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. However, the refs 2, 3 can provide some useful overview on lightning protection systems covered by standards such as bseniec 62305. Surge protective devices are categorised as lightning current arresters, surge arresters and combined arresters. Evaluation of rolling sphere method using leader potential. Without external protection, equipment housed in the building may provide the easiest path to earth for lightning currents via sideflashing where the lightning. Preface with the increased use of sensitive electronic equipment and greater awareness of structural.
Nfpa 780 and ul 96a are application standards governing satisfactory installation of an lps. May 02, 2015 introduction to lightning protectionintroduction to lightning protection lightning factslightning facts globally some 2000 on going thunderstormsglobally some 2000 on going thunderstorms cause about 100 lightning strikes to earth eachcause about 100 lightning strikes to earth each second. Lightning protection zone lpz are used to define the lightning electromagnetic environment. The highest requirements are placed on the discharge capacity of lightning current arresters and combined arresters used at the transition from lightning protection zone 0 a to 1 or 0 a to 2. The internal systems may be subjected to full or partial lightning.
Rohit narayan, be electrical, mba tech mgmt, mieaust background the current standard for lightning protection. Part 1 of the standard also introduces new concepts for consideration when preparing a lightning protection scheme, such as lightning protection zones. In this approach, the building is subdivided into zones with different risk potentials. Standard for the installation of lightning protection systems. 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.
The lightning protection zone concept allows planning, implementing and monitoring protection measures. Bs eniec 62305 lightning protection general standard principles. Lightning strike entrance and exit points are usually found in zone 1, but can very rarely occur in zones 2 and 3. I dont need a lightning pro tection system lps because lightning strikes are rare. Protection against lightning a uk guide to the practical. The general principle is that the equipment requiring protection. Bs 6651, code of practice for protection of structures against lightning. According to the insurance informa tion institute, claims for lightning losses cost nearly a billion dollars in lightning protection for the amateur radio operators home lightning protection. Pdf lightning protection of overhead power distribution. Point of strike source of damage type of damage type of loss. Lightning protection zone concept dehn international.
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. This may include strike termination devices, cables, lightning protection fittings, ground terminals, or. It can serve as a useful guide to justify additional cost incurred by additioh. The zones are areas characterized according to threat of direct or indirect lightning flashes and full or partial electromagnetic field. Lightning protection of overhead lines and substations. Lightning protection system components are intended to be installed and used in accordance with ul 96a, the standard for installation requirements for 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. Lightning protection level an overview sciencedirect topics. According to this principle, the structure to be protected must be subdivided into inner lightning protection zones with different lemp threat values. Without this application protection from the effects of lightning may not be assured. Lightning protection of iecex hazardous areas to atexiecex.
Lightning protection calculation lightning protection. Sep 19, 2016 the lightning protection institute is a nationwide notforprofit organization founded in 1955 to promote lightning protection education, awareness, and safety. Nfpa 780 is the standard for lightning protection systems. This ac presents a method of showing compliance with far 29. Lightning protection zone lpz protection of structures bs en 623052 risk management 21 perception of risk risk management procedure uk and world maps bs en 623053 physical damage to structures and life hazard 35 lightning protection. Fundamentals of lightning protection systems page 1 of 14 fundamentals of lightning protection systems, edition 1c september 2011. Classification and testing of surge protective devices 16. Cemaso group, lps france, 3 rue du golf, f33700 bordeauxmerignac, france. Designing to the iec 62305 series of lightning protection standards. A practical guide to lightning protection in australia and new zealand author. The subject of surge protection is rather complicated and requires special knowledge. Some of these zones are protected from high voltage transients.
A practical guide to lightning protection and australia and nz. The level of hirf protection for each aircraft model in the database was categorized as full protection, avionics protection, or no protection. The internal systems may be subjected to full or partial lightning surge currents. Now the third revised edition of the english lightning protection guide is available. Following summary paragraph on lightning protection levels lpl are based on this standard. The zone boundaries of an lpz are not necessarily physical boundaries e. Protection systems in successive zones are arranged to operate in times that are graded through the sequence of equipments so that upon the occurrence of a fault, although a number of protection equipments respond, only those relevant to the faulty zone complete the tripping function. For each lightning protection zone, a risk analysis.
Lightning protection zone concept the lpz concept according to iec 623054. Technical reference lightning protection of hazardous areas. Lightning protection area spanned by lightning protection wires and complemented by lightning protection rods. Inadequately protected aerospace vehicles can be upset, damaged, or destroyed by a. Ul1449, 3rd edition is the safety standard for all surge protection equipment.
Protection measures such as lps, shielding wires, magnetic shields and spd determine lightning protection zones lpz. The zonal approach to lightning protection, as established in bs eniec 62305 see page 272, lightning protection zones. Bs eniec 62305 lightning protection general standard. The zones are areas characterized according to threat of direct or indirect lightning. Engineering analysis of airfield lighting system lightning. Coordinating lightning protection for reroofing projects. Lightning protection zones created by traction construction of railways conference paper pdf available september 2015 with 1,107 reads how we measure reads. To this end, primtech shows protected areas horizontally at the heights to be protected and vertically. Lightning protection guidelines for aerospace vehicles. Practical earthing, bonding, lightning and surge protection.
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. Wiesinger appropriated the idea where itmigrated intotodaysiec 62305. Left bottom connecting two rods with a wire extends the zone of protection. Iec 62305 protection against lightning 20 nfpa 780. Lightning protection zoneslightning protection zones.
