Lightning protection system design and installation. Low frequency data line protection using psot05c, psd05c, smda05c and cp05c smda05c cp05c psot05cpsd05c figure 9. According to this principle, the structure to be protected must be subdivided into inner lightning protection zones with different lemp threat values. Lightning protection zoneslightning protection zones dec 2012 slide no. In this approach, the building is subdivided into zones with different risk potentials. Pdf distribution lines are often located in areas with high ground flash densities, being therefore subject to lightningcaused power interruptions find, read. Lightning protection standard the bs eniec 62305 standard for lightning protection was originally published in september 2006, to supercede the previous standard, bs 6651. This first was proposed by ef vance of stanford research institute in 1977. This books should be accompanied by the others books. The zones are areas characterized according to threat of direct or indirect lightning flashes and full or partial electromagnetic field.
A commercial and home lightning protection system is composed of 4 main components 1. For 100 years, furse have manufactured marketleading lightning protection and earthing systems solutions, fully compliant with national and international standards. Design calculations of lightning protection systems part. Lightning protection quiz questions answers search for. System pro m compact surge and lightning protection. Each bolt can contain up to one billion volts of electricity. A lightning protection zone concept in conformity with the iec 623054 standard provides effective protection against surges caused by a lightning electromagnetic impulse lemp. The lightning protection institute is a nationwide notforprofit organization founded in 1955 to promote lightning protection education, awareness, and safety. 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. Without this application protection from the effects of lightning may not be assured. Lightning protection mastering the maze of bs en 62305.
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 basis of conventional lightning protection technology. Fundamentals of lightning protection systems page 1 of 14 fundamentals of lightning protection systems, edition 1c september 2011. The national severe storms laboratory nssl estimates at least 30 million points on. The lightning protection zone concept allows planning, implementing and monitoring protection measures. Lightning protection zone how is lightning protection. The lightning rod is designed to initiate an upward streamer in an attempt to attract lightning and ground the charges while protecting the structure and its contents. Compared to the bs 6651s 118 pages, the 475page bs en 62305 is daunting. Bs eniec 62305 lightning protection general standard.
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. Considering that i believe this to be one of the more important topics second only to. Buy nfpa 780, standard for the installation of lightning. Pdf lightning protection of overhead power distribution.
Wiesinger appropriated the idea where itmigrated intotodaysiec 62305. Richard tarney, executive vice president and chief consultant of mega lightning protection doesnt think so. The internal systems may be subjected to full or partial lightning surge currents. 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. The zone boundaries of an lpz are not necessarily physical boundaries e. All relevant devices, installations and systems must be reliably protected to an economically reasonable extent. Cfo cfo is critical flashover the voltage level where 50% chance of flashover combination of the components on pole tables 2 4 in ieee std.
The bs 6651 british standard on lightning protection has existed for decades. The principle behind the lightning protection zone concept is the division of the volume to be protected from overvoltages e. Coordinating lightning protection for reroofing projects. The definition of lightning protection zones lpz must be done according to the in accordance with iec 623054. The lightning protection and ex zones are already harmonised at the design stage.
Structural lightning protection for locations with potentially explosive. Protection against lightning a uk guide to the practical. When an aerial cable is set up, the cable should be through a metal pipe 15m long at least before coming into the building. Dcdc converter protection charge pump using sm15kpaxxan series figure 8. These training sessions combine practical and theoretical as pects and cover a varied. The design concepts will be demonstrated for industrial, commercial and institutional buildings. Lightning protection zone concept the lpz concept according to iec 623054.
The lpz have the function of reducing to predefined values the influence of electromagnetic fields and interference on the electric lines. Lightning protection according to iec 62305 diogo filipe da silva santos thesis to obtain the master of science degree in. Technical reference lightning protection of hazardous areas. Ingesco has an online tool which allows the calculation of risk and the implementation of protective measures quickly and easily. Hence, three striking distances are taken into concern for the design. Lightning protection zone how is lightning protection zone.
This paper provides insights and rationale into zoning details. Sites above marked with the contain pdf copies of this application guide. Lpz 0b zone protected against direct lightning strikes by external air. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Direct stroke lightning hits phase conductor current splits in both directions average current of 20 ka will cause a voltage of 4 mv on line. Before connecting the cable to the device, install a signal lightning arrester on the corresponding port. Thousands of trees are struck by lightning every year. The first lightning rod was invented by benjamin franklin in 1749 and over 250 years later is still the standard component in most lightning protection systems. Sep 19, 2016 the lightning protection institute is a nationwide notforprofit organization founded in 1955 to promote lightning protection education, awareness, and safety. 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. Now, a new standard, bs en 62305, has been published for britain.
