Relay

Author : Anthony M. Sleva
Publisher : CRC Press
Page : 368 pages
File Size : 48,7 Mb
Release : 2018-09-03
Category : Technology & Engineering
ISBN : 9781420014174

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Protective Relay Principles by Anthony M. Sleva Pdf

Improve Failure Detection and Optimize Protection In the ever-evolving field of protective relay technology, an engineer’s personal preference and professional judgment are as important to power system protection as the physical relays used to detect and isolate abnormal conditions. Invaluable Insights from an Experienced Expert Protective Relay Principles focuses on probable power system failure modes and the important characteristics of the protective relays used to detect these postulated failures. The book presents useful new concepts in a way that is easier to understand because they are equally relevant to older, electromechanical and solid-state relays, and newer, more versatile microprocessor-based relays. It introduces the applications, considerations, and setting philosophies used in transmission-line, distribution-line, and substation applications, covering concepts associated with general system operations and fault detection. Topics include relay load limits, cold load pickup, voltage recovery, and arc flash. The author also delves into the philosophies that engineers employ in both urban and rural areas, with a detailed consideration of setpoint function. Analysis of Key Concepts That Are Usually Just Glossed Over This versatile text is ideal for new engineers to use as a tutorial before they open the instruction manuals that accompany multi-function microprocessor-based relays. Guiding readers through the transient loading conditions that can result in relay misoperation, the author elaborates on concepts that are not generally discussed, but can be very helpful in specific applications. Readers will come away with an excellent grasp of important design considerations for working with overcurrent, over- and undervoltage, impedance, distance, and differential type relay functions, either individually or in combination. Also useful for students as a textbook, this book includes practical examples for many applications, and offers guidance for more unusual ones.

Author : A.R. van C. Warrington
Publisher : Springer Science & Business Media
Page : 470 pages
File Size : 53,9 Mb
Release : 1977
Category : Technology & Engineering
ISBN : 0412153807

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Protective Relays Their Theory and Practice by A.R. van C. Warrington Pdf

This book should be of interest to electrical system protection engineers and postgraduate students.

Author : Yifei Yuan
Publisher : Springer Science & Business Media
Page : 197 pages
File Size : 49,8 Mb
Release : 2012-07-25
Category : Technology & Engineering
ISBN : 9783642296765

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LTE-Advanced Relay Technology and Standardization by Yifei Yuan Pdf

LTE-Advanced relay technology and standardization provides a timely reference work for relay technology with the finalizing of LTE Release 10 specifications. LTE-Advanced is quickly becoming the global standard for 4G cellular communications. The relay technology, as one of the key features in LTE-Advanced, helps not only to improve the system coverage and capacity, but also to save the costs of laying wireline backhaul. As a leading researcher in the field of LTE-Advanced standards, the author provides an in-depth description of LTE-A relay technology, and explains in detail the standard specification and design principles. Readers from both academic and industrial fields can find sections of interest to them: Sections 2 & 4 could benefit researchers in academia and those who are engaged in exploratory work, while Sections 3 & 4 are more useful to engineers. Dr. Yifei Yuan is the Technical Director at the Standards Department of ZTE Inc.

Author : J. Th Appels,B. H. Geels
Publisher : Springer
Page : 331 pages
File Size : 53,9 Mb
Release : 2013-12-11
Category : Science
ISBN : 9783662400173

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Handbook of Relay Switching Technique by J. Th Appels,B. H. Geels Pdf

Author : Vladimir Gurevich
Publisher : CRC Press
Page : 704 pages
File Size : 45,7 Mb
Release : 2018-10-03
Category : Technology & Engineering
ISBN : 9781420026412

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Electric Relays by Vladimir Gurevich Pdf

