9. A 230/460 V, transformer has a primary resistance of 0.2 2 and leakage reactance of 0.5 12 and a corresponding values for the secondary are 0.75 2 and 1.8 22 respectively. Find the secondary terminal voltage when supplying (a) 10 A at 0.8 pf lagging and (b) 10 A at 0.8 pf leading.
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N1/N2 =V1/V2 (Turns Ratio)
Where N is the number of turns in the coil and V is the voltage across the coil. Subscript 1 denotes primary side and subscript 2 denotes secondary side.
Therefore N2=N1*(V2/V1)
N2=1000*(400/250)
N2= 1600 turns.
1600 turns are required in the secondary coil to induce a voltage of 400V in the secondary side when the primary side
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