What are the causes of transformer oil leakage?
Release time ：
2024-03-02
Special transformer transformer has many welding spots and long welding seams
1. Failure of rubber seal and crack of weld
Special transformers have many welding spots and long welds, while oil-immersed special transformers are a collection of various welding and connection based on steel plate welded shells.
A QB-5000/2 oil-immersed traction transformer has more than 70 welding spots and a total weld length of about 20m, so there may be many leakage channels. The causes of direct leakage are rubber seal failure and weld cracking, porosity, slag inclusion, etc.
2. Aging, cracking and deformation of sealant parts
Special transformer leakage occurs in the joint, and more than 95% is mainly caused by the sealant.
The quality of the sealant mainly depends on its oil resistance. If the oil resistance is poor, the aging speed will be faster, especially at high temperatures, the aging speed will be faster, which can easily cause aging and cracking of the seals., Deterioration, deformation, and even failure, causing transformer oil leakage.
3. Manufacturing quality of special transformers
In the manufacturing process of special transformers, many welding spots, long welding seams, difficult welding, welding materials, welding (classification characteristics of welding process equipment) specifications, processes and technologies will affect the welding quality, resulting in air holes, sand holes, virtual welding and desoldering, thus causing oil leakage from special transformers.
4. Poor quality of plate butterfly valve
Another part of the special transformer that often leaks is the plate-type butterfly valve. For the transformer produced earlier, the connection surface of the ordinary plate-type butterfly valve used is rough, thin and single-layer sealed. It is an obsolete product and can easily cause transformer oil leakage.
5. Improper installation method
The flange connection is uneven, and the surrounding of the gasket cannot be evenly stressed during installation; the bolts around the gasket are artificially caused to be unevenly stressed; the flange joint is deformed and dislocated, so that the force on one side of the gasket is too large and the force on one side is too small. The gasket on the side with the smaller force is prone to leakage due to insufficient compression.
Keywords：
Electricity,Transformer
Previous Page
Contact Us
Email:
john.qtpower@gmail.com
Telephone:
+86 150 2901 9551
+86 158 2953 6922
+86 178 6879 9029
