(a) Power supplied in the 1-phase system is pulsating, whereas the 3-phase system supplied constant power.
(b) The 3-phase system (among poly-phase system) is economical as compared to the 1-phase system.
(c) The output of 3-phase motors is nearly 1.5 times that of single phase motors of the same rating.
(d) 3-phase motors are superior to 1-phase motors for industrial applications.
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