Electric relays pervade the electronics that dominate our world. They exist in many forms, fulfill many roles, and each have their own behavioral nuances and peculiarities. To date, there exists no comprehensive reference surveying the broad spectrum of electric relays, save one-Electric Relays: Principles and Applications. This ambitious work is not only unique in its scope, but also in its practical approach that focuses on the operational and functional aspects rather than on theory and mathematics. Accomplished engineer Dr. Vladimir Gurevich builds the presentation from first principles, unfolding the concepts and constructions via discussion of their historical development from the earliest ideas to modern technologies. He uses a show-not-tell approach that employs nearly 1300 illustrations and reveals valuable insight based on his extensive experience in the field. The book begins with the basic principles of relay construction and the major functional parts, such as contact and magnetic systems. Then, it devotes individual chapters to the various types of relays. The author describes the principles of function and construction for each type as well as features of several relays belonging to a type that operate on different principles. Remarkably thorough and uniquely practical, Electric Relays: Principles and Applications serves as the perfect introduction to the plethora of electric relays and offers a quick-reference guide for the experienced engineer.

Author : P. L. Atwater
Publisher : Unknown
Page : 28 pages
File Size : 50,6 Mb
Release : 1986
Category : Electric motors, Synchronous
ISBN : UCR:31210024757815

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Design and Application of Synchronous Motor Field Application Relays for Havasu and Flatiron Pump Units by P. L. Atwater Pdf

Author : A. R. van. C. Warrington
Publisher : Springer Science & Business Media
Page : 498 pages
File Size : 48,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9781468464597

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Protective Relays by A. R. van. C. Warrington Pdf

1. Purpose of Protective Relays and Relaying. Causes of Faults. Definitions. Functions of Protective Relays. Application to a Power System.- 2. Relay Design and Construction. Characteristics. Choice of Measuring Units. Construction of Measuring Units. Construction of Timing Units. Details of Design. Cases. Panel Mounting. Operation Indicators. Finishes.- 3. The Main Characteristics of Protective Relays. Phase and Amplitude Comparators. Relay Characteristics. General Equation for Characteristics. Inversion Chart. Resonance. Appendix.- 4. Overcurrent Protection. Time-Current Characteristics. App.

Author : Roozbeh Parsa
Publisher : Stanford University
Page : 134 pages
File Size : 52,5 Mb
Release : 2011
Category : Electronic
ISBN : STANFORD:cx159fk0768

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Nanoelectromechanical Relays for Low Power Applications by Roozbeh Parsa Pdf

CMOS scaling has been very successful in generating small, fast, low cost electronics. However, in advanced CMOS nodes, the total power consumption is dominated by the static power dissipation, which is caused greatly by gate leakage, short channel effects, and finite subthreshold slope. Further scaling of CMOS only exacerbates these problems. Nanoelectromechanical (NEM) relays are promising devices for assisting CMOS systems by reducing the static power dissipation due to their zero leakage current, infinite subthreshold slope, and scalable actuation voltage. Electrostatically-actuated NEM relays are devices where the operation is based on the deformation of a flexible beam under the influence of electrostatic force in order to create a conducting path between two electrodes. This work studies the fabrication process development of sidewall-coated laterally-actuated NEM relays. The developed process enables decoupling of the mechanical and electrical properties of the relay, allowing independent optimization of each property and paving the path for creating a back-end-of-line (BEOL) compatible process. Furthermore, a major failure mechanism of NEM relays is beam-to-gate shorting after actuation. To ameliorate this problem, new designs with improved mechanical properties were simulated and tested. These designs utilize a stiff electrode and a compliant beam to eliminate undesired beam deformation near the gate electrode. These results in addition to variation studies, stress outcomes, and basic logic functionality of the NEM relays are shown.

