Without good earth connections, even the most sophisticated of building lightning protection installations will. Hps manufactures ohio brass polymer and porcelain insulators and arresters used in the transmission, substation and distribution markets. We shall discuss the following types of lightning arresters. Silicon carbide porcelain housed arrester identification guide. They consist of series of nonlinear resistor disc and spark gaps. They differ only in constructional details but operate on the same principle, providing low resistance path for the surges to the round. There are many arrestor types used against lightning hazards. Selection of arrester simplified selection procedure for a detailed selection guide, please refer to abb publications pthvpa 2300e and pthvpa 2310e. The lightning arrester which consists the single or multigaps connected in series with the current controlling element, such type of arrester is known as the lightning arrester. It essentially consists of a rod gap aa in series with a second gap enclosed within the fiber tube.
The resistance regulates the level of current allowed into the arrester at once, and the choke coil increases the reactivity of the arrester when transient frequency occurs. The 3eq2 surge arrester for systems of up to 550 kv is one of the. Surge arrestor and grounding technical specifications. The selection of arrester depends on the various factors like voltage, current, reliability, etc. Each piece of electrical equipment in an electrical system needs to be protected from voltage surges. Antivibration type, antipollution type and plateau type arrester are available for special application. The principle lightning arrester types are as under. There are several types of lightning arresters in general use. The proven type 3ej4 surge arrester is also available for indoor use. Our ieee station arresters are 100% routine tested and designed to exceed the requirements of ieee c62. Surge arresters and lightning current arresters from dehn offer reliable. Surge arrester for dallas homeowners not all surge arresters protect systems from lightning. Ieee guide for the application of metaloxide surge.
The 3ej0 and 3ej9 surge arresters are optimized with an extremely low protection level for protection against overvoltages. Classification and testing of surge protective devices 16 3. Clamp the over voltage down below the bil of the equipment 3. Mediumvoltage arresters for distribution networks surge. It is placed very near to the equipment and when the lightning occurs the arrester diverts the high voltage wave of lightning to the ground. The types of lightning arresters are rod, sphere, horn, multi gap, electrolyte, and metal oxide. To prevent damage to electrical equipment, surge protection considerations are paramount to a welldesigned electrical. Distribution arresters overvoltage protection eaton. It is a very simple type of diverter and consists of two 1.
Types of lightning arresters for outdoor application. This manual covers installation and maintenance of eaton s cooper power series varistar type azg4 surge arresters. Fig shows the essential parts of an expulsion type lightning arrester. Modern electrical systems tend to be vulnerable to voltage surges of any kind, so arresters have become more necessary. Continued from article complete overview of lightning arresters part 2. It consist tworod electrodes, one of which is connected to the line and other to earth. Arresters are connected between the electrical device to be protected and a solid earth ground. Protecting consumers and their equipment sources of over voltages. Our designs include suspension, station and line post, as well as polymer insulator and arrester combinations for lightning protection. Lightning arresters chloshikhe hey guys you will get all knowledge about all subject of electrical engineering in very easy language.
It is a very simple line type of diverter and consists of two 1. Check insulator withstand capability of the housing use paragraph 8. Us1151726a us86621414a us1914866214a us1151726a us 1151726 a us1151726 a us 1151726a us 86621414 a us86621414 a us 86621414a us 1914866214 a us1914866214 a us 1914866214a us 1151726 a us1151726 a us 1151726a authority us united states prior art keywords horn arrester gap resistance sections prior art date 19141012 legal status the. Surge arresters over voltage protection basic function of a surge arrester is to limit overvoltages to acceptable limits. If the name on the name plate is as follows, it will be an sic type arrester mcgraw edison g arrester, type f, type ss, type e, type rp. Surge diverter lightning arrester working lightning arrester types. Manufacturing date if it is manufactured before 1977, it will be a sic type arrester if it is manufactured between 19771987 it is likely a sic type arrester and warrants a closer look. What are the different types of lightning arrester. Lighting arrester in hindi electrical capsule youtube. Horn lightning arrester definition of horn lightning. Foreword this foreword is not a part of ieee std c62.
