Each bolt can contain up to one billion volts of electricity. Foreword all construction of federal aviation administration faa operational facilities and the. Introductory lightning protection design per nfpa 780. The calculation assumes that all the ther mal energy is generated by the ohmic resistance of the com ponents of the lightning protection system. The calculation method of lightning protection design of. We use cookies to ensure that we give you the best experience on our website. Lightning protection risk assessment calculator the simplified iec risk assessment calculator is intended to function as a companion, and not alternative, to the written standard.
Lightning risk assessment study is actually the measure of risk of a lightning strike and probability of damages. Download lightning protection risk assessment calculator for free. E lightning conductor the main function of the lightning protection system installed on the existing building is to capture a lightning stroke and. Open access lightning discharge and fundamentals of. Lightning discharge parameters in building lightning protection calculations. Calculate whether lightning protection is required or not for following building. Lightning stock flushing density number of thunderstorm. The importance of lemp protection in bs 6651, the protection of electronic and electrical equipment was included as a recommendation only, with its own independent risk assessment.
Where a component of the lightning protection system lps has a primary function, e. Using lightning protection rods and wires as lightning arresters, it visually illustrates the required results in form of the lightning protection volumes and areas. External lightning protection is a system that consists of the air terminal, the arresters, and the grounding system. Students participate in critical discussions to determine the best protection strategies incorporating the guidance of nfpa 780. Planning phase, consultation phase, detailed design phase. 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. The lightning protection systems for this design method should be manufactured. Professional surge protection is provided by specialist electrical companies. Umkc used the rolling sphere method for this study. Open access lightning discharge and fundamentals of lightning protection vladimir a. The primtech lightning protection calculation can accommodate lightning protection rods and wires as lightning arresters.
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. Installation of an lps is a tried and true protection method that has been used for more than a century. Location frequency and severity of thunderstorms in area. Introductory lightning protection design per nfpa 780 a. Lightning protection testing is carried out every 11 months, so that over a 12 year period your system has been tested in every month. Helpful calculation tools for determining a zone of protection are provided. Pdf lightning protection guide 3rd updated edition. The course content is in a pdf file 648 kb introductory lightning protection design per nfpa. An illustrated guide for critical high value facilities in accord with recognized codes and standards national lightning safety institue nlsi on. It starts with a specified arrester in a buildings primary supply or subdistribution. Ul lps zone of protection calculator tool license agreement this ul lps zone of protection calculator tool license agreement agreement is a binding legal agreement between underwriters laboratories inc. Costeffectiveness calculation for lightning protection systems. It assesses the lightening risks to the facility according to international standards requirements.
Ul and you, the enduser of the licensed tool you or customer. The lightning protection institute is a nationwide notforprofit organization founded in 1955 to promote lightning protection education, awareness, and safety. This calculation accounts for the evidence that objects that are higher than their surroundings attract lightning. In essence, structural lightning protection can no longer be considered in isolation, protection. Lightning protection risk assessment methodologies such as those included in iec. Design of lightning protection systems dehnsupport toolbox software. This is a medium to advanced level book, very suitable for science, electric, physics or electronic students written by the world lighting authority dr.
Technical reference key points key variances between the previous standard, bs 6651, and the iecbs en 62305 technical reference table. These calculations are according to iec standard 623052. The effects of lightning currents and surge voltages are many and varied. Bs eniec 62305 lightning protection general standard. Designing to the iec 62305 series of lightning protection standards. Attendees learn how ul 96a and nfpa 780 relate to each other. According to national geographic, there are about 100 lightning bolt strikes on the earths surface every single second. According to the lightning research results, which is based on the overhead line on viaduct in tianjin jinbin light rail project, this paper summarizes the calculation method of lightning protection design which could be used for engineering design of ground and viaduct overhead line. Risk assessment evaluate the importance and value of the facility. Pdf comparison of lightning risk calculation results. Chapter 2 risk analysis to determine the requirement for a lightning protection system we will analyze the cost vs.
