What does high acetylene in transformer oil indicate?

High acetylene levels in transformer oil indicate potential electrical arcing or overheating within the transformer. Acetylene is a byproduct of the breakdown of insulation materials and can signal severe faults, such as partial discharge or localized overheating. Monitoring acetylene concentrations is crucial for assessing the health of the transformer and preventing catastrophic failures. Regular testing and analysis of transformer oil can help identify these issues early and facilitate timely maintenance actions.