What are the technical aspects of how to check transformer oil?

To check transformer oil, focus on key technical aspects such as dielectric strength, moisture content, and dissolved gas analysis (DGA). Dielectric strength tests assess the oil’s insulating properties, typically requiring a sample to be tested in accordance with ASTM D877. Moisture content can be measured using Karl Fischer titration. DGA involves analyzing gas concentrations to detect potential faults. Regular sampling and testing ensure the transformer operates efficiently and safely.