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A 1500kVA , 6.6 kVA 3- phase star connected alternatorhas effective armature resistance of 0.5 ohms per phase and a synchronous reactance of 5 ohms per phase. find the percentage change in terminal voltage when the rated output of 1500 kVA at

i) Unity power factor;

ii)0.8 lagging pf; is switched off.

Assume the speed and excitation remains unchanged.

Electrical & Electronics, Engineering

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