Join us on a literary world trip!
Add this book to bookshelf
Write a new comment Default profile 50px
Subscribe to read the full book or read the first pages for free!
All characters reduced
Introduction to Power System Protection - cover

Introduction to Power System Protection

Dr. Hedaya Alasooly

Publisher: BookRix

  • 0
  • 0
  • 0


Power system protection systems have three basic components: Instrument transformers, Relays, Circuit breakers
The function of the CT is to reproduce in its secondary winding a current I' that is proportional to the primary current I. The CT converts primary currents in the kiloamp range to secondary currents in the 0–5 ampere range for convenience of measurement.
The function of the relay is to discriminate between normal operation and fault conditions. The OC relay in Figure 2 has an operating coil, which is connected to the CT secondary winding, and a set of contacts. When |I'| exceeds a specified ''pickup'' value, the operating coil causes the normally open contacts to close. When the relay contacts close, the trip coil of the circuit breaker is energized, which then causes the circuit breaker to open.
System-protection components have the following design criteria:

- Reliability: Operate dependably when fault conditions occur, even after remaining idle for months or years. Failure to do so may result in costly damages.
- Selectivity: Avoid unnecessary, false trips.
- Speed: Operate rapidly to minimize fault duration and equipment damage. Any intentional time delays should be precise.
- Economy: Provide maximum protection at minimum cost.
- Simplicity: Minimize protection equipment and circuitry. 
Since it is impossible to satisfy all these criteria simultaneously, compromises must be made in system protection.
The book consists from the following sections:

- Chapter 1: Power System Faults:
- Chapter 2: Instrument Transformers.
- Chapter 3: Overcurrent and Earth Fault Protection Relays.
- Chapter 4: Radial System Protection.
- Chapter 5: Zones of Protection.
- Chapter 6: Differential Relays.
- Chapter 7: Distance Relays.
- Chapter 8: Transformer Protection.
- Chapter 9: Generator Protection.
- Chapter 10: Busbar Protection.
- Chapter 11: Circuit Breakers.
- Chapter 12: Fuses.
- Chapter 13: References.
Available since: 05/16/2022.
Print length: 102 pages.

Other books that might interest you

  • ColdFusion Presents: New Thinking - From Einstein to Artificial Intelligence the Science and Technology That Transformed Our World - cover

    ColdFusion Presents: New...

    Dagogo Altraide

    • 0
    • 0
    • 0
    The creator of YouTube’s ColdFusion explores the development of technology from Industrial Revolution to Artificial Intelligence to figure out what’s next. 
    As each new stage of technology builds on the last, advancements start to progress at an exponential rate. In order to know where we’re headed, it’s essential to know how we got here. What hidden stories lie behind the technology we use today? What drove the men and women who invented it? What were those special moments that changed the world forever? 
    Dagogo Altraide explores these questions in a history of human innovation that reveals how new technologies influence each other, how our modern world came to be, and what future innovations might look like. From the electric world of Tesla and the steam engine revolution to the first computers, the invention of the internet, and the rise of artificial intelligence, New Thinking tells the stories of the men and women who changed our world with the power of new thought.
    Show book
  • Genome - The Story of the Most Astonishing Scientific Adventure of Our Time—the Attempt to Map All the Genes in the Human Body - cover

    Genome - The Story of the Most...

    Jerry E. Bishop, Michael Waldholz

    • 0
    • 0
    • 0
    An “invaluable [and] highly readable” account of the quest to map our DNA, the blueprint for life—and what it means for our future ( The Philadelphia Inquirer).Genome tells the story of the most ambitious scientific adventure of our time. By gradually isolating and identifying all the genes in the human body—the blueprint for life—scientists are closing in on the ability to effectively treat and prevent nearly every disease that strikes man, from muscular dystrophy, diabetes, and cancer to heart ailments, alcoholism, and even mental illness.   Such discoveries will change the course of human life. At the same time, they raise profound ethical questions that have tremendous implications: Can insurance companies demand genetic tests to determine who poses a health risk? Should parents be able to choose their baby’s sex or eye color? Will employers screen out potential employees who are genetically susceptible to occupational health problems?   An exciting true tale of discovery that is revolutionizing our world, Genome helps us understand our future.
    Show book
  • Good Blood - A Doctor a Donor and the Incredible Breakthrough that Saved Millions of Babies - cover

    Good Blood - A Doctor a Donor...

    Julian Guthrie

    • 0
    • 0
    • 0
    The New York Times–bestselling author of How to Make a Spaceship presents the remarkable, uplifting story of a life-saving medical breakthrough. 
    In 1951 in Sydney, Australia, a fourteen-year-old boy named James Harrison was near death when he received a transfusion of blood that saved his life. A few years later, and half a world away, a shy young doctor at Columbia University realized he was more comfortable in the lab than in the examination room. Neither could have imagined how their paths would cross, or how they would change the world. 
    In Good Blood, Julian Guthrie tells the gripping tale of the race to cure Rh disease, a horrible blood disease that caused a mother’s immune system to attack her own unborn child. The story is anchored by two very di?erent men on two continents: Dr. John Gorman in New York, who would land on a brilliant yet contrarian idea, and an unassuming Australian whose almost magical blood—and his unyielding devotion to donating it—would save millions of lives. 
    Good Blood takes us from research laboratories to hospitals, and even into Sing Sing prison, where experimental blood trials were held. It is a tale of discovery and invention, the progress and pitfalls of medicine, and the everyday heroics that fundamentally changed the health of women and babies.
    Show book
  • Get Things Done Now! - cover

    Get Things Done Now!

