Finally, the energy is dissipated through a system of ground terminals electrodes. In order to design an effective lightning protection system with franklin rods or capturing meshes, the following rules shall apply. Obos research and development activities received a boost in 1996 with the opening. Bonded lightning protections pdf document downloads. The standard practice of using external lightning protection system is to handshake with the downward leader of the lightning strike and ensure the lightning does not strike anywhere else in the structure. A risk assessment based on actual lightning exposure design of the air termination network and downconductors di fth tht i ti t k d thdesign of the earth termination network and earth electrodes. Sample smart ground report lightning protection by. Protect your home by installing a lightning protection system. The function of a lightning protection system is to protect structures from fire or mechanical destruction and to prevent that persons in buildings are injured or even killed. Jun 19, 2015 find out how a lightning protection system works to protect your home from lightning damage. The initial item is an air terminal or protector that intercepts the surge.
Next, a conductor system transfers the energy through a low impedance path. A properly installed lightning protection system lps is over 98% effective in preventing damage associated with a lightning strike. The work covered by this section of the specifications consists of furnishing all labor, materials, and items of service required for the completion of a functional and unobtrusive lightning protection system as. A proper lightning protection system, should consist of three prime components in principal air termination vertical or. The standards define an effective lightning protection system as a set of equipment and devices to capture never to attract lightning and conduct it safely to ground.
This lightning conductor is made up of a 2 to 8 m high tapered metal rod that dominates the structure to be protected and which is connected to minimum two down conductors and two earthing system. 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. A rooftop network of lightning rods or air terminals is connected to a series of down conductors, which. Code of practice for protection of structures against.
Like many other engineering systems, lightning protection is not necessarily a design preference, but the need for a lightning protection system is determined by the requirements of nfpa 70 and nfpa 780, a lightning risk assessment, and oftentimes the facilitys insurance carrier. For three decades, the lightning protection guide from dehn has been the trademark for practiceoriented technical literature in the fields of lightning and surge protection for buildings, installations and systems. Lightning protection system components are intended to be installed and used in accordance with ul 96a, the standard for installation requirements for lightning protection systems. Lightning protection not mandated designed to protect the structure but not a 100% guarantee active and passive protection lps require equipotential bonding of all metallic systems bond all gas piping 6 awg why, when, what and where nfpa 780. History of lightning protection system design in tactical sstems many older communication systems do not have lightning protection incorporated into their design. Desigr ers thought that protection was not necessary in many cases because the antenna mast was relatively short 10 meters or less. Lightning protection standard ul96a lightning protection standard nfpa780 standard of practice lpi175 right.
In some conditions, however the active lightning system is the only possible method to protect from direct lightning strokes. The lightning rod requires a connection to earth to perform its protective function. The risk analysis as per iec 623052 integrated in the dehn risk tool software facilitates selection. Abb opr lightning protection systems 1 lightning mechanism and location 2 lightning protection technologies 3 lightning protection risk analysis 8 lightning protection technical study 9 procedure for measuring the early streamer emission of an ese air terminal according to standard nf c 17102 appendix c 10 tests and research 12. Benjamin franklin invented the lightning rod in 1753. Components must be ullisted and labeled for lightning protection use.
Summary a this section specifies the lightning protection and grounding system for the buildings or structures. For each of these, nfpa 7802020 outlines unique protection guidelines, covering materials, grounding, bonding, concealed systems, corrosion protection, and various other protective measures. Therefore, economic aspects are an important decision criterion. Bs eniec 62305 lightning protection standard the bs eniec 62305 standard for lightning protection was originally published in september 2006, to supercede the previous standard, bs 6651. Lightning protection systems what they do and dont do. Details of our range of publications is provided below.
When the electric field reach this level representing a minimum risk for a lightning, the opr begins to get activated and generates high voltage pulses, helping to. Jul 21, 2017 lightning is a powerful, destructive force of nature and will strike a building regardless of its type of roofing. Lightning protection concept fundamentally still same as the today external lightning protection system. Pdf lightning protection techniques for rooftop pv systems. Fundamentals of lightning protection systems page 2 of 14 fundamentals of lightning protection systems, edition 1c september 2011. The purpose of a lightning protection system, therefore, is to control the passage of a discharge in such a manner that prevents personal injury or property damage. Figure 36 lightning protection fur tents 68 figure 37 lightning protection low cost installation for isolated farm buildings of brick and tile construction 69 figure 38 lightning protection system for sports stadium football ground 70 figure 39 jypical arrangement for protection. Eritech lightning protection systems this catalog details ericos eritech range of lightning protection products to meet the needs of points 1 and 2 of the six point plan. Lightning is a phenomenon in which negative electric charges generated in a thunderstorm discharge to the ground as a result of dielectric breakdown in the air. State of the art for the installation of lightning protection systems 0. The lightning protection system is designed to help protect against lightning strikes in several ways.
