Preventing cable faults Preventing cable faults Taking measures to prevent cable faults Analysis of the causes of insulation, accessories and outer sheath faults shows that cable line engineering is a systematic project, and its entire process can only be managed from the aspects of design, construction, operation and maintenance, etc. to ensure its safe operation. (1) From the beginning of the design, fully understand the grounding system used by the cable, select the cable that meets its voltage level, and avoid the cable working under long-term overvoltage conditions. The selection of the outer sheath should meet the requirements of the use environment and service life. At the same time, the selection of the cable sheath protector should meet the principle that the protector can reliably pass the ground current without damage when it is grounded relative to the ground.
(2) The cable route selection should avoid the influence of the external environment such as overheating, corrosion, external force damage, etc. on the cable, and at the same time avoid the cable laying too concentrated, causing the heat not to spread in time, and causing the internal factors of overheating. In addition, it is not recommended to lay the cable paths of the double-circuit power supply in the pipelines of the same path to prevent simultaneous damage and cause a large-scale power outage accident. (3) Strengthen the selection of cables and cable accessories, the supervision of manufacturers, and the acceptance of goods on arrival to ensure the quality level of cables and cable accessories.
During the on-site inspection, the manufacturer, the construction party, the supervisory party and the project management department should be present to inspect the goods one by one according to the packing list, record the problems found in time and put forward rectification suggestions, which are signed and approved by multiple parties. For parts that are prone to moisture, after the inspection is completed, they should be sealed in time to prevent moisture from affecting normal use. (4) Strengthen personnel training, conduct necessary business qualifications and technical evaluations for cable head production personnel, and take up their posts with certificates.
If there are two consecutive failures due to production reasons during the warranty period, the qualification of cable head production will be cancelled, and the company can only resume work after passing the retraining assessment. (5) Strengthen the acceptance of concealed works and intermediate links in each link of the cable project, strictly control the quality acceptance, thoroughly rectify defects and hidden dangers found in the acceptance of civil engineering, electrical and other projects, and make various records, and keep photos when necessary , video and other information. (6) Use advanced online monitoring technologies such as outer sheath circulating current online monitoring technology, online optical fiber temperature measurement technology, and online partial discharge detection technology to strengthen the real-time online operation monitoring of cables, discover hidden defects in advance, and avoid power outages.
Prevent Cable Failure Take measures to prevent cable failure Shenzhen Noyafa Electronic Technology Co., Ltd.
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