摘要
低压配电电缆截面的计算与校验,在工程设计时通常是对过负荷保护与电缆载流量、用电设备端电压损失、低压断路器灵敏度、短路电流热稳定等进行分析。长距离低压配电电缆的线路阻抗大,末端短路电流小,易出现不满足低压断路器灵敏度校验。本文结合具体的工程案例,深入分析了低压配电电缆截面的计算与校验。通过选择低压电气设备的配置功能,避免了增大低压配电电缆截面,以节约工程建设投资。
The calculation and verification of low-voltage distribution cable section mainly analyze the overload protection and cable load flow,voltage loss of electrical equipment,low-voltage circuit breaker sensitivity,short-circuit current thermal stability,etc.The line impedance of long-distance low-voltage distribution cable is large and the terminal short circuit current is small,which is easy to meet the sensitivity check of low-voltage circuit breaker.Based on specific engineering cases,the calculation and calibration of low-voltage distribution cable section are analyzed.By selecting the configuration function of low-voltage electrical equipment,increasing the section of low-voltage distribution cable is avoided to save the investment in engineering construction.
出处
《电力系统装备》
2023年第3期52-55,共4页
Electric Power System Equipment
关键词
低压配电电缆截面
过负荷保护与电缆载流量
用电设备端电压损失
低压断路器灵敏度、短路电流热稳定
low-voltage distribution cable section
overload protection and cable load flow
voltage loss of electrical equipment
low-voltage circuit breaker sensitivity and thermal stability of short-circuit current
