What are the effects of high carbon monoxide levels in transformer oil?

High carbon monoxide levels in transformer oil indicate potential thermal degradation or arcing within the transformer. This gas can form due to the breakdown of cellulose insulation or the oil itself under high temperatures. Elevated carbon monoxide levels can lead to insulation failure, reduced dielectric strength, and ultimately compromise the transformer’s operational reliability. Monitoring these levels is crucial for predictive maintenance and ensuring the longevity of power transformers.