Marketleading lightning protection and earthing systems. To determine the need for protection against lightning for a given building structure, the variables to the right are to be considered. Reviewed in the united states on december 24, 2012. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Lightning protection lightning is a giant spark of electricity in the atmosphere or between the atmosphere and the ground. Iec 62305 protection against lightning 20 nfpa 780. This book will be essential reading for everyone involved in the business of lightning protection, including meteorologists, atmospheric scientists, architects, engineers, and firesafety experts. Lightning protection overview lightning protection institute. External lightning protection lightning rod ingesco. 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. Reflecting the latest protection methods, devices, and safety challenges, the 2017 spanish edition of nfpa 780, standard for the installation of lightning protection systems is the new industry benchmark for protecting lives and property from fire and related dangers associated with lightning events. To this end, a building is divided in zones with different risk potentials. Includes internal and external lightning protection measures lightning protection zone lpz zone where lightning electromagnetic environment is defined mesh method mm method to determine position of airtermination system protection angle method pam. Designing to the iec 62305 series of lightning protection standards.
With the ability to protect virtually any structure on land or sea, emp is sure to have a lightning product thats right for you. Ds255e hvi and hvi power conductor for ex zones 1 and 21. A system of absolute protection against lightning is mainly composed of two forms of protection systems, depending on their functionality. Here at key electrical we test to the bs en 62305 standard to ensure your lightning protection system is up to date and inspected correctly. How to protect your house from lightning national lightning. It was approved on behalf of the council of standards australia on september 2006 and on behalf of the council of standards new zealand on 6 october 2006. Week 122 april 28, 2016 in april 2014, i had written a blog on inspection and maintenance titled april showers bring lightning. Basic criteria for protection of structures 41 section 5.
This joint australiannew zealand standard was prepared by joint technical committee el024, protection against lightning. It can serve as a useful guide to justify additional cost incurred by additioh. The course content is in a pdf file 648 kb introductory lightning protection design per nfpa. Pdf lightning protection of overhead power distribution lines. Owners and operators of outdoor recreational facilities rely on engineers and architects to incorporate stateoftheart lightning protection technologies to ensure the safety of patrons and employees at theme parks, water parks, stadiums and other outdoor venues. According to national geographic, there are about 100 lightning bolt strikes on the earths surface every single second. Introductory lightning protection design per nfpa 780 a. High frequency data line protection using pslc05c, gblc05c, sm8lc05c, plcda05 pslc05cgblc05c smda05c cp05c. How to protect your house and its contents from lightning. The zonal approach to lightning protection, as established in iecbs en 62305 is applicable for designing an lps suitable for hazardous areas, considering the following points. Zone where lightning electromagnetic environment is defined. A few panel protectors have circuitry that allows them to combine a low surge. Main catalogue lightning protectionearthing valid as of january 1, 2020.
Lightning and surge protection for explosive atmospheres ee. Where a component of the lightning protection system lps has a primary function, e. Coordinating lightning protection for reroofing projects by kim loehr november 24, 2008 tips for ensuring proper maintenance for both systems lightning protection systems are sophisticated networks that incorporate strike termination devices, lightning current conductors, bonding. Unlike a transmission protection, the height and size of the protection object changes and so will be the height of the shielding wires and masts. Technical reference lightning protection of hazardous. The main function of voltage surge protectors is to provide protection against the indirect effects of lightning. Introductory lightning protection design per nfpa 780. Insurance practitioners and physicians will find this reference of significant.
Behavior of grounding systems under direct lightning strike conditions 5. Not only can the highvoltage impulses damage load equipment, but the temporary fault that follows a lightning strike to the line causes voltage sags and interruptions. Jul 12, 2007 the bs 6651 british standard on lightning protection has existed for decades. This means that the requirements for the use of surge protective devices both in hazardous areas and at the boundaries of lightning protection zones must be fulfilled.
Safer design for safer play a lightning safety initiative. 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 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 away. Lightning protection zone lpz are used to define the lightning electromagnetic environment. Emp offers a wide range of lightning protection products that exceed the performance of a standard lightning rod. Lightning protection by lightning eliminators and consultants. This is a medium to advanced level book, very suitable for science, electric, physics or electronic students written by the world lighting authority dr. Standard for the installation of lightning protection systems. Fortunately, reliable lightning protection of buildings and. A lightning rod is a metal rod or metallic object mounted on top of a structure, engineered to protect the structure in the event of a lightning strike.
Protecting equipment from lightning strikes lightning rods are commonly used on telecom or radio towers, but are they best for protecting expensive electronic equipment. 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. Comparative study on substation shielding due to direct. 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. Furse lightning protection systems bailey lightning. 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. Lightning protection zone concept dehn united kingdom.
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