Usually, the arrester is connected between system and ground in parallel with protected equipment. An atmospheric deflagration occurs in the open air. Abb surge arresters are the primary protection against atmospheric and switching over voltages. The application and selection of lightning arresters. 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. They are capable of only stopping the leftover voltage surge which got past the grounding system and the lightning arrester. Safety protect your process with the proper flame arresters. Lightning arrester ppt free download as powerpoint presentation. Ppt smfps 2018 the difference between a positioning system and personal fall arrest system is that the positioning system supports the worker on an elevated surface and limits a fall to 2 ft. They differ only in constructional details but operate on the same principle, providing low resistance path for the surges to the round.
We provide sustainable solutions that help our customers effectively manage electrical, hydraulic and mechanical power more safely, more efficiently and more reliably. For ease of reference, we have described them as surge arresters or only arresters for all types. A prevolume deflagration takes place within a confined volume. Water hammer arresters shall have sufficient volume of air to dissipate the calculated kinetic energy generated in the piping system. A device used on power system in high voltage line, to protect electrical equipments from lightning and switching surge. However, arresters cannot and are not expected to limit temporary overvoltages. Arresters shall be effective when installed at any angle.
This includes basic information on the topics of technology and electronics that applies to all of us. Understanding the arrester datasheet nema arresters. The surge impedance of the line restricts the amplitude of. Surge diverter lightning arrester working lightning. 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. Lightning and surge protection basics from the generation of surge voltages right through to a comprehensive protection concept. Positioning systems must be secured to an anchor point capable of supporting at least twice the potential impact load of a workers fall or 3,000 lbs. There are several types of lightning arresters in general use.
A lightning arresters or a surge diverter is a protective device which conducts the high voltage surges on the power system to the ground. Find powerpoint presentations and slides using the power of, find free presentations research about surge arresters ppt. Design of lightning arresters for electrical power systems. The basics of surge protection the basics of surge protection. Continued from article complete overview of lightning arresters part 2. A fixtureunit a quantity in terms of which the load producing effects on the plumbing system of different kinds of plumbing fixtures are expressed on some arbitrarily chosen scale. Explanation fixture unit sizing and selection table is used to. 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. Modern electrical systems tend to be vulnerable to voltage surges of any kind, so arresters have become more necessary.
Disadvantage of surge arrester conducting surge arrester blow fuses. Surge arrester presentation free download as powerpoint presentation. Under unfavourable circumstances, damage due to water hammer may occur in pipelines measuring more than one hundred metres and conveying only several tenths of a litre per second. Only authorized and trained employees would have access.
Water hammer arrestor typical branch line riser rule 1covers multiple fixture branch lines which do not exceed 20 feet length. In this brochure, you will gain an insight into the field of surge protection. Each piece of electrical equipment in an electrical system needs to be protected from voltage surges. In almost every industry, there are areas where workers are subjected to fall hazards. Definition as per ieee standards as per ieee standards, surge lightning arrester is a protective device for limiting surge voltages on the equipment by diverting surge. The lightning arresters or surge diverter provide protection against such surges. A good quality supplier will fully disclose the relevant data in a format that is comprehensible and userfriendly. Presentation of methods for assessing surge arrester.
Water hammer arresters shall be ansiasse 1010 2004 certified. Analysis of major changes to arrester standard iec 600994 2015 inmr world congress october 18 21 munich, germany steve brewer senior product manager hps arrester business unit. Stabilized burning is an even, steady flame that is stabilized at or near the flame arrester element. Lightning arrester ppt insulator electricity electrical substation. Protect your process with the proper flame arresters p figure 1. Part of selecting a good quality arrester is understanding the published data. View and download powerpoint presentations on surge arresters ppt. Check insulator withstand capability of the housing use paragraph 8. How does lightning arrestors works operation how to. 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. Advantage of surge arrester in transformer the surge arrester protects the transformer and other electrical equipment from lighting and switching surge 20. The metal oxide lightning arrester is the most advanced over voltage protector. Abb offers a complete range of surge arresters for high voltage applications comprising of solutions for ac and dc up to 1,100kv as well as special applications.
Westech flame arresters westech industrial has been working in the petrochemical industry for over 50 years and is a leading manufacturer of inline deflagration and detonation flame arresters. Clamp the over voltage down below the bil of the equipment 3. Surge arrester placement for substation lightning protection. This fixtureunit table below table ii conforms with this definition and is derived from the. Many factors like system voltages, basic impulse insulation level, arrestor rating, station layout. The equipment quenches flame propagation through independent passive operation and. Thyrite is a brand name from general electric, usa. The arrestor provides a conducting path to the waves of relatively low impedance between the line and the ground. The basics of surge protection we dont just want to support you with convincing solutions, but also to be on hand with help and advice. Once inside, a method of fall protection must be implemented for the authorized worker. This paper presents an overview of how the lightning strikes and their e ects on power distribu. Fences, barricades, and locked doors, whether inside the facility or outside, can be used to prevent unauthorized access to areas where a fall hazard exists.
Specification drainage engineering guide water hammer. Arresters effect, therefore, involves lightning and switching overvoltages2. Arresters shall be approved for installation with no access panel required. Types of lightning arresters for outdoor application. Surge arresters form a critical component in the safe and reliable operation of. Safe and reliable protection of electrical equipment. Surge arresters are voltage limiting devices used to protect electrical. Metaloxide surge arresters in highvoltage power systems.
The location of the water hammer arrestor shown above applies to branch lines that do not exceed 20 ft. This practice is best defined by two rules which have been established to cover the placement of water hammer arrestors. A guide to surge arrester selection, application, maintenance and testing. Metrosil is a brand name from a gec company in the uk. Locations of switching surges line energization energy requirements shunt bank restrike energy requirements.
Surge arrester presentation insulator electricity electric current. They cannot protect your electronic devices by themselves. Installed on a lifeline, the mobile fall arresters follow the user automatically as he moves, whether on an inclined or vertical surface. Modern surge arrester technology and inservice testing.
The switching surge and arresters contents introduction the switching surge defined sources of switching surges traveling waves breaker, switch or disconnect switch. This article is a guide to understanding the arrester datasheet and what is behind it. The question as to whether a transient flow or surge analysis is necessary during the planning phase or not is less readily answered. Lightning arresters catch surges in electrical wiring and divert them to grounding cables, which direct the current into the ground. They must instead be designed to withstand the continuous system operation voltage without sustaining damage. Iec 600995 about diagnostic indicators of metal oxide surge arresters in service. Lightning arrester should be located close to the equipment that it is expected to protect. Ieeeiec lightning arrester arresters for ac and dc applications. Scribd is the worlds largest social reading and publishing site. Pdf performance of surge arrester installation to enhance. Analysis of major changes to arrester standards iec 600994.
Isea use and selection guide personal fall protection equipment 1 a comprehensive fall protection program prevents injuries, saves lives and makes good business sense. When lightning strikes a line protected with a lightning arrester, the nonlinear resistance draws the current to ground. If you use any part of this presentation for training material, please give. Pdf the effects of abnormal voltages on power system equipment and appliances in. Pdf this research presents the electrical performance of metaloxide surge arresters with polymeric housing, applied on the power distribution.