Bonding, grounding and surge protection by richard kithil, president and orlando alzamora, vicepresident national lightning safety institute nlsi 1. A lightning protection system with an earth resistance of 10 ohms can still allow a buildup of over a million volts. New european standards regarding lightning and surge protection lightning strikes the earth 100 times a second. Lightning protection, grounding, equipotential bonding and surge protection are all interdependent disciplines and the focus of the nvent erico brand of facility. Rolling spheres method for lightning protection epow 6860 surge phenomena fall 2007 joe crispino 1. Protection of structure from lightning lightning protection systems, essentially lightning conductors protection of structures and voltage surge protectors protection against overvoltage, offer effective protection if they are. Boatinglightning protection page 4 lightningprotected boats there is no such thing as lightningproof boats, only lightningprotected boats. Even the newer buses like can and profi use rs485 or similar technology and often use rs485 transceivers or. Masterspec now includes the lpiip inspection program as an option for followup quality assurance inspection for lightning protection systems. Design problems the unpredictable, probabilistic nature of lightning. No more complicated calculations with dehnsupport toolbox 2. Mission viejo, ca september 8, 2011 holt integrated circuits, a world leader in data bus ics for commercial and military avionics, today published a new application note an301 which provides guidelines for protection against lightning induced transients applied to holts latest generation of arinc 429 line drivers and receivers. Lightning protection for equipment and installation meteolabor. Reviewed in the united states on december 24, 2012.
The ieee surge protection devices committee spdc has been writing. Lightning pdf professional free version download for pc. 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. 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. All pdf files created are 100% industrystandard and fully compatible with any pdf viewer. Installations not directly related to those areas and structures housing such installations can be protected against lightning by the provisions of this standard.
Bs en 62305 defines four lightning protection levels lpls based on probable minimum and maximum lightning currents. When lightning hits the ground, it is estimated that only 15% of it penetrates the earth and the rest travels across the surface. Another study, sponsored by 16 oil industry companies, found that 52 of 55 rim seal fires were caused by lightning, and concluded that lightning is the most common source of ignition. Fundamentals of lightning protection systems page 1 of 14 fundamentals of lightning protection systems, edition 1c september 2011. Lightning protection the following information is from the. Basic lightning protection zone lpz concept bs en 623054. Bolt tension cap can be turned so cables can run horizontal or verticle. A lightning protection system or lightning terminal provides a way in which the static electricity discharge may enter or leave without passing through and damaging homes and other structures. The file size of the latest downloadable setup file is 30 mb. Today, i will explain the different types of lightning protection systems lps.
Data comms and lightning protection the rs485 bus the rs485 bus is the defacto standard bus used in industry. Specification kurn lightning terminal k urn terminal merupakan ala t penangkal petir yang d i design untuk menciptakan med an ion is asi pada sekeliling area lonezer dissipation system. Lightning protection for facility operational continuity requires attention to combinations of. Design calculations of lightning protection systems part one in article design process for lightning protection systems, i indicated that the design process for lightning protection systems is commonly broken into discrete phases, allowing the lightning protection designer to. Because the lightning is very huge and has very big electrical.
This handbook is written to assist in the understanding of the iec 62305 series of lightning protection standards. Ufc 357501 lightning and static electricity protection. Hence works which have been previously installed and already accepted under the old standards do not become defective because, as a result of the updating of the standards, a higher technical standard is demanded. All our estimates are free, so call 8664152231 today for a chat about your lightning protection needs. The equipment and systems used for lightning protection are required to comply with the national. These lpls directly equate to classes of lightning protection systems lps. Lightning and surge protection technical note the electrical current within a typical lightning strike, behaves as a sharp edge pulse which rises to its peak value very quickly in 110 microseconds and decays over 50200 microseconds. 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. If you hear the sound of thunder, then you are in danger from lightning. Lightning rods, lightning protection and lightning protection rod parts. The need to provide protection should be assessed in the.
Lightning protection glossary of terms lightning protection institute. Besides voice communication, mobile data communication gained momentum with the. We create a lightning protection and earthing concept including drawings, mounting details, detailed descriptions, tender specifications and bills of material. Until api rp 545 was published in 2009, the existing lightning protection standards for the petroleum industry provided little guidance. These tested, highquality products for earthing, lightning protection, equipotential bonding. The lightning mechanism lightning is an electrical discharge either between the opposite charged regions within a cloud or between the lower region of a cloud and the ground.
Energy is divided and shared by a distributed ground connection. Lightning pdf professional 7 is the complete pdf alternative to adobe acrobat specifically designed for business users. Lightning protection group export department 22, rue du 8 mai 1945 f95340 persan france tel. The new standard uses the class of lps to define several attributes of the lps. Chapter 2 lightning protection design, engineering, acquisition. Lightning damage is not covered under the motorola warranty. New european standards regarding lightning and surge protection joe ellwood. With most nempprotected installations the discharge capacity of the protection elements is determined by the prevailing lightning danger.
