1. The oil level can be changed by the temperature change of special transformer. With the change of oil temperature, the oil level also changes in a certain range. However, under abnormal conditions, faults such as oil seepage, water seepage and other accidents will also cause abnormal changes in oil level.
2. Secondly, the change of oil temperature is related to load condition, ambient temperature and other conditions. When the oil level change is inconsistent with these factors, it may be a false oil level. Causes of false oil level: a. the oil standard pipe is blocked; b. The exhaust hole of explosion-proof pipe is blocked.
3. In addition, excessive oil level will cause oil overflow.
Treatment methods and emergency measures for special transformers:
1. If there is gas relay protection, release the tripping circuit to prevent false tripping.
2. The operator of electrical equipment on duty shall often check the indication of oil level gauge and drain oil appropriately when the oil level is found to be too high;
3. When abnormal oil injection is found in the conservator or explosion-proof pipe, the power supply of the transformer shall be cut off immediately to prevent the expansion of faults and accidents.
If the oil level of special transformer is too high, we should find ways to reduce it. If the oil level of transformer is too high, it is easy to cause overheating of transformer and then affect the work of transformer. If the circumstances are serious, it is likely to explode. We must treat this matter carefully