Low voltage transformer 0.4kV is designed to step down medium or high distribution voltages into standardized low-voltage levels, typically 400V systems used in industrial, commercial, and residential applications. It ensures stable and safe electricity supply for lighting, machinery, appliances, and control systems. Built with efficient core materials and compact design, it minimizes energy loss while maintaining consistent output voltage. It is widely used in distribution panels, small substations, and building electrical systems.