Pdf lightning protection zones created by traction. Lightning protection system design and installation. State of the art for the installation of lightning protection systems 0. Lightning protection zones lpz the concept of lightning protection zones lpz was introduced within bs eniec 62305 particularly to assist in determining the protection measures required to establish protection measures to counter lightning electromagnetic impulse lemp within a structure. According to this principle, the structure to be protected must be subdivided into inner lightning protection zones. Some zones are more prone to lightning strikes than others see fig. Abstract protection of structures against lightning has been an area of study for a very long time. The lightning protection institute is a nationwide notforprofit organization founded in 1955 to promote lightning protection education, awareness, and safety. Lightning strike entrance and exit points are usually found in zone 1, but can very rarely occur in zones. Information is included on the natural lightning environment, the interaction between aircraft and lightning, and the mechanism of the lightning strike effects on the aircraft. Devices defined by the standard as suitable to carry lightning current. Atmospheric discharges lightning triggered fi res long before humans walked the earth. The goal of this course is to learn how to design lightning protection systems. Buy nfpa 780, standard for the installation of lightning.
All relevant devices, installations and systems must be reliably protected to an economically reasonable extent. Based on this, individual lightning protection zones can be set up according to iecen 623053. In annex c of iec 623051, the simulation of the lightning. 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 internal systems may be subjected to partial lightning surge currents. 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. Since the middle of the 18th century it began with the work of benjamin franklin by protecting. To this end, a building is divided in zones with different risk potentials. Airplane lightning strike zones are defined by sae aerospace recommended practices arp 5414 see fig. 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. However, the designer of the installation, who is a competent person, may decide that, due to particular risks, main equipotential bonding of the lightning protection system should be avoided. Therefore, this catalogue provides you with some helpful information.
Lightning protection is a safe investment for any station. Direct vs indirect effects direct effects an aircraft is divided into zones. Lightning discharge, risk assessment, lightning protection system, iec 62305. Helpful calculation tools for determining a zone of protection are provided. Protection design guidelines in this handbook are applicable to composite airframes. Part 1 of the standard also introduces new concepts for consideration when preparing a lightning protection scheme, such as lightning protection zones lpzs and separation distance. Reporting of lightning strike incidents has drastically improved over the last 5 years, indicating the effectiveness of lightning strike incidentgathering procedures. Contact us lps france lightning protection, connected. A lightning protection system consisting of one or more overhead ground wires also known as overhead shielding. Protection zone of a lightning protection system may be defined as the volume of space inside which an air termination provides protection against a direct lightning strike by attracting the strike to itself 3. Design calculations of lightning protection systems part. This first was proposed by ef vance of stanford research institute in 1977. Acamj 2053b lightning protection f fuel systems acamj 206a acamj 20tbd lightning environment document acamj 20tbd zoning document nprmlnpa for part 23 t 1 nprmlnpa for part 25 nprmlnpa for part 27 nprminpa for part 29 these documents have been prepared by the electromagnetic effects harmonization working group.
Nfpa 780, standard for the installation of lightning protection systems, delivers a flexible approach to providing applicable safety protocols for lightning hazards based on the use of the. For installation, a building is divided into several zones of protection. Lpz 1, zone where the surge current is limited by current sharing and by. Acamj 2053b lightning protection f fuel systems acamj 206a acamj 20tbd lightning environment document acamj 20tbd zoning document nprmlnpa for part 23 t 1. St d d li ht istandards lightning protection systemsprotection systems iec en 62305. The height and positions of masts can be used to generate a zone of protection under a rolling sphere draped surface. The commonly used engineering tool for determining zone of protection of lightning protection. Integrated grounding, equipotential bonding and lightning. Nonhazardous area hazardous area zones 1, 2 isolated coupling is barrier zone 1 zone 2 lightning protection of hazardous areas in line with atexiecex with hazardous areas at risk from the consequences of direct and indirect lightning, a comprehensive approach to lightning protection in line with iecbs en 62305 should be considered. This paper provides insights and rationale into zoning details. According to the insurance informa tion institute, claims for lightning losses cost nearly a billion dollars in lightning protection for the amateur radio operators home lightning protection is a safe investment for any station. Lightning protection zone concept dehn united kingdom. These lightning protection requirements apply to normal conditions and possible.
Study of lightning safety distance using rolling sphere method. Damage and loss iecbs en 62305 identifies four main. Since the middle of the 18th century it began with the work of benjamin franklin by protecting structures against. The management of the process for determining the need and delivering an lps to a structure andor an lpms to protect electrical or electronic systems within a structure. The regulations require lightning protection of aircraft. Of explosion protection unwanted ignitions are older than mankind. The basis of conventional lightning protection technology. Standard for the installation of lightning protection systems2014 standards 20. Lightning protection of buildings is a separate subject beyond the scope of this book. 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.
The concept of lightning protection zones lpz was introduced within bs eniec 62305 particularly to assist in determining the protection measures required to establish protective measures to counter lightning electromagnetic impulse lemp within a structure. Due to the entirety of the measures described in the emcconform lightning protection zones. Lightning protection overview lightning protection institute. Right towers taller than 30 metres provide protection for an area 30 metres high and 60 metres wide. These arresters must be capable of conducting partial lightning. Bs eniec 62305 lightning protection standard mafiadoc. 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. Ul 96 and ul 467 are product standards for lightning protection components.
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