This report discusses design applications of lightning protection systems to. Lightning protection systems ipc part ip306a for trees. It might not blow out equipment, but it has an effect, tarney says. Lightning strikes near line and induces a voltage on it v max 38. In this approach, the building is subdivided into zones with different risk potentials. Zone where lightning electromagnetic environment is defined. Lightning damage to equipment results in losses exceeding twentysix billion dollars annually in north america, and nearly three times that worldwide with more than 150 strikes per second. How to protect your house from lightning national lightning. 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. Lightning protection of power systems then and now part 1 by jonathan woodworth arresterworks first electrical product mass produced when i teach overvoltage protection classes, i break up the sections with electric history questions. The zone boundaries of an lpz are not necessarily physical boundaries e. The basis of conventional lightning protection technology. Due to the entirety of the measures described in the emcconform lightning protection zones concept, a permanent system availability of a modern infrastructure can be. The zones are areas characterized according to threat of direct or indirect lightning flashes and full or partial.
The external lightning protection system includes all systems installed outside. The lightning phenomenon lightning is the phenomenon which accompanies the discharge of atmospheric charges from cloud to cloud or from cloud to earth. Now the third revised edition of the english lightning protection guide is available. The highest requirements are placed on the discharge capacity of lightning current arresters and combined arresters used at the transition from lightning protection zone 0 a to 1 or 0 a to 2. Defining the lightning protection zones outer zones. Power lightning arrester is not provided with our product. Pdf lightning protection zones created by traction. The lightning protection system shall be installed under the supervision of a lpi certified master installer, or an installer with at least 5 years of experience as a ul master label installer. This consists of two external zones, lpz 0a and lpz 0b, and typically two internal zones, lpz 1 and lpz 2. This always gets everyone thinking and presents a good segue for learning about surge protection.
The protection zone can be visualized as the surface of a sphere with radius striking distance, s. This books should be accompanied by the others books. The aforementioned lightning and surge protective measures at the boundaries of the lightning protection zones apply to both the power supply and it system to the same extent. The lightning protection institute is a nationwide notforprofit organization founded in 1955 to promote lightning protection education, awareness, and safety. Lightning protection zone concept the lpz concept according to iec 623054. This is a medium to advanced level book, very suitable for science, electric, physics or electronic students written by the world lighting authority dr. 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. In russia, for instance, a single lightning rod zone was usually a circular cone, whose vertex coincided with the rod top. Professional surge protection for building installations. To determine the need for protection against lightning for a given building structure, the variables to the right are to be considered. Pdf lightning protection of overhead power distribution lines. When lightning protection engineers realized that the height of the rod was to exceed that of the object to be protected the cone vertex was placed on the rod axis under its top. Our lightning protection systems training course is focused at companies who own or maintain wireless communications and broadcast towers and their antennas.
State of the art for the installation of lightning protection systems 0. Lightning protection mastering the maze of bs en 62305. Outdoor lightning protection system design specifications. According to this principle, the structure to be protected must be subdivided into inner lightning protection zones with different lemp threat values. The lpz have the function of reducing to predefined values the influence of electromagnetic fields and interference on the electric lines. Lightning protection of power systems then and now part 1. The paper presents analysis of lightning protection zones of railway traction construction on example of polish dc 3 kv railway in the case of traction wires net with the individual and the group. 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. Zonepdf is a cuttingedge, lightning quick, and smart pdf tool.
Study of lightning safety distance using rolling sphere method. The ieee surge protection devices committee spdc has been writing. The unique features of this system allow optimum performance, flexibility of design, and overall costeffective installation. Lightning protection theory schirtec lightning protection. The zonal approach to lightning protection, as established in bs eniec 62305 see page 272, lightning protection zones, is applicable for designing an lps suitable for hazardous areas, considering the following points. As the build up and separation continues until the voltage difference between the cloud and the ground exceeds the air insulation strength, it resulted in a lightning discharge as the air resistance is overcomeresistance is overcome.
We develop and manufacture these components so installation specialists can effectively protect businesses and homes. Lightning and surge protection for explosive atmospheres ee. The valms t1t2 protective device for lightning protection level iii iv also covers the range of a type 2 arrester. Pdf lightning protection of overhead power distribution. These products are also backed by the foremost lightning protection design department in the world today. Definition of lightning protection zones lpz 0 a zone where the threat is due to the direct lightning flash and a the full lightning electromagnetic field. Figure 8 example of protective zone containing dish antenna 16. Standard for the installation of lightning protection systems.
Lightning protection guide 3rd updated edition dehn africa. Chapter 2 lightning protection design, engineering, acquisition, installation, and. Marine insurance and damage avoidance report over the past couple of hundred years, as science has learned more about the nature of nature, lots of folks have tried to find ways to protect their homes and. Protection design guidelines in this handbook are applicable to composite airframes. Practical earthing, bonding, lightning and surge protection. Be sure to locate underground utilities before installing the lightning protection systems by calling tennessee one call system, inc. Explore lightning protection using lfam with free download of seminar report and ppt in pdf and doc format.
