Overhead Power Transmission Lines (OHTL) are structures used to transmit electrical energy over long distances by suspending bare conductors from towers or poles. They are preferred for bulk power transmission primarily due to their cost-effectiveness and ease of maintenance and repair. Air acts as the natural insulating medium, simplifying design and allowing for quicker fault detection and repair compared to underground systems. This makes them the most efficient and economical method for connecting power generation sources to distant consumption centers.