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Transformer oil leakage is a common fault of oil-immersed transformers in Southeast Asia, especially in coastal and humid areas. The main causes of oil leakage include poor sealing, tank corrosion, loose bolts, and aging gaskets. In the high temperature and humid environment of Southeast Asia, oil leakage will not only cause the loss of transformer oil, affect heat dissipation and insulation performance but also accelerate the corrosion of the transformer shell and internal components, leading to more serious faults.
Many users do not know how to deal with transformer oil leakage correctly, resulting in small leaks evolving into large leaks, increasing maintenance costs. In fact, different types of oil leakage have corresponding solutions, and timely treatment can effectively avoid further damage. The following sorts out common oil leakage types, their causes, and practical treatment methods, suitable for Southeast Asian users to operate.
| Oil Leakage Type | Common Causes | On-Site Performance | Treatment Methods |
|---|---|---|---|
| Shell Seam Leakage | Poor sealing during installation, aging of sealing gaskets, corrosion of seam edges | Oil seepage along the shell seam, slight oil stains on the surface | Disassemble the seam, clean the surface; replace the aging gasket with corrosion-resistant silicone gasket; apply sealant to the seam and tighten the bolts |
| Bushing Leakage | Aging of bushing insulation, loose connection, corrosion of the connection part | Oil leakage around the bushing, obvious oil drops; occasional unstable voltage | Remove the bushing, clean the connection part; replace the aging bushing and gasket; retighten the connection bolts and do sealing treatment |
| Bolt Connection Leakage | Loose bolts, insufficient torque, corrosion of bolt threads | Oil seepage around the bolt, slight oil stains; bolts are easy to loosen again | Clean the bolt and thread, remove corrosion; retighten the bolt with a torque wrench according to the standard; apply anti-corrosion grease to the bolt |
| Tank Corrosion Leakage | Salt spray corrosion (coastal areas), moisture corrosion (inland areas), tank scratch damage | Local rust on the tank, oil leakage from the rusted part; the leakage area gradually expands | Polish the rusted part, remove corrosion; apply anti-corrosion coating and paint; if the corrosion is serious, repair the tank or replace the local part |
It should be noted that before dealing with oil leakage, the transformer must be shut down and cooled to room temperature, and the leaked oil must be cleaned up to avoid fire and environmental pollution. For large-scale oil leakage or serious tank corrosion, it is recommended to invite professional technicians to carry out maintenance. In addition, regular inspection of the transformer’s sealing performance and anti-corrosion status can effectively prevent oil leakage faults.
For Southeast Asian users, mastering the correct oil leakage treatment methods can reduce maintenance costs, avoid further damage to the transformer, and ensure the stable operation of the equipment.