Question 1
Design a 15kVA core type, oil-cooled, 3-phase transformer with a voltage rating
of 11000/400V. The flux density 1.7T must be used and per turn voltage must
be 81 Volt/turn. Calculate:
(a) The cross-section area of the core.
(b) Number of turns of each winding.
(c) The full load current of both LV and HV windings.
(d) Cross-sectional area of the copper conductor (use max current density of
2.5mm2/A for copper)