Flux Leakage. Main article: Leakage inductance
Main article: Leakage inductance
The ideal transformer model assumes that all flux generated by the primary winding links all the turns of every winding, including itself. In practice, some flux traverses paths that take it outside the windings. Such flux is termed leakage flux, and manifests itself as self-inductance in series with the mutually coupled transformer windings. Leakage results in energy being alternately stored in and discharged from the magnetic fields with each cycle of the power supply.
It is not itself directly a source of power loss, but results in poorer voltage regulation, causing the secondary voltage to fail to be directly proportional to the primary, particularly under heavy load.  Distribution transformers are therefore normally designed to have very low leakage inductance.
Transformer universal EMF equation
R1=1.56k; R2=0.061; x1=4.67; x2=0.048
No load I=0.96A at p.f. of 0.263. Calculate equivalent circuit parameters referred to High voltage side.