保定零序电流互感器电气厂

零序电流互感器的一次侧三相导线穿过铁芯， 二次线圈绕在铁芯 上。正常情况下，由于零序电流互感器的一次侧三相电流对称，向量 和为零，铁芯中不会产生磁通，二次线圈中没有电流。当系统发生单 相接地故障时，三相电流之和不为零，铁芯中出现零序磁通，该磁通 在二次线圈上感应出电势，二次电流流过继电器使之动作。 零序电流互感器与漏电保护继电器组合， 构成漏电和接地故障保 护装置。通过零序电流互感器检测出超过整定值的零序漏电电流，漏 电保护继电器对比额定动作电流，发出动作信号，断开或接通报警回 路。 三相不平衡可不一定要烧毁东西啊， 只是对供电电网会造成一定 的影响，配电一定要合理分配电能，每一相都不能差得太多了，这样 会使电能合理利用.零序电流互感器是一次穿过三相电缆，每相电流 都相等的时候它不工作， 而是当三相电流不平衡的时候它才发出电流 信号.带动继电器动作，达到保护.一般的电流互感器工作时一次只 穿过一相电线，它是对电流的计量和作保护之用。 零序电流互感器属于电流互感器的一种， 用来检测中性不平衡电流用的装置，一般配合继电保护装置用。电流互感器是用来检测某相 电流或电气保护线路电流的装置，往往配合继电保护装置使用 零序 电流互感器一般用于检测单相两线电流或三相四线电流矢量和是否 为零，不为零时输出触发信号;一般电流互感器只是检测导线上电流 的大小，常用于显示。

The primary conductor of zero sequence current transformer passes through the iron core, and the two coil is wound on the iron core. Normally, because the three-phase current of the zero sequence current transformer is symmetrical and the vector is zero, the magnetic flux is not generated in the iron core, and there is no current in the two coil. When the system single-phase ground fault occurs, and the three-phase current is not zero, zero flux appeared in the core, the flux should be a potential in the two coil on the two, the current through the relay action. The zero sequence current transformer and the leakage protection relay are combined to form the earth leakage and earth fault protection device. The zero sequence current transformer detects zero sequence leakage current over the setting value, and the leakage protection relay compares the rated action current, sends action signal, and disconnects or connects the alarm circuit. The three-phase imbalance may not be to burn things ah, only to the power grid will cause certain impact, the distribution must be reasonable distribution of power, each phase is not too much difference, this will make rational use of electricity. The zero sequence current transformer is a three-phase cable through time, each phase current it is not equal to the work, but when the three phase current unbalance current signal. It is a drive relay, to protect the current transformer. The only one phase through a wire, it is to measure current and for the protection of the. Zero sequence current transformer belongs to a kind of current transformer, which is used to detect neutral unbalanced current. It is generally used with relay protection device. The current transformer is a device used to detect phase current protection circuit or electrical current, often in conjunction with the relay protection device with zero sequence current transformer is generally used for the detection of single-phase or three-phase four wire two wire current and current vector is zero, no output trigger signal is zero; a current transformer is to detect the size of the current on the wire used to display.