Answer: transmission lines can be classified based on their voltage, length, and physical location.

• Based on Voltage: transmission lines are categorized as High Voltage (HV), Extra High Voltage (EHV), and Ultra High Voltage (UHV), with each class having a specific voltage range.

• Based on Length: They are also classified as Short, Medium, and Long lines, with the analysis of each type considering different electrical parameters.

• Based on Physical Location:

  • Overhead Transmission Lines: These are the most common type, with conductors suspended in the air by towers.

  • underground Transmission Lines: Insulated cables that are buried in trenches or tunnels, typically used in densely populated urban areas or for short distances where overhead lines are not feasible.

  • Submarine Cables: A specialized type of underground cable laid on the seabed to connect power grids across bodies of water.

As a leading manufacturer, Ningbo Changshi provides all the necessary equipment for these different line types, from overhead transmission line equipment for traditional grid projects to underground cable laying equipment for modern infrastructure development.