What factors are related to the poor quality of transformer

What factors are related to the deterioration of transformer oil quality

 

Answer: the primary factor affecting transformer oil quality deterioration is high temperature, oxygen and moisture in the air. ① When the oil temperature is above 70 ℃, the oxidation rate of oil increases by 1.5-2 times for every 10 ℃ increase;

 

② If the transformer is exposed to acid and air for a long time, the insulation will deteriorate;
③ Moisture, moisture and electrical insulation of oil decreased significantly, and it was easy to breakdown.

 

How to judge oil quality simply by experience method?

 

Answer: experience method is intuitionistic, which can easily judge the quality of oil. The primary basis is: ① the color of oil, new oil and good oil are light yellow, and the defective oil is dark brown; ② the transparency of oil, high-quality oil is transparent, and the defective oil is dirty, containing mechanical impurities, free carbon, etc; ③ Oil odor difference: new oil, high-quality odorless or slightly kerosene smell, defective oil with burnt (overheated), sour, acetylene (arc action) and other odor.