why is a short-circuit test in the case of transformers done with the high-voltage side only?

A short-circuit test on transformers is performed using the high-voltage side to ensure safety and practicality. This approach allows for the application of a lower current on the high-voltage side, minimizing the risk of damage and hazards. Additionally, it simplifies the test setup, as the low-voltage side would require higher currents, potentially leading to overheating and complications. Thus, testing the high-voltage side provides accurate impedance measurements while maintaining safety.