微机小电流接地选线装置在使用中应注意的问题

Attentive Problems for Application of Computer Small Current Grounding Line Selection Device

在电力系统中,线路出现接地故障后故障点的及时确定和排除对电网的安全运行至关重要。分析了小电流接地系统单相接地故障的原理和微机小电流接地选线装置在实际使用中动作准确率不高的原因及解决方法,给出了零序电流互感器正确的安装和调试方法,保证用电设备的安全正常运行。

In power system the definition and exclusion of ground fault is of most emergent importance for safe operation of power networks. Analysis was made on single-phase ground fault principle for the small current grounding system, as well as the cause of low accuracy and the solution of the question when the computer small current grounding line selection device was used. Right installation and debugging way of the zero-sequence current transformer were given to ensure safe and normal operation of the electrical equipment.