The minimum values of lightning current amplitude for the different lpl are used to derive the rolling sphere radius in order to define the lightning protection zone lpz 0b which cannot be reached by direct strike. This is critical for maintaining the functionality of the system. The neccec allow for increased protection in highlightning areas by the optional. Coordinating lightning protection for reroofing projects. 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. A system combining these connectors joining a simulated air terminal and ground rod to a. Bonding connections to mechanical, electrical and plumbing systems made to prevent side flashes arcs between these systems and the lightning protection system. Power lightning arrester is used for limiting the voltage surge due to a lightning. Jul 12, 2007 whilst bs 6651 recognises a concept of zoning in annex c location categories a, b and c, the new standard defines the concept of lightning protection zones lpzs. Information is included on the natural lightning environment, the interaction between aircraft and lightning, and the mechanism of the lightning strike effects on the aircraft. Basic design specifications for lightning protection systems. Innovative, installerfriendly components make harger the leading provider of lightning protection equipment.
Erico manufactures, using the eritech trade name, lightning protection systems in full accordance with more than twelve national and international. A direct strike to the lightning protection system or to other parts of an enduser buil ding causes an earth potential rise that may lead to the operation of surge protective devices or to. Marine insurance and damage avoidance report over the past couple of hundred years, as science has learned more about the nature of nature, lots. A lightning protection system consisting of one or more overhead ground wires also known as overhead shielding.
Nlsi promotes proactive defenses to mitigate the effects of lighting hazards. When lightning hits a tower lightning rod, large currents of energy race incredibly close to sensitive electronic equipment on their way to the ground. Pdf harger lightning protection equipment line card. Protection against lightning a uk guide to the practical. Fundamentals of lightning protection systems page 1 of 14 fundamentals of lightning protection systems, edition 1c september 2011. Lightning protection system works a brief explanation of what happens when lightning strikes. This study focuses on comparing and analyzing the outcomes of the four models of egm with respect to dif. Also explore the seminar topics paper on lightning protection using lfam with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year electronics and telecommunication engineering or ece students for the year 2015 2016.
Lightning protection zone concept dehn international. Type 2 surge arrester including residual current device. Designing to the iec 62305 series of lightning protection standards. Lightning protection quiz questions electrician exams. The bs eniec 62305 standard for lightning protection was originally published in. Lightning protection by lightning eliminators and consultants. If an outdoor ac power cord should be directly connected to the device, please use a power lightning arrester. The definition of lightning protection zones lpz must be done according to the in accordance with iec 623054. This concept has led to the given rolling sphere scheme for simplified electrogeometric. The internal systems may be subjected to full or partial lightning surge currents. Your files are secure all of the files you convert at zonepdf are transferred over a secure connection.
Devices defined by the standard as suitable to carry lightning current. Lightning protection lightning is a giant spark of electricity in the atmosphere or between the atmosphere and the ground. A lightning protection zone concept in conformity with the iec 623054 standard provides effective protection against surges caused by a lightning electromagnetic impulse lemp. We are family owned and operated, located in goshen, indiana and established in 1934. Reviewed in the united states on december 24, 2012. According to the lightning protection zone concept as per iec 623054 en 623054, adequate surge protective devices, which will be described below, must be provided for all lines at the boundaries of the lightning protection zones. Lightning protection of iecex hazardous areas to atexiecex. Lightning protection consultant handbook erico is dedicated to providing a costeffective lightning protection solution for any given application. Chapter 3 design guidelines the lightning protection system for most communications system applications consists of. The author examines the physical behavior of lightning, various types of lightning damage, the role of lightning detection and warning in effective protection, as well as options for deflecting or eliminating lightning. A lightning protection system consists of numerous components that are constructed from highlyconductive copper or aluminum alloys, and that is where we come in. Lpz 0 zone where the threat is due to the unattenuated lightning electro magnetic field and where the internal systems may be subjected to full or partial lightning surge current. Lightning protection zone concept dehn united kingdom.
The team at mega lightning protection treats lightning differently and theyve been doing so for over 40 years. Zonepdf easy and secure solution for processing pdf. The management of the process for determining the need and delivering an lps to a structure andor an lpms to protect electrical or electronic systems within a structure. Lightning protection level is used to design protection measures according to the relevant set of lightning current parameters. By combining the grounds for the ac and signal spds in one unit, the. Comparative study on substation shielding due to direct. National lightning safety institute provides objective consulting, education, training, videos, expert witness, and site assessment relating to lightning safety. I o is peak lightning current h a is average height of line y is the distance from line of lightning stroke most typical of lightning fashovers on a distribution line much less energy than a direct strike. Enhanced protection system the nvent erico system 3000 is a technically advanced lightning protection system. In many cases, it is obvious that some form of protection is required. Before proceeding to design a lightning protection system, first carefully consider if the structure actually needs protection.
Whilst bs 6651 recognises a concept of zoning in annex c location categories a, b and c, the new standard defines the concept of lightning protection zones lpzs. As illustrated positive electrical charges gather in the clouds and negative. Lightning protection guide 23 lightning protection level max. Lightning and surge protection for explosive atmospheres.
Design calculations of lightning protection systems part. In order to design an effective lightning protection system with franklin rods or capturing meshes, the following rules shall apply. Specially built lightning cables of either copper or aluminum that interconnect all air terminals and safely conduct the lightning strike to ground. Lightning protection using lfam seminar report, ppt. These arresters must be capable of conducting partial lightning currents of 10350. This may include strike termination devices, cables, lightning protection fittings, ground terminals, or. Lightning protection according to iec 62305 diogo filipe da silva santos thesis to obtain the master of science degree in. As lightning seeks the path of the least resistance, it naturally tends to follow the shortest way between cloud and earth, such as buildings or towering projections.
381 2 20 195 1370 1581 1294 1634 1580 137 188 564 585 1507 1440 110 1136 587 77 1578 251 433 103 616 795 386 1559 1171 181 809 404 558 1151 1008 1399 569 802