Oil-immersed transformers are cost-effective, high-stability, and durable power distribution units widely adopted in global power grid and energy projects. Adopting premium insulating oil as the cooling and dielectric medium, they feature outstanding heat dissipation performance, strong overload capacity, low operational loss, and ultra-long service life with simple daily maintenance. With mature electromagnetic structure design and rigorous manufacturing techniques, these transformers deliver continuous, stable, and safe voltage conversion and power transmission for various power systems.