Our Pad mounted transformer is suitable for us in the city area and cultural assets, which is reduced by 15~30% in size compared to existing pad transformer. It is safe because there is no external exposure of cable and live part. It can protect transformer or line in case of internal accidents of transformer. Transformer with built-in fuse for circuit breaker Transformer suitable for refinement of urban environment it is installed in underground power distribution system which grounded processing line if protected. It has built-in protection device inside of transformer, It is a transformer that does not require a power transformer and has excellent safety and compatibility with the surrounding environment.