If the transformer oil runs too often, or if it runs or absorbs moisture, it will deteriorate the oil quality. It is very easy to break through the discharge between the windings and the shell by using the oil which is not up to the standard value, causing serious accidents.
It is found that the leakage of transformer must be dealt with promptly, such as serious leakage of oil, so the transformer should be stopped and repaired in time. First of all, we should look for the oil leakage point. It is easy to find the oil leakage fault. Oil leakage is not easy to find. Oil seepage is usually done in the place where dust is gathered and wet.
If the transformer oil is exuded from the upper cover, a screw should be fastened at the upper end. If the transformer oil is exuded from the gear position, it should open the retaining cover and tighten the pressure screw in the inside. If the insulation pad is aging, the insulating oil pad should be replaced in time.
Transformer oil should be subjected to a voltage withstand test for 1~3 years. If transformer oil is not up to the technical requirements, it should be replaced or filtered as early as possible. Because the quality of transformer oil is very high, it is difficult to explain whether transformer oil is qualified without pressure test and simplified test. But after long-term practice, the qualification of transformer oil can be identified by one smell and two.
Try to control the upper layer of transformer oil temperature is not more than 85 degrees Celsius, that is, the difference between the requirement and room temperature is less than 55 degrees Celsius. If the transformer temperature rises suddenly when the transformer is running, it is the performance of the transformer's internal overheating. The external reason is that the transformer is seriously overloaded. The internal causes include iron core ignition, winding turn to turn short circuit, internal screw loosening, and cooling device failure.
The new transformer oil is usually yellowish, and the color will darken after oxidation. Two see the transparency of transformer oil. The new transformer oil is transparent in glass bottles and has a blue and purple fluorescence. If the fluorescence is lost or no more transparent, there are free carbon and mechanical impurities in the transformer oil.
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