We are generating the power by generator in Three phase
system. These three phases can be connected in star or
delta connection. In case of stare connection there is a
neutral point of three phases. In normal condition the
voltage and current flow from neutral is zero. But in the
case of short circuit or during any fault there is flow of
current and voltage in neutral. Generally the neutral is
mostly used for protection purpose and in the case of
single phase and neutral connection, the neutral is used
for return path.
If an inductor is connected across a load it makes one
phase.If three such systems are connected either in star on
delta across a common load it is called a three phase
system.If a system is connected in star ie the finish point
of three inductors are connected together, the common point
is known as neutral.
IT IS BASICALLY WINDING OF GENERATOR IN GENERATING
STATION,WHERE WE GENERATE ELECTRICITY.THE COMMON POINT OF
THREE WINDING(IN THREE PHASE SYSTEM)IS CALLED NEUTRAL
POINT.IT IS BASICALLY CONNECT TO EARTH AND HAVE A ZERO
POTENTIAL. AND PHASE HAS SOME POTENTIAL ACCORDING TO
phase is the part of circuit which is at highest potential...a current flow occurs if phase comes in contact with a low potential circuit path or conductor.. the neutral just acts as a return path..neutral's potential is zero..for power transmission both are required..