What Is The Main Function Of The Oil Pillow Of An Oil-immersed Transformer?

What is the main function of the oil pillow of an oil-immersed transformer?
The main functions of the oil pillow of an oil-immersed transformer include the following aspects
‌Regulating the amount of oil‌: The oil pillow can ensure that the transformer oil tank is full of oil at any temperature and operating conditions. When the volume of the transformer oil expands or decreases with the temperature of the oil, the oil pillow plays the role of storing and replenishing oil, thereby ensuring that the transformer oil tank is always full of oil.

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Reduce the contact between oil and air‌: The oil pillow prevents the oil from being oxidized and dampened too quickly by reducing the contact surface between the transformer oil and the air. The oil in the oil pillow usually does not participate in the circulation in the oil tank, the temperature is low, and the oxidation process of the oil is also slow, which is conducive to slowing down the aging of the oil.

‌Protect the transformer‌: The oil pillow also has an explosion-proof function. When the transformer fails, if the oil temperature rises rapidly and the volume expands sharply, the space in the oil pillow can accommodate excess oil, prevent the oil from rushing out of the explosion-proof pipe, and protect the transformer from major damage.

‌Other functions‌: An oil level gauge is installed on the side of the oil pillow to monitor the changes in the oil level and ensure the safe operation of the transformer.