Answer: HVAC (High Voltage Alternating Current) is the traditional method for transmitting electricity, and it is highly efficient for shorter distances. However, for long-distance bulk power transfer (typically over 500 km or for subsea cables), HVDC (High Voltage Direct Current) is often more economical and efficient. While HVAC systems are cheaper to build, HVDC has lower power losses over long distances and allows for the interconnection of unsynchronized AC grids. Our equipment is designed to support the construction and maintenance of both types of transmission lines.