CAFS is developed based on the actual operating characteristics of 6kV~110kV power cables. It adopts a layered distributed structure and integrates various advanced digital technologies to adapt to harsh operating environments. It monitors the insulation status of power cables in operation and analyzes transient traveling waves of power cable grounding wires in real timeSignal characteristics, early detection of insulation faults in power cables and timely prediction, to avoid power outages caused by sudden cable failures and improve power supply reliability.