普通电流互感器结构原理：电流互感器的结构较为简单，由相互绝缘的一次绕组、二次绕组、铁心以及构架、壳体、接线端子等组成。其工作原理与变压器基本相同，一次绕组的匝数（N1）较少，直接串联于电源线路中，一次负荷电流(I1)通过一次绕组时，产生的交变磁通感应产生按比例减小的二次电流（I2）；二次绕组的匝数（N2）较多，与仪表、继电器、变送器等电流线圈的二次负荷（Z）串联形成闭合回路，由于一次绕组与二次绕组有相等的安培匝数，I1N1=I2N2，电流互感器额定电流比电流互感器实际运行中负荷阻抗很小，二次绕组接近于短路状态，相当于一个短路运行的变压器。

The structure principle of common current transformer: The structure of current transformer is relatively simple. It consists of primary winding, secondary winding, core, frame, shell, terminal and so on. geshanb.89ix.comtaiyangn.89ix.comgelidun.89ix.comgangguanp.89ix.comtongshizi.71ix.comz

huzaojm.37ix.com.cnIts working principle is basically the same as that of transformer. The number of turns (N1) of primary winding is less. It is directly connected in series with the power supply line. When primary load current (I1) passes through primary winding, the alternating flux induction produces a proportional decrease of secondary current (I2); the number of turns (N2) of secondary winding is more, which is connected in series with the secondary load (Z) of current coils such as meters, relays and transmitters. A closed loop is formed. Because the primary winding and the secondary winding have the same ampere turns, I1N1 = I2N2, the rated current of the current transformer is smaller than the load impedance of the current transformer in actual operation, and the secondary winding is close to the short-circuit state, which is equivalent to a transformer in short-circuit operation.