Purpose Of Neutral Wire In 3 Phase

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.

Purpose of neutral wire in 3 phase. There s a couple reasons and they are both the same as having a neutral in a single phase circuit. Our load 3 phase motor with contactor controller requires an neutral line for the control circuit which our power supply is not provided. Therefore the total neutral current is the vector sum of the three line currents under balanced conditions the vector sum is zero and. A three wire three phase circuit is usually more economical than an equivalent two wire.

It is a type of polyphase system and is the most common method used by electrical grids worldwide to transfer power. In the real world there is no perfectly balanced 3 phase system. The power flowing in a transmission system is unusable. A transmission system doesn t have any load connected to it directly.

The neutral points in both alternator and the load are joined together. Thus imbalance 3 phase system will have neutral current and the proportional voltage drop along the wire. We have a 440 volts 3 phase supply line a b c that i do not know what configuration delta or wye. The main function and purpose of neutral wire in electrical circuit is to provide a return path for current in single phase supply.

That is why most of the time when neutral voltage is measured against the local earth there will be a voltage mostly around 6 volts for the 415 volt 3 phase systems. The neutral is an insulated wire because it is part of the circuit which flows electrical current. It does not have a neutral line. One reason is that a neutral provides a second voltage option.

White read the following note after the three phase codes for explanation. It is also used to power large motors and other heavy loads. They are the same i e. The grounded electrode conductor.

The earth electrodes to be inter connected to reduce earth resistance. Neutral conductor of a 3 phase 4 wire system and the middle conductor of a 2 phase 3 wire system to have minimum two separate and distinct earth connections with a minimum of two different earth electrodes to have the earth resistance to a satisfactory value. In the above diagram the alternator is connected to the load by three phase four wire system. For wow reaction check the common neutral and 3rd phase colors.

Three phase transmission system. Three phase electric power is a common method of alternating current electric power generation transmission and distribution. A to b line to line gives you 208v but a or b to n line to neutral gives you 120. The single phase supply is 100v line to neutral and three phase supply is 200v 3 lines no neutral.