The core requirements for transformer storage involve protection against moisture, dust, and mechanical damage, as well as the prevention of insulation degradation; environmental factors can significantly impact equipment performance during prolonged periods of inactivity. New, unused transformers should be stored in a dry, well-ventilated indoor environment, shielded from rain, humidity, and corrosive gases. It is particularly crucial to keep windings and insulation materials dry, as moisture ingress can compromise insulation strength. For oil-immersed transformers, the condition of the transformer oil requires special attention. The oil tank must remain tightly sealed during storage to prevent the entry of air and moisture, and oil levels should be checked regularly. If storage is prolonged, oil samples should be tested to ensure that oil quality has not deteriorated, which could otherwise affect future operational performance.
Mechanical protection and regular maintenance are also essential during storage. Transformers should be placed on a level, solid foundation to prevent tilting or vibration, and vulnerable components-such as external bushings and radiators-require adequate protection. For equipment stored for extended periods, periodic energization for drying or insulation testing is recommended to prevent internal moisture accumulation or insulation degradation, ensuring the unit remains in optimal condition for future operation.
