🔌 Power Transformer: Voltage Regulation, Losses and Efficiency (2D phasor view)

2D equivalent-circuit and phasor view of a 1400 kVA power transformer. Set load, power factor, leading or lagging load, tap position, primary voltage, copper and iron losses and short-circuit impedance and read the secondary voltage, regulation, losses and efficiency, with the efficiency peak where copper loss equals iron loss. Four in-page numerical checks; companion to the 3D transformer cutaway.