【摘要】 在变电所220kV线路侧无PT时,可利用CT末屏套管电容电流来抽取线路电压与线路CT二次侧电流一起输入电能表,进而算出该线路的电量数值。为解决普通电磁式电能表的输入阻抗小,无法满足测量上需要的问题,研制了一种新的高精度、高输入阻抗微机电能表。现对其构成原理及安装运行的情况加以介绍。更多还原

【Abstract】 If there is no PT on the 220kV outline side of a substation,the capacitive current of CT terminal shielding bushing is utilized to extract the line voltage ,which is introduced into the electricity meter together with the CT secondary current,and the electricity quantity of this line may be calculated. To solve the problem that the low input impedance of common electromagnetic electricity meter can not satify the measurement needs,a new microprocessed electricity meter of high precision and high input impedance is developed. Here the structure principle and the erection situation of the new meter is recommended.更多还原