How to Deal with Transformer Moisture Ingress?

Moisture ingress in transformers is a common issue that, if not promptly addressed, can lead to a decline in insulation performance, abnormal electrical behavior, and even serious consequences such as short circuits. When dealing with a moisture-affected transformer, a series of professional measures must be taken to restore its normal operation.

Power Shutdown: The first step is to cut off the power to ensure operational safety.

Ventilation and Dehumidification: Subsequently, reduce the internal humidity of the transformer through ventilation and dehumidification. This can be achieved through natural ventilation or by using dehumidification equipment. During the power-off state, fans or air conditioning devices can be utilized for ventilation and dehumidification. It's essential to avoid excessively prolonged dehumidification to prevent any adverse impact on the transformer's insulation performance.

Replacement of Severely Moisture-Affected Insulation Materials: Insulation materials severely affected by moisture should be replaced. When replacing insulation materials, choose the same model and specifications as the original materials and strictly follow the specified installation procedures.

Drying Process: Drying is a crucial step, and professional drying equipment can effectively eliminate moisture inside the transformer, preventing permanent damage to insulation materials. Drying can also be done using sunlight or drying machines. It is important to avoid excessively long drying times to prevent any impact on the transformer's performance.

Regular Maintenance for Long-Term Use: Transformers in long-term use should undergo regular maintenance, including inspection and replacement of damaged components, as well as comprehensive cleaning and lubrication. This ensures the transformer operates safely and reliably.

LuShan, est. 1975, is a Chinese professional manufacturer specializing in power transformers and reactors for 49 years. Leading products are single-phase transformer, three-phase transformers, DC inductors, AC reactors, filtering reactor, expoxy resin high-voltage transformer and intermediate, high-frequency products. Our transformers and reactors are widely used in 10 application areas: rapid transit, construction machinery, renewable energy, intelligent manufacturing, medical equipment, coal mine explosion prevention , excitation system, vacuum sintering, central air conditioning.

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