电流互感器铁芯的测量和设计计算

Measurement and design calculation of the iron core of current transformer

本文详细介绍测试电流互感器铁芯的一种较好的方法．方法的基本点是，测出二次线圈电阻后，计算二次回路总阻抗，求出给定电流流过该阻抗的电位降落值．此值除以二次线圈的匝数则得单匝应有的感应电动势．测出产生这个电动势的激磁电流及损耗角后，给定级别电流互感器的设计计算便可顺利完成．

In this paper is presented a detailed illustration for a more efficient way to test the iron core of current transformer. In this method, the resistance of the secondary coil is measured for the calculation of the total impedance of the secondary circuit so as to find out the voltage drop of a given current when passing through that impedance.The voltage drop thus obtained is to be divided by the number of turns of the secondary coil in order to find out the induced emf per turn. With both the exciting current and the loss angle of a single turn measured, the design calculation for current transformer of any technical class is finished smoothly.