Transformers modify voltage levels for efficient power distribution across electrical systems. They convert high voltage to a lower, safer level for commercial and residential use or step up voltage for efficient long-distance transmission. Accessories include cooling fans, bushings, and tap changers, enhancing efficiency and protection. Transformers play a critical role in electrical grids, reducing power loss during transmission and ensuring suitable voltage for end-users. Their reliable operation is essential for stable electricity distribution, powering homes, businesses, and industries safely and efficiently.