Small package bidirectional tvs for esd protection application led lighting embedded system handheld device computer iec compliance iec 642 esd 8kv contact discharge 15kv air discharge iec 644 eft 40a 550ns features 100w peak pulse power low clamping voltage low leakage current. Now the third revised edition of the english lightning protection guide is available. Nfpa 7802020 revises the 2017 edition of the same standard for the installation of lightning protection systems. If youre considering installing a lightning protection system, heres a statistic to consider. A question remains unanswered about a lightning protection project. Lightning protection products platt electric supply. In a lightning protection system, a lightning rod is a single component of the system. Electr onic systems protection equipotential bonding and.
An overall lightning protection system consists of external lightning protection lightning protection earthing and internal lightning protection surge protection. Inspection and maintenance of lightning protection systems session 8. Manufacturers installation standard for lightning protection. Report of the federal interagency lightning protection user group june 2001. The only way to protect a building is with a properly designed and installed lightning protection system lps. Lightning protection by lightning eliminators and consultants. Design the lightning protection system step by step. The book had to be revised and enlarged due to changes in. Design guidelines for lightning protection of pv systems.
This paper discusses the design of a lightning protection system lps as per the prescribed rules in as1768. You have a precision to ask, a complaint or a suggestion to make. May 02, 2015 side flash an electrical spark caused byside flash an electrical spark caused by difference in potential that occurs betweendifference in potential that occurs between conductive metal bodies and a component of aconductive metal bodies and a component of a lightning protection system or ground. Lightning is an extremely powerful and pervasive force of.
This system provides facility protection for the building and occupants by preventing damage to the structure caused by lightning and induced transient currents. Lightning rods come in many different forms, including hollow, solid, pointed, rounded, flat strips, or even bristle brushlike. Our lightning protection systems training course is focused at companies who own or maintain wireless communications and broadcast towers and their antennas. Pdf lightning protection guide 3rd updated edition. We were the first in our industry to implement a major upgrade to pressure diecast rather than traditional sand casting for our major bronze and aluminum fittings. By safely conducting a lightning strike to ground, a lightning protection system can greatly reduce the probability of severe property damage. All main components including the nacelle, blades, controller. Air terminal system down conductor system earth termination system iec 623053, value distance of down conductor is correlated with separation distance. Lightning protection system early streamer emission air terminal. Installations not directly related to those areas and structures housing such installations can be protected against lightning by the provisions of this standard. What engineers need to know 20102012 the number of buildings that collected a combined 37 terminal years of exposure during the study. The subject proceedings resulted from an attack by the heary brothers and other proponents of ese early streamer emission lightning rods, who claimed, among other things, that it was unfair to continue to maintain a standard on franklin rod systems after refusing to approve a standard for ese systems draft 781.
According to data compiled by westinghouse electric company, given an average location and exposure, a 50 ft. Main catalog opr lightning protection systems external. Lightning protection system siemens gamesa pdf catalogs. The placement of air terminals in a lightning protection system is critical for optimal protection. Design guidelines for lightning protection of pv systems eng460 engineering thesis final report mick constable august 2012 to november 20 a report submitted to the school of engineering and energy, murdoch university in partial fulfilment of the. Lightning also serves an important role in the nitrogen cycle by oxidizing diatomic nitrogen in the air into nitrates which are deposited by rain and can fertilize the growth of plants and other organisms. A lightning protection system consists of numerous components that are constructed from highlyconductive copper or aluminum alloys, and that is where we come in. The necessity of a detailed integrated standard prescribing the lightning and surge protection of pipelines in combination with. As a result, a failure of grounding the strike may cause. The basis of conventional lightning protection technology. The separation distance defines the minimum distance of the lightning protection system from electrically conductive materials.
