What is the process of oil sampling for transformers?

The process of oil sampling for transformers involves several key steps to ensure accurate analysis. First, the transformer oil is allowed to settle to minimize particulate contamination. A clean, dry sampling device is then used to extract oil from a designated sampling point, typically at the top of the transformer to avoid sediment. The sample is collected in a clean container, labeled, and sealed to prevent contamination before being sent for laboratory analysis to assess the oil’s condition and properties.