The essential parts of a transformer are as follows:
i.Magnetic circuit consisting of laminated iron core and clamping structure
ii.Primary winding
iii.Tank filled with insulating oil
iv.HT terminals with bushings
v.LT terminals with bushings
vi. Conservator tank
vii. Breather
viii.Vent pipe
ix. Thermometer
Sir send me a D.G & transformer details & power factor