What does the increasing presence of acetylene gas in dissolved gas analysis of transformer oil indicate?

The increasing presence of acetylene gas in dissolved gas analysis of transformer oil indicates potential electrical arcing or overheating within the transformer. Acetylene is typically generated during the breakdown of insulation materials or when there are high-energy discharges. Monitoring acetylene levels is crucial for diagnosing issues, as it can signal imminent failure or the need for maintenance to prevent catastrophic failures in power transformers.