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Answer Posted / diptish
A neutral is a return path for the normal current. It may
be trough earth or floating depending on the usage of the
power system. In case of earthed neatrals, the return
current flows through earth. How ever earthing is also done
in two cases. One in the neutral earthing, which is
explained above. The second is the body earthing, which is
done to flow the fault current to earth, which activates
the prtective devices and causes a trip of the system in
fault conditions. Without proper earthing the protective
devices can not work.
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