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Purpose of Protective Relays and Relaying

Causes of Faults—Definitions—Functions of Protective Relays—Application to a Power System
  • A. R. van C. Warrington

Abstract

THE capital investment involved in a power system for the generation, transmission and distribution of electrical power is so great that the proper precautions must be taken to ensure that the equipment not only operates as nearly as possible to peak efficiency, but also that it is protected from accidents. The normal path of the electric current is from the power source through copper (or aluminium) conductors in the generators, transformers and transmission lines to the load and it is confined to this path by insulation. The insulation, however, may be broken-down, either by the effect of temperature and age or by a physical accident, so that the current then follows an abnormal path generally known as a short-circuit or fault. Whenever this occurs the destructive capabilities of the enormous energy of the power system may cause expensive damage to the equipment, severe drop in voltage and loss of revenue due to interruption of service. Such faults may be made infrequent by good design of the power apparatus and lines and the provision of protective devices, such as surge diverters and ground fault neutralisers, but a certain number will occur inevitably due to lightning and unforeseen accidental conditions.

Keywords

Power System Circuit Breaker Protective Relay Electrical Quantity Protected Circuit 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    A.I.E.E. Relay Committee. ‘Bibliography of Relay Literature’, re-published 1927–39, 1940–43, 1944–46, 1947–49, 1950–52, 1953–54, 1955–56, 1957–58,Google Scholar
  2. 1a.
    A.I.E.E. Relay Committee. ‘Bibliography of Relay Literature’, Transactions A.I.E.E., 60, 1941, pp. 1435–47;CrossRefGoogle Scholar
  3. 1b.
    A.I.E.E. Relay Committee. ‘Bibliography of Relay Literature’, Transactions A.I.E.E., 63, 1944, pp. 705–709;CrossRefGoogle Scholar
  4. 1c.
    A.I.E.E. Relay Committee. ‘Bibliography of Relay Literature’, Transactions A.I.E.E., 67, Part I, 1948, pp. 24–27;CrossRefGoogle Scholar
  5. 1d.
    A.I.E.E. Relay Committee. ‘Bibliography of Relay Literature’, Transactions A.I.E.E., 70, Part I, 1951, pp. 247–250;CrossRefGoogle Scholar
  6. 1e.
    A.I.E.E. Relay Committee. ‘Bibliography of Relay Literature’, Transactions A.I.E.E., 74, Part II, 1955, pp. 45–48;Google Scholar
  7. 1f.
    A.I.E.E. Relay Committee. ‘Bibliography of Relay Literature’, Transactions A.I.E.E., 76, Part III, 1957, pp. 126–128;Google Scholar
  8. 1g.
    A.I.E.E. Relay Committee. ‘Bibliography of Relay Literature’, Transactions A.I.E.E., 78, Part III, 1959, pp. 78–81.Google Scholar
  9. 2.
    Adamson, C. ‘Electronic Protection of Power Systems’, Electrical Times, London, Part I, June 20th, 1957;Google Scholar
  10. 2a.
    Adamson, C. ‘Electronic Protection of Power Systems’, Electrical Times, London, Part II, July 25th, 1957;Google Scholar
  11. 2b.
    Adamson, C. ‘Electronic Protection of Power Systems’, Electrical Times, London, Part III, October 3rd, 1957;Google Scholar
  12. 2c.
    Adamson, C. ‘Electronic Protection of Power Systems’, Electrical Times, London, Part IV, November 7th, 1957;Google Scholar
  13. 2d.
    Adamson, C. ‘Electronic Protection of Power Systems’, Electrical Times, London, Part V, February 27th, 1958;Google Scholar
  14. 2e.
    Adamson, C. ‘Electronic Protection of Power Systems’, Electrical Times, London, Part VI, March 6th, 1958.Google Scholar
  15. 3.
    Holm, J. G. ‘Costs Study of 69–346 kV Overhead Power Transmission Systems’, Transactions A.I.E.E., 63, 1944, pp. 406–422.CrossRefGoogle Scholar
  16. 4.
    Davidson, L. A. and Hines, V. M. ‘A Relay Designed to Meet Automatic Reclosing Requirements of Ring Bus Station’, Transactions A.I.E.E. Paper, 60–1267.Google Scholar
  17. 9.
    Warrington, A. R. van C. ‘A Condensation of the Theory of Relays’, G. E. Review, 4, No. 9, September, 1940.Google Scholar

Copyright information

© Albert Russell van Cortlandt Warrington 1968

Authors and Affiliations

  • A. R. van C. Warrington
    • 1
  1. 1.The English Electric Company LimitedStaffordUK

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