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. The technology was developed in year 1752 when benjamin franklin first started experimenting with the lightning mechanism. Complex 3d calculation is undertaken in an intuitive. It starts with a specified arrester in a buildings primary supply or subdistribution. He is member of institution of engineers mie and ceng,india. The sphere does touch the top of the building, it is vulnerable. And all of this equipment should be installed per nfpa 780. If you continue to use this site we will assume that you are happy with it. Objective of the paper is to test the iec equation for separation distances with state of the art computer codes solving the complete maxwell equations. The building at right is quite a bit higher than d.
Lightning protection risk assessment calculator free version. Professional surge protection is provided by specialist electrical companies. 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. Documentation and printout countryspecific standard designations and the associated national calculation values can be selected and displayed in the dehn risk tool software. Risk assessment calculator, maxwell lightning protection co. State of the art for the installation of lightning protection systems 0. The areas under the protection of lightning rods are identified according to the lightning risk calculation carried out for the facility to be protected.
Lightning protection calculation lightning protection. Open access lightning discharge and fundamentals of lightning protection vladimir a. These calclators are for your education on the subject. Separate the antenna tower from the equipment building by a minimum of 30 feet. Lpi started promoting lightning protection education, awareness and safety in 1955. The main function of the lightning protection system installed on the existing building is to capture a lightning stroke and then conduct discharge current safety to the ground. Be sure to carefully read and understand all of the rights and restrictions described in this agreement. 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. Zischank2 1 university of federal armed forces, munich, germany email. Pdf lightning protection zones created by traction. Installation of an lps is a tried and true protection method that has been used for more than a century.
This ul lps zone of protection calculator tool license agreement agreement is a binding legal agreement between underwriters laboratories inc. Furse, has developed its specialist range of transient overvoltage or surge protection devices to protect vital electronic systems in the rail industry. Requirements for lightning protection systems, or nfpa 780, standard for the installation of. To determine the need for protection against lightning for a given building structure, the variables to the right are to be considered.
As shown in figures 1 and 2, the franklin rod offers a cone of protection based upon its installed height above the structure. Professional surge protection for building installations. Lightning protection for communications facilities radio and tv broadcast towers are often the tallest objects around and as such are especially susceptible to damage from lightning not to mention other natural phenomenon. In some conditions, however the active lightning system is the only possible method to protect from direct lightning strokes. E lightning conductor the main function of the lightning protection system installed on the existing building is to capture a lightning stroke and then conduct discharge current safety to the ground. The main function of voltage surge protectors is to provide protection against the indirect effects. Protection would need to be installed on the top sides of the building and the roof. 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. Calculate lightning protection for building structure. The international standard iec 623053 2 further recommends using electrically conductive parts of a building or. Planning software for lightning protection systems.
Calculated over the course of a day, this corresponds to. Where protection greater than lpl i is required, we must then examine all. The secondary protection feature grounds any high voltage peak spike which might be passed by the primary protector. In this study, a new computational method has been developed for calculation of the separation distance between an lps and metallic.
Students participate in critical discussions to determine the best protection strategies incorporating the guidance of nfpa 780. Lightning discharge and fundamentals of lightning protection journal of lightning research, 2012, volume 4 5 and if 10 percent of the direct lightning current flows in the wire producing didt 1010 a s1, 10 kv will be produced across each meter of the wire. In article design calculations of lightning protection systems part two, i indicated the lightning protection design process involves a number of design steps as in fig. Download lightning protection risk assessment calculator for free. An updated nfpa 780, lpi 175 and ul 96a risk assessment is forthcoming. Now the third revised edition of the english lightning protection guide is available. Costeffectiveness calculation for lightning protection systems. Design calculations of lightning protection systems part. Sep 20, 2015 dear sir i need some clarification for arc gap in between two rods of lightning arrester that could be used for a 11 kv transmission lines 1the space in between two metal rod will give a capacitance effect or it will act as a resistance. You will be provided with helpful calculation tools for determining a zone of protection and participate in critical discussions about this protection strategy. The dehn distance tool makes it possible to calculate the separation distance and to visualise the building as a 3d model. The primtech lightning protection calculation can accommodate lightning protection rods and wires as lightning arresters. These devices simultaneously ground both sides of a pair when a surge appears on either line of the pair.
The effects of lightning currents and surge voltages are many and varied. This is a medium to advanced level book, very suitable for science, electric, physics or electronic students written by the world lighting authority dr. A lightning protection system consists of numerous components that are constructed from highlyconductive copper or aluminum alloys, and that is where we come in. The aim of a risk analysis is to reduce the existing risk to a tolerable risk rt.
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. Ingesco has an online tool which allows the calculation of risk and the implementation of protective measures. X international symposium on lightning protection 9 th november, 2009 curitiba, brazil necessary separation distances for lightning protection systems iec 623053 revisited fridolin h. Apply level ii protection, the notional sphere radius corresponds to r 30m. Product update new strikerisk software for lightning. Photovoltaic lightning protection device installation and. Lightning stock flushing density number of thunderstorm. Calculate no of down conductor for lightning protection. 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 photo. 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 calculation free download as pdf file. Sizing conductors and selecting protection devices legrand. Electrical and electronic system within the structure need to be followed and a proper and respective surge protection device spdsneed to be employed individually for. This paper proposes a cad application for lightning protection where the results are presented by using information visualization techniques. An overall lightning protection system consists of external lightning protection lightning protectionearthing and internal lightning protection surge protection.
