Which of the following losses varies with the load in the transformer?
Right Answer is:
Load loss (also called copper loss) is associated with full-load current flow in the transformer windings. Copper loss is power lost in the primary and secondary windings of a transformer due to the ohmic resistance of the windings. Copper loss varies with the square of the load current. (P = I2R).
- Copper loss is due to the ohmic resistance of the transformer windings.
- The copper loss for the primary winding is I12 × R1 and for secondary winding is I22 × R2.
- Where I1 and I2 are current in primary and secondary winding respectively.
- R1 and R2 are the resistances of primary and secondary winding respectively.
- It is clear that Cu loss is proportional to the square of the current, and current depends on the load. Hence copper loss in the transformer varies with the load.