IEC 61936 is an international standard for power transformers, published by the International Electrotechnical Commission (IEC). The standard covers the requirements for power transformers used in power transmission and distribution systems.

IEC 61936 is an important standard for the power transformer industry, as it provides a globally recognized framework for the design, construction, and testing of power transformers. Compliance with the standard helps to ensure the reliability, safety, and efficiency of power transformers, which are critical components of power transmission and distribution systems.