Electrical testing (electricity lines and grids)

The main tests carried out to diagnose and characterise the condition of overhead and underground
power lines are shown below:

  • Conductor resistance
  • Screen resistance
  • Dielectric strength of the sheath
  • Partial discharges in conductors and terminals
  • Main insulation status evaluation: Tan delta test
  • Overhead power line impedance
  • Phase sequence and ringing
  • Underground line tracing


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