Power cables are widely used because of their low failure rate, high safety and reliability. However, once a failure occurs, maintenance will be more difficult and dangerous, so attention needs to be paid to maintenance and testing. The following Tianxing cable Xiaobian to analyze the maintenance of power cables need to pay attention to several problems.

Tianxing cable analysis maintenance power cable need to pay attention to several problems

1. Preparation before work

The first type is used for power line outage work, and the second type is used for work that does not require power outage. Before working, check the relevant roadmap, layout drawings and hidden engineering drawings. You need to check whether the name of the cable and nameplate is consistent with the working order, and only after taking correct and reliable measures can you start working.

2. Precautions in work

The cable to be repaired must be confirmed when working, and there are two types of cables to be repaired:

(1) The cable head surface is faulty and there is a prominent fault point of the cable. This faulty cable has prominent signs of failure and is easy to confirm.

(2) Cables without fault points on the cable surface, for such faulty cables, in addition to checking the data and verifying the cable name, it is necessary to mark the cable identifier; To distinguish it from other live cables in operation, especially if there are many cables in the same part; It is especially important to distinguish cables that require major repairs from other live cables, and at the same time, it also prevents cable misidentification due to incorrect cable labels, which can lead to accidental disconnection of live cables.

When sawing cables, reliable protective measures should be taken; Before sawing the cable, it is necessary to confirm whether the cable needs to be cut off and that the cable has no electricity; Then, before working, the subway with a wooden handle (epoxy handle) is inserted into the cable core; The person holding the wooden handle should wear insulation gloves and stand on the insulation pad, and pay attention to ensure that the iron brazing is well grounded; If the cable needs to be moved during work, care should be taken and excessive operation should be avoided so as not to damage other cables in operation; The cable head needs to be installed according to the process requirements to ensure quality and no hidden dangers of accidents; After repairing the cable, carefully check both ends of the cable, first remove the original color mark, and then paste the correct color mark to prevent the old and new colors from mixing.

3, high voltage test precautions

Cable high voltage testing should strictly comply with the "Electrical industry safety work Regulations", even in poor field working conditions should not reduce the requirements; Clear division of labor, and should be detailed arrangements for preventive measures, should be installed at the test site closed fences or fences; And marked "Stop, high pressure danger!" Typeface mark; It should be hung outward and protection should be sent, especially in cases where the other end of the cable needs protection and communication must remain open to prevent emergencies.

Test equipment and wiring should meet the requirements, operation should be standardized; During the test, attention should be paid to the operator standing on the insulation pad; When the line is changed or the test is finished, the test power supply should be disconnected, discharged, and the high voltage part of the high voltage equipment should be grounded; In high-voltage tests, the cable should be discharged to the ground several times before touching it, and it should be short-circuited from the ground at the end of each test or at the end of the test.

Qingdao Tianxing Cable Co., Ltd. is a technology enterprise specializing in the production of power cables in Shandong Province, with more than 150 sets of domestic excellent cable production equipment and testing equipment, excellent production technology, modern testing equipment, to ensure product quality and stability, timely delivery. The main products of the company are power cables, mineral cables, high life power cables, radiation cross-linked cables, control cables, computer cables, photovoltaic cables, communication cables, data cables, low smoke halogen free cables, flame retardant series of power cables.