Data comms and lightning protection the rs485 bus the rs485 bus is the defacto standard bus used in industry. Practical earthing, bonding, lightning and surge protection. A rolling sphere method is used to determine the height of the terminals. Also explore the seminar topics paper on lightning protection using lfam with. These trees will have varying degrees of damage ranging from complete. Lpi advocates use of lpiip as the thirdparty inspection. Outlines are not consensus documents and do not require. Lightning protection it is obvious that a high level of protection against lightning strikes can only be established if the complete system is protected. Physical damage to structures and life hazard software for design and calculation. There is a close correlation between the type of damage, the. Pdf lightning protection zones created by traction. Fundamentals of lightning protection systems course no. In essence, structural lightning protection can no longer be considered in isolation, protection.
The lightning protection institute is a nationwide notforprofit organization founded in 1955 to promote lightning protection education, awareness, and safety. Lightning protection for explosive facilities technical. Standard for the installation of lightning protection systems. The multipoint discharge method of lightning protec tion was patented in 1930. Lightning protection overview lightning protection institute. Only an entire system can provide effective protection for all areas of power, signals and data and we offer an ideal form of surge protection for all these applications fields. The following documents are applicable to the subject of this manual. Xdsgfs12001r2 earthing and lightning protection uncontrolled when printed page 5 of 37 xdsgfs12001r2 iec 62305 protection against lightning parts 14. This is critical for maintaining the functionality of the system. If you continue to use this site we will assume that you are happy with it. Requirements for lightning protection systems, or nfpa 780, standard for the installation of. Pdhonline course e1 2 pdh introductory lightning protection design per nfpa 7802000instructor. He evidently dis carded the dissipation method in favor of the rod.
Week 101 november, 2014 and now, for something completely different over the past few months i have been asked by several companies and other sites to write a blog. En 62561 lightning protection system components all relevant parts. Designing to the iec 62305 series of lightning protection standards. This paper provides comprehensive analysis on the lightning protection scenarios in 48 communication and broadcasting towers situated in similar isokeraunic contours in sri lanka at 79 81 east. Lightning protection risk assessment design services. I just went through the rigmarole of moving all notes and attachments to enhanced notes and files. A piece of equipment is said to be protected from a direct stroke if it remains below the curved surface of the sphere. Now the third revised edition of the english lightning protection guide is available. Alexander director of engineering crawford broadcasting company abstract lightning strikes cause more damage to broadcast site equipment. Introduction to lightning protection delegates participating in our training course will receive a thorough overview of all aspects of lightning protection, from lightning standards to testing techniques. Installations not directly related to those areas and structures housing such installations can be protected against lightning by the provisions of this standard.
Ieee 80 guide for safety in alternating current substation grounding. Australiannew zealand standard lightning protection section 1 scope and general 1. Surge protection has become an area of increasing significance. Bs eniec 62305 lightning protection general standard. Lab notes lightning protection part 1 qst october 1994, pp. Lightning protection systems with nonradioactive ionization device. In 1955, the lightning protection institute lpi 4 was formed. Method for the design of lightning protection, noise. When lightning hits the ground, it is estimated that only 15% of it penetrates the earth. Printed circuitboard should be checked carefully for physical damage or residues from burnt out components. Nfpa documents like the national electrical code nec nfpa 70, national fuel gas code. The basis of conventional lightning protection technology. On the one hand, electrical and electronic components continue to get smaller. To do this, technical studies, all the protections to be put in place and the rules.
Fundamentals of lightning protection systems page 1 of 14 fundamentals of lightning protection systems, edition 1c september 2011. This rolling sphere method and all considerations regarding the protection of substations from direct strokes of lightning is described in detail in ieee standard 998. The lightning protection institute lpi adopts the latest edition of the nfpa 780 standard as its reference document for system design. A quarter of industrial plants is struck by lightning at least once every 5 years.
Bonded lightning protections pdf document downloads. Nfpa published its first document on lightning protection in 1904. Hence works which have been previously installed and already accepted under the old standards do not become defective because, as a result of the updating of the standards, a higher. History and modern approaches department of electrical and computer engineering university of florida, gainesville 86th ams annual meeting 2nd conference on. Explore lightning protection using lfam with free download of seminar report and ppt in pdf and doc format. Technical reference lightning protection of hazardous areas to atexiecex these atmospheres create hazardous areas, where flammable gases, powders, or dusts have the potential to mix with air at a. 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. National lightning safety institute provides expert training, consulting, education, videos, and witness service on lightning safety for buildings and critical facilities, both government and commercial. The height of the rod determines the breadth of protection. Chapter 2 lightning protection design, engineering, acquisition. Lightning protection of power systems then and now part 1. The following lightning protection specifications are available for download as pdf files or word documents.
Per my lightning readiness report, there are no plans to develop the documents feature for lightning experience. Thousands of trees are struck by lightning every year. The lightning protection international standard prof. Lightning protection system harger lightning and grounding. Australiannew zealand standard standards new zealand.
Lightning protection materials and products best prices and quality on material in the business. Lightning protection the following information is from the. In addition to these, there may be legislation or rules of each country that must be taken into account. Lightning protection lightning 101 and beyond summit. You can modify the impulse by lowering its intensity and lengggthening its duration. The early streamer emission rods and dissipation arrays sometimes called charge transfer systems belong to the. Knowing lightning and surge protection terminology, abbreviations, signs and symbols, knowing what is lightning and types of lightning flashes, knowing what is the lightning protection systems lps, types. State of the art for the installation of lightning protection. Lightning protection introduction structural lightning protection design considerations bs 6651 protection of structures against lightning clearly advises strict adherence to the provision of a. We use cookies to ensure that we give you the best experience on our website. Lab notes lightning protection part 2 qst december 1994, pp.
The paper presents analysis of lightning protection zones of railway traction construction on example of polish dc 3 kv railway in the case of traction wires net with the individual and the group. Even the newer buses like can and profi use rs485 or similar technology and often use. The lightning protection system the sole purpose of a lightning protection system is to provide structural protection against a direct lightning strike and prevent the devastation caused by lightning. A lightning protection system with an earth resistance of 10 ohms can still allow a buildup of over a million volts. The dehn lightning protection guide is available as printed book, as pdf. Pdf lightning protection scenarios of communication. Lightning protection using lfam seminar report, ppt. Impulse protection you cannot stop a large ilimpulse with a silingle lightning arrestor in most cases.
626 326 1062 1285 1498 664 1408 73 354 138 159 776 892 898 358 1470 401 1204 347 1206 441 629 219 1354 348 2 777 29 702 966 265 1440 10