The voltage was recorded at the substation 11022 kv and at. The baseline surge arrestor blla01 is a cri cal part of the surge protec on scheme for the twowire path. Pdf performance of surge arrester installation to enhance. The typical lightning arrester has a highvoltage terminal and a ground terminal. This type of arrester is also called protector tube and is commonly used on system operating at voltages up to 33kv. When a lightning surge or switching surge travels along the power line to the arrester, the current from the surge is diverted through the arrestor, in most cases to the earth. Design of lightning arresters for electrical power systems. The types of surge arrestors are distribution, lowvoltage, station, dc, neutral protection, fiber tube, signal, network, etc. A lightning arrester alternative spelling lightning arrestor also called lightning diverter is a. Horn lightning arrester definition is a lightning arrester in which the spark gap is formed by two wires that diverge like a pair of horns. The 3ej4 surge arrester for indoor use is a cage design surge arrester that offers the same features as the version for outdoor use. Electrical centre a 1 11 kv 45 kn disc insulator nos 260.
There follows a section detailing the systematic procedure for the electrical and mechanical design of a surge arrester. Due to the above limitations the rod type arrester is only used as a backup protection in case of main arrester. Surge diverter lightning arrester working lightning. Expulsion type, valve type lighting arrester function, construction, diagram. Lightning arresters are devices used to stop lightning from damaging electrical power systems. One rod is connected to the line circuit and the other rod is connected to earth. Types of lightning arresters the lightning arrester protects the electrical equipment from lightning. The source of the lightning was represented by the atp models type 15 surge function and type ramp function and the surge arrester was represented by the mov type 92 component. 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. They work when excessive voltage cause the spark gaps to touch, the current is driven to the ground through the nonlinear resistors 78. The following points highlight the top nine types of surge diverters.
Lightning arresters catch surges in electrical wiring and divert them to grounding cables, which direct the current into the ground. Surge and lightning arresters eatons mission is to improve the quality of life and the environment through the use of power management technologies and services. While lightning current arresters class 1 are used to protect against direct lightning surge currents, surge arresters class 2 protect equipment from induced surges in electrical wiring. The gap between the electrodes intercepts the flow of current through the arrester except when the voltage across the gap raises beyond the critical gap flashover. Rod gap lightning arrester is the simplest form of lightning arrester. How lightning areester work surge arrester youtube. Pdf 686 kb, 12017 varistar type azu heavyduty distribution class underoil arrester installation instructions.
Lightning arresters or a surge diverter is a protective device which conducts the high voltage surge on the power system to the ground. Metaloxide surge arresters with external series gaps improve the reliability of transmission systems, and help. Lightning arrester lightning arrester types types of. The following types are protective against lightning surges. Arresterfacts 017 what is a transmission line arrester copyright arresterworks 2009 jonathan j. This arrester type is more applicable in high powered electrical systems. All lightning arresters are designed to become more conductive when the applied voltage becomes sufficiently high. It is designated by the maximum permissible value of power frequency voltage which it can support across its line and earth terminal while still carrying effectively and without the automatic extinction of the followup current. One rod is connected to the line circuit and the other rod is.
Polymer arrester outline drawings contd porcelain arrester outline drawings mm for specifications on class 3, 4 and 5 ratings, please refer to the tables on pages 7 to 15. Lightning arrester ratings the rating of a lightning arrester is given below, normal or rated voltage. The application and selection of lightning arresters. Horn gap lightning arrester it consist two horn shaped metal rod a and b separated by a small air gap. 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. The catalogues list the available standard arresters from abb of porcelainhoused arresters type exlim and silicone polymerhoused arresters, type pexlim. Between it and the horn is a resistance and a choke coil.