Advantages of Three Phase System over Single Phase System

Three section system is widely utilized in the generation, transmission, and distribution. Single section system is barely wont to operate little electrical appliances at shopper ends wherever the ability rating is incredibly less. a number of the benefits of 3 section system or point in time systems compared to one section system is explained below

Presently 3-ø AC system is very popular and being used worldwide for power generation, power transmission, distribution and for electric motors.

3 phase system has the following advantages as compared to a single phase system:

01. For electrical power transmission and distribution of same quantity of power, the necessity of conductor material is a smaller amount in 3-ø system as compare to 1-ø system.

02. Let us take into account the facility made by single part provide and 3-phase provide at unity power issue. the wave of power turn out due 1-phase provide at unity power issue is shown in figure (C), and figure (D) shows the wave of power made thanks to 3-phase provide.

03. From power waveforms shown in figure (C) and (D) on top of it’s clear that within the 3-phase system, the fast power is sort of constant over the cycle leads to swish and vibration-free operation of the machine. Whereas in 1-ø system the fast power is rhythmical thence amendment over the cycle, that results in vibrations in machines.

04. Power to weight quantitative relation of 3-ø generator is high as compared to 1-ø generator. meaning for generation for an equivalent quantity of Electrical Power, the dimensions of 3-ø generator is tiny as compared to 1-ø generator. Hence, the general value of the associate degree generator is reduced for generation of an equivalent quantity of power. Moreover, thanks to the reduction in weight, transportation, and installation of generator become convenient and fewer area is needed to accommodate the generator in powerhouses.

05.  The 3-phase induction motor is self-started because the magnetic flux created by the 3-phase offer is rotating in nature with a continuing magnitude. Whereas 1-ø induction motor isn’t self-started because the magnetic flux created by the 1-ø offer is beating in nature. Hence, we’ve to create some arrangement to create the 1-ø induction motor self-started that more will increase the price of the 1-ø induction motor.

06. DC corrected from 3-phase offer has the ripple issue four-dimensional and DC corrected from 1-ø offer has the ripple issue forty eight.2%. Mean DC corrected from 3-ø offer contains fewer ripples as compare to DC corrected from a 1-ø offer. therefore the need of the filter is reduced for DC corrected from a 3-phase offer. that cut back the general value of device.

07. Power to weight quantitative relation of 3 section induction motor is high as compare to single section induction motor. means that for the identical quantity of Mechanical Power, the scale of 3 section induction motor is little as compared to single section induction motor. Hence, the general price of the induction motor is reduced. Moreover, because of reduction in weight, transportation, and installation of induction motor become convenient and fewer area is needed to accommodate the induction motor.

08. In a single part system, the instant power could be a performance of your time. thence fluctuates with relevance time. The unsteady power can cause vital vibrations within the single part macthe hines. thence the performance of single part machines is poor.