Abstract：In the 220/380V low-voltage system, there are a lot of low-voltage apparatus and equipment whose voltage bearing is low and energy resistance is small. When the lightning strikes the low-voltage distribution system, lightning current would intrude into the low-voltage equipment, generate overvoltage, and cause the equipment damage or burned. Surge protection devices (SPD) in power distribution system play an important role to achieve equipotential lap and limit overvoltage. This paper mainly analyzes the influence of the distance between the SPD and the different property loads in the type I protect case. It is concluded that the property of the loads and the distance between SPD and the loads can influence the protection distance, which can serve as a useful guidance function on over-voltage protection in low-voltage distribution system.
林燕鸿, 苏承湖. 不同负载下低压SPD保护距离研究[J]. 电气技术, 2014, 15(09): 45-47.
Lin Yanhong, Su Chenghu. Research of the Protection Distance Using Low-pressure SPD with Different Loads. Electrical Engineering, 2014, 15(09): 45-47.
[1] 谢社初. 信息系统雷电过电压的SPD防护[J]. 电气应用, 2007, 26(8): 16-20. [2] HE J, YUAN Z, XU J, et al. Evaluation of the effective protection distance of low-voltage SPD to equipment [J]. Power Delivery, IEEE Transactions on, 2005, 20(1): 123-130. [3] Protection Against lightning-Part 4: Electrical and Electronic Systems within Structures, IEC 62305-4- 2006, 2006. [4] HE J, YUAN Z, WANG S, et al. Effective protec-tion[4] distances of low-voltage SPD with dif-ferent voltage protection levels[J]. Power De-livery, IEEE Transac- tions on, 2010, 25(1): 187-195. [5] WANG S, HE J. Discussion on Worst Distance Between SPD and Protected Device [J]. Elec-tromagnetic Compatibility, IEEE Transactions on, 2011, 53(4): 1081-1083. [6] Low-Voltage Surge Protective Devices-Part 11: Surge Protective Devices Connected to Low-Voltage Power Systems-Requirements and Tests, IEC Std. IEC 61643- 11, 2002. [7] Low-Voltage Surge Protective Devices-Part 12: Surge Protective Devices Connected to Low-Voltage Power Distribution Sys-tems-Selection and Applications Principles, IEC 61643-12, IEC Std., 2002. [8] 94GB. 建筑物防雷设计规范[S]. 2000.
2014, Vol. 15 
