In a transformer, the secondary terminals X3, X2, X1 from left to right represent what type of polarity?

In a transformer, the secondary terminals X3, X2, X1 from left to right represent additive polarity. This means that when the winding direction of the transformer is taken into account, the voltage at terminal X1 is added to the voltage at terminal X2, and the voltage at terminal X2 is added to the voltage at terminal X3. This configuration is often used in transformers to ensure proper phase relationships between the voltages in the secondary winding.

In electrical theory, additive polarity refers to the way the voltages are phased in relation to each other in the windings of the transformer. In this case, if the voltages at these terminals are combined, they will result in a higher potential, indicating that the terminals are connected in a way that supports this additive configuration.

The other types of polarity referenced do not accurately describe the relationship of the terminal voltages in an additive scenario. Subtractive polarity, for instance, would imply that one voltage subtracts from another, which is not applicable here. Alternating polarity does not describe the static reference of the terminals, and neutral does not apply as it indicates a lack of electrical charge rather than a specific relationship between the terminal voltages.