What is the IEC 60156 standard for transformer oil?

The IEC 60156 standard for transformer oil specifies the test methods for determining the breakdown voltage of insulating liquids, particularly transformer oil. This standard outlines procedures to assess the electrical strength of transformer oil, which is crucial for ensuring the reliability and safety of power transformers. By adhering to IEC 60156, manufacturers and operators can evaluate the quality and performance of transformer oil in electrical applications.