设备接地系统与人身安全体系的评估
目前对于接地系统的选用上还存在着一些商榷之处。依据电气设备及人身安事故的历史数据，结合分析并比较各种接地方式的优缺点及应用范围，为工农业安全生产、电气设备及人身安全提供理论支持。10094
关键词：接地系统；电气安全；IT系统；TT系统；TN系统
Equipment grounding system and personal safety evaluation system
Abstract：Grounding of electrical equipment in power system reliable and effective, related to the operation safety and personal safety. It is important to supply security，reliability, quality, long-term. This paper introduces several kinds of low-voltage power supply system grounding method. Grounding of low-voltage power supply system including IT system, TT system and TN system (including TN-C system, TN-S system, TN-C-S system) a total of 5. Selection of grounding system properly, it will affect the normal function of electrical equipment, and will lead to electrical accidents, resulting in undue economic loss and harm to personal safety.
The selection of grounding system still exist some questionable. Based on the historical data of electrical equipment and personal safety accidents, combined with the analysis of advantages and disadvantages and application scope of comparison of different grounding modes, providing theoretical support for industrial and agricultural production safety, electrical equipment and personal safety.
Key words：Earthing system；Electric safety；TN system ；TT system ；IT system
目 录
1 前 言 1
1.1 本课题研究的历史和现状 1
1.2本课题所完成的任务 3
2 电气安全 4
2.1 电气安全概念 4
2.2 电的特点 4
2.3电流对人体的伤害： 4
2.4人体触电方式 5
2.5安全电压 5
2.6电线的相色 6
2.7防爆区域划分 6
2.7.1防爆区域 6
2.7.2安全区域 7
3.1接地的种类和目的 8
3.1.1安全保护接地 8
3.1.2系统接地 8
3.1.3防雷接地 8
3.1.4重复接地 8
3.1.5防静电接地 8
3.1.6屏蔽接地 8
3.2接地的作用 9
3.2.1防止电击 9
3.2.2保证电力系统的正常运行 9
3.2.3防止雷击和静电的危害 9
3.3.1电气设备的接地体 9
3.3.1电气设备的接地体的安装与注意事项 9
3.3.2电气设备的接地体安装 10
3.4电气设备接地方法 10
3.4.1安全保护接地 10
3.4.2系统接地 11
4几种接地方式的优缺点及应用范围 13
4.1 TN方式供电系统 13
4.1.1 TN-C方式供电系统 13
4.1.2 TN-S方式供电系统 15
4.1.3 TN-C-S方式供电系统 15
4.2 TT方式供电系统 17
4.3 IT方式供电系统 18
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