Designs, manufactures and offers technical assessment in spds and lighting rods. Lightning protection institute lpi and lpi 175 the lightning protection institute lpi is a nationwide notforprofit organization founded in 1955 to promote lightning protection education, awareness and safety. This seminar report describes the long flashover arrester lfa, method for lightning protection, working principle, design of lfam, its main applications and laboratory test results. In order to design an effective lightning protection system with franklin rods or capturing meshes, the following rules shall apply. Lightning protection using lfam presentation free download as powerpoint presentation. 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. A piece of equipment is said to be protected from a direct stroke if it remains below the. Jul 10, 2018 conduct the lightning strike safely to ground using down conductors, such as copper earth tapes disperse the strike safely into the earth earthing whilst the structural protection is there to conduct a strike safely to earth this is normally combined with internal protection to prevent sparking within the structure ensuring all metallic. Lightning protection using lfammy lightning insulator electricity. Although not considered a unification issue, it is listed as an air force only criterion since the army no longer uses this style and the navy never did use this style. Lightning protection using lfam presentation lightning. The air force requires third party certification by organizations other than ul for lightning protection system certificates. Lightning protection systems total site protection vfc lp.
The first section barsa dorian mode melody sung by the soprano and alto voices in unisonwhich is accompanied by a counterpoint of the first and second violins, ends on autem crucis. An average span length of 350 m was used between the towers. While the design of the mast incorporated a welldesigned lightning. Block diagram electric schematic protection against direct lightning strokes critical gradient efficiency of lfam. C and their arresters operate under identical conditions, it is practical to. Ieee 9982012 ieee guide for direct lightning stroke.
Bs eniec 62305 lightning protection general standard. The scope includes lighting components in ic, and different materials and dimensions. Jan, 2018 a new simple, effective and inexpensive method for lightning protection of medium voltage overhead distribution line is using long flashover arresters lfa. In 1991, lightning protection was again an issue of the system designed to replace the ab577621 series of masts. Each cable piece has a semi conductive core of resistance r. The important feature of this modular long flashover arrester lfam is that it can be applied for.
Summary a this section specifies the lightning protection and grounding system for the buildings or structures. A third approach, which involves the use of nonconventional lightning terminals and related design. It offers great number of technical and economical advantages. The variation in magnitude and rise times follows the lognormal distribution typical of many natural phenomena. Lightening protection using lfam ppt video online download. A longflashover arrester lfa of a new antennamodule type is. Its members are manufacturers, contractors, scientists, architects, engineers and safety directors. Every year, there are over 25 million lightning strikes affecting 30% of u. If the number of flashover modules increases by increasing the cable pieces this lfam can be used for lightning protection of very high voltage lines. Where i l 1 t is the lightning current steepness and it is the time. Lightning protection using lfam seminar report, ppt, pdf for. Accept and iec 623053 learn more about the cookies we use and how to change your settings. Lack of data due to infrequencies of lightning strikes in switchyards.
Jun 25, 2019 lightning protection using lfam pdf psalm settings psalm magnificat psalm 22 c. This system provides facility protection for the building and occupants by preventing damage to the structure caused. The air force requires third party certification by organizations other than ul for lightning protection. Lightning protection epow 6860 surge phenomena fall 2007 joe crispino 1.
Jun 30, 2020 lightening protection using lfam ppt video online download. Instructions for authors plasma physics and technology journal. Explore lightning protection using lfam with free download of seminar report and ppt in pdf and doc format. Calculate whether lightning protection is required or not for following building. Lightning protection using lfam seminar report, ppt, pdf. The rating of the arrester, the class of arrester and location of the arrester all play in a part in the surge protection. C and their arresters operate under identical conditions, it.
Design problems the unpredictable, probabilistic nature of lightning. From the line, current path may be over the insulators down to lfxm pole to the ground. Lightning protection using lfammy ppt long flashover arrestors are those devices which capture the high voltage sparks resulting out of lightening. Lightning protection zones modern surge arresters bicmos technology 21 electric utility industry. Lightning protection using lfam seminar report, ppt for ece.
Lightning protection using lfa m seminar report free download as word doc. Welcome lightning protection using lfam submitted by. The cable pieces are arranged so as to form three flashover modules 1,2,3 as shown in figure1. Explore iris scanning with free download of seminar report and ppt in pdf and doc format. M indicates that lfam is for the protection of medium overhead transmission full description. The important feature of this modular long flashover arrester lfa m is. The important feature of this modular long flashover arrester lfam is that it can be applied for lightning protection of overhead distribution line against both induced overvoltages and. System description the entire lightning protection system shall be designed and installed in accordance with. Lightning stock flushing density number of thunderstorm. The lightning protection system ground terminals shall be bonded to the building or structure grounding electrode system. Lightning protection using lfa lightning frequency arrester seminar report pdf. A new long flashover arrester model has been developed. The installation contractor shall have personnel on staff certified by the lpi as a master installer designer of lightning protection systems. Scribd is the worlds largest social reading and publishing site.
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. The pole does not get involved in the path of the lightning current until the insulator or the arrestors have flashed over. In protection of substation we use different class of lightning arresters to protect the electrical equipment. For further information, see nfpa 7802011, standard for the installation of lightning protection systems. Lightning protection using lfam pdf friends of pdf. Apr 24, 2010 the important feature of this modular long flashover arrester lfam is that it can be applied for lightning protection of overhead distribution line against both induced overvoltages and direct lightning strokes. Also explore the seminar topics paper on iris scanning 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.
