© 2019

Switching Equipment

  • Hiroki Ito


  • Everything you need to know about switches in a high-voltage system

  • The cumulative knowledge of numerous experts in the CIGRE Study Committee A3 in one place

  • Insights into the fundamental switching behaviour in energy systems for practitioners and for the electrical industry

  • The basics of DC circuit breakers, controlled switching, residual current limiting devices and future technologies

Reference work

Part of the CIGRE Green Books book series (CIGREGB)

Table of contents

  1. Front Matter
    Pages i-xl
  2. Hiroki Ito, Frank Rene Richter, Heinz Helmut Schramm
    Pages 1-10
  3. Lou van der Sluis, Nenad Uzelac
    Pages 11-62
  4. Hiroki Ito, Denis Dufournet
    Pages 63-81
  5. Hiroki Ito, Denis Dufournet, Anton Janssen
    Pages 83-156
  6. Harley Wilson, Denis Dufournet, Hubert Mercure, Russ Yeckley
    Pages 157-198
  7. Denis Dufournet, Daisuke Yoshida, Sebastian Poirier, Harley Wilson
    Pages 199-237
  8. René Smeets
    Pages 239-270
  9. Daisuke Yoshida, Marta Lacorte
    Pages 271-294
  10. Robert Le Roux, Tadao Minagawa
    Pages 325-342
  11. René Smeets
    Pages 343-378
  12. Jay Prigmore, Nenad Uzelac
    Pages 399-432
  13. Hiroki Ito, André Mercier, Mark Waldron
    Pages 433-482
  14. Robert Le Roux, Kevin Kleinhans
    Pages 483-502
  15. Hiroki Ito
    Pages 503-538
  16. Anton Janssen, Magne Runde, Dirk Makareinis, Carsten Protze, Ankur Maheshwari, Antonio C. Carvalho et al.
    Pages 539-570
  17. Lou van der Sluis, Hiroki Ito
    Pages 571-584

About this book


This CIGRE Green Book provides the entire know-how about switches in a high voltage system. The switching equipment includes circuit breakers, vacuum interrupters, disconnecting switches, and earthing switches used in AC & DC transmission and distribution systems. The Green book describes different switching equipments and their roles in the power systems. It explains the fundamental switching behaviors in power systems targeted for practitioners and students and joining electrical industries. The Green book also covers fundamental specific subjects including DC circuit breakers, controlled switching, fault current limiting devices and future technologies.

Like all Green books, this book covers the cumulative understanding of numerous experts in the CIGRE study committee. It offers the approved and outstanding practical knowledge of CIGRE Study committee A3 and was collected by Dr. Hiroki Ito.


Circuit Breaker Vacuum Interrupter Disconnecting Switch Earthing Switch Switching Phenomena Controlled Switching Fault Current Limiters HVDC switching equipment

Editors and affiliations

  • Hiroki Ito
    • 1
  1. 1.Energy and Industrial Systems GroupMitsubishi Electric CorporationTokyoJapan

About the editors

CIGRE Study Committee A3 facilitates and promotes the progress of engineering and the international exchange of information and knowledge in the field of high voltage equipment. Its goal is to add value to this information and knowledge by means of synthesizing state-of-the-art practices and developing recommendations.

Hiroki Ito joined Mitsubishi Electric Corporation in 1984, where he had engaged in the research and development of high voltage DC and AC gas circuit breakers. From 1989 to 1991, he worked in the Coordinated Science Laboratory at the University of Illinois. In 1994, he received his Ph.D. from the Tokyo Institute of Technology, Japan. He was the technical director of Mitsubishi Electric High Voltage and High Power Testing Laboratories from 2005 to 2012. He is currently the Senior Chief Engineer of Energy and Industrial System Center, Mitsubishi Electric. In CIGRE, he was the convener of CIGRE WG A3.22 and 28 that investigated the specifications of UHV substation equipment. He is also a member of IEC 62271-310 MT40: Electrical endurance tests of circuit breakers, and IEC 62271-302: Controlled switching. From 2012 to 2018, he has been the Chairman of CIGRE Study Committee A3: High voltage equipment.

Bibliographic information

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