What does high acetylene in transformer oil indicate?

High acetylene in transformer oil indicates potential internal arcing or electrical discharge within the transformer, which can suggest insulation failure or overheating issues. The presence of acetylene, a product of the breakdown of transformer oil, often signifies unintentional electrical activity that can lead to further degradation of the insulation system. It is essential to monitor and analyze these levels regularly to prevent catastrophic failures and ensure the longevity and reliability of the transformer. Proper maintenance practices, including testing and oil regeneration, can help address the root causes of high acetylene in transformer oil and mitigate associated risks.