What does the transformer oil sludge test evaluate?

The transformer oil sludge test evaluates the presence and concentration of sludge and particulate matter in transformer oil. This sludge can result from the degradation of oil and insulation materials, indicating potential issues such as overheating or moisture ingress. By analyzing the sludge, technicians can assess the condition of the transformer, determine the need for maintenance, and predict the remaining lifespan of the insulating oil, ensuring optimal performance and reliability of the power transformer.