Leakage Reactance of Transformer :-

Almost all the flux in transformer should not be capable to link with both the primary and secondary windings . A small amount of flux will link either winding but not both . This part of flux known as leakage flux . Because of this leakage flux in transformer there will be a self - reactance in the concerned winding . This self-reactance of transformer is alternatively generally known as leakage reactance of transformer . This self - reactance associated with resistance of transformer is impedance . As a result of this impedance of transformer there will be voltage drops in both primary and secondary transformer windings .