What is the IEC loading guide for oil-immersed power transformers?

The IEC loading guide for oil-immersed power transformers provides standardized methods for determining the thermal loading limits of transformers under various operating conditions. It outlines the relationship between ambient temperature, oil temperature, and load current, ensuring that transformers operate within safe thermal limits. This guide helps in optimizing transformer performance, extending service life, and preventing overheating, thereby enhancing reliability in power distribution systems.