Chapter 2 risk analysis to determine the requirement for a lightning protection system we will analyze the cost vs. Our pdf merger allows you to quickly combine multiple pdf files into one single pdf document, in just a few clicks. Richard tarney, executive vice president and chief consultant. Lightning protection surge protective devices on all incoming services ul listed lightning protection installers provide compliant systems by specifying, purchasing, and installing lightning protection systems certified by ul. Lightning is the most dangerous and frequently encountered weather hazard that. Lightning protection risk assessment calculator excel spreadsheet published on june 14, 2015 june 14, 2015 32 likes 5 comments. Calculate lightning protection for building structure. To determine the need for protection against lightning for a given building structure, the variables to the right are to be considered. Calculate whether lightning protection is required or not for following building. The aim of a risk analysis is to reduce the existing risk to a tolerable risk rt. A few panel protectors have circuitry that allows them to combine a low surge. 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. All protection calculations have been derived from the ieee standard 9982012, ieee guide for direct lightning stroke shielding of substations.
Reviewed in the united states on december 24, 2012. Designing to the iec 62305 series of lightning protection standards. Lightning protection calculation lightning protection. Dolan lightning is the leading cause of church fires 30 percent in the u. Lpi advocates use of lpiip as the thirdparty inspection authority for system design, components and installation. Each bolt can contain up to one billion volts of electricity. The importance of lemp protection in bs 6651, the protection of electronic. Standard for the installation of lightning protection systems. Comparison of lightning risk calculation results using different software based on new standard iec 623052 conference paper pdf available september 2006 with 1,956 reads how we measure reads. The basis of conventional lightning protection technology. Pdf comparison of lightning risk calculation results using.
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. Type of constructions b steel framed encased without metal roof as per table multiplying factor 0. Example calculations of the effects of indirect lightning strikes. Lightning protection risk assessment design services. Protection of aircraft electricalelectronic systems against the indirect effects of lightning, dated december 21, 2006, is cancelled.
The book had to be revised and enlarged due to changes in. 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. Wondersahre pdf merger is an efficient program to help you merge. Risk assessment evaluate the importance and value of the facility. Cdrisk software helps to calculate the risk assessment and to design a lightning protection system exhaustively. 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. Installations not directly related to those areas and structures housing such installations can be protected against lightning by the provisions of this standard. Planning software for lightning protection systems. If you select yes then proceed with calculation steps.
Furse, has developed its specialist range of transient overvoltage or surge protection devices to protect vital electronic systems in the rail industry. A proposed methodology for risk assessments for temporary lightning exposures mitchell guthrie, independent engineering consultant, 234 guthrie road. The surge current per phase can be calculated by adding the surge current. Fundamentals of lightning protection systems page 2 of 14 fundamentals of lightning protection systems, edition 1c september 2011. But if you, select no all the adjacent collection area will equal zero even if you enter some dimensions in the input green cells. The primtech lightning protection calculation can accommodate lightning protection rods and wires as lightning arresters. Just like its predecessors, this edition of the lightning protection guide offers assistance in installing professional lightning protection systems in line with the very latest standards. The dehnsupport toolbox software offers a variety of calculation options in the field of lightning protection ranging from risk management to the calculation of the length of the airtermination rods, separation distances and length of the earth electrodes. Report of the federal interagency lightning protection user group june 2001. Calculate no of down conductor for lightning protection. Separate the antenna tower from the equipment building by a minimum of 30 feet. Lightning protection lightning does strikebut it doesnt have to destroy. Lightning protection master label certificate services.
Sites above marked with the contain pdf copies of this application guide. Design calculations of lightning protection systems part. Location frequency and severity of thunderstorms in area. 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. The effects of lightning currents and surge voltages are many and varied. Protection level calculator schirtec lightning protection. Lpi publishes this booklet, lpi 175, based on nfpa 780, with additional explanatory material helpful to installer and inspector member personnel.
The national severe storms laboratory nssl estimates at least 30 million points on. Pdf the new method of lightning risk calculation developed within iec. Documentation and printout countryspecific standard designations and the associated national calculation values can be selected and displayed in the dehn risk tool software. Design calculations of lightning protection systems part thirteen in article design calculations of lightning protection systems part two. Open access lightning discharge and fundamentals of lightning protection vladimir a.
It starts with a specified arrester in a buildings primary supply or subdistribution. 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. 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. Protection from direct lightning strikes in electrical networks. The lightning protection standard is an iec standard and was therefore incorporated in the standards of the cenelec members under consideration of national requirements.
How to protect your house and its contents from lightning. Open access lightning discharge and fundamentals of. Lightning protection for industrial plants phillip tompson managing director, novaris pty ltd abstract this paper provides an outline of. This is a medium to advanced level book, very suitable for science, electric, physics or electronic students written by the world lighting authority dr. 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 standards for aircraft electrical and electronic system lightning protection are based on the aircrafts potential for lightning exposure and the. Design guidelines for lightning protection of pv systems. Professional surge protection is provided by specialist electrical companies. Pdf comparison of lightning risk calculation results. How to protect your house from lightning premier power inc.
Buy nfpa 780, standard for the installation of lightning. Product update new strikerisk software for lightning. Australiannew zealand standard lightning protection asnzs 1768. An overall lightning protection system consists of external lightning protection lightning protectionearthing and internal lightning protection surge protection. 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. Dear sir, a building structure height is 95 meter and a vertical air termination lighting protection is provided at top. Apdf merger will even work with passwordprotected pdf files. Calculate no of down conductor for lightning protection area of building structure. Ovr practical guide for the protection against surges. Lightning protection risk assessment calculator free.
Lightning and surge protection basic principles 1 introduction rarely does the power of nature strike an observer more forcibly than the sight for the first time of a. Use current division to control the dissipation of lightning strike energy on an antenna tower grounding system through multiple paths. Lightning protection risk assessment calculator excel. 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. The lightning protection institute lpi adopts the latest edition of the nfpa 780 standard as its reference document for system design. 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. These calclators are for your education on the subject. If you continue to use this site we will assume that you are happy with it. According to national geographic, there are about 100 lightning bolt strikes on the earths surface every single second. In general, it is not economically possible to provide total protection against all the possible. A risk analysis does not only allow to determine the class of lps, but also to create a complete protection concept including the necessary lemp protection measures. The calculation method of lightning protection design of. Umkc used the rolling sphere method for this study. A simple and lightningfast desktop program that lets you combine multiple pdf.
Lightning protection risk assessment methodologies such as those included in iec. Using lightning protection rods and wires as lightning arresters, it visually illustrates the required results in form of the lightning protection volumes and areas. The courses combine theoretical and practical aspects, dealing with a wide range of subjects such. The lightning discharge the transient discharge of electric current that occurs between a negative charge centre and a positively charged region is a lightning flash. We use cookies to ensure that we give you the best experience on our website. Each calculation of protection was taken as a single piece of protection equipment first. Ingesco has an online tool which allows the calculation of risk and the implementation of protective measures. 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. Ul and you, the enduser of the licensed tool you or customer. 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. The nittygritty of pension plan mergers mergers are not a panacea but can have significant benefits importance of commonality between plans being merged consider a fully funded plan design for future benefit accruals 3. Download lightning protection risk assessment calculator for free. Apdf merger is a simple, lightningfast desktop utility program that lets you combine two or.
461 1042 1457 20 1500 1047 850 561 781 345 1330 332 32 420 1059 1376 352 880 454 1034 615 1466 481 726 983 272 158 328 488 162 1001 1356 242 541 840 737 797 245