The NDTTS-II Transformer Comprehensive Test Bench is suitable for power supply and distribution systems, transformer manufacturing plants, industrial and mining enterprises, and other units. This test bench integrates multiple test functions for transformers, featuring various capabilities such as test control, monitoring, measurement, and protection. The system is characterized by its simple and intuitive operation, reliable performance, and accurate measurement data. It can accurately measure the no-load loss, no-load current, load loss, impedance voltage, transformation ratio group, and winding DC resistance of transformers, and automatically converts these to no-load loss at rated voltage, load loss at rated current and temperature, and the percentage of impedance voltage. Additionally, the system can safely and reliably perform power frequency withstand voltage tests, induced withstand voltage tests, and temperature rise tests for transformers, providing reliable data for transformer inspection or repair and manufacturing.