The discussion focuses on the impact of increased magnetizing current on the power factor of transformers. It establishes that the no-load current consists of a magnetizing component and a winding loss component. An increase in magnetizing current, particularly when the supply voltage exceeds the laminate saturation point, leads to a decrease in power factor due to an increase in phase angle. The copper resistance and magnetic field leakage reactance do not sufficiently counterbalance this effect, resulting in a lower power factor.
PREREQUISITESElectrical engineers, power system analysts, and anyone involved in transformer design and optimization will benefit from this discussion.
Yes , you are right the power factor will decrease .. Actually we can analyse it from the phasor diagram of transformer at no-load.. if Im (magnetizing current) increase , the phase angle will increase , so consequently power factor will decrease..!Babadag said:the power factor could decrease more.