Location: Home >>News >>Company News

      Ground loop current monitoring system to ensure smooth cable operations

      Author: Click:152 Time:2024-11-08

      Cable Sheath circulationis the induced current in the metal sheath of a high-voltage single-core cable (usually aluminum or copper sheath) due to the

      Cable Sheath circulationis the induced current in the metal sheath of a high-voltage single-core cable (usually aluminum or copper sheath) due to the cable's metal sheath being grounded at both ends or at multiple points during the cable's operation. When there is an AC current passing through the cable core, a magnetic field is generated around it. According to Ampere's loop law, the strength of the magnetic field is proportional to the size of the current. For single-core cables, whose metal sheath surrounds the core, this alternating magnetic field generates an induced electromotive force in the sheath. If the sheath is grounded at both ends or at multiple points, a closed loop is formed, and the induced electromotive force drives the electrons to flow, thus generating a loop current. For example, in high-voltage transmission lines, the cable transmits a larger current, generating a stronger magnetic field, more likely to produce significant sheath circulation.



      The grounding method of the cable metal sheath is also a key factor in generating sheath circulation. If the two ends of the grounding method, in normal operation, due to electromagnetic induction of the induced electric potential will be formed at both ends of the sheath potential difference, thus generating circulation. Even in the case of single-point grounding, if additional ground paths are formed in the sheath due to external factors (e.g., poor grounding, contact with other metal objects, etc.), loop currents may also be generated.

      In real operating environments, the presence of sheathing circulations means that electrical energy is lost. This loss of power not only reduces the efficiency of cable transmission of power, but also increases the operating costs. Moreover, cable sheath circulation will lead to sheath heating, and prolonged heating will accelerate the aging of the cable sheath insulation material, reduce its insulating performance, and may even lead to insulation damage, causing cable failure.

      Monitoring and preventive measures

      Monitoring methodology:

      You can use DX-DLS100-HL Ground Loop Current Monitoring System to monitor cable sheath loop current. Sleeve the ring current transformer on the cable sheath grounding wire, it can real-time measure the size and change of the ring current. At the same time, combined with the intelligent monitoring system, the monitoring data will be transmitted to the background for analysis and processing, and the abnormal ring current situation will be found in time.



      Preventive measures:

      In the cable design and installation stage, the grounding method can be optimized, such as the use of cross-interconnection grounding method, by changing the location and mode of grounding connection, effectively reducing the sheath ring current. At the same time, strengthening the selection and quality control of cables to ensure that the insulation of the cable sheath is good, is also an important measure to reduce the hazards of sheath ring current.



      Related recommendations

      The online monitoring, distributed fault location and cable online monitoring equipment for power transmission and distribution lines launched by SHENZHEN DINSEE SMART TECHNOLOGY CO.,LTD. has been widely used in Southern Power Grid and State Grid, and has achieved good results.

      Record No.: Yue ICP Bei 2022070794-1 | Website Map XML Map

      主站蜘蛛池模板: 国产探花在线精品一区二区| 91精品国产色综合久久| 无码国产精品一区二区免费3p| 日韩精品一区二区三区四区| 亚洲Av无码精品色午夜| 国内精品久久久久久不卡影院 | 大伊香蕉精品视频在线导航| 国语自产精品视频在线观看| 久久精品国产免费一区| 中文字幕久久精品| 国产在线国偷精品免费看| 国产大片91精品免费观看不卡| 久久亚洲精品无码AV红樱桃| 欧美日韩精品久久久久| 国产精品无码永久免费888| 久久国产乱子精品免费女| 国产精品无码A∨精品影院| 亚洲精品成人无码中文毛片不卡| 久久久久九九精品影院| 成人国产精品一区二区视频| 国产精品污视频| 久久精品国产精品亚洲毛片| 亚洲日韩精品A∨片无码| 久久久久久国产精品无码下载 | 久久99精品久久久久久| 亚洲AV无码久久精品蜜桃| 中文精品久久久久人妻不卡| 久久精品亚洲欧美日韩久久| 国产农村妇女毛片精品久久| 国产99久久九九精品无码| 97久人人做人人妻人人玩精品| 国产精品毛片久久久久久久| 97热久久免费频精品99| 精品国产乱码久久久久久1区2区| 无码国产精品一区二区免费式芒果| 中文字幕精品亚洲无线码一区| 永久无码精品三区在线4| 伊人 久久 精品| 日韩精品无码熟人妻视频| 久久久久无码精品国产| 久久99精品久久久久久久不卡|