Ryan Adams

Dissolved gases in transformer oil primarily include hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, carbon dioxide, and various hydrocarbon gases. These gases are mainly products of the thermal decomposition of the oil and insulation materials that can occur due to overheating or electrical arcing in transformers. Monitoring the concentration of these dissolved gases is crucial for identifying potential issues such as insulation failure or thermal degradation, and implementing effective maintenance and regeneration processes can help manage and mitigate risks associated with these dissolved gases in transformer oil.

Power Transformers: Used for long-distance high-voltage transmission, typically oil-filled for better cooling and insulation.
Distribution Transformers: Employed in local electrical grids to reduce voltage to a usable level, often oil-filled for durability and efficiency.
Instrument Transformers: Such as current transformers and voltage transformers, used for metering and protection purposes, and typically filled with oil to ensure accurate and reliable operation.
Autotransformers: Utilized where voltage regulation is needed, oil-filled to manage high power with efficiency.
Hermetically Sealed Transformers: Used in environments where the transformer oil must be completely isolated from the atmosphere, to prevent oxidation and contamination.

Transformer oil filling is done under vacuum conditions to remove air and moisture from the transformer tank and windings. The oil is carefully poured or pumped into the transformer while maintaining the vacuum to avoid the formation of air bubbles, which can compromise the insulating properties of the oil.