This paper introduces the calculation method of start voltage to CT disconnexion protection setting based on the electric power system and the operational characteristics of CT. 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。
The danger to power system brought by CT second-coil disconnexion is discussed. From the view of theory and test wave, the reason of CT disconnexion is analyzed and the investigation data make it known that it is inevitable and essential to install the protection. 从理论及试验波形的角度论述了CT二次绕组开路对电力系统运行造成的危害,分析了造成开路的原因,论证了装设CT开路保护装置的必要性;
The basic request and function of CT disconnexion setting are suggested. 从设计、运行的角度出发,提出了CT开路保护装置应具备的基本要求及功能。