A 400kV overhead line is a critical part of the extra-high voltage (EHV) transmission network. Its main purpose is the bulk transfer of electricity over long distances with minimal energy loss. These lines act as the "superhighways" of the electrical grid, moving power from large-scale generation facilities, such as power plants or major renewable energy farms, to regional substations. From these substations, the voltage is stepped down for distribution to cities and towns. The high voltage minimizes resistance losses, making it the most efficient method for long-distance power transport.