To have complete details regarding the level of regulation that is required in a transformer, it is important to note that courtesy to resistance amount as well as leakage reactance, a certain amount of voltage drop takes place within a transformer. Hence, the conditions associated with output voltage when placed under a load are different from output voltage that is placed in a no-load condition.
When placed against a load, changes that are associated with secondary voltage levels are removed comparatively. As per scientific conditions, it is important for a good transformer to ensure that their secondary terminal voltage should be kept consistent, irrespective of load conditions that are placed on it.
If the general formats of transformer regulation are to be followed, it ids primary voltage that has to be kept in a constant mode. However, in case of secondary terminals changes were allowed. In case of loaded transformers, the amount of secondary terminal voltage level falls, so to keep the level of circuit voltage consistent, the amount of primary voltage is increased.
If there has to be an increase in standards of primary voltage, so as to maintain the rates of output voltage, the condition has to be a transition regarding no-load to the full-load scenario. In this case, the given factor of power is to be placed in regards to percentage levels gives a certain amount of transformer regulation levels.