This is two winding device. Functioning of this device is to step up or to step down the voltage as per require voltage.
There are a two type basic raw materials.
C.R.G.O. / C.R.N.G.O. silicon steel laminations.
Copper winding .
We design in such a manner to produce the flux & convert the voltage in secondary winding.
Copper winding are in two stages.
1. Primary winding
2. Secondary winding
If the required voltage is lower than supply voltage then its work as step down transformer. If required voltage is higher than supply voltage then its works as a step up transformer. Transformer ratings always consider in KVA. The ratings are depends on input & output voltages & current delivered by the unit.