Starting from the ideal transformer, obtain the approximate equivalent circuit
of a commercial transformer in which all the constants are lumped and represented on one side,
A l-phase transformer has a turn ratio of 6. The resistance and reactance of primary winding
are 0.9 Q and 5 2 respecitvely and those of the secondary are 0.03 12 and 0.13 12 respectively. If
330 - V at 50-Hz be applied to the high voltage winding with the low-voltage winding short-
circuited, find the current in the low-voltage winding and its power factor. Neglect magnetising
current
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