低压外推法测定电流互感器误差

提出的电流互感器误差低压外推测试法，是将现场电流互感器当作误差相同的电压互感器进行测试，先在200％～1000％额定电压(电流)下测互感器的误差和导纳等参数，再通过在1％～120％额定电压(电流)下测导纳，进而由公式推算出电流互感器的误差。测试结果表明与传统方法相符，故这种新方法的推广、应用将对现场电流互感器的检定产生深远的影响。

Error Test of Current Transformers with Low-voltage Deduced Method

It is described in this paper, the error of current transformers could be tested by using deduced method, a current transformer could be tested as a v oltage transformer with the same error. At first, error and admittance could be tested at 200% to 1000% rated voltage(current), then error could be obtained aft er the calculation and the admittance tested at 1% to 120% rated voltage(current ). The generalization and application of this new method would bring a great eff ect to the calibration of locale current transformers.