Under what condition would adjusting a no load tap changer be deemed unnecessary?

Adjusting a no load tap changer is deemed unnecessary when the voltage is stable. The primary function of a tap changer is to adjust the voltage output of a transformer in response to changes in load conditions or voltage levels. If the voltage is stable, it indicates that the system is not experiencing significant fluctuations or variations that would require adjustment. In such cases, maintaining the current tap position is sufficient, allowing the transformer to operate efficiently without the need for intervention.

In scenarios where the transformer is under heavy load, continuous operation, or where voltage readings are fluctuating, adjustments may be necessary to manage the voltage output effectively and ensure reliable operation of the electrical system.