Cisco aironet lightning arrestor airacc245lan mounting. One rod is connected to the line circuit and the other rod is connected to earth. This chapter explains the general introduction of the metal oxide zno used as a surge arrester. Other sources of highvoltage transients are also described, such as static electricity and induction. Typically, a lighting arrester provides a low resistance path for surges to the. The original lightning arrester was nothing more than a spark air gap with one side connected to a line conductor and the other side connected to. This table documents how well the arrester clamps lightning and switching surges, which is the fundamental purpose of arresters. Lightning arresters catch surges in electrical wiring and divert them to grounding cables, which direct the current into the ground. The lightning surge and arresters contents introduction the thunder head the flash and stroke incidence of lightning magnitude of arrester currents the lightning surge traveling waves introduction this arresterfacts is about the lightning surge from an arrester perspective.
This text does not try to add any knowledge to the vast knowledge base on. The corresponding lightning stroke location of the maximum voltage at the entrance of the substation or the terminal of the transformer is defined as the critical point. Pdf application and analysis for surge arrester on lightning. How to protect your house from lightning national lightning. Zipse, fellow, ieee abstractthe successful 200yearold method of using a franklin rod to collect, control, and convey to earth the awesome and destructive power of lightning has produced other controversial, potential alternate methods. Keywords lightning, lightning arresters, mov, overvoltage, residual voltage. Surge arrester placement for substation lightning protection. The lightning protection system for the site must comply with ieee 998. When a lightning surge travels along the power line to the arrester, the current from the surge is diverted through the arrestor to earth. The amount of energy contained in a lightning stroke is very high and it can be. Lightning and lightning arrester simulation in electrical power.
The source of the lightning was represented by the atp models type15 surge function and type ramp function and the surge arrester was represented by the movtype 92 component. Introduction the typical lightning arrester has a highvoltage terminal and a ground terminal. Lightning and surge arresters siemens et b1 2005 overview combination arresters are surge arresters that meet the basic requirement of requirement category i and ii, i. Prior to the introduction of surge into the network by. Dec 11, 2014 the lightning arresters or surge diverters provide protection against such surges. Jan, 2018 the important feature of this modular long flashover arrester lfam is that it can be applied for lightning protection of overhead distribution line against both induced over voltage and direct lightning strokes. It is widely used as protective devices against switching and lightning over voltages in power electrical systems such as power transformers,distributors, generators, compensation capacitors.
Introduction lightning is a major cause of overhead line. Lightning protection is an essential system for any construction and it is thus necessary to understand the design and usage of this system. The outcome of this paper would be the effect of surge arrester placement in terms of voltage level measured at particular points. Jun, 20 this document describes the lightning arrestor kit and provides instructions for mounting the arrestor. Pdf design of lightning arresters for electrical power systems. Cisco aironet lightning arrestor airacc245lan mounting instructions this document describes the lightning arrestor kit and provides instructions for mounting the arrestor. Lightning protection using lfa lightning frequency arrester. It is a very simple type of diverter and consists of two 1. Jan 05, 2018 lightning protection is an essential system for any construction and it is thus necessary to understand the design and usage of this system. The quick reaction times of surge arresters are used to provide this protection. The typical lightning arrester has a highvoltage terminal and a ground terminal. The important feature of this modular long flashover arrester lfam is that it can be applied for lightning protection of overhead distribution line against both induced over voltage and direct lightning strokes.
It consists of a spark gap is series with a nonlinear resistor. Zinc oxide surge arrester current sharing consideration technical information publ. Introduction to lightning protection and earthinggrounding. A higher rated arrester increases the ability of the arrester to survive on the power system, but reduces the protective margin it provides for a specific insulation level. The basis of conventional lightning protection technology. In appearance of a lightning stroke or switching surge on the system, the residual voltage across the terminals of the surge arrester will be limited to a certain permissible value because of the. Pdf application and analysis for surge arrester on.
Discharge voltage table in every arrester datasheet, you will find a most important table about the discharge voltage of the arrester in question. When the linetoground voltage reached the sparkover level, the voltage surge would be discharged to earth ground. Application guidelines overvoltage protection metaloxide. The kit employs a polyphaser surge protector rated for the 900mhz frequency band of the. Cisco aironet lightning arrestor airacc245lan cisco. As a way of definition, lightning is a powerful, sudden. Surge diverter lightning arrester working lightning. As one of the worlds leaders in mov formulation, and their use in a gapless construction design, all classes of ge arresters offer the same quality mov. Mar 27, 2014 the metal oxide lightning arrester is the most advanced over voltage protector. Do not use electric equipment like computers and appliances during a. When lightning strikes a line protected with a lightning arrester, the nonlinear. 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. It protects people from injury, structures from damage and electrical equipment from failure due to surge voltages. The metal oxide lightning arrester is the most advanced over voltage protector.
A lightning arrester is essentially a collection of billions of microscopic junctions of metal oxide grains that turn on and off in microseconds to form a current path from the top terminal to the ground terminal of the arrester. Since introducing the worlds first metal oxide arrester in 1976, offering new concepts in. 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 and components, knowing the correct choice of lightning protection system components. Compositehoused surge arrester texlim highvoltage surge. The results obtained indicate that the voltages induced by the lightning can reach values of the order of millions over insulation flashover levels for 22 kv equipment, where is clearly seen in. Introduction ightning is a very impressive phenomenon that occurs in nature. Part of selecting a good quality arrester is understanding the published data.
