The key components of the S11-2000KVA/10KV/0.4KV oil-immersed transformer consist of the transformer itself, oil tank, cooling system, protection equipment, and outgoing line equipment. The transformer itself includes the core, windings, insulation, conductors, and tap changers; the oil tank includes the tank itself and its accessories (drain valves, grounding screws, trolleys, nameplates, etc.); the cooling system includes radiators and cooling towers; the protection equipment includes oil reservoirs, oil level indicators, safety pipes, desiccators, temperature sensors, and gas relays; and the outgoing line equipment includes high and low voltage bushings.