摘要
对于低压成套开关设备,保护导体(PE)的选择直接关系到故障情况下电源是否能够自动断开,对于人身安全和设备安全都非常重要。合理选择保护导体截面积,在确保人身安全及设备安全的前提下,降低设备投资。介绍了低压成套开关设备保护导体的定义、作用及选择的主要因素、国家标准对保护导体的规定,分析了不同保护导体选择方法的区别,提出电气工程设计中保护导体选择的建议方法。
Due to low-voltage switchgear assemblies, the selection of protective conductor is directly related to whether the power supply can be automatically disconnected under fault conditions. It is very important for the person safety and equipment safety.On the premise of ensuring personal safety and equipment safety, the investment will be reduced by reasonable selection of protective conductor cross-sectional area. It introduces the definition, function and main factors affecting the choice of protective conductor of low-voltage switchgear assemblies. It describes national standard requirements for protective conductor. It analyzes different methods of protective conductor selection. Finally it presents the recommended methods on protective conductor selection in electric engineering design.
出处
《邮电设计技术》
2015年第3期88-92,共5页
Designing Techniques of Posts and Telecommunications
关键词
低压成套开关设备
保护导体
截面积
短路电流
热稳定校验
Low-voltage switchgear assemblies
Protective conductor
Cross-sectional area
Short-circuit current
Thermal stability check
