文章通过推导计及铁心气隙的电流传递函数，分析不同气隙宽度条件下CT的幅频特性和相频特性，同时给出不同气隙宽度下CT的阶跃响应特性。说明在设计、制造和使用过程中，引入合理的气隙，可以提高开启式电流互感器的测量精度。%This essay derives and measures the current transfer functions of the air gaps of the core, analyzes the am- plitude-frequency and phase-frequency characteristics of the current transformer in different air-gap width condi- tions, and gives corresponding step response characteristics in such conditions. The essay proves that reasonable air gaps in the design, manufacturing and application of the current transformer can increase the measurement accuracy of the open-type current transformer.
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