Proper moisture control and humidity are crucial for preventing malfunctions or failures in transformers and equipment. Maintaining a low moisture level within the conservator tank’s top can be achieved using air dryers filled with desiccants such as silica gel.

These humidity control breathers efficiently absorb moisture from incoming air, ensuring only dry air enters the equipment. When the transformer’s capacity increases, the insulating oil heats up, pushing out the dry air through the breather, and when it cools down, air from the atmosphere is drawn in, repeating the cycle. Keeping the oil content below 35 ppm moisture level is required to safeguard transformers and equipment from damage caused by moisture and humidity.