Two similar 6,600V, 3phase generators are running in parallel on constant voltage and frequency bus bars. Each has an equivalent resistance and reactance of 0.05? and 0.5? respectively and supplies one half of a total load of 10,000kW at a lagging pf of 0.8, the two machines being similarly excited. If the excitation of one machine be adjusted until the armature current is 438A and the steam supply to the turbine remains unchanged, find the armature current

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