Three phase system outline engineering essay

Three-phase voltage systems are composed of three sinusoidal voltages of equal magnitude, equal frequency and separated by 120 degrees, as shown in Figure 2. It is one voltage cycle of a 3 phase system.

Further, depending on the application, AC Power can be delivered in either a Single Phase or a Three Phase system. A Single Phase AC Power system consists of two wires known as the phase (or sometimes a Line or Live or Hot) and the neutral wire.

In high voltage 3 phase distribution situations it is common not to have a neutral wire as the loads can simply be connected between phases (phase-phase connection). Three phase system is better to single phase system. The reason for the advantage over single phase system is given below.

In case a three phase system, you use either three wires or four wires for transmitting power (no neutral in three wire three phase power and all the three wires are phases). Let us now go into the details of single phase and three phase systems and also see the difference between single phase and three phase power supplies.