Serveron – Acetylene: Hot Metal Gases

A Qualitrol Serveron TM8 monitor was installed on a transmission transformer at a US utility in 2016. Transformer operation was typical and stable for several years. At 9pm on December 19, 2018 the TM8 alarmed for increasing concentration of Acetylene. Upon reviewing the full DGA data it was observed that Acetylene and other hot metal gases were being generated at a significant rate. The online DGA data revealed gases had started rising just 24 hours earlier. Immediately upon alarm levels of gas being detected the monitor automatically switched into an accelerated sampling rate (from 6 times per day to 24 times per day), generating very detailed resolution on gas generation.

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