The quality and quantity of transformer oil
Thread Content
I would like to ask everyone: what does \"quality\" of a transformer refer to, and what does \"quantity\" refer to?
The quality of transformer oil refers to whether its voltage withstand rating meets the requirements, as well as various oil parameters such as viscosity, moisture content, and flash point； The amount refers to the fact that its oil level must meet the operating requirements of the transformer.
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In fact, the quality of transformer oil is not entirely determined by its breakdown voltage; it is quite easy to meet the breakdown voltage requirements for transformer oil； Another very important parameter for transformer oil is its antioxidant properties; only transformer oil with good antioxidant properties can be considered truly high-quality. Manufacturers of transformer oil are paying increasing attention to this parameter, including in the formulation of relevant standards.
I assume you want to determine the quality of transformer oil. By \"quality\" is meant the types of gas components present in the transformer oil, while \"quantity\" refers to the concentration of these gas components. The main gases generated due to thermal faults in transformers are ethylene C2H4, ethane C2H6, and methane C2H4 among the hydrocarbon gases; arc and spark discharges primarily produce acetylene C2H2. Moisture inside the transformer leads to the formation of hydrogen H2. Thermal faults and electrical faults involving solid insulation both result in the production of CO and CO2. The presence of discharge faults or faults combined with overheating can be determined using the C2H2/C2H4 ratio – typically, a ratio greater than 3 indicates insulation aging. Normal values for the CO2/CO ratio range from 3 to 7. The concentrations of all these gases can be determined through chromatographic analysis of the insulating oil.