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    Slow Contact Opening Circuit Breakers
    Slow Contact Opening Circuit Breakers
    Slow Contact Opening Circuit Breakers
    Ebook313 pages2 hours

    Slow Contact Opening Circuit Breakers

    By Kesorn Pechrach

    ()

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    About this ebook

    New results in this book show that at the point at which the arc root moves from the contact region, the driven flow could dominate the arc root commutation from the contact region. The arc root contact time analysis and modelling of the magnetic forces lead to able to estimate the minimum forces that moved the arc root from the contact region. The minimum force for the arc to move from the contact region, with contact opening velocities between 1 m/s and 10 m/s, was approximately 0.2 N. The short circuit current showed a significant influence on the movement of the arc root and the magnetic forces on the contact area and the arc root contact time is decreased as the contact gap increases for contact velocities below 2.2 m/s. The contact opening velocity has a significant influence on the mobility of the arc root from the contact region. The arc root motion depended upon the quantity of the flow and area of the arc chamber venting.

    LanguageEnglish
    PublisherPechrach Publishing
    Release dateJul 12, 2019
    ISBN9781393808381
    Slow Contact Opening Circuit Breakers

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      Book preview

      Slow Contact Opening Circuit Breakers - Kesorn Pechrach

      Dr. Kesorn Pechrach

      Slow Contact

      Opening

      Circuit Breakers

      Dr. Kesorn Pechrach

      Pechrach Publishing

      England

      Slow Contact Opening Circuit Breakers 

      By Dr Kesorn Pechrach

      ISBN 978-0-9931178-6-2

      Pechrach Publishing

      7 Boundary Road, Bishops Stortford, Hertfordshire, CM23 5LE, England, United Kingdom. Tel: (+44) 1279 508020, +44(0) 7779913907

      Published 2015 by Pechrach Publishing

      Copyright © 2015 Kesorn Pechrach and Pechrach Publishing

      The right of Kesorn Pechach to be identified as the author of this work has been asserted in accordance with section 77 and 78 of the Copy right, Designs and Patents Act 1988

      All right reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior permission of the publishers.

      Every reasonable attempt has been made to identify owners of copyright. Errors or omissions will be corrected in subsequent edition. Although the authors and publisher have made every effort to ensure that the information in this bookwas correct at the time of going to press, the authors and publisher do not assume and hereby disclaim any liability to any party for any loss, damage, or disruption caused by errors or omissions.

      This book is dedicated to my sister,

      Somjan Pechrach.

      Acknowledgments

      I would like to thank my beautiful son, Neran J. Pechrach Weaver and my amazing husband, Dr. P. M. Weaver for enthusiasm advice, suggestion and non-stop supporter while I was writing this book. 

      Many Thanks to my awesome family in Thailand for their continuous support, understanding and encouragement.

      I would like to thank Prof. J.W. McBride for showing me a new way of life.

      My best friends P.G. Wheeler and P.W. Wilkes for their cheerfully supply all manufacturing mechanical and electrical parts for experiments.

      Thanks to Dr. J. Swingler, Prof. N. Ben Jemaa, Prof. Sawa and Prof. Suleiman M Sharkh for their suggestion and recommendations throughout this work

      Finally, I would like to thanks my support and backup team: Rajiya Sultana, Anna Wlodarczyk and Kanae Jinkerson.

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