- 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.