4. A 3-phase ring distributor ABCD fed at A at 11 kV supplies balanced loads of 40 A at 0-8 p.f. lagging at B, 50 A at 0-707 p.f. lagging at C and 30 A at 0-8 p.f. lagging at D, the load currents...

Extracted text: 4. A 3-phase ring distributor ABCD fed at A at 11 kV supplies balanced loads of 40 A at 0-8 p.f. lagging at B, 50 A at 0-707 p.f. lagging at C and 30 A at 0-8 p.f. lagging at D, the load currents being referred to the supply voltage at A. The impedances per phase of the various sections are : Section AB = (1 + j 2)N Section CD = (1 + j l) Q Calculate the currents in various sections and station bus-bar voltages at B, C and D. Section BC = (2 + j 3) Q Section DA = (3 + j 4) Q [Current in AB = (53-8– j 46) amp ; BC = (21-8– j 22) amp. CD = (-13-55 + j 13-35) amp ; DA = (-40-55 - j 26-45) amp. V = (6212-5 -j 61-6) volts/phase ; Ve= (6103 – j 83) volts/phase Vp = (6129-8 – j 82-8) volts/phase] %3D