    Amy Applebaum

    • 0
    • 0
    • 0
    A guided meditation designed to help you get sh*t done, so you can make things happen!Starting today we will train your mind to enjoy the process of taking action. Today you are adopting the belief that taking action is something you LOVE because you know that it leads to feeling accomplished. It leads to completing tasks and projects. It leads to success in all areas of your life. It leads to inner peace and happiness. So let’s get to it!Get Things Done NOW has been carefully designed to help you move past the fears and nasty thoughts that have held you back including so that you can start making things happen immediately.This guided meditation comes with two valuable ‘extras’:1.	2 different endings. Besides the actual guided meditation itself, you will receive a choice of a ‘sleep’ or ‘wake’ ending depending on whether you are listening in the morning or evening.2.	A deep sleep music track. If you choose a sleep ending, this track will help deepen your sleep after you have completed your meditation session. Hi:) I’m Amy Applebaum. And I’m really glad you are here!As a business owner who has made millions and a Life Success coach who has coached dozens of ambitious women (and some men), I believe very strongly that success is just as much about ‘how you think’ as it is ‘what you do’.Success is first and foremost an Inside Job.I have seen it in my own life.I’ve seen it with the entrepreneurs and industry leaders I have worked with whose lives have been wildly transformed just by changing their thoughts and then taking actions on those new beliefs.Let’s face it. We have a lot on our plate. And those of us who are running our own businesses even more so.We are giving so much to the world around us.But things won’t shift until we get those birds on our shoulders to stop the negative chitchat.And the best fastest way to cut the self-doubt in its tracks is through meditation.And I make doing meditation dead easy.My MOVE collections are guided meditations.You don’t have to learn the ‘ins and outs ’of meditation. All you need to do is throw those earbuds in and drift off to sleep!Downloaded over 500,000 times on places like iTunes and Audible, my MOVE meditations don’t just ‘relax’ and distress, they are specifically designed to help you get MOVING and unstuck.So that you can finally live the life you have always wanted!“I must say I am so impressed with how well this is working for me. I use it every morning before I start my day and I have found I am more motivated than I have been in a very long time. I am no longer procrastinating on things that I don’t want to do. Rather, approaching them with a whole new mindset. It feels great to accomplish those tasks and as a result, I have more confidence in my daily life. Thank you!”              ~ Zeph22Isn’t it time? Isn’t it time to set aside the roadblocks that are impeding you from making things happen?And it’s so easy.Just put the earbuds in and listen.Nothing simpler.All you need to do to open the door to getting things done the EASY wayis waiting for you here.
    Show book
  • Segregation by Design - Local Politics and Inequality in American Cities - cover

    Segregation by Design - Local...

    Jessica Trounstine

    • 0
    • 0
    • 0
    Segregation by Design draws on more than 100 years of quantitative and qualitative data from thousands of American cities to explore how local governments generate race and class segregation. Starting in the early twentieth century, cities have used their power of land use control to determine the location and availability of housing, amenities (such as parks), and negative land uses (such as garbage dumps). The result has been segregation—first within cities and more recently between them. Documenting changing patterns of segregation and their political mechanisms, Trounstine argues that city governments have pursued these policies to enhance the wealth and resources of white property owners at the expense of people of color and the poor. Contrary to leading theories of urban politics, local democracy has not functioned to represent all residents. The result is unequal access to fundamental local services—from schools, to safe neighborhoods, to clean water.
    Show book
  • How to Be a Wildflower - A Field Guide - cover

    How to Be a Wildflower - A Field...

    Katie Daisy

    • 0
    • 1
    • 0
    A field guide to finding calm, creativity, and self-discovery through encounters with nature.  
    A fresh perspective, an outdoor exploration, a new adventure about to begin—How to Be A Wildflower is a book for celebrating these and other wide-open occasions. Encouraging self-discovery through encounters with nature, beloved artist Katie Daisy brings her beautiful paintings and lettering to this collection of things to do and make, quotes, meditations, natural history, and more. 
    Find wonder and inspiration in these peaceful pages, live life to the fullest, and discover the wild and free spirit within.  
    “For pure whimsy, you just can’t beat How to Be a Wildflower: A Field Guide by Katie Daisy. The Bend, Oregon, artist brings her beautiful paintings and lettering to this delightful book, a collection of nature-inspired quotations, meditations, lore, and even a recipe for fresh strawberry-rhubarb pie.” —Traditional Home
    Show book