rectifier transformers are special types of transformers that are designed for rectification systems. Rectification systems are systems that convert alternating current (AC) to direct current (DC), which is often required for various industrial applications, such as aluminum electrolysis, electric arc furnaces, traction substations, and high-voltage direct current (HVDC) transmission systems. In this article, we will explore the uses, characteristics, and service life of rectifier transformers, and evaluate whether they are worth buying.