Lightning Protection for Tower Telecomunication with DAS

DISSIPATION ARRAY SYSTEM ( DAS) TOTAL LIGHTNING PROTECTION : The Dissipation Array System prevents direct lightning strikes within the area of protection. REDUCE OPERATING COSTS : Protects against lightning damage, including fires, destroyed electronics, and downtime. RELIABLE : Our No-Strike warranty ensures complete protection on all LEC supervised installations. UNIVERSAL : Engineered to integrate with any building, tower, tank, stack or other structure. PROVEN : DAS technology has been in use since 1971, protecting thousands of sites worldwide Lightning Strike Prevention Lightning is nature’ s attempt to equalize the voltage between storm clouds and the earth. In order for lightning to strike, it must connect . Lightning is an electric discharge that attempts to equalize voltage between storm clouds and the earth. The difference in polarity between the bottom of the cloud and the ground is the charge differential. When this charge differential is high, the cloud begins to form downward leaders, and objects on the ground begin to form upward streamers. A leader then connects with a streamer, giving lightning the path it needs to exchange charge between the earth and the cloud, reducing the charge differential.to upward streamers, which reach up from earth-bound objects when the electrical field is strong enough. DAS interrupts the formation of these upward streamers through Point Discharge, a phenomenon where a well-grounded point exchanges ions between the air and the ground. Point Discharge becomes more efficient when the points are connected to a low-impedance grounding system, and more ions can be transferred with a greater number of points. DAS technology takes advantage of these principles with an optimal point configuration able to interrupt the formation of upward streamers, thereby preventing direct strikes. Lightning Protection Components The Dissipation Array System is a key component of your lightning protection system, working with grounding and surge suppression to achieve complete protection. A typical system includes: 1. The Dissipation Array, available in a range of configurations for almost any structure. 2. A low-impedance grounding system using chemically-charged electrodes ( Chem-Rod™ ) . 3. Transient Voltage Surge Suppression ( TVSS) to protect against transients traveling through data lines and other conductive paths. 4. Modular strike prevention devices ( SBI™ ) to supplement the Dissipation Array’ s area of protection as needed. Steps to Total Lightning Prevention 1. Analysis: During analysis, LEC consultants evaluate the site for factors that contribute to lightning events. Existing lightning protection systems are included in the evaluation. 2. Design: Engineers then specify system components, placement, and structural interfaces. Designs account for environmental factors such as wind, ice, and corrosion. 3. Installation: LEC offers installation supervision for all DAS installations. 4. Certification: LEC supervised installations receive our No-Strike warranty, with recertification available on a yearly basis. 5. Expansion: As your facility changes, LEC works with you to evaluate how your system is affected, ensuring uninterrupted protection... A History of Results DAS technology was introduced in 1971. Since that time, over 3, 000 systems have been installed worldwide, accruing over 40, 000 system years. Throughout this time, the DAS has maintained a success rate over 99% . Lightning Principles Lightning is an electric discharge that attempts to equalize voltage between storm clouds and the earth. The difference in polarity between the bottom of the cloud and the ground is the charge differential. When this charge differential is high, the cloud begins to form downward leaders, and objects on the ground begin to form upward streamers. A leader then connects with a streamer, giving lightning the path it needs to exchange charge between the earth and the cloud, reducing the charge differential.