Abstract：The operating characteristics are forwarded for the 33kV ring network power supply system of Guangzhou metro line 4. Its problems of the time differential for overcurrent protection are illustrated. The time differential of overcurrent protection is discussed. Combined with the actual situation of equipment, resetting and coordination calculate the time differential of overcurrent protection, to further ensure the normal and steady operation of 33kV power supply system of Guangzhou metro line 4.
莫斌涛, 肖伟强, 张泰明, 孙俊明. 广州地铁4号线33kV环网过流保护时限整定研究[J]. 电气技术, 2015, 16(12): 164-165.
Mo Bintao, Xiao Weiqiang, Zhang Taiming, Sun Junming. Research of the Time Differential for 33kV Ring Network Overcurrent Protection of Guangzhou Metro Line 4. Electrical Engineering, 2015, 16(12): 164-165.
2015, Vol. 16 
