Transformers are the heart of electrical power systems, and ensuring their performance and safety is vital to the stability of the entire power grid. Among the various tests carried out during transformer manufacturing and maintenance, turns ratio testing plays a crucial role. A transformer's turns ratio, the ratio between the number of windings in the primary and secondary coils, directly affects voltage transformation and load balancing. Even a slight deviation can be an early indicator of internal faults, winding damage, or insulation failure.