Isolated neutral or ungrounded system.

The main feature of an unrounded neutral system is its ability,in some cases,to clear ground faults without interruption.This self clearing feature disappears when the length of line becomes appreciable.The main feature of an isolated neutral system are: In the event of a ground fault,the voltage s across healthy phases becomes equal to line to line values,and arcing grounds may occur. The ground fault current is limited to capacitive ground fault current.The use of ground fault relaying is d...