国内专业零序电流互感器生产厂家，滑县恒和电子有限公司专业生产电子元器件，磁性材料。从事多年具有丰富的经验。零序电流互感器的作用及原理？苑经理为您讲述
Specializing in the zero sequence current transformer manufacturers, Hua county Henghe Electronics Co., Ltd. specializing in the production of electronic components, magnetic materials. Engaged in many years of rich experience. The function and principle of the zero sequence current transformer The court manager told you
零序电流互感器的原理及作用
Principle and function of zero sequence current transformer
原理：零序电流保护的基本原理是基于基尔霍夫电流定律：流入电路中任一节点的复电流的代数和等于零。在线路与电气设备正常的情况下，各相电流的矢量和等于零，因此，零序电流互感器的二次侧绕组无信号输出，执行元件不动作。当发生接地故障时的各相电流的矢量和不为零，故障电流使零序电流互感器的环形铁芯中产生磁通，零序电流互感器的二次侧感应电压使执行元件动作，带动脱扣装置，切换供电网络，达到接地故障保护的目的。
Principle: the basic principle of zero sequence current protection is based on Kirchhoff's current law: any node into the current complex algebra in the circuit and is equal to zero. In line with the electrical equipment under the condition of normal vector, the phase current and zero, therefore, the two winding of zero sequence current transformer no output signal, the actuator does not move. When grounding fault occurs when each phase current vector and is not zero, the fault current enable flux produced in the annular iron core of zero sequence current transformer, zero sequence current transformer secondary side induction voltage to the actuator action and drives the tripping device, switching power supply network to ground fault protection.
作用：当电路中发生触电或漏电故障时，保护动作，切断电源。
Effect: when the electric shock or leakage fault in the circuit, protection, cut off the power supply.
使用：可在三相线路上各装一个电流互感器，或让三相导线一起穿过一零序电流互感器，也可在中性线N上安装一个零序电流互感器，利用其来检测三相的电流矢量和。
Use: can be in the three-phase line are respectively provided with a current transformer, or let the three-phase conductors through a zero sequence current transformer, you can also install a zero sequence current transformer in the neutral line n, using its to detect three-phase current vector and.
在三相四线电路中，三相电流的相量和等于零，即Ia+Ib+IC=0。如果在三相四线中接入一个电流互感器，这时感应电流为零。当电路中发生触电或漏电故障时，回路中有漏电电流流过，这时穿过互感器的三相电流相量和不等零，其相量和为：Ia+Ib+Ic=I(漏电电流)，这样互感器二次线圈中就有一个感应电压，此电压加于检测部分的电子放大电路，与保护区装置预定动作电流值相比较，如大于动作电流，即使灵敏继电器动作，作用于执行元件掉闸。这里所接的互感器称为零序电流互感器，三相电流的相量和不等于零，所产生的电流即为零序电流。
In the three-phase four wire circuit, three-phase current phasor and equal to zero, namely Ia+Ib+IC=0. If access to a current transformer in the three-phase four line, then the induced current is zero. When the circuit of electric shock or the leakage, the loop in a leakage current to flow through, now passing through the transformer of three-phase current phasor and ranging from zero, the phasor and: Ia+Ib+Ic=I (leakage current), such a transformer secondary coil has an induced voltage, this voltage is applied to the detection part of the electronic amplifying circuit, protection and device predetermined action current values are compared, such as greater than current action, even sensitive relay action, the role in the execution of the components of switch off. Here the transformer is called the zero sequence current transformer, three-phase current phasor and is not equal to zero, the current produced is the zero sequence current.