Per Unit Resistance, Leakage Reactance And Impedance Voltage Drop
Full-load voltage of a transformer can be expressed as a fraction of the full-load terminal voltage.
Let I1fl be the full-load primary current, I2fl be the full-load secondary current, V1 be the rated pri-mary voltage and V2 be the rated secondary voltage.
Per unit resistance drop of a transformer
Per unit reactance drop of a transformer
Per unit reactance drop of a transformer is called per unit reactance and it is given by
Per unit impedance drop of a transformer is called per unit impedance and it is given by