The main components of an oil-immersed transformer include:

• Core: Made of stacked silicon steel sheets, it forms the transformer's magnetic circuit.
• Windings: Includes the primary winding (high-voltage side) and the secondary winding (low-voltage side), immersed in insulating oil.
• Tank: A sealed, welded steel tank that holds the oil, core, and windings.
• Oil Consolidator: Located above the tank, it expands the oil in the tank to accommodate temperature changes.
• Radiator: Dissipates heat from the tank.
• Insulating Bushings: Used to insulate the high-voltage and low-voltage leads, facilitating connection to external circuits.
• Tap Switch: Used to adjust the transformer's output voltage, typically located inside the tank.
• Other Components: Such as breather, explosion-proof conduit, gas relay, thermometer, etc.