Prevention and protection against lightning ingesco. History and modern approaches department of electrical and computer engineering university of florida, gainesville 86th ams annual meeting 2nd conference on meteorological applications of lightning atlanta, georgia, january 29 february 2. The standards in the united states for lightning protection systems are the national electrical code nec, the national fire protection association 78, lightning protection code nfpa 78, and underwriters laboratories 96a, standard for installation requirements for lightning protection systems, ul 96a. Professionally installed lightning protection systems are the best way to reduce the likelihood of a lightningcaused fire. Conductors air terminals bases cable holders bonding equipment splicers through roof wall grounding surge protection ornaments fasteners. Earthing grounding rod lightning protection system. The equipment and systems used for lightning protection are required to comply with the national. Lightning protection system design and installation. All bsi british standards available online in electronic and print formats.
How to ensure continuity of service and avoid economic losses in case of lightning strike. Consideration of protection angle method and lightning. Lightning protection initially as part of an nfpa task force, since disbanded assembled for the purpose of responding to the nfpa standards committee decision 0030, specifically the request for technical substantiation of the lightning protection techniques and practice contained in modern lightning protection standards. Each chemrod creates an optimal electrical connection to earth with a large conductive surface for enhanced grounding rod lightning protection.
How to protect the infrastructure of a data center. The importance of lightning protection 6 7 key considerations identifying the need for both external and internal lightning protection for effective cover against lightning strikes technical design service 8 9 not only do we supply lightning protection and earthing materials, we will also design the system you need. When correctly installed, the recommendations on this page and in this technical note give the user the best protection from the harmful effects of lightning. You can modify the impulse by lowering its intensity and lengggthening its duration. Lightning stock flushing density number of thunderstorm. Abstract the protection angle and protection rules for lightning flashes to the. Lightning and surge protection basic principles 1 introduction rarely does the power of nature strike an observer more forcibly than the sight for the first time of a. Lightning protection, lightning conductors, climatic hazards, climatic protection, lightning, electrical safety, electric shocks, hazard prevention in buildings. This is accomplished by attaching a series of copper cables to the trees highest branches and then grounding them a safe distance from the tree. No more complicated calculations with dehnsupport toolbox 2. In both cases, this recommendation provides the procedures for the design and installation of the lightning airtermination system, down. Energy is divided and shared by a distributed ground connection. Lightning protection 1 this guide applies to tplink rackmountable devices. A lightning protection system provides a network of low resistance paths to intercept, in a safe manner, lightnings dangerous electricity and direct it to the ground without any impact to a structure or its occupants.
Lpi started promoting lightning protection education, awareness and safety in 1955. Ds202de dehn uni earthing clamp saddle clamp pdf only. Building lighting protection calculation excel september 20, 2015 16 comments. Rakov neither data nor theory supports claims that lightning elimination and early streamer emission techniques are superior to conventional lightning protection systems affiliation. Thousands of trees are struck by lightning every year. The lightning protection installer shall be responsible for marking the roof with all conductor andor pad locations. Ingesco specializes in the production and design of lightning rod protection, surge arresters and prevention products. Knowing lightning and surge protection terminology, abbreviations, signs and symbols, knowing what is lightning and types of lightning flashes, knowing what is the lightning protection systems lps, types and components, knowing the correct choice of lightning protection system components. Calculate no of down conductor for lightning protection area of building structure. In addition to these, there may be legislation or rules of each country that must be taken into account. The diameter of main earthmat conductor and risers for extended portion shall be identical to the existing one. It provides a comprehensive and personalized service. Fundamentals of lightning protection systems page 1 of 14 fundamentals of lightning protection systems, edition 1c september 2011. Lightning protection quiz questions electrician exams.
