Cable joints are weak points in power lines, where a large number of cable faults occur. Standardized construction and regular maintenance are key to ensuring stable power supply for the entire line.

Cable joints are divided into intermediate joints and terminal joints. The intermediate joint is used for connecting two sections of cables; The terminal connector is installed at the end of the line to connect the cable to the switchgear and transformer. When making the joint, it is necessary to peel off the sheath, shielding layer, and insulation layer according to the process. The main insulation should not be scratched during operation. The grounding treatment of the metal shielding layer should comply with the specifications, otherwise it is easy to cause electric field abnormalities.

The construction environment can also affect the quality of joints. A humid and dusty environment is not suitable for joint operations. Dust and water vapor remain on the insulation surface, and long-term operation can induce partial discharge. After the joint is made, it should be sealed and waterproofed to prevent water vapor from seeping in.

After being put into operation, the inspection focuses on the joint position, checking for leaks and deformations, and using temperature measuring equipment to monitor the joint temperature. Abnormal temperature rise often indicates high contact resistance and needs to be dealt with in a timely manner. Cable joints should not be subjected to external pulling for a long time, and debris should be avoided from squeezing the joint area inside the channel. Pay attention to joint technology and inspection, reduce line failures, and ensure the safety and reliability of the distribution system.