选择CT开路保护装置应注意的几个关键问题

Several Important Problems in Choosing CT Discon-Nexion Protection Setting

结合CT开路保护装置应用状况及CT二次开路所产生过电压的特殊性,阐述了选择CT开路保护装置应注意的事项。运用电力系统及CT运行的特点,详细地介绍了CT开路保护装置动作电压的计算方法等。用实例说明了CT开路保护装置动作电压的计算方法的科学性,殷切希望CT开路保护装置动作电压的计算方法能在实际中发挥作用,并得到不断创新与提升,促进CT开路保护装置的技术研发工作,使其起到应有的作用。

Combined with the application status of CT discon-nexion protection setting and the particularity of overvoltage when CT second side open circuit,the paper explains several important problem should be paid attention in choosing CT discon-nexion protection setting.This paper introduces the calculation method of start voltage to CT discon-nexion protection setting based on the electric power system and the operational characteristics of CT.The article illustrates the scientificity of calculation method of start voltage to CT discon-nexion protection setting by practicing examples,hopes that the method bring into action in actual electric power system,and gain innovation upgrade,promote the technique research and exploitation.