Open access lightning discharge and fundamentals of lightning. Building lighting protection calculation excel electrical. Designing to the iec 62305 series of lightning protection standards. A proposed methodology for risk assessments for temporary. To calculate the different radii of protection of a ese lightning rod, we must know the variables involved in the formulation.
Lightning protection risk assessment calculator free. Lightning protection risk assessment calculator excel. An epic storm over city of kosice slovakia with lightning bolts blasts too close for comfort by martin lajs via flickr these calculations are according to iec standard 623052. The product terms mentioned in the lightning protection guide that are. Pdf lightning protection guide 3rd updated edition. The book had to be revised and enlarged due to changes in standardisation and technical progress. Type of constructions b steel framed encased without metal roof as per table multiplying factor 0. Following tools shall be arranged before starting the work for earthing, bonding and lightning protection system installation and testing. 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. Much of the sides as well as the roof can be struck by lightning. Lightning loss risk assessment involves the evaluation of various criteria to determine the risk of loss due to lightning. 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.
This is the oldest concept in lightning protection. L1 loss of human life, l2 loss of service to the public, l3 loss of cultural heritage, l4 loss of economical value including service and loss of activity, are introduced with the various sources of damages, i. Hence, three striking distances are taken into concern for the design. The lightning protection institute is a nationwide notforprofit organization founded in 1955 to promote lightning protection education, awareness, and safety. Nfpa 780 and ul 96a lightning protection installation. Protection level calculator schirtec lightning protection. Open access lightning discharge and fundamentals of. 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. 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. Lightning protection calculation risk electrical equipment scribd.
Each calculation of protection was taken as a single piece of protection equipment first. However the most severe risk level may not be adequate to provide the protection level required for the application. Fully developed by aplicaciones tecnologicas, cdrisk is the most complete software of the sector for risk calculation and lightning protection analysis according to the current standards. Helpful calculation tools for determining a zone of protection are provided. Physical damage to structures and life hazard software for design and calculation of lightning protection systems when designing lightning protection systems, various parameters must be taken into account. Lightning protection risk assessment calculator excel spreadsheet published on june 14, 2015 june 14, 2015 32 likes 5 comments.
As a result of the analysis, the radius of the lightning rod coverage is 79m in areas with risk level 1, which can increase up to 107m in an area with risk level 3. The calculation of the striking distance can estimate the probability of lightning strike on a structure and thereby evaluate the effectiveness of a lightning protection system lps. Today, i will explain the third method for performing the risk assessment study. We develop and manufacture these components so installation specialists can effectively protect businesses and homes. As a result, protection was often fitted after damage had been suffered. On receipt of the lightning protection system materials at site necessary precautions shall be taken for unloading, shifting and storage, as follows. Calculation tools for determining a zone of protection is provided. An engineer can use a risk assessment calculation based on nfpa 780, installation of lightning protection systems.
Its membership is comprised of engineers, manufacturers, contractors, scientists, architects, and safety directors. All protection calculations have been derived from the ieee standard 9982012, ieee guide for direct lightning stroke shielding of substations. The basis of conventional lightning protection technology. Comparative study on substation shielding due to direct. Lightning protection would need to be installed on the roof.
Separate measures as recommended in iec 623054 protection against lighting. Lightning can be likened to a disruptive electrical discharge due to the dielectric. Calculate no of down conductor for lightning protection area of building structure. 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. Arresterworks is not responsible for how the data is applied. Material shall be stored in a covered dry space at all. Riesgo software in article design calculations of lightning protection systems part twelve. The main components of a lightning protection system are air terminals, down conductors and ground rods. The nvent erico lightning protection selection calculator is now part of our worldwide electronic catalog. It is easy to understand how even a very small fraction of the. The lightning protection standard is an iec standard and was therefore incorporated in the standards of the cenelec members under consideration of national requirements. 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.
Guidelines for developing inspection requests for explosive and flammable location applications is also covered. We use cookies to ensure that we give you the best experience on our website. Calculate whether lightning protection is required or not for following building. Cdrisk software helps to calculate the risk assessment and to design a lightning protection system exhaustively. Where a component of the lightning protection system lps has a primary function, e. The lightning protection systems for this design method should be manufactured from materials having highly corrosionresistive characteristic. 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. A properly installed lightning protection system lps is over 98% effective in preventing damage associated with a lightning strike. Fundamentals of lightning protection systems page 1 of 14 fundamentals of lightning protection systems, edition 1c september 2011. List of applicable documents shown in order of increasing legal force.
The importance of lemp protection in bs 6651, the protection of electronic. Pdf minimum separation between lightning protection system. Report of the federal interagency lightning protection user group june 2001. 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 complete calculation of installations has been found to be so long, complex, and even daunting as to justify the ongoing development of practical. Fundamentals of lightning protection systems page 2 of 14 fundamentals of lightning protection systems, edition 1c september 2011. Outlines are not consensus documents and do not require. Reviewed in the united states on december 24, 2012. 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. Building lighting protection calculation excel september 20, 2015 16 comments. Umkc used the rolling sphere method for this study. Ul and you, the enduser of the licensed tool you or customer. 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.
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