[Main] Function and Purpose of Neutral Wire in Electrical Circuit
The main function and purpose of Neutral Wire in Electrical Circuit is to provide a return path for current in single phase supply. In this article, we will discuss the main function of Neutral Wire and the purpose of neutral wire in Electrical Circuit with a detail explanation.
We know that, generally, we
generate, transmit and sometimes distribute electrical power in the form of
three phase system. So if we know the basics of the three-phase system, we can
easily understand the purpose of neutral wire in the electrical circuit. So
let's look at the three-phase system.
Most of the cases, in fact,
the most amount of electrical power generating station such as thermal power
station, gas power station, hydropower stations uses the three-phase
alternator. Those three-phase alternators have a total of three windings at 120
degrees apart inside them. Each winding has two terminals so the total
terminals are six.
Now those windings are can
be connected in two manners either in Star connection or Delta connection. The
winding connections are given below.
As you see in the above
figure there is no neutral point in delta connection, so we have taken only the
star connection to better understand.
As you see in the above
figure, we can get two voltages from the star connection, one is phase voltage and another is
line voltage.
We get the phase voltage
between a line and neutral. So you may understand what is the uses of the
neutral wire. We will not get phase voltage without a neutral wire.
The function of Neutral Wire
So the main functions of
Neutral Wire are,
1.
To get
the phase voltage from a three-phase supply neutral wire is required because we
only get the phase voltage between one line terminal and neutral terminal.
2.
The
neutral wire helps to complete the circuit in case of a single phase supply.
3.
Neutral
is generally connected to earth to balance the total electrical system and many
other important purposes which are already explained in the previous article,
Advantages of Earthing.
4.
The
neutral wire helps to measure the voltage across the individual windings inside
an alternator. Suppose we want to measure the voltage across a winding of an
alternator. So, in this case, we must connect the voltmeter's one terminal to
the neutral terminal and another terminal to the rest terminal of that
winding.
- [Actual] Purpose and Function of Earth Wire
- Main Purpose of Using Neutral Grounding Resistor
- Main Difference Between Earthing and Grounding
- [Explained] Does Neutral Wire Give Electrical Shock or Not?
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[Main] Function and Purpose of Neutral Wire in Electrical Circuit
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