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Numericals on Resistance, reactance, impedance, iron loss and copper loss of transformer.
Things covers in this video is Numericals on Resistance of transformer and Numerical on reactance of transformer and Numerical on impedance of transformer and Numerical on iron loss and copper loss of transformer
The numerical solved in this video are based on Transformer equivalent resistance example and Transformer equivalent reactance numerical and Transformer iron loss example and Transformer copper loss numerical.
The Numerical solved here are as mentioned below
The resistance and reactance of the primary winding of a 440/110 V single phase transformer are 4.4 ohm and 8 ohm while those of the secondary winding are respectively 1.6 ohm and 2 ohm. Find the equivalent resistance, reactance and impedance referred to primary winding.

The primary winding resistance and the reactance of the a 1100/440 V single phase transformer are 8 ohm and 18 ohm, while the resistance and reactance of the secondary winding are respectively 1.5 ohm and 2.6 ohm.
Find,
Resistance and reactance of secondary winding referred to the primary side.
Resistance and reactance of primary winding referred to the secondary side.
Equivalent resistance, reactance and impedance of the whole transformer referred to the primary side.
Equivalent resistance, reactance and impedance of the whole transformer referred to the secondary side.

The iron loss and full load copper loss of a 100kVA transformer are 3kW and 4kW respectively. Find efficiency at Full load 0.8 power factor, Half-full load 0.707 power factor and 1/4 load unity power factor


Question for You to solve is based on Transformer losses numericals and Transformer equivalent resistance numerical and Transformer examples.

The iron loss of a 25 kVA single phase transformer are 600w and the copper loss at half full load are 300W. Find its efficiency at full load 0.7 power factor and 3/4 load at unity power factor

The primary winding resistance and the reactance of the a 1200/400 V single phase transformer are 9 ohm and 28 ohm, while the resistance and reactance of the secondary winding are respectively 3.5 ohm and 4.6 ohm.
Find,
Resistance and reactance of secondary winding referred to the primary side.
Resistance and reactance of primary winding referred to the secondary side.
Equivalent resistance, reactance and impedance of the whole transformer referred to the primary side.
Equivalent resistance, reactance and impedance of the whole transformer referred to the secondary side.

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