Power Line Carrier Communication (PLCC) is a cost-effective and reliable technology that uses existing electrical power lines as a medium for transmitting high-frequency data signals. It works by superimposing a high-frequency carrier signal onto the low-frequency power signal (typically 50/60 Hz). This allows data, control information, and voice signals to be transmitted between substations and power equipment without the need for a separate communication network. Key components include line traps, coupling capacitors, and PLCC terminals (transmitters and receivers) that inject and extract the communication signal. Our company, Ningbo Changshi, provides a wide range of OHTL equipment and tools that are essential for setting up and maintaining PLCC systems, ensuring seamless integration into the power grid.