保定零序电流互感器电气厂

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.