A 50 km long transmission line supplies a load of 5 MVA at 0·8 p.f. lagging at 33 kV. The efficiency of transmission is 90%.
Calculate the volume of aluminium conductor required for the line when
(i) single phase, 2-wire system is used
(ii) 3-phase, 3-wire system is used.
The specific resistance of aluminium is 2·85 × 10-8 Ω m.