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Q1) Fig Q1 shows a ring main of total length 1000 m and resistance (go + return) of 0.002 Ω/m. The ring main is supplied with 240 V D.C. and the following loads are connected to the ring at distances measured clockwise from the supply point:

i) 60 A at 200 m

ii) 90 A at 500 m

iii) 150 A at 700 m

Calculate EACH of the following:

(a) The currents in sections AB and AD; (6)

(b) The lowest voltage across any of the three loads; (5)

(c) The total power loss in the ring main. (5)