Tuesday, 20 December 2011


Advantages of neutral grounding

  • Voltages of phases are limited to "phase to ground" voltage.

  • High Voltages due to arcing grounds or or transient line to ground faults are eliminated.

  • Sensitive protection relays against L-G faults can be used.

  • Overvoltages due to lightening are discharged to ground.

Advantages of isolated neutral

  • It is possible to maintain supply with fault on one line.

  • Interference with communication lines is reduced because of no Z sequence currents.

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