| 煤矿工业场地道路照明接地系统问题探讨 |
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| 引用本文： | 许涛.煤矿工业场地道路照明接地系统问题探讨[J].煤炭工程,2020,52(4):17-20. |
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| 作者姓名： | 许涛 |
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| 作者单位： | 中煤科工集团北京华宇工程有限公司自动化所 |
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| 摘 要： | 文章简要介绍了煤矿工业场地的特点和低压配电系统接地方式分类,从安全性、经济性的角度分析了TN接地系统和TT接地系统在道路照明回路中的优缺点。通过对比TN-S系统与TT系统的接地故障电流差异、TN-S接地系统用于道路照明的等电位联结困难程度,总结出煤矿工业场地的道路照明配电系统适宜采用TT接地方式。并且详细阐述了TT接地系统剩余电流动作保护器保护整定方法和灵敏度校验方法,列举了煤矿工业场地道路照明选用TT系统时需要注意的中性线不可重复接地的问题。
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| 关 键 词： | 煤矿 TT接地系统 道路照明 剩余电流动作保护器 |
| 收稿时间： | 2019-05-07 |
| 修稿时间： | 2019-08-24 |
Selection for Grounding System of Road Lighting in Coal Mine Industrial Yard |
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| XU Tao.Selection for Grounding System of Road Lighting in Coal Mine Industrial Yard[J].Coal Engineering,2020,52(4):17-20. |
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| Authors: | XU Tao |
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| Affiliation: | (Beijing Huayu Engineering Co.,Ltd.,China Coal Engineering and Technology Group,Beijing 100120,China) |
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| Abstract: | The paper expatiates concisely the characteristics of coal mine industrial yard and the classification of grounding systems of low-voltage distributing system, and as well as the Applicable situations of each type of grounding system. Then the advantages and disadvantages of TN and TT grounding systems for road lighting are analyzed. Furthermore, the setting principle & method of the operating current of the RCD(Residual Current Operated Protective Device) in TT grounding system is expounded and the suggestion about how to select the reasonable grounding system for the road lighting is displayed. |
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| Keywords: | coal mine TT grounding system road lighting RCD |
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