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Engineering · Electrical Engineering
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Consider a 11kV medium-voltage feeder supplying ns distribution transformers at a distance Lo from each other. The distributed impedance of the feeder is (HJx Ω/km, and r 0.1 Ω/km, x 0.2Ω/km. The maximum current can be taken by each distribution transformer is Io at a power factor cosp. (a) Find the maximum number of transformers nmax, if the maximum voltage drop IS AU max (10 marks) (b) Determine the maximum number of transformers and the maximum feeder (10 marks) (10 marks) length, given Lo 100 n,10-504, and Δ Umax as 10% of the nominal voltage. (c) Determine voltage drop per km assume total currentI-1.5kA, and cosp-0.8. Lo Medium-voltage cable Io, cos<p ns transformers in totalThx!

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