Common fault handling methods for power cables

In response to common faults in 10kV power cables, power companies should take timely and effective measures to encourage the safe and sustainable operation of electricity.

1. Seriously manage the operating environment and self quality of power cables

When laying cable pipelines, power supply companies (or external construction companies commissioned) should first inspect the surrounding environment. If there are corrosive factors or other factors that can easily cause malfunctions in the environment, they should be avoided as much as possible. In addition, a detailed investigation of geological pollution in the environment is necessary, and corresponding pollution prevention measures should be taken in different geological environments. For example, it is necessary to carefully choose the construction of channels in chemical plants and groundwater pollution areas.

The type of cable should also be selected based on the operating environment of the power grid, and the quality of the cable should be taken seriously to prevent it from being damaged or corroded by the environment. The cross-sectional area of the main core of the cable should be able to bear the operating load of the line and should not allow the cable to operate under overload or overvoltage. Power supply companies should vigorously promote knowledge of power grid protection, set up cable signs around the operation of power cables to prevent them from being artificially damaged, such as setting up warning signs in prominent locations to warn against touching, climbing, and increasing pressure; Do not damage cables; Strictly crack down on the theft, sale, and destruction of cable facilities, and create a good environment for the safe operation of cables.

2. Pay attention to the construction and operation management of power cables

Power supply companies should clarify their responsibilities for power construction and operation through clear measures for cable construction and operation management. According to relevant national laws and regulations on the protection of power facilities such as the Electricity Law, promote the normal progress of cable construction, operation, and management. Provide technical training to construction personnel to ensure the quality of construction and operation of power cables. The safe operation of cable lines is closely related to the quality and normal operation of power engineering. Therefore, strictly training the technical abilities of cable construction and operation personnel, and strengthening assessments, is not only responsible for the power enterprise itself, but also for the normal construction and operation of power cables.

The cable laying and installation in cable construction require the design of a reasonable route, and corresponding laying methods should be adopted according to the terrain environment. For example, if the distance between electricity users is relatively far, overhead or waterproof cables can be used. In areas where users are relatively concentrated, cable tunnels and cable wells can be used to protect cables and reduce cable damage. For newly operated power projects, strict construction and acceptance should be carried out in accordance with national technical requirements.

Electric power companies should choose the model and quantity of cables according to the situation when purchasing them, and must comply with the standards of the power supply line, and cannot operate at overload. To minimize human error and mechanical wear during construction, the installation path of cables should also be arranged and considered reasonably. Try to use brackets, pipelines, and cable trenches to lay cables, and scientifically design auxiliary facilities such as cable trenches and cable racks. It is particularly important to pay attention to the quality of the production of cable intermediate and terminal heads, and to use new types of silicone rubber prefabricated joints. Cable engineering should be constructed and accepted according to national technical requirements.

3. Strengthen the supervision and daily maintenance of power cables

The power supply company shall establish relevant regulatory inspection systems in accordance with the regulations of national ministries and commissions, closely monitor the load current of the lines, and prevent overloading from breaking through the junctions. Long term overloading operation of cables may cause cable faults. Establish a dedicated maintenance department and establish a regular inspection system for distribution equipment, allowing employees who have received professional skills training and have certain operational management experience to regularly inspect power cables and other equipment. If any faults are found in the lines, they should be reported in a timely manner and a maintenance plan should be proposed. Pay attention to the special inspection of cable lines with safety hazards, and make inspection records according to the regulations of the power supply company, truthfully filling in the operation status of the lines. When inspecting the line, it is important to pay attention to the operation of the cable line, such as whether there is any construction around the line and whether the normal operation of the line has been damaged