Fundamentals of lightning protection systems page 2 of 14 fundamentals of lightning protection systems, edition 1c september 2011. As a result, protection was often fitted after damage had been suffered. An illustrated guide for critical high value facilities in accord with recognized codes and standards. A properly installed lightning protection system lps is over 98% effective in preventing damage associated with a lightning strike. 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 present an integrated design package. With bs en 62305, this protection has been made an integral part of the standard. This page is dedicated to spreadsheet type calculators that can be used to assist all surge protection stakeholders in their effort to improve the reliablity of power systems. Part 1 of the standard also introduces new concepts for. Report of the federal interagency lightning protection user group june 2001.
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 requirements for the degree of bachelor of engineering. Calculate no of down conductor for lightning protection area of building structure. For the most uptodate product features and benefits, specifications, certifications and associated downloads for all products used in lightning protection applications, please visit our lightning protection home page. Calculate lightning protection for building structure. Product update new strikerisk software for lightning. All protection calculations have been derived from the ieee standard 9982012, ieee guide for direct lightning stroke shielding of substations.
Pdf lightning discharge parameters in building lightning. Calculate area of building structure calculate collection area of structure calculate probable no of strike on structure calculate overall risk factor calculate whether lighting protection required or not calculate number of down conductor free download. The protection calculation of large complete substations, such as the 21bay substation below with 46 lightning rods, is just as feasible as the combined calculation of lightning arresters comprising of rods and wires. Lightning protection risk assessment design services. Nfpa 780 and ul 96a lightning protection installation. 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. Design calculations of lightning protection systems part. Ingesco has an online tool which allows the calculation of risk and the implementation of protective measures. Use current division to control the dissipation of lightning strike energy on an antenna tower grounding system through multiple paths.
Guidelines for developing inspection requests for explosive and flammable location applications is also covered. An overall lightning protection system consists of external lightning protection lightning protectionearthing and internal lightning protection surge protection. Installations not directly related to those areas and structures housing such installations can be protected against lightning by the provisions of this standard. The national severe storms laboratory nssl estimates at least 30 million points on. Standard for the installation of lightning protection systems. Buy nfpa 780, standard for the installation of lightning. 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. Knowing the steps of lightning protection system design process, knowing the definitions of main terms in lightning protection system design process, knowing iec 623052 method of risk assessment study, knowing nfpa 780 method of risk assessment study, knowing software method for performing the risk assessment study.
Lightning protection for critical explosives operations mitchell guthrie, independent engineering consultant, 234 guthrie road, blanch, nc. The book had to be revised and enlarged due to changes 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. The basis of conventional lightning protection technology. Each calculation of protection was taken as a single piece of protection equipment first. Protection level calculator schirtec lightning protection. Cdrisk software helps to calculate the risk assessment and to design a lightning protection system exhaustively. These calclators are for your education on the subject. The design concepts will be demonstrated for industrial, commercial and institutional buildings. Separate the antenna tower from the equipment building by a minimum of 30 feet. 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. Comparison of lightning risk calculation results using different software based on new standard iec 623052 conference paper pdf available september 2006 with 1,868 reads how we measure reads.
Lightning protection risk assessment calculator free. Professional surge protection for building installations. Risk assessment calculator, maxwell lightning protection co. A proposed methodology for risk assessments for temporary lightning exposures mitchell guthrie, independent engineering consultant, 234 guthrie road. Furthermore, it defines the relationships between damage and loss that form the basis for the risk assessment calculations in part 2 of the standard. Calculation tools for determining a zone of protection is provided. To determine the need for protection against lightning for a given building or structure, the following variables are to be considered. A risk analysis does not only allow to determine the class. Reviewed in the united states on december 24, 2012. Lightning protection calculation lightning protection. Design guidelines for lightning protection of pv systems. The product terms mentioned in the lightning protection guide that are also.
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