Author : Omar Salah Elsayed Atwa
Publisher : Academic Press
Page : 420 pages
File Size : 47,9 Mb
Release : 2019-05-10
Category : Technology & Engineering
ISBN : 9780128173121

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Practical Power System and Protective Relays Commissioning by Omar Salah Elsayed Atwa Pdf

Practical Power System and Protective Relays Commissioning is a unique collection of the most important developments in the field of power system setup. It includes simple explanations and cost affordable models for operating engineers. The book explains the theory of power system components in a simple, clear method that also shows how to apply different commissioning tests for different protective relays. The book discusses scheduling for substation commissioning and how to manage available resources to efficiently complete projects on budget and with optimal use of resources. Explains the theory of power system components and how to set the different types of relays Discusses the time schedule for substation commissioning and how to manage available resources and cost implications Details worked examples and illustrates best practices

Author : J. Paul Guyer, P.E., R.A.
Publisher : Guyer Partners
Page : 39 pages
File Size : 52,9 Mb
Release : 2017-11-29
Category : Technology & Engineering
ISBN : 8210379456XXX

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An Introduction to Relays and Controls for Electric Power Distribution by J. Paul Guyer, P.E., R.A. Pdf

This publication provides introductory technical guidance for electrical engineers interested in relays and controls for electric power distribution systems. Here is what is discussed:1. RELAY FUNCTIONS 2. RELAY FUNDAMENTALS 3. RELAY CONSTRUCTION 4. RELAY MAINTENANCE PERIODS 5. RELAY GENERAL FIELD INSPECTION 6. RELAY PERFORMANCE TESTS 7. COMMON ELECTROMECHANICAL RELAY TESTS 8. RELAY TEST EQUIPMENT 9. RELAY REPAIRS 10. CONTROL FUNCTIONS 11. PREVENTIVE MAINTENANCE AND INSPECTIONS OF CONTROLS 12. TROUBLESHOOTING CONTROLS

Author : J. Paul Guyer, P.E., R.A.
Publisher : Guyer Partners
Page : 31 pages
File Size : 47,9 Mb
Release : 2023-03-24
Category : Technology & Engineering
ISBN : 8210379456XXX

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An Introduction to Electric Power Distribution Relays and Controls for Professional Engineers by J. Paul Guyer, P.E., R.A. Pdf

Introductory technical guidance for electrical engi​​​​​​​neers interested in relays and controls for electric power distribution systems. Here is what is discussed: n1. RELAY FUNCTIONS, 2. RELAY FUNDAMENTALS, 3. RELAY CONSTRUCTION, 4. RELAY MAINTENANCE PERIODS, 5. RELAY GENERAL FIELD INSPECTION, 6. RELAY PERFORMANCE TESTS, 7. COMMON ELECTROMECHANICAL RELAY TESTS, 8. RELAY TEST EQUIPMENT, 9. RELAY REPAIRS, 10. CONTROL FUNCTIONS, 11. PREVENTIVE MAINTENANCE AND INSPECTIONS OF CONTROLS, 12. TROUBLESHOOTING CONTROLS.

Author : John J. Macaloon
Publisher : Routledge
Page : 308 pages
File Size : 50,8 Mb
Release : 2013-10-31
Category : Sports & Recreation
ISBN : 9781317968894

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Bearing Light: Flame Relays and the Struggle for the Olympic Movement by John J. Macaloon Pdf

In recent decades, five to ten times as many persons have turned out for the Olympic flame relay as have watched Olympic sports contests live. Flame Relays and the Struggle for the Olympic Movement: Bearing Light, the first anthropological analysis of the contemporary torch relay, exposes and interprets the transformation of the ritual across a 25-year period, from Los Angeles 1984 through the IOC’s 2009 announcement that, in the aftermath of the politically contentious Beijing performance, there will be no more global relays. This volume offers a rare case study of continuity and change in a leading transnational and trans-cultural ritual form. Through data publicly revealed for the first time, the reader is carried fully backstage and into the conflicts and negotiations among Olympic organizing committees, the Greek Olympic movement, national governments, and transnational actors like the IOC, commercial sponsors, and operations management firms. Readers will come to know the leading flame relay authorities and practitioners, gaining a deeper understanding of the Olympic managerial revolution with its characteristic ‘world’s best practice’ language. Analysis of the transnational flow of Olympic operations management offers important corrections to much existing globalization theory by demonstrating both how powerful and how culturally and politically parochial world’s best practices can turn out to be. The dialectic between the cultural performance genres of ritual and spectacle provides a further intellectual architecture for these studies posing the question of whether the Olympic Movement will be able to survive the successes of the Olympic Sports Industry. This book was previously published as a special issue of Sport in Society.

