Equivalent circuit parameters of a 30 KVA 2200/380V 50Hz Δ / Y bond three-phase transformer are given as R1=0.36Ω X1=0.76Ω R2=0.2Ω X2=0.1Ω RcH=11kΩ and XmH=3kΩ. Find the total iron and copper losses, efficiency and voltage regulation when loaded with a power factor of 0.86. Draw the phasor diagram.
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