Read the passage below:
In electrical power distribution, high-voltage substations rely on Dissolved Gas Analysis (DGA) to monitor transformer health without disrupting active service. Technicians extract dielectric oil samples to detect trace gases generated by internal thermal and electrical stresses. Elevated levels of hydrogen and methane typically indicate low-energy electrical discharges, whereas the presence of acetylene signals severe, high-temperature arcing faults within the core windings. Furthermore, excessive moisture dissolved in the insulating oil degrades its dielectric breakdown strength, accelerating cellulose insulation decay. Routine gas chromatography profiling enables maintenance teams to identify developing failures well before catastrophic insulation breakdown occurs.
Based on the passage, match each diagnostic condition or procedure from the text with its accurate paraphrased operational implication.
- Detection of acetylene within the dielectric fluidSignifies critical, intense thermal arcing within the internal coil windings.
- Rising concentrations of hydrogen and methanePoints to minor, low-intensity electrical discharge phenomena.
- Accumulation of dissolved moisture in the transformer oilImpairs insulating effectiveness and speeds up the breakdown of cellulose barriers.
- Routine chromatographic profiling of fluid samplesPermits early discovery of evolving structural flaws before catastrophic breakdown.