisions with overhead lines. Large birds are currently on approach in the field of high voltage lines at particular risk. Most birds collide with the earth wire, which runs as a single rope from top of the mast to mast top and is therefore very poorly perceived by birds.
Habitat of birds (scarecrow effect): 141ha
Birdstrike victims per year: 2,600
Birdstrike victims per year in
Using Birds marks: 260
Impact Singlesided mast:
Habitat of birds (scarecrow effect): 67ha
Birdstrike victims per year: less than 2,600 bird strikes victims per year for the use of Birds markers: less than 260
(Monitoring since 1993)
||Electr. or Approach
birds of prey
Crane and Great Bustard
Waders and Gulls
Songbirds without corvids
Citation: Dieter Haas / Bernd Schürenberg
Dieter Haas, Bernd Schürenberg: Electrocution of birds: "Principles and Standards for the protection of birds on overhead lines"
GEO: "Nature conservation analysis of coastal power lines"
R & D Project FKZ 806 82 070
- The most dangerous of the existing structure types of medium voltage masts should be dispelled with reference to the prior art, the protection of birds on overhead lines.
- Recommendation of underground cabling, especially in areas of particular ornithological importance in protected areas and in areas of the ecological network NATURA 2000
- Conductors should be placed at a level arrangement. Particularly dangerous power lines should be marked with clearly visible markings.
- In important bird areas in route planning alternative routes should be examined, at least one-year ornithological studies to be carried out (Day / Night).
- To risks by means of electricity pylons and collision risks in all Member States will provide extensive data are collected.
"For the protection of bird species new to build masts and technical components of medium voltage lines are designed in such as, that birds are protected from Sromschlag. An existing masts and technical components of medium-voltage cables with a high risk to birds are within ten years of the measures needed to Protection against electric shock to perform. "
"The crossmember, insulator holders and other components of the overhead power lines must be constructed so that no birds seating in the dangerous proximity of the live conductor is given."
Solutions to prevent death by electrocution
- Insulator assemblies duch their distances from earth or seating Shorts for birds exclude
- Wood Pole (rare earth faults)
- Dangle poles (at least 600mm down). For large birds (storks and large birds of prey) should be at least 750mm pure isolation track.
- Tension towers with long rod insulators of >600mm insulator length of underpasses middle rope with suspension insulator, a triangular arrangement of isolators (in 3 levels) with >350mm distance of the upper rope to the top of the mast
Solutions to prevent approach to power lines
2. Wire Marker - RIBE
3. Acoustic Bird Control Systems
- with / without automatic activation control
- Placement of bird hoods on overhead lines, and live. The method does not require shutdown of medium voltage overhead lines and has been specially designed for the retrofitting of existing overhead lines. Our workers protect themselves from danger and isolation by distance. The work is performed in accordance with applicable laws, regulations and technical rules.
- Attachment of line markings (Scarefly / Firefly, RIBE Lasch bundle) via basket or helicopter. The line markings can be installed depending on the local situation is limited only to the neutral conductor.