Three phase transformer
Large scale generation of electric power is usually 3 phase
At generated voltages of 11KV or somewhat higher.
Transmission is generally accomplished at higher
Voltage of 22,220,500,750KV.
For which purpose 3-phase transformer are necessary
To step up the generated voltage to that of transition
Line.
Next, at load the transsimion voltage are reduced to
Distribution voltages of 6300,400,220,110V.
SO we need step up transformer at generation places
And step down transformer at distribution places.
Three phase transformer connection
]
(1) Star/star connection
(2) Delta/delta connection
(3) Star/delta connection
(4) Delta/star connection
