Equivalent Circuit

Equivalent circuit of any electrical circuit is basically the electrical equivalent of the device. All the components of the device has to be replaced by their electrical equivalent and arranged properly. Look into the figure below:








One can easily understand that the resistances and inductive reactances in series represents the windings, respectively. The parallel branch of resistance and inductive reactance represents the core parameters. The question arises here why the resistances and reactances of the windings are represented as sereis connection whereas the same parameters of core is represented as parallel connection.