2. A 4600 to 230 Volts, 60 Hz step down transformer has a core dimension of 3.00 by 4.40 inches. A maximum flux density of 60,000 lines/in^2 is to be used. Assuming a 9% loss of area due to stacking factor of laminations.

A 3-phase, 50 Hz, oil cooled core type transformer has the following dimensions: Distance between core centres = 0.2 m, Height of window = 0.24 m Diameter of circumscribing circle = 0.14 m. The flux density in the core- 1.25 Wb/m². The current density in the conductor 2.5 A/mm². Assume a window = space factor of 0.2 and the core area factor 0.56. The core is 2-stepped. Estimate kVA rating the transformer