AC MACHINES-1 (66761) Theory

4. Understand equivalent circuit of transformer, magnetic leakage and leakage reactance of transformer.

4.7. Calculate leakage reactance of transformer in terms of primary and in terms of secondary.

What is meant by leakage inductance?
Leakage inductance in a transformer is an inductive component that results from the imperfect magnetic linking of one winding to another. In an ideal transformer, 100% of the energy is magnetically coupled from the primary to the secondary windings. ... This series inductance is the "leakage inductance."
Where equivalent impedance of transformer referred to secondary, can be derived as

approximate equivalent circuit of transformer referred to secondary