Which winding of the transformer has less cross-sectional area?
Which winding of the transformer has less cross-sectional area?
Right Answer is:
High Voltage Winding
SOLUTION
- The number of turns on the primary and secondary windings depends upon their respective voltages.
- We know that current density is defined as the ratio of current to perpendicular cross-section area through which current is crossing.
- The value of current density of HV winding is more in comparison to LV winding because of better cooling of HV winding
- Since HV winding is placed far from the core in Comparison to LV winding which is placed near to the core.
- Current density is inversely proportional to the area of the core so the thin wire is used for HV winding.
- Also as the resistance of winding is inversely proportional to the area of cross-section, the area of high voltage winding is less compared to low voltage winding.
- Therefore HV winding has Low cross-sectional area.
- A high-voltage winding has far more turns than a low-voltage winding.
- On the other hand, the current in a high-voltage winding is much smaller, enabling us to use a smaller size conductor.
- The result is that the amount of copper in the primary and secondary windings is about the same.