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Wind power is the most rapidly growing form of renewable energy in the world. Lightning & Surge Technologies can provide comprehensive solutions for the wind energy industry, including grounding and bonding products, low-voltage components, surge protection products and lightning protection products that meet or exceed the engineered requirements of the largest wind turbine manufacturers.

Wind Power




Wind Turbine
Receptors
Important factors include:
Blade material and manufacturing process
Ease of receptor installation and insulation requirements
Attachment method to lightning protection conductor
Attracting the lightning strike to a preferred attachment point
Field serviceability

Conductors
Designed and manufactured to meet specific criteria for effective and reliable conduction, lightning conductors should have:
Low inductance per unit length and low surge impedance
Current-carrying capability to withstand, without degradation, the thermal and mechanical effects of lightning
Resistance to environmental effects and mechanical fatigue

Conductors offered include:
Aluminum, copper and stainless steel
Insulated and non-insulated
Solid and woven conductors in both flat and rounded configurations

Earth Rods
ERICO is the world’s largest manufacturer of copper-bonded steel earth rods and offers a wide range of accessories. ERITECH® brand of copper-bonded ground rods exceed the requirements of ANSI®/UL. They are also highly corrosion resistant and provide at least a 30-year service life in most soils.

Ground Enhancement Material (GEM)
GEM is a low-resistance carbon concrete that improves grounding effectiveness in areas of poor conductivity. GEM is ideal for wind turbine foundations where limited space makes adequate grounding difficult by conventional methods.
Connections
Blade lightning protection connections may range from a CADWELD® welded connection to a mechanically bolted connection.
Considerations include:
Lightning protection conductor material
Resistance to vibration and corrosion
Material impedance
National/international standard requirements
Costs and benefits

Exothermically Welded Connections
The CADWELD® molecular bonding process is superior in performance to any known mechanical or compression-type surface-to-surface contact connector. By virtue of the molecular bond, CADWELD connections provide current carrying (fusing) capacity equal to that of the conductor and will not deteriorate with age.

CADWELD connections are UL® Listed and satisfy IEEE® (Standard for Permanent Connections Used in Substation Grounding).

Foundation Earthing and Construction
Site location is critical to capture the wind and often involves areas of high soil resistivity. The increasing height of newer wind turbines enhances the threat of lightning strikes. Proper design and integrity of a earthing grid facilitates long-term safety and operation of any wind turbine site during both lightning and fault current events.

Wind turbine earthing system design has to meet three main criteria:
Satisfy the step-and-touch potential requirements regarding the safety of personnel
Provide sufficient earth reference potential to assure proper functionality of electrical equipment
Effectively dissipate the lightning energy
 

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