Standard for protective spacing between medium, short wave broadcast transmitting station and electric cable carrier telecommunication systems 中、短波广播发射台与电缆载波通信系统的防护间距标准
Automatic Protective Switching System for Optical Cable Communications 光缆通信自动保护倒换系统
Study on the current fault protective system in underground LV cable networks 煤矿井下低压电网电流故障保护系统的研究
In order to ensure the expressway normal operation, some protective measures such as slope surface waterproof, prestressing anchored cable and mortar anchored pile framework are taken prevent the slope from deeply destroying. 为了保证高速公路运营安全,宜采取主动防护措施,如坡面封闭隔水处理、预应力锚索、砂浆锚杆框架等防护方案,以防止发生边坡深层破坏。
This paper is based on the importance of installing overcurrent protective system in underground LV cable distribution network, narrates the fundamental principle of overcurrent protection in underground explosion_proof vacuum switchgear. 从煤矿井下低压电网中装设过电流保护的重要性入手,描述了矿用隔爆型真空馈电开关中过电流保护的工作原理。
The SD-environmental protection type plastic protective sheath which was developed to meet the market demand of power cable underground project in Shanghai is recommended. The market background of the product and its environmental protection performance are introduced in detail. 介绍了配合上海城市电力电缆入地改造工程这一市场需求而研制开发的SD-环保型电力电缆塑料保护管项目,对该产品当前的市场背景和环保性能等方面作了详细的介绍。
The paper puts forward concrete methods and technical standards suitable for protective measures of site constructions of communication optical cable line overhead project as good reference to the similar project constructions. 本文针对通信光缆线路架空工程施工中应采取的防护措施,提出了适合现场施工的具体方法和工艺标准,对同类工程施工具有较好的参考意义。
This paper narrates the fundamental principle of overcurrent protective system in underground LV cable networks. 本文描述煤矿井下低压电网中电流故障保护系统的工作原理。
Discussion on Protective Measures for Overhead Optical Cable Lines 谈架空光缆线路防护的措施
In the paper, the different theoretical bases for the two kinds of safety protective mode i. e. jumper cable and insulated flange and the developing trend were expounded, the opinions for improving the internal petroleum terminal were raised. 阐述跨接电缆和绝缘法兰两种安全防护方式的不同理论基础和发展趋势,并介绍了绝缘法兰和绝缘软管在钢质码头以及混凝土和木质码头上的使用方法。
It is difficult to match overload protective characteristic of protective apparatus with that of cable. 保护电器过载保护特性实际上很难与电缆过载特性合理配合。
Discussion on the protective methods for mine hoisting steel cable and ways of defects detection 矿井提升钢丝绳防护措施和探伤方法的探讨