The induced over voltages can be counteracted by installing a single arrester on an overhead line support pole. Its a great conductor of electricity, so do not take a shower, wash your hands, wash dishes or do laundry. They differ only in constructional details but operate on the same principle, providing low resistance path for the surges to the round. Introduction lightning is the most frequent cause of overvoltages on distribution systems. Modern era of arrester design the introduction, in 1930, of the first siliconcarbide arrester marked the beginning of the modern era of lightning arrester design. Jun 24, 2018 surge diverter lightning arrester types. Surge arrester equipment being protected 950 kv bil v 461 kv v distance 10 meters steepness of voltage wave 11 kv s, per kv mcov c speed of light 3 x 10 meters second 300 meters s 10 ka, 820 s discharge voltage of 461 kv v voltage stress at the equipment 10 meters away from the arrester 66% 100 573 377 100 573 950 573 % u u. Jul 17, 2017 modern electrical systems tend to be vulnerable to voltage surges of any kind, so arresters have become more necessary. Application of metaloxide surge arresters for alternatingcurrent systems ieee power engineering society sponsored by the surgeprotective devices committee cj u a 3 published b y the institute of electrical and electronics engineers, inc. Lightning arrester 21 free download as powerpoint presentation. The device which is used for the protection of the equipment at the substations against travelling waves, such type of device is called lightning arrester or surge. If installed correctly this arrester offers an added level of protection against lightning damage. The original lightning arrester was nothing more than a spark air gap with one side connected to a line conductor and the other side connected to earth ground.
Installation instructions for lightning arrester kit kit. Arrester construction metal oxide disks the core operating component of a modern lightning arrester is the metal oxide varistor mov element. A dc surge arrester is generally composed of a shell, a nonlinear resistance sheet, a spring, a pressure release device, a sealing device, etc. The earthing screen and ground wires can well protect the electrical system against direct lightning strokes but they fail to provide protection against travelling waves which may reach the terminal apparatus. Effective placement of surge arrester during lightning. A risk assessment based on actual lightning exposure design of the air termination network and downconductors di fth tht i ti t k d thdesign of the earth termination network and earth electrodes. Installation instructions for lightning arrester kit kit number 5300534 this kit is intended for use with the binmaster directional wireless system, wl 19d. Application guidelines overvoltage protection metal. Design of lightning arresters for electrical power systems. A good quality supplier will fully disclose the relevant data in a format that is comprehensible and userfriendly. Introduction the tranquell polymer distributionriser pole arrester is designed to limit surge voltage by conducting the surge current to ground, and.
The proper selection and application of lightning arresters in a system involve. Lightning protection system design and installation. Lightning strokes are applied at different distances from the entrance point. While the design of the mast incorporated a welldesigned lightning. Introduction the tranquell polymer distributionriser pole arrester is designed to limit surge voltage by conducting the surge current to ground, and thus avoiding equipment damage. Keywords lightning, surge arrester, insulation coordination, pscademtdc. There are several types of lightning arresters in general use.
Texlim is abbs family of compositetube arresters that offer an ideal alternative to traditional porcelainhoused arresters for protection against overvoltages. A lightning arrester alternative spelling lightning arrestor also called lightning diverter is a. Several popular types of lightning arresters are available. This article introduces in such aspects as the working principle of line surge arrester and effect of lightning protection, and also explores application for lightning arrester of distribution. The siliconcarbide arrester with a series multigap design is still in limited use today, exclusively on distribution class arresters. Introduction overvoltage transients can be created through lightning static discharges, switch processes, direct contact with power lines, or through earth currents. Scribd is the worlds largest social reading and publishing site. Environmental science, geography, geology, history, materials science. 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 tropical thunderstorm in full flow. Xdlge ieeeiec lightning arresters xdge provides a full range of porcelain and polymer housed ieee and iec rated arresters for ac and dc transmission, substation, and distribution applications.
In 1991, lightning protection was again an issue of the system designed to replace the ab 577621 series of masts. Lightning arrester, substation, overvoltage, attenuation, harmonics. Both arrester survival and equipment protection must be considered in arrester selection. The application and selection of lightning arresters.
Xdge arresters are widely used in power plants, transmission substations, distribution substation and high voltage power equipment up to 1100kv. This video aims to give customers an introduction to. Ieee guide for the application of metaloxide surge arresters. A lightning protection system consists of both external and internal lightning protection measures. Lightning arrester 21 lightning insulator electricity. Modern electrical systems tend to be vulnerable to voltage surges of any kind, so arresters have become more necessary. A lightning arrester alternative spelling lightning arrestor also called lightning diverter is a device used on electric power systems and telecommunication systems to protect the insulation and conductors of the system from the damaging effects of lightning. Overvoltage transients can be created through lightning static discharges, switch processes, direct contact with power lines, or through earth currents. Continued from article complete overview of lightning arresters part 2 types of lightning arresters for outdoor application. Ge offers an extensive line of surge arrester products. The lightning arrester is a nonlinear device that acts as an open circuit to low potentials, but conducts electrical current at very high potentials. This paper presents an overview of how the lightning strikes and their effects on power. Seswga 2364e edition 1, 199004 abb hv switchgear asea brown boveri introduction to meet high energy requirements parallel columns of zno blocks have to be used in surge arresters or several arresters have to share the current and thus the energy.
Surge arrester is one of the important component in the electrical system network either. A high strength, compositehoused arrester family for line discharge class 3 to 5 and system voltage up to 800 kv. According to operational experience at home and abroad. Working of lightning arrester power circuit r nonlinear resistor spark gap lightning arrester fig.
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