As a part of the power line, power cables have been widely used because of their low probability of failure, safe and reliable, and flexible qualifying. However, once a failure is caused, the maintenance is difficult and the danger is high, so pay special attention to the maintenance and test.

1. Preparation before work

A working ticket should be filled in the power outage work of the power cable, and the second type of work ticket should be filled in the work without power outages. Before work, please refer to the relevant path maps, arrangement diagrams and the drawings of the hidden projects. The name of the cable must be checked in detail. Whether the sign is consistent with the work ticket, and the work can be started after the safety measures are correct and reliable.

2. Precautions at work

The cables that need to be maintained during work must be confirmed.

The cables that need to be maintained can be divided into 2 types:

(1) Terminal fault and cables with obvious fault points on the surface of the cable body. Such fault cable signs of faults is obvious and easy to confirm.

(2) The cable surface is not exposed on the surface of the cable. For such faulty cables, in addition to checking the data and verifying the name of the cable, the cable recognition instrument must be identified to distinguish the total with other operating cables, especially when there are many cables in the same section, strictly strictly. It is particularly important to distinguish the cables that need to be maintained and other charged cables. At the same time, this can also effectively prevent the cable by mistake due to the cable signs wrong, resulting in a mistake in the occurrence of a cable accident. The sawing cable must have reliable safety protection measures. Before the saw the cable, it must be confirmed that the cable that needs to be cut off and the cable is not electric. Then, the ground with the ground with the ground with the ground with the ground with the epoxy resin stalk is nailed into the cable core before working. People with Fuku handle should wear insulating gloves and stand on the insulation pad. Pay special attention to ensure that the iron pupae is well grounded. If you need to move the cable in your work, you should be careful and do not do it to prevent damage to other operation cables. The cable head must be installed according to the process requirements to ensure the quality and no hidden dangers of accidents. After the cable is repaired, the phase of the cable should be carefully checked, first remove the original color logo, and then put on the correct color logo to prevent confusion of old and old.

3 Precautions for high -pressure tests

The high -voltage test of the cable shall strictly abide by the "Rules of Electricity Safety". Even in the case of poor working conditions at the scene, the requirements for safety cannot be reduced. The division of labor must be clear that the safety precautions should be arranged in detail. The test site should be installed with a closed cover or fence, hanging outward, "stop, high pressure danger!" In particular, the other end of the cable must also be sent to guard and keep the communication unobstructed to prevent emergencies. The test device and wiring should meet the safety requirements, and the operation must be standardized. Attention should be concentrated during the test, and the operator should stand on the insulation pad. At the end of the change of the line or the test, the test power supply should be disconnected first, discharge, and the short -circuit part of the high voltage part of the high -voltage equipment should be grounded. During the high voltage DC test, each time it comes to an end or the end of the test, the cable should be discharged several times and the ground is grounded several times. After that, the cable can be exposed to the cable.

4 Other precautions

When opening the cable well or cable groove cover, measures to prevent traffic accidents should be taken. The fence should be arranged around the well to make obvious warning signs and set up obstacles to block vehicles by mistake. In the evening, the cable well should have lighting to prevent pedestrians or vehicles from falling into the well. Before entering the cable well, the turbid air should be excluded. The staff in the well should wear a helmet and take measures such as fire prevention, waterproof, and high -air proof.