Author : Layla Reyne
Publisher : Layla Reyne
Page : 253 pages
File Size : 48,9 Mb
Release : 2018-03-28
Category : Fiction
ISBN : 9781732088313

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Relay by Layla Reyne Pdf

Team captain and team celebrity square off in this enemies to lovers, second chance MM sports romance between two elite swimmers fighting against their hearts and fighting for Olympic gold. Team captain. Olympic medalist. Devoted son and brother. Alex has it all, and all the demands that go with being the best. The last thing he needs on his crowded plate—and on his team—is his closeted ex. Dane is swimming’s biggest star. Carefully crafted from crib to pool, his fame feeds his celebrity parents’ empire. He dropped the act once—the summer he fell in love with Alex. Ten years later, the performance is crushing his soul. So is resisting the man he still loves. As the team struggles to gel, Alex and Dane clash in and out of the pool. Forgive and forget is easier said than done. But something has to give, if Alex and Dane want a shot at gold. And a second chance at love. Relay is the first novel in the Changing Lanes series. For fans of Lauren Blakely, Sarina Bowen, and Kandi Steiner, Relay will have you cheering for the swoony sports romance heroes you can’t help but love.

Author : Bernhard Siegert
Publisher : Stanford University Press
Page : 348 pages
File Size : 43,5 Mb
Release : 1999
Category : Literary Collections
ISBN : 0804732388

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Relays by Bernhard Siegert Pdf

This book examines how one aspect of the social and technological situation of literature--namely, the postal system--determined how literature was produced and what was produced within literature. Language itself has the structure of a relay, where what is transmitted depends on a prior withholding. The social arrangements and technologies for achieving this transmission thus have had a particularly powerful impact on the imagination of literature as a medium. The book has three parts. The first part reconstructs the postal conditions of classic and Romantic literature: the invention of postage in the seventeenth century, which transformed the postal system into a service meant to be used by the population (instead of by the prince alone); the sexualization of letter writing, which was introduced in the middle of the eighteenth century and changed the reading of a letter into an interpretation of intimate confessions of the soul; and Goethe’s turning of this new ontology of the letter into a logistics of literature whereby literary authorship was constructed by means of postal logistics, with the precision of engineering. The second part analyzes nineteenth-century postal innovations that facilitated communication through letters and examines how literary works were able to live off such communication. These innovations included the reform of the post office; the invention of the postage stamp; the Universal Postal Union, which subjected letter writing to an economy of materials and uniform standards; and the telegraph and the telephone, which surpassed literature in terms of speed, economy, and analog-signal processing. In the third part, on the basis of a close reading of Franz Kafka’s letters to his typist-fiancée, the author demonstrates how postal logistics of love and authorship have worked in the era of modern postal systems and technical media. Kafka’s correspondence is deciphered as a "war of nerves” waged by means of all available techniques and conditions of transmission.

Author : Ramesh Bansal
Publisher : CRC Press
Page : 653 pages
File Size : 40,9 Mb
Release : 2019-01-15
Category : Technology & Engineering
ISBN : 9780429686788

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Power System Protection in Smart Grid Environment by Ramesh Bansal Pdf

With distributed generation interconnection power flow becoming bidirectional, culminating in network problems, smart grids aid in electricity generation, transmission, substations, distribution and consumption to achieve a system that is clean, safe (protected), secure, reliable, efficient, and sustainable. This book illustrates fault analysis, fuses, circuit breakers, instrument transformers, relay technology, transmission lines protection setting using DIGsILENT Power Factory. Intended audience is senior undergraduate and graduate students, and researchers in power systems, transmission and distribution, protection system broadly under electrical engineering.