Power cables are an important part of the power grid and play an important role in the transmission and distribution of electric energy. Although the production cost of cables is high, they have been widely used in my country due to their high safety, low natural conditions, and low investment in daily maintenance. However, in work, cables sometimes encounter short-circuit faults, flashover faults, and ground faults. It is difficult to find the fault point and determine the cause of the fault. Therefore, in order to eliminate the fault in time, make the cable recover quickly, improve the working efficiency of the cable, and reduce the frequency of failure, a lot of manpower, material and financial resources must be invested to increase the maintenance and management of the cable.
1. Specific measures to strengthen ASTM 477 MCM ACSR Cablemaintenance
1.1 Establish a sound periodic inspection mechanism for cable lines
Check the cables regularly to prevent natural or man-made damage, and take timely measures to avoid hidden dangers. In the specific implementation, the inspection cycle must first be established, such as laying vertical cables at least once a year, laying outdoor cable terminals at least once a month, and no less than one night inspection a year in accordance with the provisions of the National Cable Maintenance and Protection Regulations.
1.2 Improve the inspection method of wire and cable system
Due to the complex and diverse terrain of our country, uneven population distribution, and different cable layouts in different regions, different inspection methods should be adopted for different laying methods. For example, under the more common direct burial mode in the plain area, under the premise of following a certain survey cycle, follow the regular inspection steps to perform careful inspections without leaving any hidden dangers to ensure the normal operation of the cables. For example, check the integrity of the land near the cable, whether there is excavation, whether there are garbage and flammable and explosive products stacked, including carefully checking whether the cable road signs are moved or damaged, whether the cable protection steel frame on the ground is corroded, and waterproof protection Whether the measures are good.
1.3 Do a good job of daily maintenance of wires and cables
On the basis of doing a good job in the detection of cable lines, timely and correct maintenance of wires and cables. In order to ensure the safety of the cable, when excavating near the cable, a professional cable staff must be present to guide the excavation work and tell the excavator to pay attention to specific details to ensure that the cable will not be damaged. "When inspecting cables regularly, pay attention to the inspection methods and the use of maintenance tools. For example, when cleaning the cable trough, if there is a gap in the water in the terminal box, the same insulation quality and specifications must be maintained. If the contact is not good, use it Use a shaking head to measure the insulation resistance of the cable. In order to ensure the professional operation of cable anti-corrosion measures, the local soil quality and natural environment should be fully considered when the cable is corroded. If the cable is corroded under objective natural conditions, it must be replaced. For cables with strong corrosive ability, place the cables in the protective tube and cover the neutral soil around the cable protective tube. In case of casualties, the protection of the cables in this area must be strengthened, and the corresponding cable protection nameplates must be installed around the cables. Establish a protection network.