R r t 1 r r 1 without protection measures with protection measures 25238 % 61 % 2,52e03 1e. A certified installer should install your lightning protection system to reduce the risk of a system failure and to ensure that your system meets necessary codes and standards. Physical damage to structures and life hazard software for design and calculation of lightning protection systems when designing lightning protection systems, various parameters must be taken into account. Lightning protection systems are the modern development of the innovation pioneered by benjamin franklin. This standard covers a wide range of structures that are used in commercial and industrial applications. North america holds a significant share in the global lightning protection systems market in terms of revenue. The lightning protection systems market in asiapacific is expected to grow at a substantial rate over the forecast period. Use current division to control the dissipation of lightning strike energy on an antenna tower grounding system through multiple paths. For more information on the range of products designed to cover points 3 through 6, please request a copy of the eritech grounding, cadweld electrical. A practical guide to lightning protection and australia and nz. Find out how a lightning protection system works to protect your home from lightning damage. What would lead experienced system designers and engineers to attempt to manage transient voltage control and surge suppression for these modern systems by. Uls master label certificate signifies that the lightning protection system is installed in compliance with national safety standards.
With a customised lightning and surge protection concept. Ufc 357501 lightning and static electricity protection. The need for lightning protection there is no known method of preventing the occurrence of a lightning discharge. Pdf since lightning has no specific path to reach the ground, it may choose to utilize any conductor available inside a building, house or a. While pricing generally runs less than 1% of the value of the structure, costs for protection vary depending on the size of the structure, location, construction, roof type and grounding conditions. Surges, direct lightning strikes and gridrelated voltage peaks put your battery storage system at risk. Lightning, grounding and protection for control systems. Equipotential bonding and transient overvoltage surge protection electr onic systems protection equipotential bonding and transient.
Lightning protection for buildings with metal roofs 201707. The main function of the lightning protection system installed on the existing building is to capture a lightning stroke and then conduct discharge current safety to the ground. Standard for the installation of lightning protection. Lightning damage to equipment results in losses exceeding twentysix billion dollars annually in north america, and nearly three times that. Nfpa 7802020, standard for the installation of lightning. Contrary to the myths, lightning protection systems. Lightning protection lightning is a giant spark of electricity in the atmosphere or between the atmosphere and the ground. In the initial stages of development, air acts as an insulator between the positive and negative charges in the cloud and between the cloud and the ground. A lighting protection system lps is the system that provides a means by which a lightning discharge may enter or leave earth without passing through and damaging personnel, electrical equipment, and nonconducting structures such as buildings.
Installation of an lps is a tried and true protection method that has been used for more than a century. Lightning protection systems lightning rod installation. The lightning protection institute lpi explains how lpss work in this infographic. Types of lightning protection systems lps electricalknowhow. Since our beginning, thompson has sought to be the industry leader in manufacturing the highest quality conductors and components. 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. Lightning protection a lightning protection system consists of three basic com ponents. Lightning protection system design and installation. A lightning protection system is a passive means of preventing property damage from the effects of a lightning strike. Ufc 350101, electrical engineering, provides the governing criteria for electrical systems, explains the delineation between the different electricalrelated ufcs, and refers to ufc 357501 for static electricity protection and lightning protection system requirements.
Lightning protection systems market, global industry analysis. Pdf a lightning strike could bring thousands megaampere of current in a blink of eyes. A lightning protection systems only purpose is to ensure safety to a building and its occupants if lightning happens to hit it directly, a task accomplished by providing a good, safe path to ground for the lightning to follow. A free pdf reader, adobe acrobat, may be downloaded from the adobe web site. Standard for the installation of lightning protection systems. There are some applications where it becomes difficult to use the standard in its entirety. Today, lightning protection systems are in use on thousands of buildings, homes, factories, towers, and even the space shuttles launch pad. Bs eniec 62305 lightning protection general standard. For a finite period, bs eniec 62305 and bs 6651 ran in parallel, but as of august 2008, bs 6651 has been withdrawn and now bs eniec 63205 is the. It works by providing the electric charge produced by the clouds a path of least resistance to the ground.
The following lightning protection specifications are available for download as pdf files or word documents. Lightning protection is an affordable amenity that offers protection against a leading cause of property damage. A lightning protection system lps provides a specified path on which lightning can travel. The lightning protection institute certifies systems meeting all its requirements. We develop and manufacture these components so installation specialists can effectively protect businesses and homes. A total of 65 pointtopoint ground impedance measurements were performed. The product terms mentioned in the lightning protection guide that are also. Lightning and surge protection of modern electronic system ebb. Point to point measurements were taken to determine the status of the plant grounding system. Lightning current which passes through the common lightning protection system may still dispersed and affect the groundmounted pv power system mainly due to the uncertainties of pointofstrike. The external lightning protection composed by 3 interconnected systems. Contact your local office today for further information and to request your copy. Method of statement for installation of earthing, bonding.