Q7.25 (c) A small town with a demand of of electric power at is situated away from an electric plant generating power at . The resistance of the two wire line carrying power is per km. The town gets power from the line through a step-down transformer at a sub-station in the town. Characterise the step up transformer at the plant.
The total resistance of the two-wire line
RMS Current in the wireline
Voltage drop in the power line =
Total voltage transmitted from the plant = 3000+4000=7000
as power is generated at 440V, The rating of the power plant is 440V-7000V.