Ufc 357501 lightning and static electricity protection. Vfc and lyncole work together to provide the worlds best lightning protection and grounding solutions. In tall buildings ground is used to discharge and in ships water is used to discharge the voltage. Ieee std 9981996, ieee guide for direct lightning stroke. The goal of this course is to learn how to design lightning protection systems. Manufacturers installation standard for lightning protection. Calculate lightning protection for building structure. Aug 29, 2020 cirprotec, specialists in lightning and surge protection devices. Organ works two aequali the site is also available in several languages.
The dehn lightning protection guide is available as printed book, as pdf. Lightning protection using lfam insulator electricity. A lightning protection system using an early streamer emission air terminal s shall be designed with provisions for inspection and maintenance. Lightning protection of overhead 35 kv lines by antennamodule long flashover arresters. Plastic roads disposal of waste plastic is a major problem. Reducing lightning hazards when working outdoors employers, supervisors, and workers should understand lightning risks, characteristics, and precautions to minimize workplace hazards. Iris scanning seminar report, ppt, pdf for ece students. Lightning protection system design certification i certify that the design of the abovementioned lightning protection system complies with the requirements of the building control regulations 2003, ss. This illustration identifies the components and introduces the basic rules for an. Mar 22, 2021 welcome lightning protection using lfam submitted by. Application of long flashover arresters for improvement of. What are the basic differences between ul 96a, nfpa 780 and. Long flashover arrester lfa seminar report seminar topics. Sep 20, 2019 if the number of flashover modules increases by increasing the cable pieces this lfam can be used for lightning protection of very high voltage lines.
Application of the lightning location system for the selection of. Oct 07, 2020 a new simple, effective and inexpensive method for lightning protection of medium voltage overhead distribution line is using long flashover arresters lfa. Jun 24, 2019 lightning protection using lfam seminar report, ppt, pdf for ece students. The main characteristics are therefore briefly summarized in 4. C the installing contractor shall be listed with the lightning protection institute, and underwriters laboratories, inc.
Design information for the methods historically and typically applied by substation designers to reduce direct lightning strokes to equipment and buswork within substations is provided. Lightning protection using lfa m my ppt free download as powerpoint presentation. Ufc 357501 lightning and static electricity protection systems. Explore lightning protection using lfa m with free download of seminar report and ppt in pdf and doc format.
Insulatorarresters for lightning protection of overhead distribution. The important feature of this modular long flashover arrester lfa m is that it can. For coveredconductor overhead lines ccl using conductors with. 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. Lightning protection using lfa lightning frequency arrester. Investigatory project on ldr pdf the induced over voltages can be counteracted by installing a single arrester on an overhead line support pole. Means of lightning protection of overhead power transmission.
Lightning protection using lfam seminar report, ppt. Lightning protection by lightning eliminators and consultants. V, sree narayana polytechnic college, kottiyam for giving me with excellent lab facilities. Lightning protection for buildings with metal roofs 2017. Calculate no of down conductor for lightning protection area of building structure. End use energy efficiency potential lightning protection using lfam 22 aluminium alloy conductors halbach array surge current protection using superconductors 23 magnetic levitation fast quasistatic capacitance extraction using csurf. Iec is applicable to risk assessment for a structure due to lightning flashes to. Lfa m, which consists of two pieces of cable with an insulating cord made of semi conductor material. 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. The structurethe structure ss effective collection areaeffective collection area for lightning strikes.
Lightning protection standard the bs eniec 62305 standard for lightning protection was originally published in september 2006, to supercede the previous standard, bs 6651. A better lightning protection system may have prevented this accident. Lightning protection system design and installation. The important feature of this modular long flashover arrester lfa m is that it can be applied for lightning protection of overhead. Two approaches, the classical empirical method and the electrogeometric model, are presented in detail. 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. Bs eniec 62305 lightning protection general standard principles.
Tests have been shown that, as the line conductor is stressed by lightning over voltage impulse, flash over channel develop at different rates. Lightning protection lightning is a giant spark of electricity in the atmosphere or between the atmosphere and the ground. Jul 10, 2019 welcome lightning protection using lfam submitted by. Lightning protection using lfam seminar report scribd. Lfa 10m arrester for protection of 10 kv transmission overhead lines. Lightning is unpredictable and can strike outside the heaviest rainfall areas or even up to 10 miles from any rainfall. The induced over voltages can be counteracted by installing a single arrester on an overhead line support pole. Modules1 and 3 flashover first, followed by module 2,and thus, forming a rather long flashover channel along the lfa. Seminar report on protection of lightning arrester pdf document. Lightening protection using lfam system a system of lightning protection conductors lightning rods installed on the. Lightning riskslightning risks ri k t i b d li ht i t ik d itrisk assessment is based on lightning strike density maps called isokeraunic or isoceraunicmaps, plus.
The induced over voltages can be counteracted by installing a single arrester on an overhead line. Modular includes two cables like pieces, has a semi condu. A new simple, effective and inexpensive method for lightning protection of medium voltage overhead distribution line is using long flashover arresters lfa. This iec 623053 that it has to be written from scratch by experts with many years experience. The sphere rolls up and over and is supported by lightning masts, shield wires, substation fences, and other grounded metallic objects that can provide lightning shielding. The magnitude of lightning discharges around the world have been measured from 2000a to more than 200ka, with rise times to peak current of less than 10s. The important feature of this modular long flashover arrester lfam is that it can be applied for lightning protection of overhead distribution line against both induced overvoltages and protectioon lightning strokes. Use an imaginary sphere of radius s over the surface of a substation. In protection of substation we use different class of lightning. Lightning protection systems installed by contractors, can be certifiedlisted by ul using the ul96a, standard for installation.
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