Electrical code, nfpa 70 and installation requirements. Thousands of trees are struck by lightning every year. These ships are frequently struck, but the high conductivity of the large quantities of metal, with hundreds of square. Types of lightning protection systems lps electricalknowhow. The following lightning protection study, with its associated drawings, is intended to display the level of protection and suggested lightning protection that should be added to the new ring bus substation configuration in the scope of the umkc substation project. Allmetal ships are rarely damaged, and injuries or deaths are uncommon. Lightning protection and grounding, 4 all about lightning protection. We use cookies to ensure that we give you the best experience on our website. How to protect your house from lightning national lightning. In addition to these, there may be legislation or rules of each country that must be taken into account. As the name implies, the lightning rod kurn brand is a device created to avoid the risk of danger caused by lightning. Impulse protection you cannot stop a large ilimpulse with a silingle lightning arrestor in most cases. 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.
Ds202de dehn uni earthing clamp saddle clamp pdf only. Lightning phenomenon, effects and protection of structures. The basis of conventional lightning protection technology. The need for lightning protection there is no known method of preventing the occurrence of a lightning discharge.
The best book for both teachers and students to learn physics exactly like in the good old days. 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. Guidelines for lightning protection according to rtca do. This lightning protection study was done based on the protection of equipment in the. Sep 09, 2011 mission viejo, ca september 8, 2011 holt integrated circuits, a world leader in data bus ics for commercial and military avionics, today published a new application note an301 which provides guidelines for protection against lightning induced transients applied to holts latest generation of arinc 429 line drivers and receivers. Lightning is a bright flash of electricity produced by a thunderstorm. The surface gradient can exceed 10,000 volts per foot. The former event is a cloudtocloud discharge, while the latter, known as. 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. Design calculations of lightning protection systems part. The lightning protection institute is a nationwide notforprofit organization founded in 1955 to promote lightning protection education, awareness, and safety. This report investigates the discharge mechanism and discusses the principles of lightning protection and the way this is applied to the protection of structures. Our systems are tested daily by mcafee and secured by ssl. This is a medium to advanced level book, very suitable for science, electric, physics or electronic students written by the world lighting authority dr.
As every radar user knows, lightning is very important, dangerous and vital subject for radars. The lightning protection system is defined by its protection class, where the effectiveness of protection class i decreases down to pro. 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. Fully licensed and insured, rs lightning protection is here to service your requirements in a timely and friendly manner. Even the newer buses like can and profi use rs485 or. Lightning protection for facility operational continuity requires attention to combinations of defenses. Bases lightning protection, lightning protection rods. In both cases, this recommendation provides the procedures for the design and installation of the lightning airtermination system, down. 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. Sites above marked with the contain pdf copies of this application guide.
Lightning protection national lightning safety institute. Boating lightning protection page 4 lightning protected boats there is no such thing as lightning proof boats, only lightning protected boats. Kesempurnaan hasil cipta itu send iri dibagi dalam 2 dua bagian, yaitu. This books should be accompanied by the others books. New european standards regarding lightning and surge. Standard for the installation of lightning protection systems. Requirements for the the safety of people staying at work, home etc. 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. Lightning protection theory schirtec lightning protection. Lack of data due to infrequencies of lightning strikes in. Selling cheap lightning protection from distributor kurn. Design of lightning protection systems dehnsupport toolbox software. The transient nature of the current within a lightning flash results in electrical effects. Rakov neither data nor theory supports claims that lightning elimination and early streamer emission techniques are superior to conventional lightning protection systems affiliation.
Earthing and lightning protection systems arthur flury. Many people are not aware that a lightning protection system does not prevent lightning strikes. All thunderstorms produce lightning and are very dangerous. A cast base threaded for mounting on horizontal or verticle surfaces using screws, 14 bolts, 14 drivein anchors, or an adhesive. Lightning protection systems with nonradioactive ionization device. Lightning pdf professional is an allin1 pdf solution for creating industrystandard pdf files, editing pdf text and images, converting pdfs to office documents, adding comments plus editing and filling in pdf forms. The lightning protection international standard prof. Lightning protection mastering the maze of bs en 62305. The external grounding system iv after have created our single point ground panel, spgp, in the hamshack and attached on it our surge protectors as well as all cabling, take a look at the outside.
648 103 432 55 952 974 10 769 1242 1320 600 1379 1193 782 304 939 510 770 312 34 1378 455 408 991 988 708 1352 237 1306