Once power cables are put into use, they will remain continuously charged for a long time, and the insulation material will gradually age over time. Standardized daily operation and maintenance can timely detect hidden dangers, reduce the possibility of power outages, and maintain continuous power supply to the line.

Daily inspections are divided into two parts: visual inspection and performance testing. The focus of the appearance inspection is to check whether the outer sheath of the cable is cracked or bulging, whether there is heating or glue leakage at the cable terminal and intermediate joint positions, and to pay attention to ground settlement and excavation construction in the buried section to prevent external forces from damaging the cable body. If the protective sheath is found to be damaged, timely protective measures should be taken to prevent water vapor from entering and damaging the internal insulation layer.

In addition to visual inspection, regular electrical testing is required, including insulation resistance testing, partial discharge testing, etc., to determine the integrity of the insulation layer. During operation, it is necessary to control the line load to avoid long-term cable overload. Overload can rapidly increase cable temperature, accelerate insulation aging, shorten cable service life, and in severe cases, cause insulation breakdown.

In addition, cable channel management cannot be ignored. Maintain ventilation and dryness in cable trenches and tunnels, reduce water accumulation, clean up debris, and prevent rodents from biting the protective sheath. Once a cable fault occurs, professional personnel need to locate the fault point, repair or replace the damaged section, and only after passing the test can power be restored. Continuously doing a good job in operation and maintenance management can fully utilize the transmission capacity of power cables and ensure the smooth operation of the power supply network.