Main Components Of Power Transformers

In a typical transformer, the primary and secondary windings are concentrically wound on a single core column, with the low-voltage winding inside and the high-voltage winding outside. (In contrast, the primary and secondary windings of a welding machine transformer are mounted on separate core columns.)

When a transformer is operating under load, as the secondary current increases, the primary current must also increase accordingly to maintain a constant main magnetic flux in the core and balance the secondary current.

The secondary active power of a transformer is generally calculated as: Transformer rated capacity (KVA) × 0.8 (Transformer power factor) = KW.