The protection of overhead lines and cables by current-differential schemes

  • C. Christopoulos
  • A. Wright


Current-differential protective schemes, as stated earlier, have the great advantages that they can discriminate between faults within and external to their protected zones and can operate very rapidly when required to do so. Their basic principle, namely Kirchhoff ‘s first law, that the algebraic sum of the currents flowing into a healthy circuit is zero, is very simple.


Protected Zone Current Transformer Overhead Line Earth Fault Fault Setting 
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Copyright information

© Springer Science+Business Media Dordrecht 1999

Authors and Affiliations

  • C. Christopoulos
    • 1
  • A. Wright
    • 1
  1. 1.University of NottinghamNottinghamUK

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