Equivalent Circuit Of Transformer At No Load. At that time the reading of wattmeter connected on the low voltage side gives the no load loss or core losses of the transformer and no load impedance of transformer theory. But using this equivalent.
The equivalent circuit obtained by the oc test is shown below. I w supplies for the no load losses and is assumed to flow through the no load resistance which is also known as core loss resistance r o. Equivalent circuit of transformer φ mutual i 1 i 2 v 1 n 1 e 1 e 2 n 2 v 2 load fig.
This test is performed to find series branch parameters of an equivalent circuit such as equivalent impedance z o1 or z o2 total winding resistance r o1 or r o2 and total leakage reactance x o1 or x o2.
The equivalent circuit of transformer is shown in the figure. Short circuit test on transformer. Here r 01 r 1 r 2 and x 01 x 1 x 2 are the total equivalent resistance and reactance of the transformer referred to as primary. Where i m magnetizing component i o sin φ o and i w core loss component i o cos φ o.
