a) State two reasons why a three-phase system is preferred over a single-phase system for AC transmission and distributi

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A State Two Reasons Why A Three Phase System Is Preferred Over A Single Phase System For Ac Transmission And Distributi 1 (33.06 KiB) Viewed 14 times

a) State two reasons why a three-phase system is preferred over a single-phase system for AC transmission and distribution of electrical energy. [2 marks] b) me winding of a three-phase delta connected generator produce the following voltages:- Vab (t) = 353.6 cos (314.16t) V Vbc (t) = 353.6 cos (314.16t s(314.16t-2) 4π Vca (t) = 353.6 cos (314.16t - The generator feeds a balanced three phase delta-connected load with impedance of 20+j34.6 92 per phase. The impedance of the line connecting the generator to the load is 3+j4 92 per phase. Determine:- (i) The three line currents Laa, he and Icc [7 marks] (ii) The three-phase currents IAB, IBC and ICA at the load [2 marks] (iii) The total real power consumed by the delta connected load [2 marks] (iv) The capacitance per phase of a three-phase delta-connected capacitor bank required to be connected across the load terminals to achieve power factor of 0.98 lagging [5 marks] V