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A 5 to 1 ratio, step-down 1Ø transformer has 230/460 V secondary voltages. The secondary winding...

A 5 to 1 ratio, step-down 1Ø transformer has 230/460 V secondary voltages. The secondary winding being continuously wound but with the center tap brought out. Across one half of the winding is connected an induction motor drawing 50 A at 0.72 pf and 230 V. On the other half is connected an over-excited synchronous motor drawing 40 A at 0.9 pf and 230 V.

(a) Determine the current thru the center tap

(b) Assuming no-loss, determine the real power at the primary side

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Answer #1

b) To determine the meal power at the primany side, we will we powell icon delv. alion, P = Pa Vi 1.* 230 x 50/43.94 + 23 ex

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