21/11/2020

Function of Earthing Conductor in Overhead lines

 

Earthing conductor

The galvanized steel conductor is generally used as earthing conductor.

There are two methods of providing earthing conductor for transmission line

( 1 ) Continuous earthing conductor provided over the transmission line

  • It provides continuous low resistance path for earth leakage current necessary for protection system
  • To reduce effect of induced voltage for adjacent communication lines under fault conditions

( 2 ) Individual earthing conductor at each pole

  • It does not provides continuous return path for earth current but it reduces the effect of induced voltage for adjacent communication lines under fault conditions

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