Por que há vazamentos de óleo no transformador

Transformer oil leakage is a common problem in oil immersed transformers. Mesmo um pequeno vazamento pode afetar o desempenho do isolamento e a confiabilidade do transformador.

Principais causas de vazamento de óleo do transformador

1. Aging Sealing Gaskets

Transformer tanks and accessories use rubber gaskets to prevent oil leakage.

After long-term operation, gaskets may become hard, rachado, or lose elasticity due to:

• alta temperatura
• oil aging
• condições ambientais

Common sealing materials include NBR, FKM, and silicone rubber.

2. Loose Connections

Transformer accessories are connected by bolts and flanges.

Long-term vibration and thermal expansion may reduce sealing pressure, causing oil leakage around:

• Revezamento Buchholz
• indicador de nível de óleo
• buchas
• válvulas

3. Damaged Accessories

Oil leakage may also come from transformer accessories.

Por exemplo, damaged seals inside an oil level indicator or Buchholz relay can cause oil loss.

Regular inspection helps identify leakage problems early.

How to Reduce Transformer Oil Leakage?

Reliable sealing materials and high-quality transformer accessories are important for preventing oil leakage.

Durante a manutenção, engineers should check:

• gasket condition
• oil level changes
• accessory connections
• leakage marks

Proper maintenance can extend transformer service life and improve operating safety.