In which winding is the tap changer located in a transformer?

The tap changer is typically located in the primary winding of a transformer. This component allows for the adjustment of the voltage levels by changing the number of turns in the transformer winding that are utilized. By altering the connection points (taps) on the primary winding, the transformer can compensate for varying load conditions or voltage fluctuations in the system.

Locating the tap changer on the primary winding is particularly effective because it directly influences the voltage transformation ratio as input voltage conditions change. This adjustment helps maintain voltage stability and improves the overall efficiency of power transmission.

While other windings may play critical roles in transformer operations, the primary winding is essential for these voltage adjustments. Additionally, the secondary winding, which delivers power to the load, generally does not necessitate the same level of adjustment as the primary side, making it less suitable for tap changers in standard transformer designs. Grounding and neutral windings primarily serve safety and balance functions rather than voltage regulation.