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110~220 kV单芯电缆护层接地施工技术分析
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作者 黄幸浩 《现代工程科技》 2025年第7期37-40,共4页
为解决110 kV单芯电缆护层接地保护问题,以某送电工程项目为例,采用交互式接地连接方案,配置3座电缆直接接地装置、1座防护接地设施及双座交互接地装置,安装9组一体化预制绝缘铜壳与玻纤防护盒电缆接头,敷设540 m回流导线,布置了845 m... 为解决110 kV单芯电缆护层接地保护问题,以某送电工程项目为例,采用交互式接地连接方案,配置3座电缆直接接地装置、1座防护接地设施及双座交互接地装置,安装9组一体化预制绝缘铜壳与玻纤防护盒电缆接头,敷设540 m回流导线,布置了845 m扁形接地导体与169根L型接地杆,采用单端接地、交叉互联等多种接地方式。金属护套在一端采用塔基直接接地时,另一端的正常感应电位值为104.5 V,低于300 V安全限值,运行期间未接地端感应电压控制在50 V以下,电缆绝缘层通过l128 kV/1h或64 kV/24h的耐压测试。通过合理的接地保护设计和施工,解决了单芯电缆护层过电压问题,保证了电缆系统的安全稳定运行。 展开更多
关键词 110-220kV single core cable Grounding of protective layer construction technique
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Theoretical Analysis of Measurement in Operation Efficiency in Optical Cable Transmission Networks
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作者 LIUGuo-liang ZHAOYing-cai 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2000年第1期60-66,共7页
It is necessary to study dynamic operation efficiency of transmission networks in order to realize high intensification of communication networks. The operation efficiency discussed here should exist not only in logic... It is necessary to study dynamic operation efficiency of transmission networks in order to realize high intensification of communication networks. The operation efficiency discussed here should exist not only in logic-circuit layer, but also in both path layer and medium layer. A theoretical method of the measurement of layers and comprehensive evaluations is presented based on the concept of transmission efficiency. 展开更多
关键词 transmission network logic circuit path system optical cable fiber core operation efficiency circuit merging
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