What is the polarity of secondary terminals on a transformer ordered from X3 to X1 from left to right?

The polarity of secondary terminals on a transformer is determined by the way the windings are connected. In transformers, particularly in the context of three-phase systems, specific terminal connections can create either additive or subtractive voltage relationships depending on the phase rotation and winding configuration.

In this case, the designation of terminals from X3 to X1 signifies an arrangement that follows an additive connection pattern where voltages at these terminals add constructively. When voltages are additive, it means that the phase voltages aligned in the positive direction increase the overall output voltage, allowing for potentially higher voltage outputs based on the sum of the individual phase voltages.

This additive configuration is crucial for ensuring that system requirements for voltage and phase relationships are met in electrical systems that utilize transformers to modify voltage levels. Understanding the significance of terminal designations and their connections helps in correct wiring and ensuring devices function as intended within power systems.