How does a transformer oil gas analyzer support diagnostics?

A transformer oil gas analyzer measures dissolved fault gases such as hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, and carbon dioxide. By tracking gas levels and ratios, it helps identify fault types including partial discharge, thermal overheating, and arcing. Online analyzers provide early warning and trend data, while laboratory analyzers support detailed investigation. Gas analysis is a cornerstone of transformer condition monitoring and supports risk based maintenance strategies.