As a part of power line, power cable is widely used because of its low failure probability, safety and reliability, and flexible outgoing line. Inner Mongolia Power Maintenance However, once a fault occurs, the maintenance is difficult and dangerous, so special attention should be paid to the maintenance and test. 1. Preparations before work: one kind of work ticket shall be filled in for power cable outage work, and the second kind of work ticket shall be filled in for work that does not need power outage. Before work, the relevant path diagram, arrangement diagram and drawings of concealed works shall be consulted in detail. The cable name and signboard must be checked in detail to see if they are consistent with the work ticket. The work can only be started after the safety measures are correct and reliable.

2. Precautions during work

The cable to be repaired must be confirmed during operation. The cables to be repaired can be divided into two types:

(1) Cables with terminal fault and obvious fault points on the surface of cable body. This kind of faulty cable has obvious fault signs and is easy to confirm.

(2) The cable surface does not expose the fault point. Inner Mongolia power maintenance price For this kind of faulty cable, in addition to checking the data and verifying the cable name, the cable identifier must also be used to distinguish it from other live cables in operation. Especially when there are many cables in the same section, it is particularly important to strictly distinguish the cable to be repaired from other live cables. At the same time, it can also effectively prevent misidentification of cables due to wrong hanging of cable labels, which will lead to accidents of misdisconnection of live cables.

3. Precautions during high voltage test

The high-voltage test of cables shall strictly comply with the Electric Power Safety Work Regulations. Even if the site working conditions are poor, the requirements for safety cannot be reduced in the slightest. The division of labor must be clear, and the safety precautions should be arranged in detail. The test site shall be equipped with a closed barrier or fence, hung with a sign board of "Stop, High Voltage Danger!", and assigned to guard. In particular, the other end of the cable must also be guarded, and communication must be kept smooth to prevent emergencies. The test device and wiring shall meet the safety requirements, and the operation must be standardized. Attention shall be focused during the test, and the operator shall stand on the insulating mat. When changing the wiring or the test is completed, the test power supply shall be disconnected first, the discharge shall be conducted, and the high-voltage part of the high-voltage equipment shall be short circuited and grounded. When conducting high-voltage DC test for power maintenance in Inner Mongolia, the cable shall be discharged to ground several times and short circuited to ground at the end of each paragraph or test, and then the cable can be contacted.