Poor grounding practice can be the cause of continual and intermittent difficulttodiagnose problems in a facility. The chemrod grounding rod solves problems found with conventional grounding rods by requiring less real estate and fewer electrodes to meet specified resistance. Lightning protection systems with nonradioactive ionization device. Installations not directly related to those areas and structures housing such installations can be protected against lightning by the provisions of this standard. Understanding lightning and lightning protection helps the reader to understand the propagation of waves within complex intelligent structures within buildings, and the operation of systems designed to protect these structures. Lightning protection consultant handbook erico is dedicated to providing a costeffective lightning protection solution for any given application. Xdsgfs12001r2 earthing and lightning protection uncontrolled when printed page 3 of 37 xdsgfs12001r2 10 notification of changes 35 11 tests 35 12 documentation to be submitted 36 12. Lightning protection, as1768, in 2007, and presently under revision. The basis of conventional lightning protection technology.
Calculate lightning protection for building structure. These trees will have varying degrees of damage ranging from complete shattering and destruction of the tree, to a slow lingering death, to virtually no apparent damage at all figure 1. Obo bettermann is one of the worlds most experi enced manufacturers of lightning and surge protec tion systems. State of the art for the installation of lightning protection systems 0. Bonding, grounding and surge protection by richard kithil, president and orlando alzamora, vicepresident national lightning safety institute nlsi 1. Lightning protection for facility operational continuity requires attention to combinations of.
Understanding lightning protection by bill laudeman reprinted with permission from seaworthy, the boatu. Lightning protection principles knowledge of the mechanism of the lightning discharge enables an understanding of the way in which lightning detection and warning systems operate. We develop and manufacture these components so installation specialists can effectively protect businesses and homes. Optimization of economic, environmental and safety aspects article pdf available in environmental engineering and management journal 148. All books are in clear copy here, and all files are secure so dont worry about it. Lightning damage is not covered under the motorola warranty. Calculate whether lightning protection is required or not for following building.
On completion of the installation the following isolated and combined testing measurement and or checks has to be made and the results recorded in a lightning protection system checklist the resistance to earth of each local earth electrode and in addition the resistance to earth of the complete earth termination system. To prevent lightning damage to special trees in your yard or community, a lightning protection system may be installed. The substation earthing layout design shall identify lightning spire and lightning shield wire placement whilst maintaining the required access and safety clearances in. The lightning protection industry began in the united states when benjamin franklin postulated that lightning was electricity, and a metal rod could be used to carry the lightning. Design of lightning protection systems dehnsupport toolbox software. The specialty concepts lightning protection unit lpu is a rugged, high capacity system component designed to reduce the damage to photovoltaic systems caused by lightning induced tran sients. Many decades of experience shows that by combining franklin rods located at critical points on a structure with a proper down conductor and grounding system the damage due to lightning could be reduced significantly 1. This report investigates the discharge mechanism and discusses the principles of lightning protection and the way this is applied to the protection of structures. Comparative study on substation shielding due to direct. Now the third revised edition of the english lightning protection guide is available.
Erico manufactures, using the eritech trade name, lightning protection systems in full accordance with more than twelve national and international standards, as well as nonconventional systems for applications where these. If lightning strikes the tree, the current flows down the cables and safely to. Lpu lightning protection unit specialty oncepts, inc. To identify if your device is rackmountable or not, check the ig installation guide of the device. The lightning protection international standard prof. Lightning protection products thompson lightning protection. Its membership is comprised of engineers, manufacturers, contractors, scientists, architects, and safety directors. Electrical code, nfpa 70 and installation requirements. Understanding lightning protection specialist course overview lightning can have a devastating effect on power supply assets, damaging buildings, power structures, communications and other essential equipment yet this damage can be easily, and costeffectively, avoided.
The lightning protection institute is a nationwide notforprofit organization founded in 1955 to promote lightning protection education, awareness, and safety. Impulse protection you cannot stop a large ilimpulse with a silingle lightning arrestor in most cases. Marine insurance and damage avoidance report over the past couple of hundred years, as science has learned more about the nature of nature, lots. It is designed to be installed in series between the solar array and the rest of the system, close to the system control electronics, to allow it to. It also comments on proper human behaviour during a lightning thunderstorm. Once the need for lightning protection has been established, loss of life and property can be avoided by the installation of an approved lightning protection system. Copper lightning protection materials shall not becopper lightning protection materials shall not be installed on aluminum roofing, siding or otherinstalled on. The capturing device with its supporting mast and fixings.
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