Why do oil immersed transformers leak oil? (Common faults of oil immersed transformer)
Writer： Hengfeng you electric Time：2023-04-06 views：times
Oil immersed transformers occupy a large market share in China, but the problem of transformer oil leakage is a major problem and hidden danger in the power industry, especially the oil leakage of transformer high-voltage bushing is a common problem in China. For power industry, oil leakage is a more dangerous thing for transformer equipment. Hengfengyou Electric summarizes the reasons for oil leakage of oil immersed transformers and how to deal with it.
Let's take a look at the consequences of oil leakage of high voltage bushing of oil immersed transformer:
After the oil seeps out of the oil immersed transformer, it will cause serious dirt around the seeping point. If the point is close to the live part, especially when the casing at the inlet and outlet of the oil immersed transformer leaks oil, the casing will be damaged. Accumulation of a layer of dirt is likely to cause "pollution flashover" accident when meeting humidity, that is, discharge along the outer surface of oil immersed transformer bushing. It is complicated to replace the bushing of oil immersed transformer. Even if there are bushing spare parts, professionals need to affect the power supply for a day.
Oil leakage of oil immersed transformer happens frequently. Serious oil leakage will not only reduce the service life of the transformer, but also affect the safe and stable operation of the system. It has also long plagued the availability of electrical equipment. In recent years, through the maintenance of transformers, we have summarized the main causes of transformer oil leakage: aging and cracking of transformer rubber pads. Transformer manufacturing process quality problems. Accident elimination: improper installation and transportation mode.
For the oil leakage of the transformer high-voltage bushing, the general enterprise will replace the high-quality rubber gasket to keep the seal, and tighten the fastening bolts to make the bushing free of oil leakage. Or use copper aluminum transition to silver copper contact to reduce oxidation. However, these methods can not guarantee the effect, and the current Soleil carbon nano polymer material can effectively solve the problem of oil leakage. This material technology can realize quick treatment without stopping the machine, and make full use of the comprehensive properties of the material, such as oil resistance, high adhesion, corrosion resistance, etc. It can not only realize the rapid sealing of oil leakage, but also achieve the purpose of oil leakage prevention.
Why does the oil immersed transformer leak oil during operation? What is the cause? Is there a problem with the welding quality or is the transformer not sealed well?
First point: welding quality
The casing of oil immersed transformer is a combination of steel plate welding and connection. Longer welds and more welded joints have higher requirements for welding operations.
Due to the influence of external environment, temperature, experience and skills, welding materials, plates and other factors, sometimes the quality effect after welding is not ideal, and welding cracks and bubbles often occur, leading to oil leakage of oil immersed transformers. One of the main reasons.
Second point: sealing quality
The selection of sealing type and material is the main reason for poor sealing. When the sealing quality of the transformer is not good enough, oil leakage may occur during use.
Third point: aging of seals
Due to the weather environment, service environment and oil corrosion, the seal aging of oil immersed transformer is also one of the main reasons for oil leakage of oil immersed transformer.
In addition, there are other reasons, including insufficient daily maintenance in use and failure to timely handle some minor faults, which will also lead to oil leakage of oil immersed transformers.
Oil leakage treatment process of high voltage bushing of Hengfengyou electric immersed transformer:
1. Clean up the oil stains on the leaking parts, and polish around the leaking parts to expose the primary metal color;
2. Clean up. After surface treatment, it is required to be clean, dry, firm and rough;
3. Blending carbon nano polymer materials, plugging part until no leakage;
4. Block other parts. After the material is cured, the repair is completed.
Hengfengyou Electric focuses on the manufacturing and export of various distribution transformers, rectifier transformers, furnace transformers and mining transformers, and has been exported to more than 30 countries and regions around the world, including Uzbekistan, Kazakhstan, Pakistan, Kuwait, Iraq, the United Arab Emirates, Zimbabwe, Tanzania, South Africa, the United States and Spain. With 30 years of power transformer manufacturing and sales experience, Hengfengyou Electric will provide you with the best electrical product solutions, www.hengfengyou com ； info@hengfengyou.com ； WhatsApp：+86158 5325 2696（Jack）+86158 5326 5269（Alisa）
